Water-Cooled Scroll Compressor Chillers

Transcription

1 Installation, and Maintenance Manual IMM WGZC Group: Chiller Part Number: Effective: October 2008 Supercedes: June 2008 Water-Cooled Scroll Compressor Chillers WGZ 030CW to WGZ 200CW, Packaged Water-Cooled Chiller WGZ 030CA to WGZ 200CA, Chiller with Remote Condenser 30 to 200 Tons, 105 to 700 kw 60 Hz, R-410A

2 Table of Contents Introduction...3 Nomenclature... 3 Installation... 4 Vibration Isolators... 6 Water Piping Flow Switch Glycol Solutions Condenser Water Piping Pressure Drops Refrigerant Piping...19 Unit with Remote Condenser Factory-Mounted Condenser Dimensions...25 Packaged Chillers Chillers with Remote Condenser Physical Data...31 Packaged Chillers Chillers with Remote Condenser Operating Limits Components Wiring Unit Configuration Electrical Data...39 Electrical Notes Field Wiring Diagram Control Panel Layout Motor Protection Module Start-Up and Shutdown Pre Start-up Start-up Weekend or Temporary Shutdown Start-up after Temporary Shutdown Extended Shutdown Start-up after Extended Shutdown System Maintenance General Electrical Terminals Compressor Lubrication Sightglass and Moisture Indicator Crankcase Heaters Optional Controls Phase/Voltage Monitor (Optional) Hot Gas Bypass (Optional) Maintenance Schedule System Service Troubleshooting Chart Warranty Statement Cover Picture: WGZ 200C, Nominal 200 ton chiller Manufactured in an ISO Certified facility 2007 McQuay International. Illustrations and data cover the McQuay International product at the time of publication and we reserve the right to make changes in design and construction at anytime without notice. The following are trademarks or registered trademarks of their respective companies: BACnet from ASHRAE; LONMARK, LonTalk, LONWORKS, and the LONMARK logo are managed, granted and used by LONMARK International under a license granted by Echelon Corporation; Compliant Scroll from Copeland Corporation; ElectroFin from AST ElectroFin Inc.; Modbus from Schneider Electric; FanTrol, MicroTech II, Open Choices, and SpeedTrol from McQuay International 2 WGZ 030C through 200C IMM WGZC

3 Introduction General Description McQuay Type WGZ water chillers are designed for indoor installations and are available with water-cooled condensers (Model WGZ-CW), or arranged for use with remote, air-cooled or evaporative condensers (Model WGZ-CA). Each water-cooled unit is completely assembled and factory wired before evacuation, charging and testing. They consist of hermetic scroll compressors, brazed-plate evaporators on Models WGZ 030 to 130( shell-and-tube on Models WGZ 150 to 200), water-cooled condenser (WGZ-CW), and complete refrigerant piping. Units manufactured for use with remote condensers (Models WGZ-CA) have all refrigerant specialties factory-mounted and connection points for refrigerant discharge and liquid lines. Liquid line components that are included are manual liquid line shutoff valves, charging valves, filter-driers, liquid line solenoid valves, sight glass/moisture indicators, and thermal expansion valves. Other features include compressor crankcase heaters, and a MicroTech II microprocessor controller. The electrical control center includes all equipment protection and operating controls necessary for dependable automatic operation. The compressors are not fused as standard, but can be protected by optional circuit breakers or fuses, or can rely on a field-installed, fused disconnect switch for protection. Nomenclature W G Z C W Water-Cooled Global W = Water-Cooled Condenser A = Unit Less Condenser Design Vintage Scroll Compressor Nominal Capacity (Tons) Inspection When the equipment is received, all items should be carefully checked against the bill of lading to be sure of a complete shipment. All units must be carefully inspected for damage upon arrival. All shipping damage must be reported to the carrier and a claim must be filed with the carrier. The unit serial plate should be checked before unloading the unit to be sure that it agrees with the power supply available. Physical damage to unit after acceptance is not the responsibility of McQuay. Note: Unit lifting weights are given in the physical data tables beginning on page 5. Corner operating weights are given on page 6 IMM WGZC WGZ 030C through 200C 3

4 Installation Note: Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes and regulations, and experienced with this type of equipment.! WARNING Avoid contact with sharp edges. Personal injury can result Handling Every model WGZ-CW water chiller with water-cooled condensers is shipped with a full refrigerant charge. For shipment, the charge is contained in the condenser and is isolated by the condenser liquid shutoff valve and the compressor discharge valve common to a pair of compressors. A holding charge is supplied in remote condenser models, WGZ-CA. The operating charge must be field supplied and charged. Moving the Unit The skid option is strongly recommended for ease of handling and to help prevent damage if a crane is not available for rigging at site. Figure 1, Lifting the Unit! WARNING If the unit has been damaged, allowing the refrigerant to escape, there can be danger of suffocation in the area since the refrigerant will displace the air. Be sure to review Environmental Protection Agency (EPA) requirements if damage occurred. Avoid exposing an open flame to the refrigerant SPREADER BARS MUST BE USED FOR STABILITY DURING LIFTING OF ALL SIZE UNITS (2) 2 Lifting Holes WGZ C UNIT SHOWN Removable Lifting Bar REV. 0A It is recommended that all moving and handling be performed with skids or dollies under the unit and that they not be removed until the unit is in the final location. Never put the weight of the unit against the control box. In moving, always apply pressure to the base on the skids only and not to the piping or other components. A long bar will help move the unit easily. Avoid dropping the unit at the end of the roll. 4 WGZ 030C through 200C IMM WGZC

5 If the unit must be hoisted, lift the unit from the removable lifting arms factory-bolted to each end of the unit adjacent to the tube sheet by attaching cables or chains to the end of the arms. A spreader bar must be used to protect the piping, control panel and other areas of the chiller (see ). The arms should be removed and discarded after use. Do not attach slings to piping or equipment. Do not attempt to lift the unit by lifting points mounted on the compressors. They are for lifting only the compressor should one need to be removed from the unit. Move unit in the upright horizontal position at all times. Set unit down gently when lowering from the truck or rollers. Table 1, Lifting Loads WGZ-CW Package Units (lbs.) WGZ CA Less Condenser Units (lbs) Model WGZ-C Shipping Shipping L1 L2 L3 L4 L1 L2 L3 L4 Weight Weight WGZ WGZ WGZ WGZ WGZ WGZ WGZ WGZ WGZ WGZ WGZ WGZ WGZ WGZ WGZ WGZ See Figure 2 on the following page for location of lifting points. Location WGZ chillers are designed for indoor application and must be located in an area where the surrounding ambient temperature is 40 F (4 C) or above. A good rule of thumb is to place units where ambient temperatures are at least 5 F (3 C) above the leaving water temperature. Because of the electrical control devices, the units should not be exposed to the weather. A plastic cover over the control box is supplied as temporary protection during shipment. A reasonably level and sufficiently strong floor is required for the water chiller. If necessary, additional structural members should be provided to transfer the weight of the unit to the nearest beams. Space Requirements for Connections and Servicing The chilled water and condenser water (on units with a water-cooled condenser) piping enters and leaves the unit from the right side when looking at the control panel. Left-hand condenser connections are an option. A clearance of at least 3 feet (1219 mm), or more if codes require, should be provided beyond this piping and on all other sides and ends of the unit for general servicing or for changing the compressors, if it ever becomes necessary. IMM WGZC WGZ 030C through 200C 5

6 On units equipped with a water-cooled condenser (Type WGZ-CW) clearance should also be provided for cleaning or removal of condenser tubes on one end of the unit. The clearance for cleaning depends on the type of apparatus used, but can be as much as the length of the condenser (10 feet, 3050 mm). Tube replacement requires the tube length of 10 feet (3050 mm) plus one to two feet of workspace. This space can often be provided through a doorway or other opening. Allow a minimum of 4-foot clearance in front of the control panel. Placing the Unit The small amount of vibration normally encountered with the water chiller makes this unit particularly desirable for basement or ground floor installations where the unit can be mounted directly to the floor. The floor construction should be such that the unit will not affect the building structure, or transmit noise and vibration into the structure. NOTE: Springs are Model CP1E, one spring per housing. Vibration Isolators It is recommended that isolators be used on all upper level installations or in areas where vibration transmission is a consideration. Figure 2, Isolator Locations 4 1 LB LF RB FRF 3 2 Water Connections Transfer the unit as indicated under Moving the Unit. In all cases, set the unit in place and level with a spirit level. When spring-type isolators are required, install springs running under the main unit supports. Control Panel The unit should be set initially on shims or blocks at the listed spring free height. When all piping, wiring, flushing, charging, etc., is completed, the springs are adjusted upward to loosen the blocks or shims that are then removed. A rubber anti-skid pad should be used under isolators if hold-down bolts are not used. Installation of spring isolators requires flexible piping connections and at least three feet of flexible electrical conduit to avoid straining piping and transmitting vibration and noise. Table 2, WGZ-CW Packaged, Mounting Weights & Vibration Mounting Location Unit Mounting Weights, Lbs Spring-Flex Mountings R-I-S Mountings Size M1 M2 M3 M4 M1 M2 M3 M4 M1 M2 M3 M ID-900 ID-900 ID-900 ID-900 RP-3 RP-3 RP-3 RP-3 Green Green Green Green Gray Gray Gray Gray ID-900 ID-900 ID-900 ID-900 RP-3 RP-3 RP-3 RP-3 Green Green Green Green Gray Gray Gray Gray ID-900 ID-900 ID-900 ID-900 RP-3 RP-3 RP-3 RP-3 Green Green Green Green Gray Gray Gray Gray ID-900 ID-900 ID-900 ID-900 RP-3 RP-3 RP-3 RP-3 Green Green Green Green Gray Gray Gray Gray ID-900 ID-900 ID-900 ID-900 RP-3 RP-3 RP-3 RP-3 Green Green Green Green Gray Gray Gray Gray ID-900 ID-900 ID-900 ID-900 RP-3 RP-3 RP-3 RP-3 Green Green Green Green Gray Gray Gray Gray ID-900 ID-900 ID-900 ID-900 RP-3 RP-3 RP-3 RP-3 Green Green Green Green Gray Gray Gray Gray 6 WGZ 030C through 200C IMM WGZC

7 WGZ-CW Packaged, Mounting Weights & Vibration Mounting Location, Continued Unit Mounting Weights, Lbs Spring-Flex Mountings R-I-S Mountings Size M1 M2 M3 M4 M1 M2 M3 M4 M1 M2 M3 M ID-1350 ID-1350 ID-1350 ID-1350 RP-4 RP-4 RP-4 RP-4 Purple Purple Purple Purple Brown Brown Brown Brown ID-1350 ID-1350 ID-1350 ID-1350 RP-4 RP-4 RP-4 RP-4 Purple Purple Purple Purple Brown Brown Brown Brown ID-1800 ID-1800 ID-1800 ID-1800 RP-4 RP-4 RP-4 RP-4 Green Green Green Green Brown Brown Brown Brown ID-1800 ID-1800 ID-1800 ID-2400 RP-4 RP-4 RP-4 RP-4 Green Green Green Gray Brick Red Brick Red Brick Red Brick Red ID-1800 ID-1800 ID-1800 ID-2400 RP-4 RP-4 RP-4 RP-4 Green Green Green Gray Brick Red Brick Red Brick Red Brick Red ID-1800 ID-1800 ID-1800 ID-2400 RP-4 RP-4 RP-4 RP-4 Green Green Green Gray Brick Red Brick Red Brick Red Brick Red ID-2400 ID-2400 ID-2400 ID-2400 RP-4 RP-4 RP-4 RP-4 Gray Gray Gray Gray Brick Red Brick Red Brick Red Brick Red ID-2400 ID-2400 ID-2400 ID-2400 RP-4 RP-4 RP-4 RP-4 Gray Gray Gray Gray Brick Red Brick Red Brick Red Brick Red ID-2400 ID-2400 ID-2400 ID-2400 RP-4 RP-4 RP-4 RP-4 Gray Gray Gray Gray Brick Red Brick Red- Brick Red Brick Red WR Table 3, WGZ-CA, Remote Condenser, Mounting Weights & Vibration Mounting Location Unit Mounting Weights, Lbs Spring-Flex Mountings R-I-S Mountings Size M1 M2 M3 M4 M5 M6 M1 M2 M3 M4 M5 M6 M1 M2 M3 M4 M5 M N/A N/A ID-900 ID-900 ID-510 ID-510 RP-3 RP-3 RP-3 RP-3 N/A N/A Green Green Black Black Lime Lime Lime Lime N/A N/A N/A N/A ID-900 ID-900 ID-510 ID-510 RP-3 RP-3 RP-3 RP-3 N/A N/A Green Green Black Black Lime Lime Lime Lime N/A N/A N/A N/A ID-900 ID-900 ID-510 ID-510 RP-3 RP-3 RP-3 RP-3 N/A N/A Green Green Black Black Lime Lime Lime Lime N/A N/A N/A N/A ID-900 ID-900 ID-510 ID-510 RP-3 RP-3 RP-3 RP-3 N/A N/A Green Green Black Black Lime Lime Lime Lime N/A N/A N/A N/A ID-900 ID-900 ID-510 ID-510 RP-3 RP-3 RP-3 RP-3 N/A N/A Green Green Black Black Lime Lime Lime Lime N/A N/A N/A N/A ID-900 ID-900 ID-510 ID-510 RP-3 RP-3 RP-3 RP-3 N/A N/A Green Green Black Black Lime Lime Lime Lime N/A N/A N/A N/A ID-900 ID-900 ID-510 ID-510 RP-3 RP-3 RP-3 RP-3 N/A N/A Green Green Black Black Lime Lime Lime Lime N/A N/A N/A ID-900 ID-900 ID-675 ID-900 RP3 RP3 RP3 RP3 N/A N/A N/A Green Green Purple Green Gray Gray Gray Gray N/A N/A N/A ID-900 ID-900 ID-675 ID-900 RP-3 RP-3 RP-3 RP-3 N/A N/A N/A Green Green Purple Green Gray Gray Gray Gray N/A N/A N/A ID-1020 ID-1020 ID-680 ID-1020 RP-3 RP-3 RP-3 RP-3 N/A N/A N/A Black Black Red Black Gray Gray Gray Gray N/A N/A N/A ID-1020 ID-1020 ID-680 ID-1020 RP-3 RP-3 RP-3 RP-3 N/A N/A N/A Black Black Red Black Gray Gray Gray Gray N/A N/A N/A ID-1020 ID-1020 ID-680 ID-1020 RP-3 RP-3 RP-3 RP-3 N/A N/A N/A Black Black Red Black Gray Gray Gray Gray N/A N/A N/A ID-1020 ID-1020 ID-680 ID-1020 RP-3 RP-3 RP-3 RP-3 N/A N/A N/A Black Black Red Black Gray Gray Gray Gray N/A N/A IMM WGZC WGZ 030C through 200C 7

