iseries Model SL Water Source Heat Pump 6 to 10 Ton

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1 iseries Model SL Engineering Submittal Sheet Overview and Certifications Standard Features, Factory Installed Options, and Field Installed Accessories Standard Features SL Model 072, 096 and Models from 6 through 10 tons Horizontal and Vertical Configurations Cabinet Cabinetry is constructed using heavy-gauge, G90 galvanized steel Quiet Operation All panels are insulated with ½" thick, 1.5 lb./cu.ft. density micromat fiberglass insulation for both thermal insulation and noise reduction Serviceability All units are designed to be serviced from the front of the unit Insulated bulkheads (vertical configuration only) allow the unit to be serviced during operation Unit Configurations All units are available in horizontal, vertical configurations 1 of 24 Filter Racks Units come standard with a 1" filter rack and construction filter Fan Motor The standard motor for all SL series heat pumps is a belt drive motor Angle Section Supports Horizontal units are equipped with angle section supports for hanging the unit. Field supplied spring or rubber isolation must be installed to isolate the unit from the building structure Water Connections All water connections are heavy duty copper FPT fittings securely fastened to the unit corner post Refrigerant Circuit SL units are designed using the optimum combination of compressor, water and copper aluminum-fin evaporator coils with TXV to provide peak performance. R-410A refrigerant

2 Standard Features, Factory Installed Options, and Field Installed Accessories continued.. Copper Coax Coil Compressor Monitor Relay ( 2 required) TXV (Thermal Expansion Valve) Improves refrigerant management and efficiencies Phase Protection Monitor 75 VA Transformer Wire for 208 Volt Standard Range (WLS / Towers / Boiler) Optional Filter Rack A 2" four-sided filter rack and pleated MERV 8 filter is optional and greatly improves air filtration Unit Protection Module Each SV unit is factory provided with a Unit Protection Module (UPM) that controls the unit operation and monitors the safety controls that protect the unit The UPM interfaces with the thermostat or direct digital controller Water and Air coil freeze protection Condensate Overflow Sensor Brown-out Protection Low and High Pressure Protection Hot Gas Bypass Modulating Hot Gas Bypass Hot Gas Reheat Passive Dehumidification Waterside Economizer Warranty 5 year compressor limited warranty 1 year parts limited warranty Cupro-nickel Coil: Recommended in conditions anticipating moderate scale formation or in brackish water Factory and Field Installed Options Pump Interlock Relay Helps ensure the external flow/pump center operates when unit is operating Boilerless Control DuoGuard Evaporator Coil Tin Electro-Plated Copper Tubing with High-Tech Polymer Coated Aluminum Fins will protect the evaporator coil from all forms of corrosive elements in the airstream Extended Range Option Vertical units only, standard on horizontal units. Includes insulated piping 100VA Transformer Differential Pressure Switch Closed Cell Foam Insulation (Coming Soon) Fire Alarm Relay DDC Controls The factory and field installed DDC Controller is preprogrammed and installed in the unit with the Unit Protection Module The unit will operate in a 100% stand-alone control mode or connect to a Building Automation System (BAS) using open protocols BACnet, Modbus and N2 EMS Relay Energy management relay to tie into a building's energy management system Blower Monitor Relay 2 of 24

3 Model Nomenclature SL SL VT C - S B S I U A - X X T A X X X X X 1 X X X X 6 X Size Voltage /60/ /60/ /60/ /60/3 Cabinet Configuraon VT - Vercal HZ - Horizontal Motor HP (Belt Drive Only) A VT, HZ B VT C HZ, 120 VT D HZ AIR FILTRATION 1 - Standard Throw Away 3-2" 4 Sided Filter Rack with 1" Filter Open Economizer X - None E - Economizer With 3 Way Valve and Controls Water Flow Control Opon X - None Coax Opons C - Copper N - Cupro-Nickel x - No Condenser Water Connecons F - Front S - Side X - N/A Return Air Configuraon B - Back F - Front L - Le Discharge Air Configuraon T - Top F - Front R - Rear S - Straight Through Fan/Motor Opons B - Belt Drive Air Coil U - Uncoated D - DuoGuard Revision Level A - Current Controls X - Standard M - DDC - Mul-Protocol (BacNET, Modbus, N2) L - DDC - LonWorks Transformer 7-75 VA Standard VA Opon Refrigeraon Circuit Opons X - None H - Hot Gas Reheat - On/Off B - Hot Gas Bypass M - Modulang Hot Gas Reheat General Electrical Opons (up to 5 available per unit) A - EMS relay B - Blower Monitor Relay C - Compressor Monitor Relay D - Phase Monitor E - Pump/valve relay G - Boilerless control H - Differenal proving switch K - Fire Alarm Relay/Dual Power M - Wire to 208 V X - As default for non used electrical codes Applicaon T - TXV Opon G - EXTENDED RANGE W/ SCHRADER VALVE (Geothermal) Electric Heat X - None Cabinet Construcon A - G90 Steel / 1/2" Standard 1.5LB Dual Density Fiberglass C - G90 Steel / 1/2" Closed Cell Foam 3 of 24

