MEA. Self-Contained Air Conditioning System. Installation and Maintenance. Type SWP Vintage Sizes 18 through 95, 105. Group: Applied Systems

Transcription

1 Installation and Maintenance IM 0- Group: Applied Systems Part Number: IM 0 Date: September 005 Self-Contained Air Conditioning System Type SWP Vintage Sizes through 95, 05 MEA 6-9-E 005 McQuay International

2 Contents Introduction General Description Inspection Installation Handling Vibration Isolators Setting Factory-Supplied Plenum Location/Service Access Removing Shipping Restraints Refrigerant Piping Pressure Relief Valves Water Connections General Condenser Piping Condensate Drain Connection Duct Connections Supply Air Return Air Physical Data Dimensional Data Unit Weights Electrical Data Field Wiring General Unit Disconnect Return Air and Outside Air Sensors Supply Power Wiring Lug Sizes Control Center Electrical Legend Typical Wiring Schematics Control Panel Components Manual Motor Protector (MMP) Other MMP features: Circuit Breaker Terminals Phase Voltage Monitor (PVM) (see page 0) High Pressure Switches Low Pressure Switches Compressor Motor Protector Proof of Airflow Switch Frost Protection Switches Clogged Filter Switch Winterizing Water Coils Unit Options Duct High Limit Phase Fail/Under Voltage Protection Duct Static Pressure Sensor Mounting instructions (See Figure.) Hot Gas Bypass Freezestat Condenser Water Flow Switch Water Side Economizer Condenser Water Head Pressure Control Adjustable Frequency Drive Disconnect Switch Dual Power Supply Electric Heat Hot Water Control Battery Pack System Check, Test, and Start General Pre Start-up Start-up General Fan start-up Compressor start-up Economizer start-up Hot water start-up Expansion valve superheat adjustment Refrigerant charge Variable air volume (VAV) start-up RPM changes Drive sheave alignment Drive belt adjustment Final control settings Maintaining control parameter records System Maintenance Planned Maintenance Motor Bearings Maintenance Fan Bearing Maintenance Bearings in Bolt-on Housings (Units) Replacement Parts Service and Warranty Procedure Replacement Parts Compressors All Compressors In-Warranty Return Material Procedure Warranty Return Material Procedure Replacement Parts Check, Test, and Start Procedure Form McQuay and MicroTech II are registered trademarks of McQuay International. LONMARK and LONWORKS are trademarks of Echelon Corporation registered in the United State and other countries. ASHRAE and BACnet are registered trademarks of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. Copyright 005 McQuay International. All rights reserved throughout the world.

3 Introduction General Description McQuay Self-Contained Air Conditioning units, models SWP 0 through 05 are factory assembled, refrigerant charged and tested, water-cooled packaged air conditioning units designed for ducted applications. Each unit contains multiple hermetic compressors, water cooled condensers, multi-circuit evaporator, thermal expansion valves, interconnecting refrigerant piping, forward curved or airfoil centrifugal fan, belt drive, fan motor, pleated filters and all necessary operating and safety controls. All rigging, installation, power and control wiring external to the unit, and condenser water and condensate piping are the responsibility of the installer. The MicroTech II self-contained unit controller is standard equipment. For a detailed description of the MicroTech components, input/output configurations, field wiring options and requirements, and service procedures, refer to IM 0, MicroTech II Self-Contained Unit Controller. For a description of operation and information on using and programming the MicroTech II unit controller, refer to the appropriate operation manual (see Table ). Table : Self-contained unit operation manual Unit control configuration Variable air volume (VAV) Discharge air control (DAC) Constant air volume Space comfort control (SCC) Constant air volume Discharge air control (DAC) Inspection Operation manual number OM - OM - OM - When the equipment is received, carefully check all items against the bill of lading to ensure a complete shipment. Do not sign the shipping receipt until all items are accounted for. Carefully inspect all units for damage upon arrival. Report all shipping damage to the carrier and file a claim. Before unloading the unit, check the unit serial plate to be sure it agrees with the power supply available. Figure : Nomenclature SWP F Self-contained Water cooled Plenum discharge Vintage D = Individual condenser circuit, 95 tons E = Individual condenser circuit, 05 tons F = Dual circuit Nominal tons McQuay IM 0-

4 Installation Note Only qualified personnel familiar with local codes and regulations and experienced with this type of equipment should perform installation and maintenance. Handling CAUTION Sharp edges and coil surfaces can cause personal injury. Wear protective gear and avoid contact. Units ship with a protective covering that should remain in place while the unit is being moved to its final location. Note Check for concealed damage as soon as possible. WARNING Never allow any part of the unit to fall during unloading or moving as this can cause equipment damage, severe personal injury, or death. Units are provided with lifting lugs for rigging with a crane. If units are lifted by crane, use slings or cable to protect against chaffing damage and use spreader bars across the top of the cabinet to prevent any structural damage to the frame. The unit base frame accepts dollies or Johnson bars for transporting the unit. Place furniture dollies at both ends of the chassis or at one end and use a Johnson bar at the other end for maneuvering. CAUTION Do not attempt to install dollies in the center of the unit. Units can become unstable and tip over, causing injury CAUTION Do not move units in an upended position. Internal components may tear away, causing injury. Protect floor surfaces when equipment is moved across finished flooring. Use plywood sheeting to protect surfaces and distribute weight loading. Vibration Isolators All units are provided with " neoprene isolation pads, shipped separately. Install pads beneath the unit, locating at each corner and the center of each base channel. For units provided with more than six isolator pads, evenly space the additional pads under the front and rear base channels. Setting Factory-Supplied Plenum If the unit is provided with a factory plenum for field mounting, use a forklift, slings, or other suitable lifting means. Foam rubber gasketing is provided around the perimeter of the unit top. Carefully set the plenum. Attach with mounting hardware provided with the plenum. Location/Service Access To facilitate installation and provide service, and maintenance access, follow the recommended clearances in Table. Minimum clearances required by local, state, or federal codes such as the NEC take precedence over those listed below. Clearance is required to allow room for side filter access, mechanical cleaning of the condenser tubes and economizer coil, access to expansion valves and other control components, and to allow for possible fan shaft or compressor removal. Table : Recommended clearances Location Clearance length Unit front " Unit rear " Motor location, right side 6" Piping location, left side or right side 6" Side without motor or piping " Figure : Recommended service and maintenance clearance Independent circuits Back Airflow " Dual circuits Back Airflow " Left side Evaporator coil Condenser cleanout Left side Evaporator coil Condenser cleanout " or 6" Compressors Motor 6" " or 6" Compressors Motor 6" AFD 5 6 Electrical panel Right side AFD 5 6 Electrical panel Right side " Front " Front McQuay Cat IM 0-