8 WGZ-CA, Remote Condenser, Mounting Weights & Vibration Mounting Location, Continued Unit Mounting Weights, Lbs Spring-Flex Mountings R-I-S Mountings Size M1 M2 M3 M4 M5 M6 M1 M2 M3 M4 M5 M6 M1 M2 M3 M4 M5 M6 ID-1020 ID-1020 ID-1020 ID-1020 ID-1020 ID-1020 RP-4 RP-4 RP-4 RP-4 RP-4 RP Black Black Black Black Black Black Brown Brown Brown Brown Brown Brown ID-1020 ID-1020 ID-1020 ID-1020 ID-1020 ID-1020 RP-4 RP-4 RP-4 RP-4 RP-4 RP Black Black Black Black Black Black Brown Brown Brown Brown Brown Brown ID-1020 ID-1020 ID-1020 ID-1020 ID-1020 ID-1020 RP-4 RP-4 RP-4 RP-4 RP-4 RP Black Black Black Black Black Black Brown Brown Brown Brown Brown Brown Table 4, WGZ-CW, Packaged, Isolator Kit Numbers Model Number Spring-Flex R-I-S Table 5, WGZ-CA, Remote Condenser, Isolator Kit Numbers Model Number Spring-Flex R-I-S Figure 3, Spring Flex Mounting. CP-2 8 WGZ 030C through 200C IMM WGZC

9 Figure 4, Neoprene-in-Shear Mounting, RP-3 1/2-13 TAP ø.56 DIA. 2 HOLES ø3.38 LOCATING PIN TO BE INSTALLED HERE MOUNTING MOLDED IN DURULENE. WEATHER RESISTANT (WR) (R).25 DRAWING NUMBER ALL DIMENSIONS ARE IN DECIMAL INCHES Table 6, Spring Flex Mounting, CP-1 IMM WGZC WGZ 030C through 200C 9

10 Table 7, Neoprene-in-Shear, RP ø nc-2b R TYP. VM&C VM&C R.28 TYP R4 RECESSED GRIP RIBS R.250 TYP. R.750 TYP. DURULENE MATERIAL 1.13 ±.25 APPROX NOTES: 1. MOUNT MATERIAL TO BE DURULENE RUBBER. 2. MOLDED STEEL AND ELASTOMER MOUNT FOR OUTDOOR SERVICE CONDITIONS. 3. RP-4 MOUNT VERSION WITH STUD IN PLACE. RAISED GRIP RIBS DRAWING NUMBER ALL DIMENSIONS ARE IN DECIMAL INCHES 10 WGZ 030C through 200C IMM WGZC

11 Water Piping Vessel Drains at Start-up Condensers are drained of water in the factory and are shipped with the condenser drain plugs in the heads removed and stored in a bag in the control panel. Be sure to replace plugs prior to filling the vessel with fluid. General Due to the variety of piping practices, it is advisable to follow the recommendations of local authorities for code compliance. They can supply the installer with the proper building and safety codes required for a safe and proper installation. Basically, the piping should be designed with a minimum number of bends and changes in elevation to keep system cost down and performance up. Other piping design considerations include: 1. All piping should be installed and supported to prevent the chiller connections from bearing any strain or weight of the system piping. 2. Vibration eliminators to reduce vibration and noise transmission to the building. 3. Shutoff valves to isolate the unit from the piping system during unit servicing. 4. Manual or automatic air vent valves at the high points of the system. Drains should be placed at the lowest points in the system. 5. Some means of maintaining adequate system water pressure (e.g., expansion tank or regulating valve). 6. Temperature and pressure indicators located within 3 feet (0.9 meters) of the inlet and outlet of the vessels to aid in unit servicing. 7. A strainer or some means of removing foreign matter from the water before it enters the pump is recommended. It should be placed far enough upstream to prevent cavitation at the pump inlet (consult pump manufacturer for recommendations). The use of a strainer will prolong pump life and thus maintain system performance. Important Note A cleanable 40-mesh strainer must also be placed in the water line just prior to the inlet of the evaporator on Models WGZ 030 to 130. A 20-mesh is satisfactory on Models WGZ 150 to 200. This will aid in preventing foreign material from entering and decreasing the performance of the evaporator. 8. If the unit is used as a replacement chiller on a previously existing piping system, the system should be thoroughly flushed prior to unit installation. Regular water analysis and chemical water treatment on the evaporator and condenser is recommended immediately upon equipment start-up. 9. In the event glycol is added to the water system, as an afterthought for freeze protection, recognize that the refrigerant suction pressure will be lower, cooling performance less, and water side pressure drop will be higher. If the percentage of glycol is large, or if propylene glycol is used instead of ethylene glycol, the added pressure drop and loss of performance could be substantial. Reset the freezestat and low leaving water alarm temperatures. The freezestat is factory set to default at 36 F (2.2 C). Reset the freezestat setting to approximately 4 to 5 F (2.3 to 2.8 C) below the leaving chilled water setpoint temperature. See the section titled Glycol Solutions for additional information concerning the use of glycol. 10. A preliminary leak check of the water piping should be made before filling the system. IMM WGZC WGZ 030C through 200C 11

12 Note: A water flow switch or pressure differential switch must be mounted in the evaporator outlet water line to signal that there is water flow before the unit will start. Table 8, Typical Field Evaporator Water Piping, WGZ 030 to 130 Air Vent Inlet Strainer P Vibration Eliminators Isolation Valves Outlet Drain Flow Switch NOTE: Water piping must be supported independently from the unit. Figure 5, Typical Field Evaporator Water Piping, WGZ 150 to 200 Liquid Out Drain Vent In Vibration Eliminator Suction Valved Pressure Gauge Vibration Eliminator Water Strainer Flow Switch Balancing Gate Valve Valve Gate Valve Flow Flow Protect All Field Piping Against Freezing NOTE: Inlet and outlet connections may be reversed on some units. Check unit dimension drawing. System Water Volume It is important to have adequate water volume in the system to provide an opportunity for the chiller to sense a load change, adjust to the change, and then stabilize. As the expected load change becomes more rapid, a greater water volume is needed. The system water volume is the total amount of water in the evaporator, air handling equipment, and associated piping. If the water volume is too low, operational problems can occur including rapid compressor cycling, rapid loading and unloading of compressors, erratic refrigerant flow in the chiller, improper motor cooling, shortened equipment life and other undesirable occurrences. For normal comfort cooling applications where the cooling load changes relatively slowly, a minimum system volume of two to three minutes times the flow rate (GPM) is recommended. For example, if the design chiller flow rate is 120 gpm, we recommend a system volume of 240 to 360 gallons. For process applications where the cooling load can change rapidly, additional system water volume is needed. A process example would be the quenching of hot metal objects. The load would be very stable until the hot metal is dipped into the water tank. Then, the load would increase drastically. Since there are many other factors that can influence performance, systems can successfully operate below these suggestions. However, as the water volume decreases below these guidelines, the possibility of problems increases. 12 WGZ 030C through 200C IMM WGZC

13 Variable Chilled Water Flow Reducing chilled water flow in proportion to load can reduce total system power consumption. Certain restrictions apply to the amount and rate of flow change. The rate of flow change should be a maximum of 10 percent of the change, per minute. Do not reduce flow lower than the part load minimum flows listed on page 16. Chilled Water Piping The system water piping must be flushed thoroughly prior to making connections to the unit evaporator. It is required that a 40-mesh strainer be installed in the return water line before the inlet to the chiller. Lay out the water piping so the chilled water circulating pump discharges into the evaporator inlet. The return water line must be piped to the evaporator inlet connection and the supply water line must be piped to the evaporator outlet connection. If the evaporator water is piped in the reverse direction, a substantial decrease in capacity and efficiency of the unit will be experienced. A flow switch must be installed in the horizontal piping of the supply (evaporator outlet) water line to prove water flow before starting the unit. Drain connections should be provided at all low points in the system to permit complete drainage of the system. Air vents should be located at the high points in the system to purge air out of the system. The evaporators are not equipped with vent or drain connections and provision must be made in the entering and leaving chilled water piping for venting and draining. Pressure gauges should be installed in the inlet and outlet water lines to the evaporator. Pressure drop through the evaporator should be measured to determine water flow from the flow/pressure drop curves beginning on page 17. Vibration eliminators are recommended in both the supply and return water lines. Chilled water piping should be insulated to reduce heat loss and prevent condensation. Complete unit and system leak tests should be performed prior to insulating the water piping. Insulation with a vapor barrier would be the recommended type of insulation. If the vessel is insulated, the vent and drain connections must extend beyond the proposed insulation thickness for accessibility. Chillers not run in the winter should have their water systems thoroughly drained if subject to sub-freezing temperatures. If the chiller operates year-round, or if the system is not drained for the winter, the chilled water piping exposed to sub-freezing ambient temperatures should be protected against freezing by wrapping the lines with a heater cable. In addition, an adequate percentage of glycol should be added to the system to further protect the system during low ambient temperature periods. It should be noted that water piping that has been left drained is subject to more corrosion than if filled with water. Use of a Vapor Corrosion Inhibitor (VCI) or some other protection should be considered. Figure 6 Thermostat Well Location, WGZ Suction Circuit #1 Suction Circuit #2 Leaving Chilled Water Sensor Liquid Circuit #2 Liquid Circuit #1 The chilled water sensor is factory installed in the leaving water connection on the evaporator. Care should be taken not to damage the sensor cable or lead wires when working around the unit. It is also advisable to check the lead wire before running the unit to be sure that it is firmly anchored and not rubbing on the frame or any other component. If the sensor is ever removed from the well for servicing, care must be taken to not wipe off the heat-conducting compound supplied in the well. IMM WGZC WGZ 030C through 200C 13

14 ! CAUTION The thermostat bulb should not be exposed to water temperatures above 125 F (51.7 C) since this will damage it. Flow Switch A water flow switch must be mounted in the leaving evaporator and condenser water lines to prove adequate water flow before the unit can start. This will safeguard against slugging the compressors on start-up. It also serves to shut down the unit in the event that water flow is interrupted to guard against evaporator freeze-up. Factory-mounted and wired evaporator and condenser flow switches are available as an option If the optional factory flow switch is not supplied, a flow switch is available from McQuay under part number It is a paddle type switch and adaptable to any pipe size from 1 in. (25 mm) to 6 in. (152 mm) nominal. Certain flow rates are required to open the switch and are listed in Table 9. Wire from switch terminals Y and R to panel terminals 33 and 43 (chilled water) and 41 and 53 (condenser water). There is also a set of normally closed contacts on the switch that could be used for an indicator light or an alarm to indicate when a no flow condition exists. 1. Apply pipe sealing compound to only the threads of the switch and screw unit into 1 in. (25 mm) reducing tee. The flow arrow must be pointed in the correct direction. 2. Piping should provide a straight length before and after the flow switch of at least five times the pipe diameter without any valves, elbows, or other flow restricting elements.! CAUTION Make sure the arrow on the side of the switch is pointed in the direction of flow. The flow switch is designed to handle the control voltage and should be connected according to the wiring diagram Table 9, Paddle-Type Flow Switch Flow Rates Pipe Size inch 1 1/4 1 1/ / NOTES (x) mm 32 (2) 38 (2) (3) (4) 127 (4) 153 (4) 204 (5) gpm Flow Min. Lpm Adjst. No gpm Flow Lpm gpm Flow Max. Lpm Adjst. No gpm Flow Lpm NOTES: 1. A segmented 3-inch paddle (1, 2, and 3 inches) is furnished mounted, plus a 6-inch paddle loose. 2. Flow rates for a 2-inch paddle trimmed to fit the pipe. 3. Flow rates for a 3-inch paddle trimmed to fit the pipe. 4. Flow rates for a 3-inch paddle. 5. Flow rates for a 6-inch paddle. Glycol Solutions Chiller capacity, flow rate, evaporator pressure drop, and power input for glycol solutions can be calculated using the following formulas and reference to Table 10 for ethylene and Table 11 for propylene glycol. 1. Capacity, Capacity is reduced compared to that with plain water. To find the reduced value, multiply the chiller s capacity when using water by the capacity correction factor C to find the chiller s capacity when using glycol. 2. Flow, To determine evaporator gpm (or ΔT) knowing ΔT (or gpm) and capacity: x Glycol Capacity Glycol GPM = 24 ΔT x Flow Correction G From Tables 14 WGZ 030C through 200C IMM WGZC