4 AHRI/ANSI Capacity and Efficiency Data Models Water Flow (GPM) Water Loop Ground Water Ground Loop Cooling (86 F) Heating (68 F) Cooling (59 F) Heating (50 F) Cooling (77 F) Heating (32 F) Capacity (Btuh) EER (Btuh/W) Capacity (Btuh) COP Capacity (Btuh) EER (Btuh/W) Capacity (Btuh) COP Capacity (Btuh) EER (Btuh/W) Capacity (Btuh) COP Physical Data Description Unit Value Compressor Type (Qty 1) Reciprocating Reciprocating Scroll Refrigeration Charge Oz Max Water Working Pressure PSIG/kPa 450/ / /3100 Number of Refrigeration Circuits Evaporator Coil Coil Type Tube-Fin Tube-Fin Tube-Fin Air Coil Dimensions Vertical H x L 18 x 28 (2) 20 x 32.5 (2) 20 x 32.5 (2) Air Coil Dimensions Horizontal H x L 18 x 28 (2) 20 x 32.5 (2) 20 x 32.5 (2) Row(s) Motor & Blower Fan Motor Type/Speeds Belt Drive/1 Belt Drive/1 Belt Drive/1 Fan Motor HP 1 1 1/2 (Vertical Units) 2 (Horizontal Units) 2 (Vertical Units) 3 (Horizontal Units) Blower Wheel Size Dia. x W x Qty 12 x 12 x 1 12 x 12 x 1 12 x 9 x 2 Water Connection Type FPT FPT FPT Size 1" 1" 1 1/4" Water Coil Type Coaxial Coaxial Coaxial Coaxial Coil Volume (gal) gal Vertical Cabinet Nominal size of Standard Filter - 1" H x L 20 x 34.5 (2) 20 x 34.5 (2) 20 x 34.5 (2) Weight - Operating lbs Weight - Shipping lbs Horizontal Cabinet Nominal size of Standard Filter - 1" H x L 20 x 34.5 (2) 20 x 34.5 (2) 20 x 34.5 (2) Weight - Operating lbs Weight - Shipping lbs of 24

5 Operating Limits - Cooling & Heating Description Standard Unit Extended Range Option COOLING Minimum ambient air temperature F Maximum ambient air temperature F Minimum evaporator entering air db/wb F 68/57 68/57 Rated air coil entering air db/wb F 80/67 80/67 Maximum evaporator entering air db/wb F 95/85 95/85 Minimum water coil entering fluid temperature F Water loop typical coil entering fluid range temperature F 70/90 70/90 Maximum water coil entering fluid temperature F HEATING Minimum ambient air temperature F Maximum ambient air temperature F Minimum evaporator entering air db F Rated air coil entering air F Maximum evaporator entering air db F Normal water coil entering fluid range F Minimum water coil entering Fluid F 50 20* * antifreeze solution is required at these fluid temperatures. Electrical Data - Belt Drive Motor Compressor Total Unit w/ Belt Drive Motor Compressor Service Model Voltage Code Voltage/ Phase/Hz Voltage Min/Max QTY RLA (each) LRA (each) Motor Qty FLA Min Circuit Amps Max Fuse/ HACR Cold Winding Resistance (Ω) Single Phase: R-C Single Phase: S-C Three- Phase: Line-Line Run Capacitor (μf/v) /1/60 197/ / /3/60 197/ /3/60 414/ /1/60 197/ / / / / /3/60 197/ / / / /3/60 414/ / / / /3/60 518/ / / / /1/60 197/ / /3/60 197/ / / / /3/60 414/ / / / /3/60 518/ / / / * First value is for vertical configurations and second value is for horizontals. * Resistance value tolerance +/- 7%. All resistance values must be measured with compressor at room temperature.. 5 of 24