5 Installation Removing Shipping Restraints Mechanical restraints are used to secure the spring-mounted fan during shipment. Remove the restraints and the shipping blocks after the unit is set in its final location. Refrigerant Piping Pressure Relief Valves All units have individual refrigerant circuits and each circuit is provided with a spring loaded relief valve. The valve is set to open when refrigerant pressure reaches 00 psig. The relief valve accommodates a /" flare connection for applications where it is necessary to connect vent piping and run it outside the building. Water Connections General WARNING Connection plates can be used as rigging plates for the fan section only. Do not use them for rigging the entire unit. Unit can tip or fall and cause equipment damage, severe personal injury, or death. CAUTION When refrigerant is vented to the outside of the building, install the vent piping as recommended in ASHRAE Standard Failure to vent properly can result in personal injury. Due to the variety of piping practices, follow the recommendations of local authorities. They can supply the installer with the proper building and safety codes required for proper installation. For best performance, install the piping with a minimum number of bends and elevation changes. Size piping to minimize system pressure drop. Piping should contain the following: Vibration eliminators to reduce vibration and noise transmission to the building. Shutoff valves to isolate the unit from the piping system during unit servicing. Manual or automatic air vent valves at the high points of the system. Some means of maintaining adequate system water pressure (e.g., expansion tank or regulating valve). 5 Temperature and pressure indicators located at the unit to aid in servicing. 6 A strainer or some means of removing foreign matter, which can damage the pump and shorten unit life, from the water before it enters the pump. Such damage is not covered by warranty. Place the strainer far enough upstream to prevent cavitation at the pump inlet (consult pump manufacturer for recommendations). Using a strainer prolongs pump life and helps maintain system performance. Condenser Piping Units can be specified with water and condensate connections on either the left or right side of the unit. All condensers are factory piped for a common condenser water supply and a common condenser water return connection. Make field piping connections to factory-provided piping, locating them as indicated on the unit submittal drawings. Run the piping connections to the outside of the unit cabinet. Connections are located behind a factory-mounted shipping cover. All connections are copper sweat connections as indicated on unit dimensional drawings. Make supply and return water connections at the proper locations as indicated by the dimensional drawings. The supply (water in) connection is always the lower connection. 5 Units with factory-mounted water side economizer should not require head pressure control. The economizer typically elevates the water temperature by 5 F to 0 F before entering the condenser. Economizer cooling takes over when the water is too cold for compressor operation. Mechanical cooling is locked out below 55 F EWT. 6 If entering condenser water temperatures will go below 55 F, provide head pressure control. Fan cycling and/or modulating discharge dampers on the cooling tower are often used, or a -way bypass around the tower is used to maintain condenser water temperature. If multiple units are in the loop, it is generally more cost effective to use cooling tower control to maintain the temperature at >55 F. If a field-installed water regulating valve is placed in service with the unit condenser, install it in the water line leaving the condenser; it should shut down to prevent water from siphoning out of the condensers. For systems where a constant pumping head is required, install the water regulating valve in a bypass line around the condensers. It then must open on falling discharge pressure. These typical systems, depending on the specific application, must maintain a constant condensing pressure regardless of temperature conditions and must provide adequate head pressure for proper thermostatic expansion valve operation. A minimum head pressure of 0 psi (95 F condensing temperature) is recommended. Condenser tube velocities must not exceed 0 feet per second. Flow and velocity will be satisfactory if water volumes do not exceed those shown in Figure 5 on page. Figure : Condenser regulating valve (refrigerant pressure controlled) Condenser Cooling tower P McQuay IM 0-

6 Installation Figure : Condenser water pressure drop, SWP 0 to 00, independent circuit Pressure Drop (ft H O) HP HP HP HP HP 6 HP 0 HP Figure 5: Condenser water pressure drop, SWP 05 to 05 independent circuit, Pressure Drop (ft H O) HP 6HP 5HP 56HP 60HP 0HP 0HP HP HP 90HP 05HP 0HP Condenser Flow Rate (gpm) HP = total unit compressor horsepower Condenser Flow Rate (gpm) HP = total unit compressor horsepower Figure 6: Condenser water pressure drop, SWP 0 to 095, dual circuit 60 0 HP 6 HP HP 6 HP 6 HP 5 HP 56 HP 60 HP Figure : Economizer water pressure drop, SWP 0 to Pressure Drop (ft H O) 0 0 Pressure Drop (ft H O) Condenser Flow Rate (gpm) HP = total unit compressor horsepower Condenser Flow Rate (gpm) Note:. Includes coil, control valves and interconnecting piping.. Add this ΔP to condenser ΔP to obtain unit ΔP for pump selection McQuay IM 0-

7 Installation Figure : Water regulating valve pressure drop, head pressure control Pressure Drop (ft H 0) Figure 9: Hot water coil pressure drop, SWP 0 to 00 Pressure Drop (ft H O) Condenser Flow Rate (gpm) Water Flow Rate (gpm) Figure 0: Hot water coil pressure drop, SWP 05 to 05 Pressure Drop (ft H O) Condensate Drain Connection The condensate drain connection is /" O.D.S. copper and is located on the same end of the unit as the condenser water connections. The drain is internally trapped at the factory, requiring no external trap. Pitch the condensate line away from the unit with a minimum slope of /" per foot. Keep drain pans and the drain trap clean by periodic cleaning. A cleanout is provided as standard in the trap to aid in cleaning Water Flow Rate (gpm) McQuay IM 0-5

8 Installation Duct Connections Figure : Discharge duct configurations Supply Air To connect supply ductwork directly to the unit, first mount a duct collar at the fan outlet, avoiding the mounting screws located around the perimeter of the fan discharge opening. See Figure. Fan discharge opening sizes are indicated on the unit dimensional drawings. McQuay recommends a canvas type connecting collar. Install ductwork as shown in Figure. Duct take-offs that are installed opposite to the direction of fan rotation result in an associated system effect loss and reduced fan performance. Filter Section Economizer Evaporator Heater Electrical Panel Filter Section Economizer Evaporator Heater Electrical panel If a field-fabricated plenum is used, again, correctly orient duct take-off locations to the rotation of the fan to minimize system losses. Refer to unit dimensional drawings and Figure for plenum mounting size requirements. Canvas type connectors are recommended at the duct connection to the plenum. Units are also available with a factory-provided discharge plenum. Supply duct connections to the plenum opening(s) should include a canvas-type connector. Plenum opening sizes and locations are indicated on the job submittal drawing. Figure : Unit top detail." (typ) Centerline of sheet metal screws." (typ) Fan discharge opening Unit length Unit depth If a field-fabricated plenum is used, again correctly orient duct take-off locations to the rotation of the fan to minimize system losses. Refer to unit dimensional drawings and Figure. for plenum mounting size requirements. Use canvas type connectors at the duct connection to the plenum. Return Air Return air to the unit can be ducted or free, as follows. Ducted return Attach return ductwork to the " flange around the perimeter of the unit s return air opening. Refer to Figure. Use a canvas-type duct connecting collar. All ductwork connected to the unit must be of adequate size and construction for the application. Also use a canvas-type connector where the duct penetrates the machine room wall(s). This helps prevent vibration generated by air movement in the duct from being transmitted out to the occupied spaces. Note Do not obstruct the unit access panel located below the return opening. Free return Use the mechanical equipment room as a return plenum with no hard connection at the unit. Note Some building codes do not allow using the mechanical room as a return plenum. Check applicable local codes for each installation. Figure : Back elevation 9 (Optional) Multi-Directional Plenum Units are also available with a factory-provided discharge plenum. Supply duct connections to the plenum opening(s) should include a canvas-type connector. Plenum opening sizes and locations are indicated on the job submittal drawing. D K x L Return Air Opening.0.0 Typical M B Mechanical Access (See Notes) Neoprene Isolation Pads, Shipped Separately Note: Filters are removable from the rear of the unit or through a side filter access door located on the piping connection side. Length increases by approximately /" for piping connections with water economizer option. Mechanical access panel(s) in the back of the unit start " below the return duct opening. Do not obstruct the access panel(s). All dimensions are ±0.5". 6 McQuay IM 0-

9 Physical Data Table : SWP 0 through SWP 05 Compressor Data SWP model size Quantity,, or,, or, 6 6 Size See unit data plate Evaporator coil Face area (ft ) Waterside economizer coil Face area (ft ) Max. wkg. press. (psig) Hot water heating coil Face area (ft ) Rows,,,,,,,,, Fpi Electric heat kw Filters (Quantity) Size " depth Evaporator fan a (6) 0 0 (6) 0 0 (6) 0 0 () 5 0 () 5 0 () 5 0 (0) 5 0 (0) 5 0 () 5 0 () 5 0 () 0 0 (6) 6 0 () 5 0 () 0 0 (5) 5 0 (6) 6 0 (5) 5 0 Quantity Size Minimum horsepower Maximum horsepower () 6 0 () 0 5 () 6 5 Minimum design cfm, CV Min. design cfm, VAV Maximum design cfm Condenser Waterside wkg. press. (psig) Min. entering temp. ( F) Minimum GPM Maximum GPM a. Standard fan TSP limit is 5.5 inches of water. Consult your local McQuay sales representative for applications beyond this range. McQuay IM 0-