15 For Metric Applications -- Determine evaporator lps (or ΔT) knowing ΔT (or lps) and kw: kw Glycol Lps = 4.18 x ΔT x Flow Correction G from Tables 3. Pressure Drop, To determine glycol pressure drop through the cooler, enter the water pressure drop graph on page 16 at the actual glycol flow. Multiply the water pressure drop found there by P to obtain corrected glycol pressure drop. 4. Power, To determine glycol system kw, multiply the water system kw by factor K. Test coolant with a clean, accurate, glycol solution hydrometer (similar to that found in service stations) to determine the freezing point. Obtain percent glycol from the freezing point found in Table 10 or Table 11. On glycol applications the supplier normally recommends that a minimum of 25% solution by weight be used for protection against corrosion or the use of additional inhibitors. Note: The effect of glycol in the condenser is negligible. As glycol increases in temperature, its characteristics have a tendency to mirror those of water. Therefore, for selection purposes, there is no derate in capacity for glycol in the condenser. Table 10, Ethylene Glycol Percent Freezing Point P (Pressure C (Capacity) K (Power) G (Flow) Glycol F C Drop) Table 11, Propylene Glycol Percent Freezing Point P (Pressure C (Capacity) K (Power) G (Flow) Glycol F C Drop) ! CAUTION Do not use automotive antifreeze. Industrial glycols must be used. Automotive antifreeze contains inhibitors that causes plating on copper tubes. The type and handling of glycol used must be consistent with local codes. IMM WGZC WGZ 030C through 200C 15

16 Condenser Water Piping Arrange the condenser water so the water enters the bottom connection of the condenser. The condenser water will discharge from the top connection. Failing to arrange the condenser water as stated above will negatively affect the capacity and efficiency. Install pressure gauges in the inlet and outlet water lines to the condenser. Pressure drop through the condenser should be measured to determine flow on the pressure drop/flow curves on page 18. Vibration eliminators are recommended in both the supply and return water lines. Install a 20-mesh strainer in the inlet piping to the condenser. Water-cooled condensers can be piped for use with cooling towers, well water, or heat recovery applications. Cooling tower applications should be made with consideration of freeze protection and scaling problems. Contact the cooling tower manufacturer for equipment characteristics and limitations for the specific application. Head pressure control must be provided if the entering condenser water can fall below 60 F. The WGZ condenser has two refrigerant circuits with a common condenser water circuit. This arrangement makes head pressure control with discharge pressure actuated control valves difficult. If the tower water temperature cannot be maintained at a 60 F minimum, or when pond, lake, or well water that can fall below 60 F (15 C) is used as the condensing medium, special discharge pressure control must be used. A water recirculating system with recirculating pump as shown in Table 12 is recommended. This system also has the advantage of maintaining tube velocity to help prevent tube fouling. The pump should cycle with the chiller. Table 12, Recirculating Discharge Pressure Control System Circuit #1 Inlet Circuit #2 Inlet Temperature Control Valve Condenser Condenser Water Circuit #1 Outlet Circuit #2 Outlet Pressure Drops The evaporator flow rates and pressure drops shown on the following page (Figure 7) are for full load design purposes. The maximum flow rate and pressure drop are based on a 6-degree temperature drop. Avoid higher flow rates with resulting lower temperature drops to prevent potential control problems resulting from very small control bands and limited start up/shut off temperature changes. The minimum flow and pressure drop is based on a full load evaporator temperature drop of 16-degrees. Condenser pressure drops are shown in Figure 8 on page WGZ 030C through 200C IMM WGZC

17 Figure 7, Evaporator Pressure Drop, WGZ 030C WGZ 200C Pressure Drop (ft of water) Flow Rate (GPM) Minimum Flow Nominal Flow Maximum Flow WGZ-C Model Inch-Pound S.I. Inch-Pound S.I. Inch-Pound S.I. GPM Ft. L/S kpa GPM Ft. L/S kpa GPM Ft. L/S kpa Notes: 1. Minimum, nominal, and maximum flows are at a 16-degree F, 10-degree F, and 6-degree F chilled water temperature range respectively and at ARI tons. IMM WGZC WGZ 030C through 200C 17

18 Figure 8, Condenser Pressure Drop, WGZ 030C WGZ 200C Pressure Drop (ft of water) Flow Rate (GPM) Unit Model Nom Tons Min. Flow & PD Nom. Flow & PD Max. Flow & PD IP SI IP SI IP SI GPM Ft. L/S kpa GPM Ft. L/S kpa GPM Ft. L/S kpa WGZ030C WGZ035C WGZ040C WGZ045C WGZ050C WGZ055C WGZ060C WGZ070C WGZ080C WGZ090C WGZ100C WGZ115C WGZ130C WGZ150C WGZ170C WGZ200C WGZ 030C through 200C IMM WGZC

19 Refrigerant Piping Unit with Remote Condenser General Refrigerant piping, to and from the unit, should be sized and installed according to the latest ASHRAE Handbook. It is important that the unit piping be properly supported with sound and vibration isolation between tubing and hanger, and that the discharge lines be looped at the condenser and trapped at the compressor to prevent refrigerant and oil from draining into the compressors. Looping the discharge line also provides greater line flexibility. NOTE: Do not install any refrigerant piping underground. The discharge gas valves, liquid line solenoids, filter-driers, moisture indicators, and thermostatic expansion valves are all factory mounted as standard equipment with the water chiller. For remote condenser application (WGZ-CA) such as air-cooled or evaporative condenser, the chillers are shipped with an R-410A holding charge. The unit is evacuated in the factory to 500 microns before charging with the holding. The unit is leak tested after charging and before shipment. The liquid line has a shutoff valve upstream from the liquid line solenoid valve and a copper tube cap to be brazed on this line after test to seal this line for shipment. The discharge line has a ball valve installed between the compressor and the discharge stub tube with a copper tube cap brazed on the line after test to seal it for shipment. The discharge gas valves, liquid line solenoids, filter-driers, moisture indicators, and thermostatic expansion valves are all factory-mounted as standard equipment with the water chiller.! DANGER Do not apply heat, such as a brazing torch, to a sealed unit, vessel, or component. Internal gases can increase the internal pressure and cause a life-threatening explosion. Open the system when heating. The short line between a valve and brazed end cap can be drilled to vent it. Note that the valve may leak and the entire unit charge may be open to the cap. It is important that the unit be kept tightly closed until the remote condenser is installed, piped to the unit and the high side evacuated. NOTE: it is possible to maintain a positive refrigerant pressure in the unit when a small leak is present. Therefore, add refrigerant to the unit to achieve sufficient pressure to allow a good leak test and carefully leak test the unit. Correct any leaks found. When the field piping has been leak tested, evacuated, and is ready to charge, the unit valves can be opened and the system charged. Alternate method: an alternate method is to open up the unit to the field piping and to pressure test, evacuate and charge the entire system together at one time. Many people feel that this is a more straight-forward approach. After the equipment is properly installed, leak tested, and evacuated, it can be charged with R-410A, and run at design load conditions. Add charge until the liquid line sight glass is clear, with no bubbles flowing to the expansion valve. Total operating charge will depend on the air-cooled condenser used and volume of the refrigerant piping. IMM WGZC WGZ 030C through 200C 19

20 NOTE: On WGZ-CA units (units with remote condensers), the installer is required to record the refrigerant charge by stamping the total charge and the charge per circuit on the serial plate in the appropriate blocks provided for this purpose. The following discussion is intended for use as a general guide to the piping of air-cooled condensers. Discharge lines must be designed to handle oil properly and to protect the compressor from damage that can result from condensing liquid refrigerant in the line during shutdown. Total friction loss for discharge lines of 3 to 6 psi (20.7 to 41.4 kpa) is considered good design. Careful consideration must be given for sizing each section of piping to insure that gas velocities are sufficient at all operating conditions to carry oil. If the velocity in a vertical discharge riser is too low, considerable oil can collect in the riser and the horizontal header, causing the compressor to lose its oil and result in damage due to lack of lubrication. When the compressor load is increased, the oil that had collected during reduced loads can be carried as a slug through the system and back to the compressor, where a sudden increase of oil concentration can cause liquid slugging and damage to the compressor. Any horizontal run of discharge piping should be pitched away from the compressor approximately 1/8 inch (6.4 mm) per foot (meter) or more. This is necessary to move, by gravity, any oil lying in the header. Oil pockets must be avoided because oil needed in the compressor would collect at such points and the compressor crankcase can become starved. It is recommended that any discharge lines coming into a horizontal discharge header rise above the centerline of the discharge header. This is necessary to prevent any oil or condensed liquid from draining to the compressor heads when the compressor is not running. In designing liquid lines, it is important that the liquid reach the expansion valve without flash gas since this gas will reduce the capacity of the valve. Because flashing can be caused by a pressure drop in the liquid line, the pressure losses due to friction and changes in static head should be kept to a minimum. A check valve must be installed in the liquid line in all applications where the ambient temperature can drop below the equipment room temperature. This prevents liquid migration to the condenser, helps maintain a supply of refrigerant in the liquid line for initial start-up, and keeps liquid line pressure high enough on off cycle to keep the expansion valve closed. On systems as described above, a relief valve or relief-type check valve, must be used in the liquid line as shown in piping systems (shown in and Its purpose is to relieve dangerous hydraulic pressures that could be created as cool liquid refrigerant trapped in the line between the check valve and the expansion or shutoff valve warms up. Install a relief device in the hot gas piping at the condenser coil as shown in and Figure 10. Install a discharge check valve in the discharge line, in a horizontal run, close to the condenser. Recommended Line Sizing The following tables provide recommended line sizing for the field piping. Final design should be based on ASHRAE design standards. 20 WGZ 030C through 200C IMM WGZC

21 Table 13, Equivalent Feet for Fittings Fitting Type 7/8 1 1/8 1 3/8 1 5/8 2 1/8 2 5/8 3 1/8 Elbows 90º Standard º Long Radius º Street º Standard º Street º Bend Tees Full Size Reducing Valves Globe Valve, Open Gate Valve, Open Angle Valve, Open Table 14, Maximum Line Size for Oil Carry Up a Discharge Riser, R-410A Unit Size WGZ 030 WGZ 035 WGZ 040 WGZ 045 WGZ 050 WGZ 055 WGZ 060 WGZ 070 WGZ 080 WGZ 090 Line Size (in.) 1 5/8 1 5/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 Unit Size WGZ 100 WGZ 115 WGZ 130 WGZ 150 WGZ 170 WGZ 200 Line Size (in.) 2 5/8 3 1/8 3 1/8 2 5/8 3 1/8 3 1/8 Table 15, Recommended Liquid Line Size, R-410A Unit Model WGZ-CB Connection Recommended Liquid Line Size (in.) Size at Unit Up to Up to Up to Up to Up to (in.) 50 Equiv. Ft 75 Equiv. Ft 100 Equiv. Ft 125 Equiv. Ft 150 Equiv. Ft WGZ 030 7/8" 7/8 " 7/8 " 7/8 " 7/8 " 7/8 " WGZ 035 7/8" 7/8 " 7/8 " 7/8 " 7/8 " 1 1/8 " WGZ 040 7/8" 7/8 " 7/8 " 7/8 " 1 1/8 " 1 1/8 " WGZ 045 7/8" 7/8 " 7/8 " 7/8 " 1 1/8 " 1 1/8 " WGZ 050 7/8" 7/8 " 7/8 " 7/8 " 1 1/8 " 1 1/8 " WGZ 055 7/8" 7/8 " 7/8 " 1 1/8 1 1/8 " 1 1/8 " WGZ 060 7/8" 7/8 7/8 " 1 1/8 " 1 1/8 " 1 1/8 " WGZ /8 1 1/8 1 1/8 " 1 1/8 " 1 1/8 " 1 1/8 WGZ /8 1 1/8 " 1 1/8 " 1 1/8 1 1/8 1 1/8 WGZ /8 1 1/8 " 1 1/8 " 1 1/8 1 1/8 1 1/8 WGZ /8 1 1/8 " 1 1/8 " 1 1/8 1 1/8 1 1/8 WGZ /8 1 1/8 " 1 1/8 " 1 1/8 1 3/8 1 3/8 WGZ /8 1 1/8 " 1 3/8 1 1/8 1 3/8 1 3/8 WGZ /8 1 3/8 1 1/8 " 1 3/8 1 3/8 1 3/8 WGZ /8 1 3/8 1 1/8 " 1 3/8 1 3/8 1 3/8 WGZ /8 1 3/8 1 1/8 " 1 3/8 1 3/8 1 3/8 IMM WGZC WGZ 030C through 200C 21

22 Table 16, Recommended Horizontal or Downflow Discharge Line Size, R-410A Unit Model AGZ-CB Connection Recommended Discharge Line Sizes Size Up to Up to Up to Up to Up to At Unit 50 Equiv. Ft 75 Equiv. Ft 100 Equiv. Ft 125 Equiv. Ft 150 Equiv. Ft WGZ /8" 1 1/8" 1 1/8" 1 1/8" 1 1/8" 1 1/8" WGZ /8" 1 3/8" 1 3/8" 1 3/8" 1 3/8" 1 3/8" WGZ /8" 1 3/8" 1 3/8" 1 3/8" 1 3/8" 1 3/8" WGZ /8" 1 3/8" 1 3/8" 1 3/8" 1 3/8" 1 3/8" WGZ /8" 1 3/8" 1 3/8" 1 3/8" 1 3/8" 1 3/8" WGZ /8" 1 3/8" 1 3/8" 1 3/8" 1 3/8" 1 3/8" WGZ /8" 1 3/8" 1 5/8 1 5/8 1 5/8 1 5/8 WGZ /8" 1 3/8" 1 5/8 1 5/8 1 5/8 1 5/8 WGZ /8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 WGZ /8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 WGZ /8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 WGZ /8 1 5/8 1 5/8 2 1/8" 2 1/8" 2 1/8" WGZ /8 1 5/8 2 1/8" 2 1/8" 2 1/8" 2 1/8" WGZ /8" 2 1/8" 2 1/8" 2 1/8" 2 1/8" 2 1/8" WGZ /8" 2 1/8" 2 1/8" 2 1/8" 2 1/8" 2 1/8" WGZ /8" 2 1/8" 2 1/8" 2 1/8" 2 1/8" 2 5/8" Typical Arrangements Figure 9 illustrates a typical piping arrangement involving a remote air-cooled condenser located at a higher elevation than the compressor and receiver. This arrangement is commonly encountered when the air-cooled condenser is on a roof and the compressor and receiver are on grade level or in a basement equipment room. Notice, in both illustrations, that the hot gas line is looped at the bottom and top of the vertical run. This is done to prevent oil and condensed refrigerant from flowing back into the compressor and causing damage. The highest point in the discharge line should always be above the highest point in the condenser coil. It is advisable to include a purging vent at this point to extract non-condensables from the system. Figure 10 illustrates another very common application where the air-cooled condenser is located on essentially the same level as the compressor and receiver. The discharge line piping in this case is not too critical. The principal problem encountered with this arrangement is that there is frequently insufficient vertical distance to allow free drainage of liquid refrigerant from the condenser coil to the receiver. The receiver is used when it is desired to have refrigerant storage capacity, in addition to the pumpdown capability of the condenser. 22 WGZ 030C through 200C IMM WGZC