6 Blower Performance Drive Belt Motor Model Motor Sheave Rated Airflow Available External Static Pressure (in. wc. Wet coil and filter included) Closed Half Open 2, Open Closed Half Open 2, Open Closed Half Open 4, Open Horizontal Cabinet Corner Weights Configuration Left Hand Evaporator Right Hand Evaporator Model Unit Total Left Front* Right Front* Left Back Right Back Left Front* Right Front* Left Back Right Back Lbs kg Lbs kg Lbs kg * Front is control box end 6 of 24

7 SL Vertical Single Blower Large Commercial Unit Configurations Front Return Optional Blower Orientation ( ) Standard Blower Orientation Blower Access Blower & Motor Access Blower & Motor Access Condenser Water Out Condensate Drain Condenser Water In Blower Motor Orientation Controls, Compressors, Refrigeration Components Access Electrical Connections Top Supply (FFT) Rear Supply (FFR) Rear Return Blower Motor Orientation Condenser Water Out Condensate Drain Condenser Water In Blower Access Blower & Motor Access Blower Motor Orientation Blower Access Blower & Motor Access Optional Blower Orientation ( ) Controls, Compressors, Refrigeration Components Access Electrical Connections Top Supply (FBT) Front Supply (FBF) 7 of 24

8 SL Horizontal Large Commercial Unit Configurations Controls, Compressors Access Electrical Box Condensate Drain Electrical Connections Condenser Water Out Compressors, Refrigeration Components Access Condenser Water Out Compressors, Refrigeration Components Access Condenser Water In Condenser Water In Blower Motor Orientation Condensate Drain Blower & Motor Access Blower Motor Orientation Condensate Drain 072, 096 (SLS Only) 120 (SLS Only ) Overall Dimensions Model Unit of Measure Vertical Cabinet Horizontal Cabinet Width Depth Height Width Depth Height in mm in mm in All dimensions within +/ 0.125". Specifications subject to change without notice. 8 of 24

9 SL Vertical Dimensions and Connections Front Return p Orientation Standard Blower Orientation Rear Return Top Supply (FFT) Standard Blower Orientation Rear Supply (FFR) Optional Blower Orientation ( ) Top Supply (FBT) Front Supply (FBF) SL Vertical Dimensions and Connections Model Width Depth Height Distance Between Base Rails Top Supply: Supply Depth Top Supply: Supply Width Top Supply: Front to Supply Top Supply: Left Side to Supply Rear Supply: Supply Height Rear Supply: Supply Width Rear Supply: Top to Supply Rear Supply: Right Side to Supply SL Vertical Dimensions and Connections Continued Model A B C "R/A Bottom to Duct Water Out Water In Condensate Drain Width" D E "Condenser "R/A Duct Flange "Filter Rack Water Height" Height" Connections" Condensate Drain Connection "Recommended Replacement Filter Size - 1" "thick" '' FPT 3/4" FPT 20 x 34.5 (2) '' FPT 3/4" FPT 20 x 34.5 (2) /4'' FPT 3/4" FPT 20 x 34.5 (2) 9 of 24

10 SL Horizontal Dimensions and Connections 072, SL SL Horizontal Horizontal Dimensions Dimensions and and Connections Connections Model Width Depth Height A B C Cab End to Filter Rack Filter Rack Height R/ADuct Flange Height R/A Duct Width E Front to Water In F Water In Height SL Horizontal Dimensions and Connections Continued Model G H J K L M Front to Water Out Water Out Height Supply Width Supply Height Rear to Supply Distance b/t Supply Ducts Condenser Water Connections Condensate Drain Connection Recommended Replacement Nominal Filter Size - 1"" thick" '' FPT 3/4" FPT 20 x 34.5 (2) '' FPT 3/4" FPT 20 x 34.5 (2) /4'' FPT 3/4" FPT 20 x 34.5 (2) 10 of 24