10 Physical Data Table : R-0C compressor circuit charge Compressor (hp) Refrigerant charge per circuit (R-0C)* Oil charge per circuit (oz) 6 9 lbs 60 0 lbs 0 lbs 0 5 lbs lbs *Charge quantities listed are average. Actual charge quantity is dependent on individual unit evaporator coil circuiting. Actual charge quantities are stamped on each unit nameplate. Table 5: R- compressor circuit charge Compressor (hp) Refrigerant charge per Oil charge per circuit (R-)* circuit (oz) 6 9 lbs 66 0 lbs lbs 5 5 lbs 5 Figure : Front left side (CW) discharge with optional multi-directional plenum Multi-directional plenum, optional (Plenun can ship separately. All openings are on the plenum centerline. For additional information, see submittal drawings.) K x L return air.5" Filter s ection Economizer Evaporator Heater G J Electrical panel 0 lbs 56 () 6 lbs 0 9.0" (0. for 05E) Outlet Inlet () 9 lbs 0 () lbs 0 Q R A () 9 6 lbs 0 () 0 6 lbs 0 () 0 to lbs 0 () 5 6 to 0 lbs 0 *Charge quantities listed are average. Actual charge quantity is dependent on individual unit evaporator coil circuiting. Actual charge quantities are stamped on each unit nameplate. Dimensional Data Table 6 contains dimensions that vary from unit to unit, marked with letters (A, B, C, etc.) in the figures. Depth, length, and height dimensions do not include lifting lugs, the handle, latch, or fastener extensions. For shipping dimensions, the skid adds " (0 mm) to depth, " (0 mm) to the length, and " (0 mm) to the height. For units with the optional plenum, the plenum can ship separately. All openings are on the plenum are centerline. For additional information, refer to the submittal drawing. (See Figures and 5.) Figure 5: Back left side (CCW) discharge with optional multi-directional plenum Multi-directional plenum, optional (Plenun can ship separately. All openings are on the plenum centerline. For additional information, see submittal drawings.) K x L return air.5" Filter s ection Economizer Evaporator Heater 9.6" (-95) 0. (05) Electrical panel Service connections are determined when facing the front of the unit. Left-hand connections are standard; right-hand connections are optional. Please indicate on the unit submittal. Unit sizes 0, 0, and 0 have a single mechanical access panel in the bottom front and bottom back. (See Figures 6,,, and 9.) 9.0" (0. for 05E) Q R Outlet Inlet A McQuay IM 0-

11 Physical Data Table 6: Dimensions Basic unit A Depth B Length D Height F Fan discharge G Fan discharge to shaft H Fan discharge location J Fan discharge location K Return opening height L Return opening length M Base of return opening N Water out/in (ODS) / / / 5/ 5/ 5/ / / / / / / P -row HW conn (ODS) 5/ 5/ 5/ 5/ 5/ 5/ 5/ 5/ / / / / P -row HW conn (ODS) 5/ 5/ 5/ 5/ 5/ / / / / Q Condenser outlet* R Condenser inlet* *For F vintage units, subtract.. Figure 6: Unit front plan Left side piping connections Return air Right side piping connections* (optional) Power entry Figure :.Back elevation 9" D H F H K L Return air opening Multi-directional plenum* (optional) * Select unit arrangement on the unit selection. Plenum can ship separately. All openings are on plenum center line. For additonal information, refer to submittal drawing..0" Typical.0" * M Supply fan motor Notes: Service connections determined when facing the front of the unit. Left-hand standard, right-hand optional. Please indicate on the unit submittal. Figure : Front elevation AFD (optional) Disconnect switch (optional) MicroTech II panel Power entry /" pilot K.O. /" B Mechanical access* Figure 9: Left side " Neoprene isolation pads, shipped separately Notes: Service connections determined when facing the front of the unit. Left-hand standard, right-hand optional. Please indicate on the unit submittal. Unit sizes 0, 0, and 0 have a single mechanical access panel. Multi-directional plenum* (optional) (P) Hot water out D Electrical access 6" Mechanical access K L return air /" ODS drain (N) Water out (N) Water in (P) Hot water in.5".5" B Notes: Service connections determined when facing the front of the unit. Left-hand standard, right-hand optional. Please indicate on the unit submittal. Unit sizes 0, 0, and 0 have a single mechanical access panel. Lifting lug " typ. A/ A Notes: Service connections determined when facing the front of the unit. Left-hand standard, right-hand optional. Please indicate on the unit submittal. McQuay IM 0-9

12 Physical Data Figure 0: Discharge plenum (optional) Plan view Depth Unit size Length (in) Depth (in) Height (in) 0 to 0, 9, 5, 05 to 00 00, 9, 5, Length 05 to , 5, Front/back elevation " Left/right elevation H A H B " Min " 00 9, 5, 00 9, 5, Height Height 095 to , 5, " Min Unit Weights Table : Unit and component weight (lbs) Unit weights Basic configuration Unit size SWP basic unit a Filters " 0% or 65% efficiency Evaporator coil 6 row, fpi Water economizer coil b c row, fpi Water weight Hot water coil d c row, fpi Water weight Electric heat kw kw Supply fan motors hp ODP 5 hp ODP.5 hp ODP 0 hp ODP 5 hp ODP hp ODP 5 hp ODP hp ODP hp ODP hp ODP hp ODP a. Base weight includes supply fan without motor. b. Water economizer weight includes valves and piping. c. The values in this table do not include water weight. d. Hot water coil weight includes valve and piping. 0 McQuay IM 0-

13 Physical Data Table : Unit and component weight (lbs), continued Unit size Unit weights Supply fan motors, continued hp TEFC 5 hp TEFC 5.5 hp TEFC hp TEFC hp TEFC hp TEFC hp TEFC hp TEFC hp TEFC hp TEFC hp TEFC Compressor/condenser assembly Water weight () 6 hp () hp () hp () 9 hp () 6 hp, () 0 hp 5 () 6 hp, () 0 hp () 6 hp, () 0 hp () 0 hp 95 () 0 hp, () hp () hp () hp, () 5 hp () 5 hp () 5 hp, () 0 hp () 0 hp (6) hp () hp, () 5 hp (6) 5 hp () 5 hp, () 0 hp (6) 0 hp Discharge plenum " high " high " high " high a. Base weight includes supply fan without motor. b. Water economizer weight includes valves and piping. c. The values in this table do not include water weight. d. Hot water coil weight includes valve and piping. McQuay IM 0-

14 Electrical Data Field Wiring General Wiring must comply with all applicable codes and ordinances. McQuay s product warranty does not cover equipment failures caused or contributed to by wiring not in accordance with specifications. An open fuse or tripped MMP indicates a short, ground or overload. Before replacing a fuse or restarting a compressor or fan motor, locate the trouble and correct. Use copper wire for all power lead terminations. A single power terminal block is provided as standard, and wiring within the unit is done in accordance with the National Electric Code. Each branch circuit within the control panel is fused individually. A single field-supplied disconnect is required or a unit-mounted, nonfused disconnect can be ordered with the unit. A /" knockout is located on the right-hand unit upright for locating unit power entry. V field connections are suitable for Class II wiring. Return Air and Outside Air Sensors All units are provided with a return air sensor. It is connected to the input control board and is coiled and placed behind the access panel, to the right of the control panel of the unit for shipment. Field install it in the return air stream for proper unit operation. The return air sensor is connected to the unit s input board at location AI (see IM 0). The outside air sensor is optional and can be ordered with the unit. It ships loose in a package and is located on the floor of the fan section. The outside air sensor is field wired to terminal strip TB. It is connected at terminals and 5. The mixed air temperature sensor is already installed at the inlet of the unit. Mount the sensors in areas that are exposed to representative temperature conditions. Mount them at a position that has good air mixing and does not have stratification. Sensors can be mounted in the ductwork using a grommet (see Figure ). Figure : Return/outside air sensor mounting Unit Disconnect Disconnecting means are addressed by Article 0 of the Air flow National Electric Code (NEC), which requires disconnecting Sensor means capable of disconnecting air conditioning and refrigerant equipment including motor-compressors, and controllers, from the circuit feeder. Select and locate the disconnect switch within the NEC guidelines. Location requirements per NEC are that the disconnect is located in a readily accessible position within sight (50 feet) of the unit. A factory-mounted, nonfused disconnect is available. Ductwork Grommet Table : Compressor motors Compressor hp Refrigerant 0/60/ 0/60/ 60/60/ 55/60/ RLA LRA RLA LRA RLA LRA RLA LRA 6 R R R R-0 R R-0 9 R R-0 0 R R R R R R R R McQuay Cat IM 0-