23 Figure 9, Condenser Above Compressor and Optional Receiver Installation Check Valve Relief Valve Purge Valve Condenser Pitch Subcooler Discharge Line Relief Valve (Vent to Outdoors or to Condenser Side of Liquid Line Check Valve) Preferred Subcooler Hook-up To Evap. Receiver Bypass Receiver Check Valve Loop Figure 10, Condenser and Compressor on Same Level, Optional Receiver Installation The receiver shown is optional and not used on many installations. It is bypassed during normal operation. Check Valve Relief Valve Purge Valve Discharge Line Pitch Condenser Subcooler Check Valve Relief Valve (Vent to Outdoors or to Condenser Side of Liquid Line Check Valve) Preferred Subcooler Hook-up To Evap. Receiver Bypass Receiver Check Valve IMM WGZC WGZ 030C through 200C 23

24 Factory-Mounted Condenser Units with the standard water-cooled, factory-mounted condenser are provided with complete refrigerant piping and full operating refrigerant charge at the factory. There is a remote possibility on water-cooled units utilizing low temperature pond or river water as a condensing medium, and if the water valves leak, that the condenser and liquid line refrigerant temperature could drop below the equipment room temperature on the off cycle. This problem only arises during periods when cold water continues to circulate through the condenser and the unit remains off due to satisfied cooling load. If this condition occurs: 1. Cycle the condenser pump off with the unit. 2. Check the liquid line solenoid valve for proper operation. Relief Valve Piping The ANSI/ASHRAE Standard 15, Safety Standard for Refrigeration Systems, specifies that pressure relief valves on vessels containing Group 1 refrigerant (R-22) shall discharge to the atmosphere at a location not less than 15 feet (4.6 meters) above the adjoining ground level and not less than 20 feet (6.1 meters) from any window, ventilation opening or exit in any building. The piping must be provided with a rain cap at the outside terminating point and with a drain at the low point on the vent piping to prevent water buildup on the atmospheric side of the relief valve. In addition, a flexible pipe section should be installed in the line to eliminate any piping stress on the relief valve(s). The size of the discharge pipe from the pressure relief valve should not be less than the size of the pressure relief outlet. When two or more vessels are piped together, the common header and piping to the atmosphere should not be less than the sum of the area of each of the lines connected to the header. NOTE: Fittings should be provided to permit vent piping to be easily disconnected for inspection or replacement of the relief valve. Table 17, Relief Valve Piping 24 WGZ 030C through 200C IMM WGZC

25 Dimensions Packaged Chillers Figure 11, WGZ 030CW through WGZ 060CW "A" L4 / M4 L3 / M3 WATER CONNECTIONS L1 / M1 CONTROL BOX L2 / M MICROTECH II USER INTERFACE CIRCUIT 2 CIRCUIT 1 CONTROL CONNECTION.88 KNOCKOUTS ON OPPOSITE SIDE REMOVABLE DISC. HANDLE INLET EVAPORATOR OUTLET VENT POWER CONNECTIONS REMOVE BRKT. FOR SHIPPING ONLY " Y " DRAIN RELIEF VALVES " X " REF OUTLET CONDENSER INLET " Y ".88 KNOCKOUTS " Z " DIA MOUNTING HOLES (4) WGZ030C-060C Packaged Unit WGZ MODEL NUMBER CHILLER WATER CONNECTION SIZE (NOM) VICTAULIC CONDENSER WATER CONNECTION SIZE (NOM) VICTAULIC CENTER OF GRAVITY IN (MM) A IN (MM) X Y Z WGZ030C 2.5 (64) (2728) 4 (102) WGZ035C 2.5 (64) (2753) 4 (102) WGZ040C 2.5 (64) (2789) 4 (102) WGZ045C 2.5 (64) ( (102) WGZ050C 2.5 (64) (2878) 4 (102) WGZ055C 2.5 (64) (2921) 4 (102) WGZ060C 2.5 (64) (2965) 4 (102) IMM WGZC WGZ 030C through 200C 25

26 Figure 12, WGZ 070CW through WGZ 130CW L4 / M4 L3 / M3 WATER CONNECTIONS CONTROL BOX L1 / M1 L2 / M2 MICROTECH II USER INTERFACE CIRCUIT 2 CIRCUIT 1 "A" "W" INLET CONTROL CONNECTION.88 KNOCKOUTS ON OPPOSITE SIDE EVAPORATOR REMOVABLE DISC. HANDLE REMOVE BRKT. FOR SHIPPING ONLY VENT OUTLET OUTLET CONDENSER POWER CONNECTIONS " Y " "H" DRAIN "T" RELIEF VALVES "L" " X " INLET.88 KNOCKOUTS " Z " DIA MOUNTING HOLES (4) WGZ CW Packaged Chiller WGZ MODEL NUMBER MAXIMUM OVERALL DIMENSIONS IN (MM) L W H CHILLER WATER CONNECTION IN(MM) VICTAULIC SIZE (NOM) A CONDENSER WATER CONNECTION IN(MM) VICTAULIC SIZE (NOM) T CENTER OF GRAVITY X Y Z WGZ070C (3639) 35.0 (889) 65.5 (1664) 3 (76) (2918) 4 (102) 8.0 (203) WGZ080C (3799) 35.0 (889) 65.5 (1664) 3 (76) (2930) 4 (102) 14.3 (363) WGZ090C (3795) 35.0 (889) 65.5 (1664) 3 (76) (2975) 4 (102) 14.1 (359) WGZ100C (3795) 35.0 (889) 65.5 (1664) 3 (76) (2997) 4 (102) 14.1 (359) WGZ115C (3795) 35.0 (889) 65.5 (1664) 3 (76) (3088) 4 (102) 14.1 (359) WGZ130C (3795) 35.0 (889) 65.5 (1664) 3 (76) (3167) 4 (102) 14.1 (359) WGZ 030C through 200C IMM WGZC

27 Figure 13, WGZ 150CW through WGZ 200CW EVAPORATOR OUTLET EVAPORATOR INLET VENT CIRCUIT 2 CIRCUIT 1 MICROTECH II USER INTERFACE T.B.D CONTROL CONNECTION.88 KNOCKOUTS ON OPPOSITE SIDE REMOVABLE DISC HANDLE REMOVE BRKT. FOR SHIPPING ONLY VENT " Y " OUTLET CONDENSER POWER CONNECTIONS EVAP INLET/ OUTLET DRAIN DRAIN RELIEF VALVES " X " INLET.88 KNOCKOUT " Z " DIA MOUNTING HOLES (4) WGZ150CW-200CW Packaged Chiller WGZ MODEL NUMBER CHILLER WATER CONNECTION SIZE (NOM) VICTAULIC CONDENSER WATER CONNECTION SIZE (NOM) VICTAULIC CENTER OF GRAVITY IN (MM) IN (MM) X Y Z WGZ150C 8 (203) 5 (127) WGZ170C 8 (203) 5 (127) WGZ200C 8 (203) 5 (127) IMM WGZC WGZ 030C through 200C 27

28 Chillers with Remote Condenser Figure 14, WGZ 030CA through WGZ 060CA " A " INLET OUTLET CIRCUIT MICROTECH II USER INTERFACE CIRCUIT DISCHARGE CONNECTIONS.88 LIQUID CONNECTIONS CONTROL CONNECTION.88 KNOCKOUTS ON OPPOSITE SIDE INLET EVAPORATOR REMOVABLE DISC. HANDLE POWER CONNECTIONS OUTLET REMOVE BRKT. FOR SHIPPING ONLY LIQUID CONNECTIONS " Y " " X ".88 KNOCKOUTS " Z " ISOLATOR HOLES (4) EVAP. AND DISCHARGE CONNECTIONS WGZ CA REMOTE CONDENSER UNIT WGZ MODEL NUMBER CHILLER WATER CONNECTION SIZE (NOM) VICTAULIC CONDENSER WATER CONNECTION SIZE (NOM) VICTAULIC CENTER OF GRAVITY IN (MM) A IN (MM) X Y Z WGZ030CA 2.5 (64) 21.6 (550) 4 (102) WGZ035CA 2.5 (64) 20.6 (523) 4 (102) WGZ040CA 2.5 (64) 19.2 (488) 4 (102) WGZ045CA 2.5 (64) 17.5 (444) 4 (102) WGZ050CA 2.5 (64) 15.8 (400) 4 (102) WGZ055CA 2.5 (64) 14.0 (356) 4 (102) WGZ060CA 2.5 (64) 12.3 (312) 4 (102) WGZ 030C through 200C IMM WGZC

29 Figure 15, WGZ 070CA through WGZ 130CA L M4 CIRCUIT CIRCUIT 1 M L EVAP WATER CONNECTIONS CONTROL BOX L1 M1 %%c ISOLATOR HOLES IN THE BOTTOM OF THE BASE M2 L CONTROL CONNECTION.88 KNOCKOUTS ON OPPOSITE SIDE CIRCUIT 2 CIRCUIT 1 MICROTECH II USER INTERFACE REMOVABLE DISC. HANDLE POWER CONNECTIONS INLET EVAPORATOR OUTLET REMOVE BRKT. FOR SHIPPING ONLY LIQUID CONNECTIONS " T " " Y " " X " KNOCKOUTS " Z " ISOLATOR HOLES (4) EVAP. AND DISCHARGE CONNECTIONS WGZ CA Unit less condenser "A " INLET OUTLET ± ± DISCHARGE CONNECTIONS "B" LIQUID CONNECTIONS "C" WGZ MODEL NUMBER CHILLER WATER CONNECTION SIZE (NOM) VICTAULIC COND. WATER CONN. SIZE VICTAULIC REFRIGERANT PIPING CONNECTION SIZE T LEFT OVERHANG CENTER OF GRAVITY (IN.) IN (MM) A IN (MM) B DISC. C LIQ. X Y Z WGZ070C 3 (76) 14.1 (359) 4 (102) 1.38 OD 1.13 OD N/A WGZ080C 3 (76) 13.7 (348) 4 (102) 1.62 OD 1.13 OD 6.3 (161) WGZ090C 3 (76) 11.9 (303) 4 (102) 1.62 OD 1.13 OD 6.6 (167) WGZ100C 3 (76) 11.0 (280) 4 (102) 1.62 OD 1.13 OD 6.6 (167) WGZ115C 3 (76) 7.5 (190) 4 (102) 1.62 OD 1.13 OD 6.6 (167) WGZ130C 3 (76) 4.4 (111) 4 (102) 1.62 OD 1.13 OD 6.6 (167) IMM WGZC WGZ 030C through 200C 29

30 Figure 16, WGZ 150CA through WGZ 200CA L M CIRCUIT 2 M CIRCUIT 1 M L CONTROL BOX L1 M ISOLATOR HOLES IN THE BOTTOM OF THE BASE M2 M3 L2 CIRCUIT 2 CIRCUIT MICROTECH II USER INTERFACE REMOVABLE DISC. HANDLE CONTROL CONNECTION.88 KNOCKOUTS ON OPPOSITE SIDE " Y " POWER CONNECTIONS (QTY 3) REMOVE BRKT. FOR SHIPPING ONLY LIQUID CONNECTIONS " X ".88 KNOCKOUTS " Z " ISOLATOR HOLES (6) INLET OUTLET CIRCUIT 1 CIRCUIT O.D. DISCHARGE CONNECTIONS O.D. LIQUID CONNECTIONS DISCHARGE 60 CIRCUIT EVAPORATOR INLET/OUTLET DISCHARGE CIRCUIT 2 WGZ CA REMOTE CONDENSER UNIT WGZ MODEL NUMBER CHILLER WATER CONNECTION SIZE (NOM) VICTAULIC CENTER OF GRAVITY IN (MM) X Y Z WGZ150C 8 (203) WGZ170C 8 (203) WGZ200C 8 (203) WGZ 030C through 200C IMM WGZC