11 SL Vertical - Service Clearances *Blower Wheel/Housing 18" Minimum 24" Optimum Blower *Blower Motor Sheave/Pulley/Belt Access 18" Minimum 24" Optimum Compressor Accesss and Electrical/Control Access 36" Minimum Compressor Electrical Control Box * Rear Return Air Pattern shown. For Front Return Air, blower motor and blower housing access is on the LEFT HAND SIDE of the unit SL Horizontal - Service Clearances Electrical/Compressor Access 36" Minimum Electrical Control Box Air Coil Compressors Blower Blower Motor Compressor/Refrigerant Access 36" Minimum 11 of 24

12 SL072 Cooling Performance Data - Full 2300CFM Entering Water Temp F Water flow GPM Pressure Drop (FOH) Pressure Drop (PSI) Ent. Air db/wb, F Total Sensible Ht. Rej. Unit kw EER 75/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / of 24

13 SV007 (300 CFM) Capacity Data SL072 Heating Performance Data - Full 2300CFM Entering Water Temp F Water flow GPM Pressure Drop (FOH) Pressure Drop (PSI) Ent. Air db/wb, F Total Ht. Abs. Unit kw COP of 24

14 SL096 Cooling Performance Data - Full 2800CFM Entering Water Temp F Water flow GPM Pressure Drop (FOH) Pressure Drop (PSI) Ent. Air db/wb, F Total Sensible Ht. Rej. Unit kw EER 75/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / of 24

15 SL096 Heating Performance Data - Full 2800CFM Entering Water Temp F Water flow GPM Pressure Drop (FOH) Pressure Drop (PSI) Ent. Air db/wb, F Total Ht. Abs. Unit kw COP of 24

16 SL120 Cooling Performance Data - Full 4000CFM Entering Water Temp F Water flow GPM Pressure Drop (FOH) Pressure Drop (PSI) Ent. Air db/wb, F Total Sensible Ht. Rej. Unit kw EER 75/ / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / of 24

17 SL120 Heating Performance Data - Full 4000CFM Entering Water Temp F Water flow GPM Pressure Drop (FOH) Pressure Drop (PSI) Ent. Air db/wb, F Total Ht. Abs. Unit kw COP of 24

18 Antifreeze Correction Antifreeze Type Antifreeze % Cooling Heating EWT 90 Deg.F EWT 30 Deg. F Total Cap. Sens. Cap Power Htg. Cap Power WPD Correction Factor EWT 30 F Water Propylene Glycol Methanol Ethanol Ethylene Glycol Sound Data Model Octave Band Sound Power Levels db, re Watts Center Frequency - Hz Overall A weighted overall (dba) ARI-260:2001 (100hz-10kHz) VT HZ * Data is based on blower only manufacturer's data. * Overall calculated using Hz octave bands. 18 of 24

19 Field Installed Accessory - Duct Mounted Electric Heaters 208/230V Kilowatt Heater - 208/230V Part Number Nominal Dimensions (inches) Duct Flange Connection (Inches) Min. CFM Required Duct Heater 5 kw x x Duct Heater 5 kw x x Duct Heater 5 kw x x Duct Heater 5 kw x x Duct Heater 10 kw x x Duct Heater 10 kw x x Duct Heater 10 kw x x Duct Heater 15 kw x x Duct Heater 20 kw x x It is recommended to use a seven (7) conductor cable for thermostat interface. In fiber glass duct systems, a metal sleeve MUST be used to support the heater. It is required for the duct mounted heater to have an independent power supply. 19 of 24