15 Electrical Data Table 9: Electric heaters SWP unit size 0 V, 60 Hz, phase 0 V, 60 Hz, phase 00 V, 50 Hz, phase 60 V, 60 Hz, ph 55 V, 60 Hz, phase kw MBh FLA kw MBh FLA kw MBh FLA kw MBh FLA kw MBh FLA 0 to to Table 0: SAF motor nameplate amperage Horsepower Type 0/60/ 0/60/ 00/50/ a 60/60/ 55/60/ FLA FLA FLA FLA FLA High efficiency Premium efficiency High efficiency Premium efficiency High efficiency Premium efficiency High efficiency Premium efficiency High efficiency Premium efficiency High efficiency Premium efficiency High efficiency Premium efficiency High efficiency Premium efficiency High efficiency Premium efficiency High efficiency Premium efficiency High efficiency Premium efficiency a. 60/60/ motors are used. Derate nameplate horsepower to 0. to obtain actual horsepower. McQuay IM 0-

16 Electrical Data Supply Power Wiring Units require three-phase power supply. Allowable voltage tolerances: a 60 Hertz Nameplate 0 V: Min. V, Max. 9 V Nameplate 0 V: Min. 0 V, Max. 5 V Nameplate 60 V: Min. V, Max. 506 V Nameplate 55 V: Min. 5 V, Max. 6 V b 50 Hertz Nameplate 00 V: Min. V, Max. V Power lead wire sizing: a For units with cooling capability (all concurrent loads) with or without hot water heating and circuits with motor loads only: MCA =.5 (largest motor RLA or FLA) + other loads + amps b For units with cooling capability and nonconcurrent electric heat capability: In the cooling mode, the loads are composed of supply fan motor and compressors. In heating mode, the loads are composed of supply fan motor and electric heater. The MCA is calculated for unit running in either mode; the highest value obtained is used for the MCA. For unit in cooling mode: MCA =.5 (largest RLA or FLA) + other loads + amps For unit in heating mode, below 50 kw MCA =.5 (electric heat FLA + fan FLA) + amps For unit in heating mode, above 50 kw MCA =.5 (SAF amps) + (electric heat) + amps Size wires in accordance with Table 0-6 of the National Electrical Code. 5 Size wires for a maximum of % voltage drop. Lug Sizes Table : Lug sizes for single disconnect DIsconnect size (amps) Lug size 00 #-/0 50 #-/0 50 #-50 MCM 00 () #-600 MCM 600 () #-600 MCM Table : Lug sizes for power block Power block size (amps) Lug size 0 #6-50 MCM 0 #-600 MCM 50 () #-00 MCM 60 () #6-500 MCM Note: Use copper wire only. Control Center All electrical controls are enclosed in a central control center located at the front of the unit. The control center is divided into two separate compartments, one for high voltage and one for low voltage. The left compartment houses the high voltage components and can be accessed through the Electrical Access panels indicated on the dimensional drawing. High voltage components include: Fan motor contactor, M0/M0 Fan motor protector, MMP9, MMP0, MMP0 Fan motor circuit breaker, CB0 Compressor contactors, M M6 Compressor protector, MMP MMP6 Electric heat contactors, M M6 Transformer, T, T, T Disconnect switch, DS DS Power block, PB PB If the optional disconnect switch is provided, the switch handle is visible and accessible without removing any safety or access panels. Low voltage components are located in the right compartment and include: MicroTech II main control board, MCB Duct static pressure sensor, SPS Optional nd duct static pressure sensor, SPS Optional BACnet /IP communication module Optional BACnet MS/TP communication module Optional LONWORKS communication module* Compressor control board, CCB # Compressor control board, CCB # (6-compressor units only) Located on the face of the unit is the interactive MicroTech II keypad/display, unit switch, system indicator light and power indicator. Note IM 0 has additional layouts of the control center. McQuay IM 0-

17 SPS Electrical Data Figure : Typical 60 volt, 6-compressor control center layout, high and low voltage compartments CB0 DS DS PB PB M M FB FB PVM PVM T FB FB A B C A B C T CCB T T R6_ R R R R R R R R R R6 R R R69 R6 DHL PC PC5 GLGGLG M9 or M0B S ILR PWR FPB BATTERY SPS TB PB0 MMP0 MMP9 or MMP0 M0 or M0I M5 M6 FB5 FB6 MMP6 SINGLE MMP6 TANDEM MMP MMP MMP5 MMP TANDEM MMP MMP SINGLE M M M5 M TANDEM M SINGLE M M6 TANDEM M SINGLE TB TB CCB R5 R6 A A For A-A section detail, see Figure on page 6. Unit controller is LONMARK certified with the LONWORKS communication module. McQuay IM 0-5

18 Electrical Data Figure : A-A section detail, typical 60 volt, 6 compressor control center layout Electrical Legend ID Description Standard location ACT Actuator motor, economizer Comp/cond section AFD0 Adjustable frequency drive, supply fan Front assembly CB0 Circuit breaker, supply fan Main control box CCB, DAT Compressor control boards, refrig. circuits Discharge air temperature sensor Main control box Discharge section DHL Duct hi-limit Main control box HI HI PC PC5 LO LO DS Disconnect, total unit or cond/ heat Main control box DS Disconnect, SAF/RAF/controls Main control box SPS SPS HI HI FA, B Fuse, control circuit transformer (t), primary Main control box LO LO FC Fuse, control circuit transformer (t), secondary Main control box FB, Fuseblock, electric heat (top bank) Main control box FB, Fuseblock, electric heat (bot. bank) Main control box FP,,,, 5, 6 Frost protection, refrig. circuits Coil section, cool HLA, HLB Hi-limits, pwr, elec heaters (top bank) Heat section, electric SPARE SPARE HLA, HLB Hi-limits, pwr, elec heaters (bot. bank) Heat section, electric RAT DAT FP6 LWT EWT PRESSURE WATER_FLOW FP LP_LP FP LP_LP FP LP5_LP6 FREEZE_STAT FP MAT FP5 PRESSURE SV5 SV HP_HP CCH_CCH HP_HP CCH_CCH HP5_HP6 CCH5_CCH6 A-A SECTION CHILLED_WATER HOT_WATER/ELECTRIC_HEAT VFD_BYPASS ECONO_WTR_REG SV MP MP MP MP MP5 MP6 HP 6 Hi-pressure controls, refrig On compressors LP 6 Low-pressure controls, refrigeration On compressors M 6, M 6 Contactor, compressor Main control box M9 M0 Contactor, supply fan Main control box M0 Contactor, reversing, invertor bypass, supply fan Inverter bypass box MCB Microprocessor circuit board Main control box MJ Mechanical jumper All control boxes MMP 6, MMP 6 MMP9 0 Manual motor protector, compressors Manual motor protector, supply fan Main control box Main control box MP 6 Motor protector, compr.# 6 On compressors OAT Outside air temperature sensor Economizer section PB, Power block, power distribution Main control box 6 McQuay IM 0-