31 Physical Data Packaged Chillers Table 18, WGZ 030CW WGZ 055CW WGZ UNIT SIZE Unit ARI tons, (kw) 30.0 (105.5) 34.6 (121.7) 40.7 (143.1) 45.5 (160.0) 51.4 (180.8) 56.4 (198.4) No. Circuits COMPRESSORS Nominal Tons Number Per Circuit CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT Staging, Circuit #1 in Lead 25 / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 73 / 100 Staging, Circuit #2 in Lead 25 / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 77 / 100 Oil Charge per Compressor oz., (l) 85 (2.5) 110 (3.3) 110 (3.3) 110 (3.3) 110 (3.3) 110 (3.3) CONDENSER Number No. Refrigerant Circuits Diameter, in., (mm) 10 (254) 10 (254) 10 (254) 10 (254) 10 (254) 10 (254) Tube Length, in., (mm) 120 (3048) 120 (3048) 120 (3048) 120 (3048) 120 (3048) 120 (3048) Design W.P.PSIG, (kpa): Refrigerant Side 500 (3447) 500 (3447) 500 (3447) 500 (3447) 500 (3447) 500 (3447) Water Side 232 (1599) 232 (1599) 232 (1599) 232 (1599) 232 (1599) 232 (1599) Pump-Out Capacity, lb., (kg) (3) (111.7) (111.7) (103.7) (103.7) (93.4) (93.4) Conn.In & Out, in, (mm) Victaulic 4 (102) 4 (102) 4 (102) 4 (102) 4 (102) 4 (102) Relief Valve, Flare In., (mm) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) Purge Valve, Flare In., (mm) ½ (12.7) ½ (12.7) ½ (12.7) ½ (12.7) ½ (12.7) ½ (12.7) Vent & Drain, in. (mm) NPT ¼ (6.4) ¼ (6.4) ¼ (6.4) ¼ (6.4) ¼ (6.4) ¼ (6.4) Liquid Subcooling Integral Integral Integral Integral Integral Integral EVAPORATOR, BRAZED-PLATE Number No. Refrigerant Circuits Water Volume, gallons, (l) 1.9 (7.1) 2.2 (8.3) 2.4 (9.1) 2.9 (11.0) 3.4 (12.8) 3.7 (14.0) Refrig. Side D.W.P. Psig, (kpa) 450 (3102) 450 (3102) 450 (3102) 450 (3102) 450 (3102) 450 (3102) Water Side D.W.P,. psig, (kpa) 653 (4500) 653 (4500) 653 (4500) 653 (4500) 653 (4500) 653 (4500) Conn. In & Out, in. (mm) Victaulic 2.5 (65) 2.5 (65) 2.5 (65) 2.5 (65) 2.5 (65) 2.5 (65) Relief Valve, Flare in., (mm) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) Vent & Drain Field Field Field Field Field Field UNIT DIMENSIONS Length In., (mm) (3455) (3455) (3455) (3455) (3455) (3455) Width In., (mm) 32.8 (832) 32.8 (832) 32.8 (832) 32.8 (832) 32.8 (832) 32.8 (832) Height In., (mm) 63.4 (1609) 63.4 (1609) 63.4 (1609) 63.4 (1609) 63.4 (1609) 63.4 (1609) UNIT WEIGHTS Operating Weight, lb., (kg) 2486 (1128) 2572 (1167) 2631 (1193) 2650 (1202) 2752 (1248) 2771 (1257) Shipping Weight, lb., (kg) 2410 (1093) 2496 (1132) 2539 (1152) 2558 (1160) 2639 (1197) 2658 (1206) Cir # 1,Opn. Charge, lb.,(kg) R410a 45 (20.5) 45 (20.5) 47 (21.4) 47 (21.4) 47 (21.4) 50 (22.7) Cir # 2,Opn. Charge, lb.,(kg) R410a 45 (20.5) 45 (20.5) 47 (21.4) 47 (21.4) 47 (21.4) 50 (22.7) Notes: 1. Certified in accordance with ARI Standard 550/ % Full R-410a at 90 F (32 C) per unit. IMM WGZC WGZ 030C through 200C 31

32 Table 19, WGZ060CW - WGZ100CW WGZ UNIT SIZE Unit ARI tons, (kw) (1) 60.5 (212.8) 70.8 (249.0) 78.3 (275.4) 88.0 (309.5) 97.8 (344.0) No. Circuits COMPRESSORS Nominal Tons /20 15/ Number per Circuit CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT Staging, 4 Stages, Circuit #1 in Lead 25 / 50 / 75 / / 50 / 72 / / 50 / 75 / / 50 / 75 / / 50 / 75 / 100 Staging, 4 Stages, Circuit #2 in Lead 25 / 50 / 75 / / 50 / 72 / / 50 / 75 / / 50 / 75 / / 50 / 75 / 100 Oil Charge, per compressor oz. (l) 110 (3.3) 110 (3.3) 158 (4.7) 110 (3.3) 158 (4.7) 158 (4.7) 158 (4.7) 230 (6.8) 230 (6.8) CONDENSER Number No. Refrigerant Circuits Diameter, in. (mm) 10 (254) 14 (356) 14 (356) 14 (356) 14 (356) Tube Length, in. (mm) 120 (3048) 120 (3048) 120 (3048) 120 (3048) 120 (3048) Design W.P., psig (kpa): Refrigerant Side 500 (3447) 500 (3447) 500 (3447) 500 (3447) 500 (3447) Water Side 232 (1599) 232 (1599) 232 (1599) 232 (1599) 232 (1599) No. of Passes Pump-Out Capacity lb., (kg) (3) (93.4) (188.7) (180.7) (168.7) (156.7) Conn. In & Out, in., (mm) Victaulic 4 (102) 4 (102) 4 (102) 4 (102) 4 (102) Relief Valve, Flare in., (mm) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) Purge Valve, Flare in. (mm) ½ (12.7) ½ (12.7) ½ (12.7) ½ (12.7) ½ (12.7) Vent & Drain, in. (mm) NPT ¼ (6.4) ¼ (6.4) ¼ (6.4) ¼ (6.4) ¼ (6.4) Liquid Subcooling Integral Integral Integral Integral Integral EVAPORATOR, BRAZED-PLATE Number No. Refrigerant Circuits Water Volume, gallons (l) 4.2 (15.9) 6.4 (24.3) 6.6 (24.9) 7.5 (28.4) 8.0 (30.2) Refrigerant Side D.W.P., psig, (kpa) 450 (3102) 450 (3102) 450 (3102) 450 (3102) 450 (3102) Water Side D.W.P., psig, (kpa) 653 (4500) 653 (4500) 653 (4500) 653 (4500) 653 (4500) Conn. In & Out, in. (mm) Victaulic 2.5 (65) 3 (76) 3 (76) 3 (76) 3 (76) Relief Valve, Flare in., (mm) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) Vent & Drain Field Field Field Field Field UNIT DIMENSIONS Length, in. (mm) (3455) (3639) (3799) (3795) (3795) Width, in. (mm) 32.8 (832) 35.0 (889) 35.0 (889) 35.0 (889) 35.0 (889) Height, in. (mm) 63.4 (1609) 65.5 (1664) 65.5 (1664) 65.5 (1664) 65.5 (1664) UNIT WEIGHTS Operating Wt, lb., (kg) 2801 (1271) 3887 (1763) 4302 (1951) 4507 (2044) 4678 (2122) Shipping Wt, lb. (kg) 2688 (1219) 3746 (1699) 4145 (1880) 4327 (1963) 4474 (2029) Cir # 1,Opn. Charge, lb, (kg) R410a 50 (22.7) 74 (34.1) 80 (36.4) 80 (36.4) 90 (40.9) Cir # 2,Opn. Charge, lb.,(kg) R410a 50 (22.7) 74 (34.1) 80 (36.4) 80 (36.4) 90 (40.9) Notes: 1. Certified in accordance with ARI Standard 550/ Units WGZ030 to 130 have two parallel compressors per circuit. Units WGZ150 to 200 have three parallel compressors per circuit % Full R-410a at 90 F (32 C) per unit. 32 WGZ 030C through 200C IMM WGZC

33 Table 20, WGZ115CW - WGZ200CW WGZ UNIT SIZE Unit ARI. tons, (kw) (1) (397.1) (441.0) (515.6) (595.4) (661.5) No. Circuits COMPRESSORS Nominal Tons 26/30 26/ Number Per Circuit CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT Staging, 4 Stages, Circuit #1 in Lead 22 / 50 / 72 / / 50 / 75 / 100 Staging, 4 Stages, Circuit #2 in Lead 22 / 50 / 72 / / 50 / 75 / 100 Oil Charge, per compressor oz. (l) CONDENSER 230 (6.8 )/ 213 (6.3) 230 (6.8 )/ 213 (6.3) 17 / 33 / 50 / 67 / 83 / / 33 / 50 / / / 33 / 48 / 67 / 81 / / 33 / 52 / / / 33 / 50 / 67 / 83 / / 33 / 50 / 67 / 83 / (6.3) 230 (6.8) 230 (6.8) 213 (6.3) 213 (6.3) Number No. Refrigerant Circuits Diameter, in. (mm) 14 (356) 14 (356) 16 (406.4) 16 (406.4) 16 (406.4) Tube Length, in. (mm) 120 (3048) 120 (3048) 144 (3658) 144 (3658) 144 (3658) Design W.P., psig (kpa): Refrigerant Side 500 (3447) 500 (3447) 500 (3447) 500 (3447) 500 (3447) Water Side 232 (1599) 232 (1599) 232 (1599) 232 (1599) 232 (1599) Pump-Out Capacity lb., (kg) (3) (156.7) (156.7) (260.1) (231.3) (231.3) Water Conn In & Out, in., (mm) (4) 4 (102) 4 (102) 5 (127) 5 (127) 5 (127) Relief Valve, Flare in., (mm) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) Purge Valve, Flare in. (mm) ½ (12.7) ½ (12.7) ½ (12.7) ½ (12.7) ½ (12.7) Vent & Drain, in. (mm) FPT ¼ 6.4) ¼ 6.4) ¼ 6.4) ¼ 6.4) ¼ 6.4) Liquid Subcooling Integral Integral Integral Integral Integral EVAPORATOR, BRAZED-PLATE SHELL-AND-TUBE Number No. Refrigerant Circuits Water Volume, gallons (l) 8.5 (32.1) 10.5 (39.7) 57.6 (218.0) 56.9 (215.4) 56.9 (215.4) Refrigerant Side D.W.P., psig, (kpa) 450 (3102) 450 (3102) 450 (3102) 450 (3102) 450 (3102) Water Side D.W.P., psig, (kpa) 653 (4500) 653 (4500) 150 (1034) 150 (1034) 150 (1034) Water Conn.In & Out, in. (mm) Victaulic 3 (76) 3 (76) 8 (203) 8 (203) 8 (203) Relief Valve, Flare in., (mm) ⅝ (15.9) ⅝ (15.9) Drain & Vent size, in. (mm) Field Field ½ (12.7) ½ (12.7) ½ (12.7) UNIT DIMENSIONS Length, in. (mm) (3795) (3795) (4322) (4322) (4322) Width, in. (mm) 35.0 (889) 35.0 (889) 36.5 (927) 36.5 (927) 36.5 (927) Height, in. (mm) 65.5 (1664) 65.5 (1664) 77.7 (1973) 77.7 (1973) 77.7 (1973) UNIT WEIGHTS Operating Wt, lb., (kg) 4712 (2137) 4772 (2165) 7370 (3343) 7758 (3519) 7873 (3571) Shipping Wt, lb. (kg) 4508 (2045) 4568 (2072) 6581 (2985) 6921 (3139) 7036 (3192) Cir #1, Op. Charge, lb., (kg) R-410a 100 (45.5) 100 (45.5) 150 (68.2) 150 (68.2) 150 (68.2) Cir #2, Op. Charge, lb., (kg) R-410a 100 (45.5) 100 (45.5) 150 (68.2) 150 (68.2) 150 (68.2) Notes: 1. Certified in accordance with ARI Standard 550/ Units WGZ030 to 130 have two parallel compressors per circuit, units WGZ150 to 200 have three parallel compressors per circuit % Full R-410a at 90 F (32 C) per unit. IMM WGZC WGZ 030C through 200C 33

34 Chillers with Remote Condenser Table 21, WGZ030CA - WGZ055CA WGZ UNIT SIZE Tons, (kw), 44 F LWT, 125 F SDT 26.6 (93.5) 30.5 (107.3) 35.2 (123.8) 39.8 (139.9) 45.8 (161.0) 50.3 (176.8) No. Circuits COMPRESSORS Nominal Tons Number per Circuit Staging, Circuit #1 in Lead 25 / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 73 / 100 Staging, Circuit #2 in Lead 25 / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 75 / / 50 / 77 / 100 Oil Charge, per comp. oz, (l) 85 (2.5) 110 (3.3) 110 (3.3) 110 (3.3) 110 (3.3) 110 (3.3) EVAPORATOR, BRAZED PLATE No. Refrigerant Circuits Water Volume, gallons, (l) 1.9 (7.1) 2.2 (8.3) 2.4 (9.1) 2.9 (11.0) 3.4 (12.8) 3.7 (14.0) Refrig. Side D.W.P. Psig, (kpa) 450 (3102) 450 (3102) 450 (3102) 450 (3102) 450 (3102) 450 (3102) Water Side D.W.P. Psig, (kpa) 653 (4500) 653 (4500) 653 (4500) 653 (4500) 653 (4500) 653 (4500) Inlet & Outlet, in., (mm) (1) 2.5 (65) 2.5 (65) 2.5 (65) 2.5 (65) 2.5 (65) 2.5 (65) Relief Valve, Flare in., (mm) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) Drain & Vent Field Field Field Field Field Field UNIT DIMENSIONS Length In., (mm) (3480) (3480) (3480) (3480) (3480) (3480) Width In., (mm) 34.0 (864) 34.0 (864) 34.0 (864) 34.0 (864) 34.0 (864) 34.0 (864) Height In., (mm) 60.0 (1524) 60.0 (1524) 60.0 (1524) 60.0 (1524) 60.0 (1524) 60.0 (1524) UNIT WEIGHTS Operating Weight, lb., (kg) 1606 (728) 1698 (770) 1715 (778) 1738 (788) 1773 (804) 1795 (814) Shipping Weight, lb., (kg) 1580 (717) 1670 (758) 1685 (764) 1704 (773) 1735 (787) 1754 (796) Holding charge/ circuit, lb. (kg) 10.0 (4.5) 10.0 (4.5) 10.0 (4.5) 10.0 (4.5) 10.0 (4.5) 10.0 (4.5) Table 22, WGZ060CA - WGZ100CA WGZ UNIT SIZE Tons, (kw) 44 F LWT, 125 F SDT 53.9 (189.5) 61.3 (215.7) 68.6 (242.0) 77.7 (273.3) 86.6 (304.5) No. Circuits COMPRESSORS Nominal Tons /20 15/ Number Per Circuit Staging, Circuit #1 in Lead 25 / 50 / 75 / / 50 / 72 / / 50 / 75 / / 50 / 75 / / 50 / 75 / 100 Staging, Circuit #2 in Lead 25 / 50 / 75 / / 50 / 72 / / 50 / 75 / / 50 / 75 / / 50 / 75 / 100 Oil Charge, per compressor oz. (l) 110 (3.3) 110 (3.3) 158 (4.7) 158 (4.7) (6.8) EVAPORATOR, BRAZED PLATE No. Refrigerant Circuits Water Volume, gallons (l) 4.2 (15.9) 6.4 (24.3) 6.6 (24.9) 7.5 (28.4) 8.0 (30.2) Refrigerant Side D.W.P., psig, (kpa) 450 (3102) 450 (3102) 450 (3102) 450 (3102) 450 (3102) Water Side D.W.P., psig, (kpa) 653 (4500) 653 (4500) 653 (4500) 653 (4500) 653 (4500) Inlet & Outlet, in. (mm) (2) 2.5 (63) 3 (76) 3 (76) 3 (76) 3 (76) Relief Valve, Flare in., (mm) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) Drain & Vent Field Field Field Field Field UNIT DIMENSIONS Length, in. (mm) (3480) (3480) (3480) (3480) (3480) Width, in. (mm) 34.0 (864) 34.0 (864) 34.0 (864) 34.0 (864) 34.0 (864) Height, in. (mm) 60.0 (1524) 60.0 (1524) 60.0 (1524) 60.0 (1524) 60.0 (1524) UNIT WEIGHTS Operating Wt, lb., (kg) 1816 (824) 2474 (1122) 2787 (1264) 2928 (1328) 3050 (1383) Shipping Wt, lb. (kg) 1771 (803) 2406 (1091) 2717 (1232) 2851 (1293) 2968 (1346) Holding charge/ circuit, lb. (kg) 10.0 (4.5) 15 (6.8) 15 (6.8) 15 (6.8) 15 (6.8) Notes: 1. Condenser and field piping not included. 34 WGZ 030C through 200C IMM WGZC