20 Field Installed Option - Communicating Thermostats Model/Order Number: Description: TSTBT4H2CPHM - KA TSTBT4H2CP - M - KA Features: 4 stages of heat, 2nd stage latching, Low temp alert, High temp alert, Inefficient heating and cooling operation alerts Application: Communicating Thermostat Kit w/ Humidity Control Communicating Thermostat Kit Warranty: 5 Year Limited Warranty Communicating Thermostat Accessories Model/Order Number: Description: ZONB - OTS M - - A ZONB - LAS M - - A Features: Wired Outdoor Temperature Sensor Leaving Air and/or Return Air Sensor Field Installed Option - 24V Conventional Thermostat Model/Order Number: Description: Features: TSTBM3H2CPH6W - A Smoke detection, Semi-wireless, Filter change/clean notification, Programmable fan Application: Warranty: If smoke is detected in ducting, unit will stop, preventing circulation of smoke to other rooms. 5 Year Limited Warranty 24V Conventional 24V Thermostat Conventional Accessories Thermostat Accessories Model/Order Number: Description: TSTBM - RRS - - TW - A TSTBM - OTS - - TW - A Features: Wireless Remote Room Sensor Thermostat Wireless Outdoor Temperature Sensor Field Installed Option - Smoke Detector Model/Order Number: Description: SMKB A SMKB - 02FST A Features: Duct Smoke Detector 2 Foot Air Sampling Tube Application: Warranty: If smoke is detected in ducting, unit will stop, preventing circulation of smoke to other rooms. Manual reset is required which let's customer know there was an occurrence. 5 Year Limited Warranty on Parts 20 of 24

21 Field Installed Option - Bosch Humidifiers Model/Order Number: Description: HUMBXSBP12H6 - - A HUMBXLBP17H6 - - A Features: Small Bypass Humidifier, Manual Summer/Winter Damper, Humidistat included Large Bypass Humidifier, Manual Summer/Winter Damper, Humidistat Included Application: 12 Gallons per Day 17 Gallons per Day HUMBSBP-12H6--A HUMBSBP-17H6--A Warranty: 1 Year Limited Warranty on Humidifer Pad 5 Year Limited Warranty on Assembly Field Installed Option - Bosch Photo Catalytic Oxidizer (PCO) Model/Order Number: Description: PCOB A PCOB A Features: 9" UVC Light Bulb 14" UVC Light Bulb Application: up to 1500 CFM units or House up to 2000 sq. ft. up to 2400 CFM units or House up to 4700 sq. ft. Warranty: 1 Year Limited Warranty on Bulb 2 Year Limited Warranty on Ballast 5 Year Limited Warranty on Assembly Field Installed Option - Bosch Fresh Air Damper (FAD) Model/Order Number: Description: FADB A FADB A FADB A Size 4" Fresh Air Damper 5" Fresh Air Damper 6" Fresh Air Damper Features: Variable Capacity Control (settings from 0 to 100 of available CFM) Variable Position Damper Included Variable Position Control Included Vent Hood with Screen Included Application: A minimum of 70 CFM of fresh air from outside up to 1300 sq. ft. home A minimum of 110 CFM of fresh air from outside up to 2100 sq. ft. home A minimum of 150 CFM of fresh air from outside up to 3000 sq. ft. home Warranty: 5 Year Limited Warranty on Assembly 21 of 24

22 Factory Installed Options and Applicable Models Description 100VA Transformer DuoGuard Coil coating Closed Cell Insulation EMS Relay Blower Monitor Relay Compressor Monitor Relay (1) Phase Protection Monitor Fan/Pump Interlock Relay Boilerless Control Differential Pressure Switch Fire Alarm Relay Wire for 208 Volt Hot Gas Bypass Hot Gas Reheat Modulating Hot Gas Reheat (2) DDC 7.03 with LonWorks Card DDC Option Water Side Economizer Applicable Model Numbers 4 Sided MERV-8 2" Filter Rack Extended Range (3) (1) Unit sizes require 2 each of these items. You must use a quantity of 2 when you price them. (2) When you order HGRH, you need to order Duct Stat # and Leaving Air Temperature Sensor # (not required when ordering DDC). (3) Vertical only. 22 of 24