19 Electrical Data ID Description Standard location ID Description Standard location PB0 Power block, supply fan Main control box PC5 Pressure control, clogged filter Main control box PC Pressure control, proof airflow Main control box PB0 Power block, supply fan Main control box PM Phone modem Main control box PVM, Phase voltage monitor Main control box R 6 Relay, compressor high pressure Main control box UV Ultra-violet light(s) Coil/discharge section VM Valve motor #, heating Heat section ZNT Zone temp. sensor, setback Field installed General Notes. Field wiring R,,, Relay, electric heat Main control box R Relay, cool enable Main control box R6, R, R Remote fan start stop Main control box. Factory wiring R6, Relay, supply fan inverter, incr/ decr Main control box. Shielded wire/cable R6, 6, 65 Relay, use on specials Main control box R6 Relay, supply fan, enable Main control box R69 relay, inv. bypass VAV box interlock Main control box R0 9 Relay, use on specials Main control box RAT Return air temperature sensor Main control box S Switch, system on/off Main control box. Main control box terminals 5. Auxilliary box terminals 6. Field terminals S Switch, inverter bypass, on/ off Main control box S Switch, local on/auto/off to controller Main control box. Plug connector SPS, PSR, Static pressure sensors, duct/ building Pressure transducer, head pressure control Main control box Condenser section SV5, 6 Solenoid valves, hot gas Condenser section T Transformer, main control (line/ 5 VAC) Main control box. 00/ H00 Wire/harness number WN 9. Wire nut/id T Transformer, control input (5/ VAC) Main control box T T Transformer, control output (5/ VAC) Transformer, exh. damper actuator (5/ VDC) Main control box Main control box TB Terminal block, internal Main control box TB Terminal block, field, Class Main control box TB Terminal blocks, factory Main control box TB Terminal block, field, 5 VAC Main control box McQuay IM 0-

20 McQuay IM 0- Electrical Data Typical Wiring Schematics Figure : Main power schematic, constant volume ELEC. CIRCUIT # H- H- H9- H- H- H9- H- H- H9- H6- H- H- H6- H- H- H H H MTR MTR MTR MTR MTR L- L- L- L- L- L- L-5 L-5 L-5 L-6 L-6 L-6 T T T L L L TB TA TB TA TB TA LB LA LB LA LB LA T T T L L L TB TA TB TA TB TA LB LA LB LA LB LA T T T L L L TB TA TB TA TB TA LB LA LB LA LB LA T T T L L L TB TA TB TA TB TA LB LA LB LA LB LA TB TB TB TA TA TA L L L T T T LB LA LB LA LB LA TB TA TB TA TB TA LB LA LB LA LB LA T T T L L L L- L- L- GLG COMPR. PB COMPR. PB COMPR. PB COMPR. PB M MMP M MMP M MMP M MMP DS SUPPLY-FAN PB MMP0 M0 PB 9A A A 9C C C A A 6A C C 6C 0A 0A 0A A A A Schematic continues on next page.

21 Electrical Data Figure : Main power schematic, constant volume (continued) PVM 0 PHASE/VOLT PB L- L- L- 0 T_5VAC /.00 6A 59A 6A FA FB 6B H H H H T FC TBA 6B X X X TBA 5 6 GRD T_N /.00 /.00 /.00 6A 6C 6A 6A Schematic continues on previous page. 6B McQuay IM 0-9

22 0 McQuay IM 0- Electrical Data Figure 5: Main power schematic, variable air volume ELEC. CIRCUIT # H- H- H9- H- H- H9- H- H- H9- H6- H- H- H6- H- H- H H H H5 H- H- H- H- H- H MTR MTR MTR MTR MTR L L L L L L T T T L- L- L- L- L- L- L-5 L-5 L-5 L-6 L-6 L-6 T T T L L L TB TA TB TA TB TA LB LA LB LA LB LA T T T L L L TB TA TB TA TB TA LB LA LB LA LB LA T T T L L L TB TA TB TA TB TA LB LA LB LA LB LA T T T L L L TB TA TB TA TB TA LB LA LB LA LB LA TB TB TB TA TA TA L L L T T T LB LA LB LA LB LA GRD W V U W V U G T T T L L L TB TA TB TA TB TA LB LA LB LA LB LA T T T L L L L- L- L- GLG CB0 COMPR. PB COMPR. PB COMPR. PB COMPR. PB M MMP M MMP M MMP M MMP DS SUPPLY-FAN PB AFD0 GND0 M0I MMP0 M0B PB 9A A A 9C C C A A 6A C C 6C 0A 09A 0A 0A 0A 0A A A A Schematic continues on next page.

23 Electrical Data Figure 5: Main power schematic, variable air volume (continued) PVM 0 PHASE/VOLT PB L- L- L- 0 T_5VAC /.00 /.00 6A 59A 6A FA FB 6B H H H H T FC TBA 6B X X X TBA 5 6 GRD T_N /.00 /.00 /.00 /.00 66A 6C 6A 6A Schematic continues on previous page. 6B McQuay IM 0-

24 Electrical Data Figure 6: Control input schematic, constant volume /.6 /.6 T_5VAC T_N S PVM 0A 0B 5 05A MICROPROCESSOR CONTROL BOARD MCB TBD VAC 5 6 0/. TBB 0 5V V CLASS T TBB 5 6 GRD 0A LR W COM N+ N- REF J WHT BLK DRN PLUG KEYPAD DISPLAY N+/.0 N-/.05 REF/.06 TO CCB NOTES TO FIELD:. REFER TO I.M. FOR MICROTECH II ALARM CONFIGURATION.. TO ENABLE SOFTWARE INTERNAL TIME CLOCK, TERMINALS 0 & 0 MUST NOT BE JUMPERED. THE FIELD TO REMOVE JUMPERS WHEN INSTALLING COOL/HEAT ENABLE SWITCHES R6 R RS- SERIAL CONN. A (DB9-MALE) CONNECTION IS LOCATED ON DEADFRONT TIME_CLOCK MANUAL_ENABLE S SHOWN IN NIGHT OR UNOCCUPIED MODE ON OFF AUTO TB TB 0 B 0 P BINARY INPUT BI- BI R- BI BI- RS PORT # # SW t v SW t v ANALOG INPUT NJ=VDC AI- =RTD =MA =NTC AI NJ=VDC =RTD =MA =NTC AI-C AI- AI AI-C BLK RED WHT DRN 5C C TB G 0 OVERRIDE WALLSTAT ZNT ZONE SENSOR COOLING & HEATING SETPOINT 9 (EMERGENCY FAN START/STOP CONTACTS) 0/.06 TB TB 05A 0A 0B COOL_ENABLE HEAT_ENABLE EJ05 EJ06 TB TB BI- BI R- BI BI- # SW t v SW # t v NJ=VDC =RTD =MA =NTC NJ=VDC =RTD =MA =NTC AI- AI AI-C AI- AI AI-C 0C C C C WHT BLK DRN WHT BLK DRN PL PL H0- H- DRN- H- H- DRN- DAT (DISCHARGE AIR SENSOR) RAT (RETURN AIR SENSOR) PL AIR FLOW PC FREEZESTAT H- FS H- /YEL /RED PL A BI-5 BI5 R- BI6 BI-6 BI- BI #5 #6 # SW t v SW t v SW t v NJ=VDC =RTD =MA =NTC NJ=VDC =RTD =MA =NTC NJ=VDC =RTD =MA =NTC AI-5 AI5 AI-5C AI-6 AI6 AI-6C AI- AI AI-C 6C C C 9C WHT BLK DRN WHT BLK DRN WHT BLK DRN 6 C C PL6 PL5 5 H9- H9- DRN- H- H- DRN- OAT (OUTDOOR AIR SENSOR) MAT (MIXED AIR SENSOR) EWT (ENTERING WATER TEMP. SENSOR) SMOKE TB (FIELD SUPPLIED) SD TB A R- BI # SW t v NJ=VDC =RTD =MA =NTC AI- AI AI-C WHT BLK DRN 5C 6C PL H5- H5- DRN- LWT (LEAVING WATER TEMP. SENSOR) 5 5 R 6 R 6A 6C 05C 06C 0C 6B 0A A A Schematic continues on next page. McQuay IM 0-