35 Table 23, WGZ115CA WGZ200CA WGZ UNIT SIZE Tons, (kw)44 F LWT, 125 F SDT (352.2) (391.7) (456.8) (528.3) (599.8) No. Circuits COMPRESSORS Nominal Tons 26/30 26/ Number Per Circuit Staging, Circuit #1 in Lead 22 / 50 / 72 / / 50 / 75 / 100 Staging, Circuit #2 in Lead 22 / 50 / 72 / / 50 / 75 / / 33 / 50 / 67 / 83 / / 33 / 50 / 67 / 83 / / 33 / 48 / 67 / 81 / / 33 / 52 / 67 / 86 / / 33 / 50 / 67 / 83 / / 33 / 50 / 67 / 83 / 100 Oil Charge, per compressor oz. (l) 230 (6.8 ) 213 (6.3) 213 (6.3) 230 (6.8) 230 (6.8) 213 (6.3) 213 (6.3) EVAPORATOR, BRAZED PLATE SHELL-AND-TUBE No. Refrigerant Circuits Water Volume, gallons (l) 8.5 (32.1) 10.5 (39.7) 57.6 (218.0) 56.9 (215.4) 56.9 (215.4) Refrigerant Side D.W.P., psig, 450 (3102) 450 (3102) 450 (3102) 450 (3102) 450 (3102) Water Side D.W.P., psig, (kpa) 653 (4500) 653 (4500) 150 (1034) 150 (1034) 150 (1034) Water Connections: In & Out, in. (mm), victaulic 3 (76) 3 (76) 8 (203) 8 (203) 8 (203) Relief Valve, Flare in., (mm) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) ⅝ (15.9) Drain & Vent Field Field ½ (12.7) ½ (12.7) ½ (12.7) UNIT DIMENSIONS Length, in. (mm) (3480) (3480) (3912) (3912) (3912) Width, in. (mm) 34.0 (864) 34.0 (864) 34.0 (864) 34.0 (864) 34.0 (864) Height, in. (mm) 60.0 (1524) 60.0 (1524) 75.0 (1905) 75.0 (1905) 75.0 (1905) UNIT WEIGHTS Operating Wt, lb., (kg) 3120 (1415) 3194 (1449) 5279 (2395) 5385 (2443) 5498 (2494) Shipping Wt, lb. (kg) 3035 (1377) 3091 (1402) 4779 (2168) 4891 (2219) 5004 (2270) Holding charge/ circuit, lb. (kg) 15 (6.8) 15 (6.8) 20 (9.1) 20 (9.1) 20 (9.1) Notes: 1. Condenser and field piping not included Operating Limits Equipment room temperature limits, operating or standby: 32 F to 104 F (0 C to 40 C) Maximum allowable condenser water pressure is 232 psig (1599 kpa). Maximum design saturated discharge temperature is 140 F (60 C). Maximum allowable water temperature to cooler in a non-operating cycle is 100 F (37.8 C). Maximum entering water temperature for operating cycle is 90 F (32.2 C) (during system changeover from heating to cooling cycle). Minimum leaving water temperature from the cooler without freeze protection is 40 F (4.4 C). Minimum entering tower condenser water temperature is 60 F (15.6 C). For remote air-cooled condensers, the temperature difference between the saturated discharge temperature and the outside air temperature (TD) must be between 15 and 35 degrees F and the saturated discharge temperature cannot exceed 135 F. IMM WGZC WGZ 030C through 200C 35

36 Components Figure 17, Compressor Locations Evaporator Evaporator and Condenser Connections Circuit 2 Circuit 1 Control Panel NOTE: Models WGZ 150 to 200 add a #5 compressor to circuit #1 and a #6 compressor to circuit #2. Table 24, Major Components WGZ-C Unit System #1 System #2 Evap. Vessel Cond. Vessel Expansion Valve Size Comp. #1 Comp. #3 Comp. #2 Comp. #4 Size Size System #1 System #2 30 ZP90KCE ZP90KCE ZP90KCE ZP90KCE ACH130-90DQ C OZE-20-GA-BP15 OZE-20-GA-BP15 35 ZP103KCE ZP103KCE ZP103KCE ZP103KCE ACH DQ C OZE-20-GA-BP15 OZE-20-GA-BP15 40 ZP120KCE ZP120KCE ZP120KCE ZP120KCE ACH130118DQ C OZE-20-GA-BP15 OZE-20-GA-BP15 45 ZP137KCE ZP137KCE ZP137KCE ZP137KCE ACH DQ C OZE-25-GA-BP15 OZE-25-GA-BP15 50 ZP154KCE ZP154KCE ZP154KCE ZP154KCE ACH DQ C OZE-25-GA-BP15 OZE-25-GA-BP15 55 ZP154KCE ZP154KCE ZP182KCE ZP182KCE ACH DQ C OZE-25-GA-BP15 OZE-35-GA-BP15 60 ZP182KCE ZP182KCE ZP182KCE ZP182KCE ACH DQ C OZE-35-GA-BP15 OZE-35-GA-BP15 70 ZP182KCE ZP235KCE ZP182KCE ZP235KCE ACH DQ C OZE-35-GA-BP15 OZE-35-GA-BP15 80 ZP235KCE ZP235KCE ZP235KCE ZP235KCE ACH DQ C OZE-50-GA-BP15 OZE-50-GA-BP15 90 ZP235KCE ZP235KCE ZP295KCE ZP295KCE ACH DQ C OZE-50-GA-BP15 OZE-50-GA-BP ZP295KCE ZP295KCE ZP295KCE ZP295KCE ACH DQ C OZE-50-GA-BP15 OZE-50-GA-BP ZP295KCE ZP385KCE ZP295KCE ZP385KCE ACH DQ C OZE-60-GA-BP15 OZE-60-GA-BP ZP385KCE ZP385KCE ZP385KCE ZP385KCE ACH DQ C OZE-60-GA-BP15 OZE-60-GA-BP (3) ZP295KCE (3) ZP295KCE EV /9NS C SEHI S SEHI S 170 (3) ZP295KCE (3) ZP385KCE EV /7NS C SEHI S SEHI S 200 (3) ZP385KCE (3) ZP385KCE EV /7NS C SEHI S SEHI S WGZ 030C through 200C IMM WGZC

37 Wiring Field Wiring, Power The WGZ C vintage chillers are supplied standard with compressor contactors and power terminal block, designed for multi-point power supply to the unit, no compressor circuit breakers. Available options are: Single-point connection to power block with compressor circuit breakers Single-point connection to disconnect switch with compressor circuit breakers High short circuit current rating with single-point disconnect switch Multi-point connection to disconnect switch, no compressor circuit breakers A factory installed control circuit transformer is standard. Optionally, a field-installed control power source can be wired to the unit. Wiring and conduit selections must comply with the National Electrical Code and/or local requirements. An open fuse indicates a short, ground, or overload. Before replacing a fuse or restarting a compressor, the trouble must be found and corrected. Tables in the Electrical Data section (page 39) give specific information on recommended wire sizes. Unit power inlet wiring must enter the control box through the right side. A 7/8-inch pilot knockout is provided. (Refer to control panel picture on page 56 for general location of power inlet.) NOTE: Use only copper supply conductors. Terminations are sized for copper only. Field Wiring, Control A factory-mounted control transformer supplies the correct control circuit voltage. The transformer power leads are connected to the power block PB1 or disconnect switch DS1. Interlock Wiring, Condenser Pump Starter or Air Cooled Condenser Fan Starter Provisions are made for interlocking a condenser pump starter, tower fans, a tower bypass valve, or up to eight air-cooled condenser fan contactors to be controlled by the MicroTech II unit controller. Condenser fan operation can also be controlled by pressure switches supplied with the condenser. Coil voltage must be 115 volts with a maximum of 20 VA. An evaporator and condenser (water-cooled units only) flow switch is necessary on all units. It is also advisable to wire a chilled water pump interlock in series with the flow switch for additional freeze protection. Control wiring must enter the control box through a 7/8-inch knockout provided on the panel upper left side. Ambient Air Sensor Units with a remote air-cooled condenser will have an outdoor air sensor furnished with the unit, inside the control panel and wired to the correct terminals. It must be installed outdoors in a location that will give the true outdoor temperature that the condenser coils will see. Splicing of the sensor lead may be required. The sensor must be installed for the unit to operate. Optional Remote Interface Panel The box containing the optional remote interface panel will have installation instructions, IOM- MT II Remote, in it. IMM WGZC WGZ 030C through 200C 37

38 Unit Configuration WGZ 030CW to 130CW have two refrigerant circuits, two tandem scroll compressors (total of four), a single two-circuited brazed plate evaporator, a single two-circuited water-cooled condenser, interconnecting refrigerant piping and a control panel with associated sensors and transducers. Models WGZ 150CW to 200CW have two trio-compressors (total of 6) and a shell-and-tube evaporator. Table 25, Schematic Piping Diagram (One of Two Circuits) T P S Chilled Water LWT Evaporator P 1 Comp #1 Comp #2 CV Condenser Condenser Water S S F-D S T NOTE: Standard condenser connections are on the control panel end. Legend: T Temperature Sensor Relief Valve TP Pressure Transducer TS Schrader Fitting P 1 Pressure (High Pressure Cutout) Thermal Expansion Valve LWT S Temperataure Sensor, Leaving Chilled Water Control Solenoid Valve CV Sight Glass / Moisture Indicator Charging Valve Angle Valve F-D Filter-Drier Ball Valve WGZ 030C through 200C IMM WGZC

39 Electrical Data Table 26, Compressor Amp Draw WGZ Unit Size Volts Rated Load Amps Per Compressor Rated Load Amps Per Compressor Locked Rotor Amps Standard Unit w/o Ext. OL's Optional Unit with Ext. OL's Across-The-Line Starting Circuit 1 Circuit 2 Circuit 1 Circuit 2 Circuit 1 Circuit 2 No.1 No.3 No.5 No.2 No.4 No.6 No.1 No.3 No.5 No.2 No.4 No.6 No.1 No.3 No.5 No.2 No.4 No n/a n/a - n/a n/a n/a n/a - n/a n/a n/a n/a - n/a n/a IMM WGZC WGZ 030C through 200C

40 Table 26, Compressor Amp Draw, Continued WGZ Unit Size Volts Rated Load Amps Per Compressor Rated Load Amps Per Compressor Locked Rotor Amps Standard Unit w/o Ext. OL's Optional Unit with Ext. OL's Across-The-Line Starting Circuit 1 Circuit 2 Circuit 1 Circuit 2 Circuit 1 Circuit 2 No.1 No.3 No.5 No.2 No.4 No.6 No.1 No.3 No.5 No.2 No.4 No.6 No.1 No.3 No.5 No.2 No.4 No NOTES: 1. Compressor RLA values are for wire sizing purposes only and do not reflect normal operating current draw. 2. External compressor overloads only available on packaged water-cooled units, except Models WGZ 030CW 575V Table 27, Maximum Fuse Size WGZ Unit Size Maximum Fuse Size Single Point Multiple Point Voltage 3-Phase Power Supply Power Supply Power Supply Power Supply without Ext. OL's with Ext. OL's Without Ext. OL's With External OL's Total Unit Total Unit Circ.#1 Circ.#2 Circ.#1 Circ.# N/A N/A N/A N/A N/A N/A N/A N/A N/A WGZ 030C through 200C IMM WGZC

41 Table 27, Maximum Fuse Size, Continued WGZ Unit Size 050 Voltage 3-Pha Single Point Multiple Point Power Supply Power Supply Power Supply Power Supply without Ext. OL's with Ext. OL's Without Ext. OL's With External OL's Total Unit Total Unit Circ.#1 Circ.#2 Circ.#1 Circ.# NOTE :"Maximum Fuse Sizes" are selected at approximately 225% of the largest compressor RLA, plus 100% of all other loads. IMM WGZC WGZ 030C through 200C 41