23 Specification Guide 1.0 General Furnish and install water source heat pumps as indicated on the plans with capacities and characteristics as listed in the schedule and the specifications that follow. The units shall be manufactured in an ISO 9001:2000 certified facility. 2.0 Horizontal/Vertical Water Source Heat Pumps Units shall be designed to operate throughout the range of entering fluid temperature of 50 F to 100 F in the cooling mode and 50 F to 80 F in the heating mode. Units shall have an operating range of 50 F to 110 F in the cooling mode and 25 F to 80 F in the heating mode when equipped with the optional extended range package. Equivalent units from other manufacturers can be proposed provided approval to bid is given 10 days prior to bid closing. All equipment with a nominal capacity of 135,000 BTUH Total Cooling or lower must be listed in the current AHRI Applied Equipment Directory under the AHRI Standard AHRI/ISO , WLHP, GWHP and GLHP certification points. All equipment in this section must meet or exceed the DOE mandated minimum EER s and COP s as listed in ASHRAE Basic Construction A. Units shall have the air flow arrangement as shown on the plans. If units with these arrangements are not used, the contractor supplying the water source heat pumps is responsible for any extra costs incurred by other trades and must submit detailed mechanical drawings showing ductwork requirements and changes or relocation of any other mechanical or electrical system. If other arrangements make servicing difficult the contractor must provide access panels and clear routes to ease service. The architect must approve all changes 10 days prior to bid. B. All units shall have stainless steel drain pans to comply with this project s IAQ requirements. Painted steel or plastic material shall not be permitted. C. All water source heat pumps shall be fabricated from heavy-gauge sheet metal steel. All interior surfaces shall be lined with 1/2 inch thick, multi density acoustic insulation. Insulation within the air handling section shall not have any exposed edges. All insulation must meet NFPA 90A and be certified to meet the GREENGUARD Indoor Air Quality Standard for Low Emitting Products. One blower access panel and two compressor compartment access panels shall be removable with supply and return air ductwork in place. D. Unit compressors shall have rubber isolators to reduce transmission of vibration to the structure. E. All units shall have a factory installed two sided filter rack capable of accepting one inch filters. Units shall have a 1 inch thick throwaway type glass fiber filter as standard. The filter rack shall incorporate a 1 inch duct flange. The contractor shall purchase one spare set of filters and replace factoryshipped filters upon completion of start-up. F. Cabinets shall have separate holes and knockouts for entrance of line voltage and low voltage control wiring. Supply and return water connections shall be copper FPT fittings and shall be securely mounted flush to the cabinet allowing for connection to a flexible hose without the use of a back-up wrench. Water connections which protrude through the cabinet shall not be allowed. G. Condensate overflow protection shall be provided as standard for horizontal units Fan and Motor Assembly A. The fan(s) shall be belt driven DWDI forward curved type with dynamically balanced wheel(s). The fan motor(s) shall be 1725 or 3450 RPM 56 frame sealed ball bearing type. The motor(s) shall be permanently lubricated and have thermal overload protection. B. The fan and motor assembly must be capable of overcoming the external static pressures as shown on the schedule. External static pressure rating of the unit shall be based on a wet coil. Ratings based on a dry coil shall NOT be acceptable. 23 of Refrigerant Circuit Units shall use R-410A refrigerant. Units that use R-22 refrigerant shall not be allowed. All units shall have a factory sealed and fully charged refrigerant circuit with the following components: A. Hermetic compressor: Hermetic reciprocating, or scroll compressors shall be specifically designed for R-410A refrigerant and shall be internally sprung (if reciprocating), externally isolated and with thermal overload protection. B. Refrigerant metering thermal expansion valves. C. Finned tube refrigerant to air heat exchanger. Refrigerant to air heat exchangers shall utilize enhanced aluminum fins and rifled copper tube construction rated to withstand 600 PSIG refrigerant working pressure. All air coils shall have non-ferrous aluminum end plates. Option for refrigerant to air coils to have Duo-Guard coating for enhanced protection against formicary and other corrosion. Copper tubes shall be tin coated and aluminum fins coated to pass 1000 hour ASTM B117 salt fog testing. D. Reversing valve. Reversing valves shall be four way solenoid activated refrigerant valves which shall fail to the heating operation should the solenoid fail to function. Reversing valves which fail to the cooling operation shall not be allowed. E. Coaxial (tube in tube) refrigerant to water heat exchanger. Refrigerant to water heat exchangers shall be of copper inner water tube and steel outer refrigerant tube design rated to withstand 600 PSIG working refrigerant pressure and 400 PSIG working water pressure. Shell and Tube style refrigerant to water heat exchangers shall be treated as pressure vessels and shall require refrigerant pressure relief valves piped to the exterior of the building. The contractor supplying the water source heat pumps with Shell and Tube heat exchangers shall be responsible for any additional installation costs. Brazed Plate water to refrigerant heat exchangers shall require additional centrifugal separators added to the supply water piping at each unit. Each separator shall have an automated clean out valve piped to a waste line. The contractor supplying water source heat pumps with Brazed Plate heat exchangers shall be responsible for any additional costs. Option for E: Cupro-Nickel water coil The refrigerant to water heat exchanger shall be of cupro-nickel inner water tube construction. F. Safety controls including both a high pressure and low pressure switch shall be provided on both circuits. Temperature sensors shall not replace these safety switches. See the controls section of this specification for additional information. G. Access fittings shall be factory installed on high and low pressure refrigerant lines to facilitate field service. H. Activation of any safety device shall prevent compressor operation via a lockout circuit, in the affected circuit. The lockout circuit shall be reset at the thermostat or at the contractor supplied disconnect switch. Units which may be reset at the disconnect switch only shall not be acceptable. Refer to solid state safety circuit below. A condensate alarm shall prevent both compressors from operating Electrical A control box shall be located within the unit and shall contain a transformer, controls for the compressor, reversing valve and fan motor operation and shall have a terminal block for low voltage field wiring connections. The transformer shall be rated for a minimum 75 VA. All units shall be name-plated for use with time delay fuses or HACR circuit breakers. Unit controls shall be 24 volts Solid State Safety Circuit All units shall have a solid-state UPM safety control circuit with the following features: 1. Anti-short cycle time delay on compressor operation. 2. Random start on power up mode. 3. Brown out/surge/power Interruption protection. 4. Low Pressure Switch 120 second bypass timer.