25 Electrical Data Figure 6: Control input schematic, constant volume (continued) T_5VAC /.00 /.00 Schematic continues on previous page. SMOKE TB (FIELD SUPPLIED) SD TB 5 5 (CONTACTS OPEN ON ALARM) MJ5 NOTE TO FIELD:WHEN SMOKE DETECTOR IS FIELD SUPPLIED THE JUMPER BETWEEN TERMINALS 5 & 5 MUST BE REMOVED A FILTER SWITCH PC5 A A TB 09 FILTER INDICATION FOR FIELD OAE TR TR + SR HUM TB 5A 0 (FIELD SUPPLIED ENTHALPY) EXS TB 5A EXTERNAL EXHAUST SWITCH (SHOWN WITH FAN IN OFF POSITION) 0 DHL 60A DUCT HI-LIMIT PL WFS H65- H65- BRN() BLK(/) (WATER FLOW SENSOR) BLU() H66- TB TB 5 65A 65A RES 0 OHMS 0A 0A BI R- BI BI- BI-9 BI9 R-5 BI0 BI-0 BI- BI R-6 BI BI- BI- BI R- BI BI- BI-5 BI5 R- BI6 BI-6 # t v SW # t v SW # t v SW # t v SW #5 t v TB_0/.5 NJ=VDC =RTD =MA =NTC 5V DC NJ=VDC =RTD =MA =NTC NJ=VDC =RTD =MA =NTC NJ=VDC =RTD =MA =NTC AI AI-C AI- AI AI-C AI-9 AI9 AI-9C AI-0 AI0 AI-0C AI- AI AI-C AI- AI AI-C AI- AI AI-C AI- AI AI-C AI-5 AI5 AI-5C AI-6 AI6 AI-6C 55C 56C 5C 59C BLK DRN WHT BLK DRN WHT BLK DRN WHT BLK DRN WHT BLK DRN C H- DRN- 5C 6C PL H5- H5- DRN- DRN-9 DRN-9 6C 6C DRN-9 DRN- 0 PL9 (ENTERING WATER TEMP. SENSOR) LWT (LEAVING WATER TEMP. SENSOR) SPS + (DUCT STATIC PRES SENSOR) SPS + (DUCT STATIC PRES SENSOR) H6-0 nd PRESSURE SENSOR AFD0 H TB 0 TB_0/.6 TB S - S - McQuay IM 0-

26 Electrical Data Figure : Control input schematic, variable air volume /.6 /.6 T_5VAC T_N S PVM 0A 0B TBD 5 WIRING TO BAS CONNECTION (VARIES WITH COMMUNICATION CARD SELECTED) TB 9 9G 09A 0A A WHT BLK DRN MICROPROCESSOR CONTROL BOARD MCB BCNT BACNET-MSTP COMM. CARD VAC COM N+ N+ N- REF N- REF J TBB 0 5V V CLASS WHT BLK DRN PLUG T TBB KEYPAD DISPLAY 5 6 GRD 0A R N+/.0 N-/.05 REF/.06 LR W TO CCB NOTES TO FIELD:. REFER TO I.M. FOR MICROTECH II ALARM CONFIGURATION.. TO ENABLE SOFTWARE INTERNAL TIME CLOCK, TERMINALS 0 & 0 MUST NOT BE JUMPERED. THE FIELD TO REMOVE JUMPERS WHEN INSTALLING COOL/HEAT ENABLE SWITCHES R6 R 9 (EMERGENCY FAN START/STOP CONTACTS) RS- TB TB 0A 0B SERIAL CONN. A (DB9-MALE) CONNECTION IS LOCATED ON DEADFRONT TIME_CLOCK MANUAL_ENABLE COOL_ENABLE HEAT_ENABLE S SHOWN IN NIGHT OR UNOCCUPIED MODE ON OFF AUTO TB TB TB TB P BINARY INPUT BI- BI R- BI BI- BI- BI R- BI BI- RS PORT # # # # SW t v SW t v SW t v SW t v ANALOG INPUT NJ=VDC AI- =RTD =MA =NTC AI NJ=VDC =RTD =MA =NTC NJ=VDC =RTD =MA =NTC NJ=VDC =RTD =MA =NTC AI-C AI- AI AI-C AI- AI AI-C AI- AI AI-C 5C A C C 0C C C C WHT BLK DRN WHT BLK DRN WHT BLK DRN WHT BLK DRN TB 0 G G PL PL H0- H- DRN- H- H- DRN- OVERRIDE REQ'D FOR NIGHT SETBACK OR SPACE RESET ZNT ZONE OR SPACE SENSOR DISCHARGE AIR TEMPERATURE EXTERNAL RESET DAT (DISCHARGE AIR SENSOR) RAT (RETURN AIR SENSOR) PL AIR FLOW PC FREEZESTAT H- FS H- /YEL /RED PL A BI-5 BI5 R- BI6 BI-6 BI- BI #5 #6 SW t v SW t v SW # t v NJ=VDC =RTD =MA =NTC NJ=VDC =RTD =MA =NTC NJ=VDC =RTD =MA =NTC AI-5 AI5 AI-5C AI-6 AI6 AI-6C AI- AI AI-C 6C C C 9C C C WHT BLK DRN WHT BLK DRN WHT BLK DRN 5G PL6 PL5 5 H9- H9- DRN- H- H- DRN- OAT (OUTDOOR AIR SENSOR) MAT (MIXED AIR SENSOR) EWT (ENTERING WATER TEMP. SENSOR) SMOKE R- SW # NJ=VDC =RTD =MA =NTC AI- AI 5C WHT PL H5- LWT 5 5 R 6A 6C B B C B B A Schematic continues on next page. McQuay IM 0-

27 Electrical Data Figure : Control input schematic, variable air volume (continued) /YEL /RED Schematic continues on previous page. SMOKE TB (FIELD SUPPLIED) SD TB 0A 5 5 (CONTACTS OPEN ON ALARM) NOTE TO FIELD: WHEN SMOKE DETECTOR IS FIELD SUPPLIED,THE JUMPER BETWEEN TERMINALS 5 & 5 MUST BE REMOVED FILTER SWITCH PC5 TB FILTER INDICATION FOR FIELD 09 OAE TR TR + SR HUM TB 5A 0 (FIELD SUPPLIED ENTHALPY) EXS TB 5A EXTERNAL EXHAUST SWITCH (SHOWN WITH FAN IN OFF POSITION) 0 PL WFS H65- H65- BRN() BLK(/) (WATER FLOW SENSOR) BLU() H66- TB 9 65A 65A RES K OHM 0A 0A BI R- BI BI- BI-9 BI9 R-5 BI0 BI-0 BI- BI R-6 BI BI- BI- BI R- BI BI- BI-5 BI5 R- BI6 BI-6 # t v SW # t v SW #9 t v SW #5 t v TB_0/.5 NJ=VDC =RTD =MA =NTC NJ=VDC =RTD =MA =NTC 5V DC NJ=VDC =RTD =MA =NTC AI AI-C AI- AI AI-C AI-9 AI9 AI-9C AI-0 AI0 AI-0C AI- AI AI-C AI- AI AI-C AI- AI AI-C AI- AI AI-C AI-5 AI5 AI-5C AI-6 AI6 AI-6C C 5C 6C 0C C BLK DRN WHT BLK DRN DRN WHT BLK WHT BLK DRN H- DRN- PL H5- H5- DRN- PL0 DRN- 9 6 H0-9 H-6 P0 6C 6C DRN-9 DRN- 0 PL9 EWT (ENTERING WATER TEMP. SENSOR) LWT (LEAVING WATER TEMP. SENSOR) (WATER ECONO) P CW (OP) ACT_POT P CCW (CL) P H6-0 AFD0 H TB 0 TB_0/.6 McQuay IM 0-5