42 Table 28, Wire Sizing Amps, Single Point Power WGZ Unit Size Volts Minimum Circuit Ampacity (MCA) Single Point Single Point Power Supply Power Supply Without Ext OL's (Note #3) Field Wire Power Supply Wire Gauge Field Wire Power Supply Wire Gauge 75 C Quantity 75 C With Ext OL's Quantity (Note #3) Without External OL's With External Overloads #1 3 # #1 3 # #6 (Note 1) 3 #6 (Note N/A 3 #6 (Note #1 3 # #1 3 # #6 (Note 1 3 #6 (Note N/A 3 #6 (Note /0 3 # /0 3 # #6 (Note 1 3 #6 (Note N/A 3 #6 (Note /0 3 # /0 3 # #4 3 #6 (Note #6 (Note 1 3 #6 (Note /0 3 2/ /0 3 1/ #3 3 # #4 3 #6 (Note /0 3 2/ /0 3 2/ #2 3 # #3 3 #6 (Note / / #2 3 # #2 3 # / / #1 3 # #2 3 # / #1 3 # #2 3 # /0 3 # #1 3 #3 Continued next page. WGZ 030C through 200C IMM WGZC

43 Table 28, Wire Sizing Amps, Single Point Power, Continued WGZ Unit Size Volts Minimum Circuit Ampacity (MCA) Power Supply Power Supply Single Point Power Supply Without Ext OL's (Note #3) Single Point Power Supply With Ext OL's (Note #3) Field Wire Quantity Wire Gauge 75 C Without External OL's Field Wire Quantity Wire Gauge 75 C With External Overloads /0 3 # /0 3 # (2) 4/ (2) 4/ /0 3 1/ /0 3 # (2) (2) / /0 3 1/ (2) (2) 4/ (2) / /0 3 1/ (2) (2) (2) (2) 4/ / / (2) (2) (2) (2) /0 NOTES: 1. Field wire size must be #4 AWG if High Interrupt Switch or HSCCR is ordered 2. Unit wire sizing amps (MCA) are equal to 125% of the largest compressor-motor RLA plus 100% of RLA of all other loads in the circuit. 3. Single point power supply requires a single fused disconnect to supply electrical power to the unit. 4. Multiple point power supply requires two independent power supplies, each with separate fused disconnects. The control circuit will be wired to Circuit #1 from the factory). IMM WGZC WGZ 030C through 200C 43

44 Table 29, Wire Sizing, Multi-point Power WGZ Unit Size Volts Minimum Circuit Ampacity (MCA) Power Supply Without External OL's Power Supply With External OL's Without Ext OL's With External OL's Field Wire Gauge, 75C Field Wire Gauge,75C Circuit Circuit Circuit Circuit Wire Circuit Circuit Wire Circuit Circuit No.1 No.2 No.1 No.2 Quantity No.1 No.2 Quantity No.1 No #4 #4 3 #6 # #4 #4 3 #8 # #10 #10 3 #10 # N/A N/A 3 #10 # #4 #4 3 #6 # #4 #4 3 #6 # #8 #8 3 #10 # N/A N/A 3 #10 # #4 #4 3 #6 # #4 #4 3 #6 # #8 #8 3 #10 # N/A N/A 3 #10 # #2 #2 3 #4 # #2 #2 3 #6 # #8 #8 3 #10 # #10 #10 3 #10 # #1 #1 3 #4 # #1 #1 3 #4 # #6 #6 3 #8 # #8 #8 3 #10 # #1 #1 3 #4 # #1 #1 3 #4 # #6 #6 3 #8 # #8 #6 3 #10 # #1 #1 3 #3 # #1 #1 3 #3 # #6 #6 3 #8 # #6 #6 3 #8 # /0 1/0 3 #2 # /0 1/0 3 #2 # #6 #6 3 #6 # #6 #6 3 #8 # /0 2/0 3 #1 # /0 2/0 3 #2 # #4 #4 3 #6 # #6 #6 3 #8 # /0 4/0 3 #1 1/ /0 4/0 3 #2 1/ #4 #3 3 #6 # #6 #4 3 #8 # /0 4/0 3 1/0 1/ /0 4/0 3 1/0 1/ #3 #3 3 #4 # #4 #4 3 #6 # /0 4/0 3 2/0 2/ /0 4/0 3 2/0 2/ #2 #2 3 #4 # #3 #3 3 #6 #6 Continued next page. 44 WGZ 030C through 200C IMM WGZC

45 Table 30, Wire Sizing, Multi-point Power, Continued WGZ Unit Size Minimum Circuit Ampacity (MCA) Power Supply Without External OL's Power Supply With External OL's Volts Without Ext OL's With External OL's Field Wire Gauge, 75 C Field Wire Gauge,75 C Circuit Circuit Circuit Circuit Wire Circuit Circuit Wire Circuit Circuit No.1 No.2 No.1 No.2 Quantity No.1 No.2 Quantity No.1 No /0 3/ /0 3/ #1 #1 3 #3 # #2 #2 3 #4 # /0 4/ /0 3/ /0 1/0 3 #3 # #2 #2 3 #4 # / / /0 3/0 3 #3 # #2 2/0 3 #4 # /0 3/0 3 #1 # /0 2/0 3 #2 #2 NOTES 1. Unit wire sizing amps are equal to 125% of the largest compressor-motor RLA plus 100% of the other compressor RLA's Multiple Point power supply requires a separate fused disconnect for each circuit to supply electrical power to the unit. 3. External Compressor Overload option is only available with packaged units with water-cooled condenser... IMM WGZC WGZ 030C through 200C 45

46 Table 31, Single Point Connection Sizing, Without External Overloads WGZ Unit Size Volts Factory-Installed Power Block Power Block or Bus Bar Lugs Size [2] Connection Wire Range CU [3] Factory-Installed HSCCR Disconnect Switch (Circuit Breaker) Switch Size [2] Connection [3] Wire Range - CU Factory-Installed, Molded Case Disconnect Switch Switch Size [2] Connection [3] Wire Range - CU (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) #4 400 (2) 500-3/0 250 (1) # (1) #4 400 (2) 500-3/0 250 (1) # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) #4 400 (2) 500-3/0 250 (1) # (1) #4 400 (2) 500-3/0 250 (1) # (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) #4 400 (2) 500-3/0 250 (1) # (1) #4 400 (2) 500-3/0 250 (1) # (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) 2/0 - # (2) 500-3/0 250 (1) # (1) 2/0 - # (1) #4 250 (1) # (1) #4 800 (4) (2) 500-3/ (1) #4 800 (4) (2) 500-3/ (1) #4 400 (2) 500-3/0 250 (1) # (1) 2/0 - # (1) #4 250 (1) # (2) #4 800 (2) 500- #1 (Note #1) 600 (2) 500-3/ (2) #4 800 (2) 500- #1 (Note #1) 600 (2) 500-3/ (1) #4 400 (2) 500-3/0 250 (1) # (1) #4 400 (2) 500-3/0 250 (1) # (2) #4 800 (4) (2) 500-3/ (2) #4 800 (4) (2) 500-3/ (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 400 (2) 500-3/0 250 (1) #4 Continued next page. 46 WGZ 030C through 200C IMM WGZC

47 Single Point Connection Sizing, Without External Overloads, Continued WGZ Unit Size Volts Factory-Installed Power Block Power Block or Bus Bar Lugs Size [2] See Note below Connection Wire Range CU [3] Factory-Installed HSCCR Disconnect Switch Circuit Breaker Switch Size [2] Connection [3] Wire Range - CU Factory-Installed Disconnect Switch Molded Case Switch Size [2] Connection [3] Wire Range - CU (2) #4 n/a (4) (2) #4 n/a (4) (1) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) #4 400 (2) 500-3/0 250 (1) # (2) #4 n/a (4) (2) #4 n/a (4) (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (2) #4 n/a (4) (2) #4 n/a (4) (1) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) #4 600 (2) 500-3/0 400 (2) 500-3/0 NOTES: 1. The disconnect has special lugs 2. Unit wire sizing amps are equal to 125% of the largest compressor-motor RLA plus 100% of the other compressor RLA's. 3. Single Point power supply requires a single fused disconnect to supply electrical electrical power to the unit 4. External Compressor Overload Option is only available with Packaged Units with Water Cooled Condenser. 5. Size" is the maximum amperage rating for the terminals or the main electrical device. 6. "Connection" is the range of wire sizes that the terminals on the electrical device will accept. Table 32, Single Point Connection Sizing, With External Overloads- WGZ Unit Size Volts Factory Installed Power Block Power Block or Bus Bar Lugs Size [2,5]) Connection Wire Range CU [6] Factory Installed HSCCR Disconnect Switch Circuit Breaker Switch Size [2,5] Connection Wire Range CU [6] Factory Installed Disconnect Switch Molded Case Switch Size [2,5] Connection Wire Range CU [6] (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) 2/0 - # (1) #4 100 (1) 1/0 - # n/a - n/a - n/a (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) 2/0 - # (1) #4 100 (1) 1/0 - # n/a - n/a - n/a (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) 2/0 - # (1) #4 100 (1) 1/0 - # n/a - n/a - n/a (1) #4 250 (2) 500- #1 250 (1) # (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) #4 400 (2) 500- #4 (Note #1) 250 (1) # (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) 2/0 - # (1) #4 100 (1) 1/0 - #10 Continued next page. IMM WGZC WGZ 030C through 200C 47

48 WGZ Unit Size Volts Factory Installed Power Block Power Block or Bus Bar Lugs Size [2,5]) Connection Wire Range CU [6] Factory Installed HSCCR Disconnect Switch (Circuit Breaker) Switch Size [2,5] Connection Wire Range CU [6] Factory Installed, Molded Case Disconnect Switch Switch Size [2,5] Connection Wire Range CU [6] (1) #4 400 (2) 500- #4 (Note #1) 250 (1) # (1) #4 400 (2) 500- #4 (Note #1) 250 (1) # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) #4 400 (2) 500-3/0 250 (1) # (1) #4 400 (2) 500- #4 (Note #1) 250 (1) # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) #4 400 (2) 500-3/0 250 (1) # (1) #4 400 (2) 500-3/0 250 (1) # (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 400 (2) 500-3/0 250 (1) # (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) #4 400 (2) 500-3/0 250 (1) # (1) 2/0 - # (1) #4 125 (1) 3/0- # (1) 2/0 - # (1) #4 100 (1) 1/0 - # (1) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) #4 125 (1) 3/0- # (2) #4 600 (2) 500-3/0 400 (2) 500-3/ (2) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) #4 250 (1) #4 250 (1) # (1) #4 250 (1) #4 125 (1) 3/0- # (2) #4 600 (2) 500-3/0 400 (2) 500-3/ (2) #4 600 (2) 500-3/0 400 (2) 500-3/ (1) #4 400 (2) 500-3/0 250 (1) # (1) #4 250 (1) #4 250 (1) # (2) #4 800 (2) 500- #1 (Note #1) 600 (2) 500-3/ (2) #4 800 (4) (2) 500-3/ (1) #4 400 (2) 500-3/0 250 (1) # (1) #4 250 (1) #4 250 (1) # (2) #4 800 (4) (2) 500-3/ (2) #4 800 (2) 500- #1 (Note #1) 600 (2) 500-3/ (1) #4 400 (2) 500-3/0 250 (1) # (1) #4 400 (2) 500- #4 (Note #1) 250 (1) # (2) #4 n/a (2) 500-3/ (2) #4 800 (4) (2) 500-3/ (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 400 (2) 500-3/0 250 (1) #4 NOTES: 1. The disconnect has special lugs. 2. Unit wire sizing amps are equal to 125% of the largest compressor-motor RLA plus 100% of the other compressor RLA's. 3. Single Point power supply requires a single fused disconnect to supply electrical power to the unit 4. External Compressor Overload Option is only available with Packaged Units with Water Cooled Condenser. 5. Size" is the maximum amperage rating for the terminals or the main electrical device. 6. "Connection" is the range of wire sizes that the terminals on the electrical device will accept. 48 WGZ 030C through 200C IMM WGZC

49 Figure 18, Multi- Point Connection Sizing, Without External Overloads Power Terminal Block Factory Installed Disconnect WGZ Unit Size Volts Size (1) -Circuit #1 Circuit #2 Circuit #1 Circuit #2 Power Block or Bus Bar Lugs Connection (2) Wire Range Size (1) Power Block or Bus Bar Lugs Connection (2) Wire Range Switch Size (1) Molded Case Connection (2) Wire Range - Copper Switch Size (1) Molded Case Connection (2) Wire Range - Copper #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 125 (1) 3/0- #3 125 (1) 3/0- # #14-2/0 175 #14-2/0 125 (1) 3/0- #3 125 (1) 3/0- # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 125 (1) 3/0- #3 125 (1) 3/0- # #14-2/0 175 #14-2/0 125 (1) 3/0- #3 125 (1) 3/0- # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 125 (1) 3/0- #3 250 (1) # #14-2/0 175 #14-2/0 125 (1) 3/0- #3 250 (1) # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 250 (1) #4 250 (1) # #14-2/0 175 #14-2/0 250 (1) #4 250 (1) # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 250 (1) #4 250 (1) # #14-2/0 175 #14-2/0 250 (1) #4 250 (1) # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # #14-2/0 175 #14-2/0 100 (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - #10 Continued next page. IMM WGZC WGZ 030C through 200C 49

50 Figure 19, Multi- Point Connection Sizing, Without External Overloads, Continued Power Terminal Block Factory Installed Disconnect WGZ Unit Size Volts Size (1) -Circuit #1 Circuit #2 Circuit #1 Circuit #2 Power Block or Bus Bar Lugs Connection (2) Wire Range Size (1) Power Block or Bus Bar Lugs Connection (2) Wire Range Switch Size (1) Molded Case Connection (2) Wire Range - Copper Switch Size (1) Molded Case Connection (2) Wire Range - Copper (1) #4 380 (1) #4 250 (1) #4 250 (1) # (1) #4 380 (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) #4 380 (1) #4 250 (1) #4 250 (1) # (1) #4 380 (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 125 (1) 3/0- # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) #4 380 (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 380 (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) 2/0 - # (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 125 (1) 3/0- # (1) #4 380 (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 380 (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) 2/0 - # (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 125 (1) 3/0- # (1) #4 380 (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 380 (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) 2/0 - # (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 250 (1) # (1) #4 380 (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 380 (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 380 (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) #4 250 (1) #4 NOTES: 1. Unit wire sizing amps are equal to 125% of the largest compressor-motor RLA plus 100% of the other compressor RLA's. 2. Multiple-Point power supply requires a separate fused disconnect for each circuit to supply electrical power to the unit 3. External Compressor Overload Option is only available with packaged units with water cooled condenser "Size" is the maximum amperage rating for the terminals or the main electrical device. 6. "Connection" is the range of wire sizes that the terminals on the electrical device will accept. 50 WGZ 030C through 200C IMM WGZC

51 Table 33, Multi- Point Connection Sizing, With External Overloads NOTE: (x) indicates note number. WGZ Unit Size Volts Power Block or Bus Bar Lug Size (1) Power Terminal Block Factory Installed Disconnect Switch -Circuit #1 -Circuit #2 Circuit.#1 Circuit.#2 Connection (2) Wire Range Power Block or Bus Bar Lugs Size (1) Connection (2) Wire Range Switch Size (1) Molded Case Connection (2) Wire Range - Copper Switch Size (1) Molded Case Connection (2) Wire Range - Copper (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # n/a - n/a - n/a - n/a (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # n/a - n/a - n/a - n/a (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # n/a - n/a - n/a - n/a (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 3/0- # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 125 (1) 3/0- # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 125 (1) 3/0- # (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 125 (1) 3/0- # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 125 (1) 3/0- # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - #10 Continued next page. IMM WGZC WGZ 030C through 200C 51

52 Table 34, Multi- Point Connection Sizing, With External Overloads, Continued WGZ Unit Size Volts Power Block or Bus Bar Lugs Size (1) Power Terminal Block Factory Installed Disconnect Switch -Circuit #1 -Circuit #2 Circuit.#1 Circuit.#2 Connection (2) Wire Range Power Block or Bus Bar Lugs Size (1) Connection (2) Wire Range Switch Size (1) Molded Case Connection (2) Wire Range - Copper Switch Size (1) Molded Case Connection (2) Wire Range - Copper (1) #4 380 (4) (1) #4 250 (1) #4 250 (1) # (1) #4 380 (4) (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) #4 380 (1) #4 250 (1) #4 250 (1) # (1) #4 380 (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) #4 380 (1) #4 250 (1) #4 250 (1) # (1) #4 380 (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) #4 380 (1) #4 250 (1) #4 250 (1) # (1) #4 380 (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 125 (1) 3/0- # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 1/0 - # (1) #4 380 (1) #4 250 (1) #4 400 (2) 500-3/ (1) #4 380 (1) #4 250 (1) #4 400 (2) 500-3/ (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 1/0 - # (1) 3/0- # (1) #4 380 (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 380 (1) #4 400 (2) 500-3/0 400 (2) 500-3/ (1) #4 380 (4) (1) #4 250 (1) #4 250 (1) # (1) 2/0 - # (1) 2/0 - # (1) 3/0- #3 125 (1) 3/0- #3 NOTES: 1. Unit wire sizing amps are equal to 125% of the largest compressor-motor RLA plus 100% of the other compressor RLA's. 2. Multiple Point power supply requires a separate fused disconnect for each circuit to supply electrical power to the unit 3. External Compressor Overload Option is only available with Packaged Units with Water Cooled Condenser. Electrical Notes Notes for Electrical Data Single Point Power: 1. If a separate 115V power supply is used for the control circuit, then the wire sizing amps is 10 amps for all unit sizes. 2. Recommended power lead wire sizes for 3 conductors per conduit are based on 100% conductor ampacity in accordance with NEC. Voltage drop has not been included. Therefore, it is recommended that power leads be kept short. All terminal block connections must be made with copper wire. 3. The recommended power lead wire sizes are based on an ambient temperature of 86 F (30 C). Ampacity correction factors must be applied for other ambient temperatures. Refer to the National Electrical Code Handbook. 4. Must be electrically grounded according to national and local electrical codes. 52 WGZ 030C through 200C IMM WGZC

53 Voltage Limitations: 1. Within ± 10 percent of nameplate rating 2. Voltage unbalance not to exceed 2% with a resultant current unbalance of 6 to 10 times the voltage unbalance per NEMA MG-1, 1998 Standard. This is an important restriction that must be adhered to. Notes for Field Wiring Data 1. Requires a single disconnect to supply electrical power to the unit. This power supply must either be fused or use a circuit breaker. 2. All field wiring to unit power block or optional non-fused disconnect switch must be copper. 3. All field wire size values given in table apply to 75 C rated wire per NEC. Supplemental Overloads Option Supplemental overloads option is used to reduce the required electrical service size and wire sizing to the water cooled version of WGZ chillers. The overloads reduce the electrical ratings for the compressor because water-cooled duty is less severe than air cooled duty. The overload option is only available for models with water-cooled condensers (not WGZ-CA models with air-cooled condensers). Standard Panel Ratings (ka) Voltage WGZ-C Model Size WGZ WGZ WGZ Optional Panel Ratings (ka) Voltage Options, Single-Point Power Connection Only High Short Circuit Current High Interrupt Rating Disconnect Switch NOTE High Short Circuit Current Rating (HSCCR) provides all panel components rated per above table and is so labeled. High Interrupt Disconnect Switch provides for only a disconnect switch with the rating, and the panel has no special labeling. Circuit Breakers The circuit breaker used in the High Short Circuit panel option may have a higher trip rating than the unit Maximum Overload Protection (MOP) value shown on the unit nameplate. The circuit breaker is installed as a service disconnect switch and does not function as branch circuit protection, mainly that the protection device must be installed at the point of origin of the power wiring. The breaker (disconnect switch) is oversized to avoid nuisance trips at high ambient temperature conditions IMM WGZC WGZ 030C through 200C 53

54 Field Wiring Diagram Figure 20, WGZ 030CW 200CW Field Wiring Diagram 3 PHASE POWER SUPPLY DISCONNECT (BY OTHERS) UNIT MAIN TERMINAL BLOCK GND LUG TO COMPRESSOR(S) AND FAN MOTORS NOTE: ALL FIELD WIRING TO BE INSTALLED AS NEC CLASS 1 WIRING SYSTEM WITH CONDUCTOR RATED 600 VOLTS FUSED CONTROL CIRCUIT TRANSFORMER OPTION 120 VAC FIELD SUPPLIED OPTION N 120VAC CONTROL POWER DISCONNECT (BY OTHERS) 10A FUSE (BY OTHERS) CHW PUMP RELAY (BY OTHERS) 120 VAC 1.0 AMP MAX TB TB1-20 N CONTROL CIRCUIT FUSE 120 VAC CONTROLLER ALARM FACTORY SUPPLIED ALARM FIELD WIRED TOWER FAN #2 COIL (BY OTHERS) BELL 120 VAC 1.0 AMP MAX OPTION 10 ALARM BELL RELAY 15 TIME CLOCK AUTO OFF TB2 REMOTE STOP ON SWITCH 40 (BY OTHERS) MANUAL 53 AUTO OFF 42 ICE MODE SWITCH (BY OTHERS) ON CDW PUMP RELAY (BY OTHERS) 120 VAC 1.0 AMP MAX TOWER FAN #1 COIL (BY OTHERS) 120 VAC 1.0 AMP MAX TB3-90 J15-NO8 TB1-12 TB3-91 J16-NO9 TB1-12 TB3-92 J16-NO GND N N 120 VAC 120 VAC 120 VAC 120 VAC IF REMOTE STOP 897 CONTROL IS USED, REMOVE LEAD 897 FROM TERM. 40 TO 53. ALARM BELL RELAY COM NO BELL 1 2 ALARM BELL OPTION CHW FLOW SWITCH ---MANDATORY - (BY OTHERS) CDW FLOW SWITCH ---MANDATORY - (BY OTHERS) MANUAL NOR. OPEN PUMP AUX. CONTACTS (OPTIONAL) NOR. OPEN PUMP AUX. CONTACTS (OPTIONAL) 4-20MA FOR EVAP. WATER RESET (BY OTHERS) MA FOR DEMAND LIMIT (BY OTHERS) + - COOLING TOWER BYPASS (BY OTHERS) COOLING TOWER BYPASS (BY OTHERS) TB GND N N 0-10 VDC 0-10 VDC LESS EVAPORATOR ONLY LIQUID LINE #1 SOLENOID 24 VAC 1.5 AMP MAX. LIQUID LINE #2 SOLENOID 24 VAC 1.5 AMP MAX. HOT GAS BYPASS #1 SOLENOID 24 VAC 1.0 AMP MAX. HOT GAS BYPASS #2 SOLENOID 24 VAC 1.0 AMP MAX N N N N 24 VAC 24 VAC 24 VAC 24 VAC FIELD WIRING FOR WGZ C PACKAGE/ WITH CONDENSER WITH MICROTECH CONTROLLER DWG REV.0D 54 WGZ 030C through 200C IMM WGZC

55 Figure 21, WGZ 030CA 200CA Field Wiring Diagram (Remote Condenser) 3 PHASE POWER SUPPLY DISCONNECT (BY OTHERS) UNIT MAIN TERMINAL BLOCK GND LUG TO COMPRESSOR(S) AND FAN MOTORS NOTE: ALL FIELD WIRING TO BE INSTALLED AS NEC CLASS 1 WIRING SYSTEM WITH CONDUCTOR RATED 600 VOLTS FUSED CONTROL CIRCUIT TRANSFORMER OPTION 120 VAC REMOTE STOP SWITCH (BY OTHERS) ICE MODE SWITCH (BY OTHERS) CHW FLOW SWITCH ---MANDATORY - (BY OTHERS) FIELD SUPPLIED OPTION N 120VAC CONTROL POWER FACTORY SUPPLIED ALARM FIELD WIRED ALARM BELL OPTION ALARM BELL RELAY TIME CLOCK AUTO ON AUTO OFF MANUAL ON OFF MANUAL 4-20MA FOR CHW RESET (BY OTHERS) DISCONNECT (BY OTHERS) NOR. OPEN PUMP AUX. CONTACTS (OPTIONAL) A FUSE (BY OTHERS) CHW PUMP RELAY (BY OTHERS) 120 VAC 1.0 AMP MAX TB TB TB1-20 GND 897 N CONTROL CIRCUIT FUSE 120 VAC 120 VAC IF REMOTE STOP CONTROL IS USED, REMOVE LEAD 897 FROM TERM. 40 TO 53. ALARM BELL RELAY COM NO BELL 1 2 ALARM BELL OPTION 4-20MA FOR DEMAND LIMIT (BY OTHERS) GND COOLING TOWER BYPASS (BY OTHERS) COOLING TOWER BYPASS (BY OTHERS) 52 TB GND N N 0-10 VDC 0-10 VDC CONTROLLER TB3-90 J15-NO8 TB1-12 FAN MOTOR #1 COIL (BY OTHERS) 120 VAC 1.0 AMP MAX. TB3-91 J16-NO9 N 120 VAC 120 VAC NOTE: CONDENSER FAN MOTORS CAN ALSO BE CONTROLLED BY PRESSURE SWITCHES ON THE CONDENSER. FAN MOTOR #2 COIL (BY OTHERS) 120 VAC 1.0 AMP MAX. FAN MOTOR #3 COIL (BY OTHERS) 120 VAC 1.0 AMP MAX. FAN MOTOR #4 COIL (BY OTHERS) 120 VAC 1.0 AMP MAX. TB3-92 J16-NO10 TB3-93 J16-NO11 TB3-94 J18-NO VAC 120 VAC 120 VAC FAN MOTOR #5 COIL (BY OTHERS) 120 VAC 1.0 AMP MAX. TB3-95 J22-NO VAC FAN MOTOR #6 COIL (BY OTHERS) 120 VAC 1.0 AMP MAX. TB3-96 J22-NO VAC FIELD WIRING FOR WGZ C (REMOTE CONDENSER) WITH MICROTECH CONTROLLER DWG REV.0D FAN MOTOR #7 COIL (BY OTHERS) 120 VAC 1.0 AMP MAX. FAN MOTOR #8 COIL (BY OTHERS) 120 VAC 1.0 AMP MAX. TB3-97 J22-NO VAC IMM WGZC WGZ 030C through 200C 55

56 Control Panel Layout Table 35, Typical Control Panel, 4-Compressor Unit w/ Optional Disconnect Switch Microtech Controller (2) Circuit Mechanical Hi-Pressure Switch Relays Switches 7/8-in. KO for control wiring (4) Compressor Circuit Breakers (4) Compressor Contactors Location for Optional External Overloads (3) 120V/24V Transformers LineV/120V Control Transformer Control Transformer Fuses, Primary Control Transformer Fuse, Secondary Optional Disconnect Switch KO for Power Wiring Grounding Lug 1. Additional space provided in the upper right section for extra components required for optional multiple point power connection. 2. Front door has opening on top for access to the MicroTech II controller for viewing display and making keypad entries without opening the panel door. Motor Protection Module The motor protection system consists of an external control module, located on each compressor, connected to a series of thermistors located in the motor windings and the compressor discharge port. If the windings experience an over-temperature condition or the discharge temperature is excessive, the module will trip and shut off the compressor for a 30-minute time delay. 56 WGZ 030C through 200C IMM WGZC