28 Electrical Data Figure : Condenser output schematic dual refrigerant circuit /.6 T_5VAC T_V/. PL9 R 6 H0- H0- H0- FP H0- H- LP H- PL9 R 0A 0B PL FP PL PL PL PL9 B H- LP H- PL9 B 5A M A 6 M A M 6A 0 M A 5 V J9 BI COM BI BI BI BI5 BI6 COM BI BI BI9 BI0 BI BI N BUS JUMPERS B0 ENABLE DISABLE B0 ENABLE DISABLE (JUMPER LOCATED JUST UNDER COMM. CARD) COMPR. CONTROL BOARD CCB INPUTS BI=BINARY AI=ANALOG J0 BO COM NO 0 (WATER PUMP) C N+ N- REF J AI COM AI COM AI6 COM AI5 COM AI COM T_COM/.50 B B C N+/.0 N-/.0 REF/. COMMUNICATION CABLE FROM THE MAIN BOARD (MCB) RESISTOR.0K OHM, W R 9C TB TB 9D 9E 5 (PUMP SIGNAL) TB TB M 6 PL H- CCH H- PL R /.6 T_N A 0B 6C 05A Schematic continues on next page. C C 0B B 0B 6 McQuay IM 0-

29 Electrical Data Figure : Condenser output schematic dual refrigerant circuit (continued) Schematic continues on previous page. ( ) M 6 B PL H- CCH H- PL PL HP H6- H6- REFRIGERANT CIRCUIT # PL 6A BO COM NO 0 (COMPR #) MMP 6B 6D PL H6- M M H6- PL 6F T MP T H6- PL BO6 COM NO 0 (COMPR #) MMP 0B 0D PL H0- M M H0- PL 0F 6 T MP T H0- PL M 0 M B 5B PL PL H- H5- CCH H- CCH H5- PL PL PL H56- HP H56- REFRIGERANT CIRCUIT # PL A BO NO COM 0 (COMPR #) MMP B D PL H- M M H- PL 9F T MP T H- PL Schematic continues on next page. 0 BO9 COM NO 0 (COMPR #) GRD 9 MMP 5B 5D PL5 H5- M M H5- PL5 5F 6 M 5 55B PL H55- T MP CCH T H5- H55- PL5 PL R A A A A R M M M M A A A A McQuay IM 0-

30 Electrical Data Figure 9: Condenser output schematic, independent refrigerant circuit /.6 T_5VAC T_V/. PL9 PL9 PL PL R 0A 0B R 6 R 0A 0B R 50 0B H- LP H- PL9 B PL FP H0- H0- PL H- LP H- PL9 B PL H0- FP H0- PL LP PL PL0 H- H- B H- H- C FP PL0 LP H0- H0-0B H0- H0-0C PL PL0 FP PL0 M A 6 M A M 6A 0 M A 5 PL HP H6- H6- PL V C J9 BI COM N BUS N+ N- BI JUMPERS REF B0 ENABLE DISABLE B0 ENABLE DISABLE BI (JUMPER LOCATED JUST UNDER COMM. CARD) BI COMPR. CONTROL BOARD J AI CCB COM BI5 INPUTS BI=BINARY AI=ANALOG AI BI6 COM COM AI6 J0 COM BI AI5 BI COM BI9 AI COM BI0 BI BI BO COM NO 0 (WATER PUMP) BO COM NO T_COM/.50 B B C N+/.0 N-/.0 REF/. COMMUNICATION CABLE FROM THE MAIN BOARD (MCB) RESISTOR.0K OHM, W R 9C TB TB 9D 9E 5 (PUMP SIGNAL) TB TB M 6 PL H- CCH H- PL MMP 6B 6D PL H6- M M H6- PL 6F A R M A /.6 T_N A 0B 6C 06A C C Schematic continues on next page. 6A 0B B 0B McQuay IM 0-

31 Electrical Data Figure 9: Condenser output schematic, independent refrigerant circuit (continued) Schematic continues on previous page. PL HP H6- H6- REFRIGERANT CIRCUIT # PL 6A PL H0- HP H0- REFRIGERANT CIRCUIT # PL 0A PL H56- HP H56- REFRIGERANT CIRCUIT # PL A PL H5- HP H5- REFRIGERANT CIRCUIT # PL 5A (WATER PUMP) BO COM NO 0 (COMPR #) BO6 COM NO 0 (COMPR #) BO NO COM 0 (COMPR #) BO9 0 COM NO 9 0 (COMPR #) GRD M 6 B PL H- CCH H- PL MMP 6B 6D PL H6- M M H6- PL 6F T MP T H6- PL MMP 0B 0D PL H0- M M H0- PL 0F 6 T MP T H0- PL M 0 M B 5B PL PL H- H5- CCH H- CCH H5- PL PL MMP B D PL H- M M H- PL 9F T MP T H- PL MMP 5B 5D PL5 H5- M M H5- PL5 5F 6 M 5 55B PL H55- T MP CCH T H5- H55- PL5 PL R R R A A A A R M M M M A A A A McQuay IM 0-9

32 Electrical Data Figure 0: Inverter output schematic /.6 T_5VAC MMP0 () () 0 S SUPPLY AIR INVERTER NC C NO R6 A B BYPASS 09 A A M0I A M0B A /.6 T_N 5 0 I I 66A 6C 6A 5A Schematic continues on next page. 0 McQuay IM 0-

33 Electrical Data Figure 0: Inverter output schematic (continued) H- H- H- HA Schematic continues on previous page AFD SAF ABB PL9 PL9 PL9 PL9 D R6 5A 5B M0I A 5 09 HDN HV HUP R6_ INCR DECR McQuay IM 0-

34 Electrical Data Figure : Control output schematic, water regulator valve/airside economizer /.6 T_5VAC L 5V L T X V X 0A CLASS TBC 0B TBC 0B 0 9 5WFTG0SN GRD SOURCE - WIRED INTERNAL TO MOTHERBOARD SRC - 0 V SRC MCB R6 TB JPR REMOVE JUMPER BETWEEN TERMINALS 6 & FOR PIORITY STOP REMOVE JUMPER BETWEEN TERMINALS 5 & 5 FOR PIORITY START BO R TB TB TB 09B R6 NO V SRC (FAN OPERATION) MCB BO TB TB A NO 6 V SRC V SRC MCB MCB 0 BO NO BO NO TB TB 9 5 (OUTDOOR DAMPER SIGNAL) (EXT_ALARM_SIGNAL) NOTES TO FIELD: ALL FIELD MOUNTED RELAYS MUST HAVE VAC CLASS COILS THE TOTAL VA OF THE FIELD MOUNTED RELAYS CAN NOT EXCEED 5 VA V SRC MCB 0 (OPEN) BO5 5NO TB 6 ACT COM 6 (AIR ECONO) V SRC MCB B06 6NO 0 (CLOSE) 69 FIELD MOUNTED V SRC MCB 0 (OPEN) BO NO PL0 PL0 (BYPASS CONTROL) H- H- H- H- ACT (BYPASS VALVE WATER REG) COM PL0 PL0 V SRC MCB BO NO 0 (CLOSE) PL0 H- PL0 H- FACTORY MOUNTED SOURCE 9-6 WIRED INTERNAL TO MOTHERBOARD SRC 9-6 V SRC 0 MCB 0 BO NO R6 R69 B C 9 TB (VAV_BOX_SIGNAL) V SRC MCB BO A NO 0 R V SRC MCB BO9 9NO 0 (STAGE #) ELECTRIC HEAT # 5A R /.6 T_N B 6C 0A A 05A A A A A A Schematic continues on next page. McQuay IM 0-

35 Electrical Data Figure : Control output schematic, water regulator valve/airside economizer (continued) SOURCE 9-6 WIRED INTERNAL TO MOTHERBOARD SRC 9-6 V SRC 0 0 (CLOSE) MCB 0 BO NO A Schematic continues on next page. R6 R69 B C 9 TB (VAV_BOX_SIGNAL) V SRC MCB BO A NO 0 R V SRC MCB BO9 9NO 0 (STAGE #) ELECTRIC HEAT # 5A R V SRC MCB BO0 A 0 0NO 0 (STAGE #) R6_ ELECTRIC HEAT # R V SRC MCB BO R 0A 0B HDN NO 0 5 (CLOSE/DECR.) HC V SRC MCB BO A HUP NO 0 (OPEN/INCR) R 5 R (EMERGENCY FAN START SWITCH) TB TB A 6 (OPEN FOR NORMAL OPERATION) T_V (EMERGENCY FAN STOP SWITCH) TB /.0 (OPEN FOR NORMAL OPERATION) 6 9A R6 0 R A R A PL 9 H55-9 HLA H55- PL R 55A 55C 5 M A A 0 PL H5-0 HLA H5- PL R 5A 5B M A A A R A T_COM / McQuay IM 0-

36 Electrical Data Figure : Control output schematic, waterside economizer /.6 T_5VAC L 5V L V X X 0A TBC CLASS 0B TBC 0 9 T GRD SOURCE - WIRED INTERNAL TO MOTHERBOARD SRC - 0 V SRC MCB R6 TB JPR REMOVE JUMPER BETWEEN TERMINALS 6 & FOR PIORITY STOP REMOVE JUMPER BETWEEN TERMINALS 5 & 5 FOR PIORITY START BO R TB TB TB 09B R6 NO V SRC (FAN OPERATION) MCB BO TB TB A NO 6 V SRC V SRC MCB MCB 0 BO NO BO NO TB TB 9 5 (OUTDOOR DAMPER SIGNAL) (EXT_ALARM_SIGNAL) NOTES TO FIELD: ALL FIELD MOUNTED RELAYS MUST HAVE VAC CLASS COILS THE TOTAL VA OF THE FIELD MOUNTED RELAYS CAN NOT EXCEED 5 VA V SRC MCB 0 (OPEN) BO5 5NO PL0 PL0 ACT H- H- H- H- COM (AIR ECONO) PL0 PL0 V SRC MCB B06 6NO 0 (CLOSE) PL0 5 H-5 PL0 H- FACTORY MOUNTED V SRC MCB 0 (OPEN) BO NO PL0 PL0 (BYPASS CONTROL) H- H- H- H- ACT (BYPASS VALVE WATER REG) COM PL0 PL0 V SRC MCB BO NO 0 (CLOSE) PL0 H-5 PL0 H- FACTORY MOUNTED SOURCE 9-6 WIRED INTERNAL TO MOTHERBOARD SRC 9-6 V SRC 0 MCB 0 BO NO R6 A B TB (VAV_BOX_SIGNAL) V SRC MCB BO A NO 0 R V SRC MCB BO9 TB VM TB 9NO 0 (STAGE #) COM 0 HOT WATER STEAM ACTUATOR /.6 T_N B 6C 0A A 05A A A A A Schematic continues on next page. McQuay IM 0-

37 Electrical Data Figure : Control output schematic, waterside economizer (continued) (CLOSE) SOURCE 9-6 WIRED INTERNAL TO MOTHERBOARD SRC 9-6 V SRC 0 MCB 0 BO NO Schematic continues on previous page. R6 A B TB V SRC MCB BO A NO 0 V SRC MCB BO9 TB 9NO 0 (STAGE #) V SRC MCB BO0 TB 0 0NO 0 (STAGE #) V SRC MCB BO NO 0 5 (CLOSE/DECR.) R 0A 0B V SRC MCB BO A NO 0 (OPEN/INCR) R 5 (EMERGENCY FAN START SWITCH) TB TB 6 (OPEN FOR NORMAL OPERATION) T_V (EMERGENCY FAN STOP SWITCH) TB /.0 (OPEN FOR NORMAL OPERATION) 6 9 9A VM HOT WATER STEAM ACTUATOR A (VAV_BOX_SIGNAL) R TB COM 0 R6_ HDN HC HUP R R6 0 R T_COM / McQuay IM 0-5

38 Control Panel Components Manual Motor Protector (MMP) The manual motor protector (MMP) provides coordinated branch circuit, short circuit protection, a disconnecting means, a motor controller, and coordinated motor overload protection. A short circuit indicator with manual reset is mounted along side of each MMP as a means to differentiate between a short circuit and overload trip conditions. The MMP trip points are factory set. Do not change unless the motor ampacity changes or the MMP is replaced with a new device with incorrect set point adjustment. Any other non-authorized trip point or set point adjustment voids all or portions of the unit s warranty. Authorized set point adjustment is accomplished as follows For motors with a.5 service factor, rotate the arrow on the dial to correspond to the motor FLA. See in Figure. For motors with a.0 service factor, multiply the motor FLA by 0.9; then rotate the arrow on the dial to correspond to that value. To reset a tripped MMP, clear the trip by rotating the knob counterclockwise to the OFF position; then rotate the knob clockwise to the ON position. See Figure,. WARNING If an overload or a fault current interruption occurs, check circuits to determine the cause of the interruption. If a fault condition exits, examine the controller. If damaged, replace it to reduce the risk of fire or electrical shock. Other MMP features: Three-position rotary operator: OFF-TRIP-ON See Figure. Lockout tagoutable rotary operator: turn the rotary operator to OFF, slide out the extension arm, and insert a lockout pin. Ambient compensated 0 F to +60 F Single-phase sensitivity: if one phase exceeds set point, all three phases open. Trip test: insert a 9/6" screw driver in the slot to simulate a trip. See in Figure. Figure : Manual motor protector Circuit Breaker Circuit breakers are installed upstream of all VFDs to provide short circuit protection. To reset a tripped circuit breaker: Clear the trip by rotating the lever down to the OFF position. See in Figure. Then rotate lever up to the ON position. See in Figure. WARNING If an overload or a fault current interruption occurs, check circuits to determine the cause of the interruption. If a fault condition exits, examine the controller. If damaged, replace it to reduce the risk of fire or electrical shock. Figure : Circuit breaker 6 McQuay Cat IM 0-

39 Control Panel Components Terminals The terminals are spring clamp type, which offer several advantages over screw terminals. They only require inserting (see in Figure 5) and clamping the stripped wire. The clamping is done by inserting a flat-bladed screw driver (up to 9/6" wide). See in Figure 5. Spring connection does not require torquing and resists vibration Easily identifiable terminal markers Built-in test ports on each terminal, up to. mm diameter See in Figure 5. Figure 5: Terminal connectors Phase Voltage Monitor (PVM) (see page 0) The phase voltage monitor is designed to help protect three-phase loads from damaging power conditions. A microprocessor-based voltage and phase-sensing circuit constantly monitor the three-phase voltages to detect harmful power line conditions. When a harmful condition is detected, its output relay is deactivated after a specified amount of time (Trip Delay). The output relay reactivates after power line conditions return to an acceptable level for a specified amount of time (Restart Delay). The trip and restart delays prevent nuisance tripping due to rapidly fluctuating power line conditions. Other features: LED display to indicate status (see in Figure 6) Loss of phase High or low voltage Voltage unbalance Phase reversal Rapid cycling Standard to 500 second variable restart delay (see in Figure 6) Standard % to % variable voltage unbalance (see in Figure 6) Standard to 0 second trip delay (see in Figure 6) Figure 6: Phase voltage monitor McQuay IM 0-