24 Specification Guide Continued 5. Shutdown on high or low refrigerant pressure safety switch. 6. Standard Evaporator Freeze Stat 7. Standard Condenser/Water Coil/Coaxial Heat exchanger Freeze Stat 8. Condensate overflow sensor will hard shut down upon first trip.. 9. Alarm output which closes for selectable dry contact closure or 24 VAC remote fault indication. 10. Alarm output selectable for constant output for general alarm notification, or pulse output for annunciation of the specific fault alarm. 11. Reset unit at thermostat or disconnect. 12. Automatic intelligent reset. Unit shall automatically reset after a safety shut down and restart the unit after the anti-short cycle timer and random start timer expire. Should a fault re-occur within 60 minutes after reset, then a permanent lockout will occur. Reset attempts shall be selectable for either 2 or 4 tries. 13. Ability to defeat time delays for servicing. 14. A light emitting diode (LED) to indicate safety alarms shall be provided for each circuit. The LED shall annunciate the following alarms: high refrigerant pressure, low refrigerant pressure, low water temperature, a high level of condensate in the drain pan, or brown out/surge/ power interruption. The LED will display each fault condition as soon as the fault occurs. If a permanent lockout occurs, then the fault LED will display the type of fault until the unit is reset. 15. UL listed, CUL listed, and RFI, ESD, and transient protected Options: A. Extra quiet construction: Optional compressor blankets shall be provided on units, for additional attenuation. B. Hot Gas Reheat: Units as noted on the schedule shall be equipped with optional Hot Gas Reheat (HGRH). HGRH shall be either on/off control or modulating as noted in the specifications. On/Off HGRH shall be controlled by a humidistat connected to the unit H terminal and shall start the unit in the reheat mode should the humidity be above set point once the thermostat control is satisfied. Cooling or heating requirements shall take precedent over HGRH. Modulating Hot Gas Reheat (MHGRH) shall be active during the cooling mode. A 0-10 VDC signal from a sensor located in the unit discharge air supply shall modulate the hot gas valve to maintain an adjustable preset leaving air temperature to the conditioned space. C. Hot Gas Bypass: For units as noted on the schedule, supply each unit with a UL listed and MEA listed modulating hot gas bypass valve with factory supplied and installed controls to prevent air coils from frost development by taking hot gas and bypassing the water coil and expansion device and reintroducing the hot gas into the refrigerant line prior to the air coil. The hot gas bypass valve shall maintain a minimum refrigerant suction pressure to allow for a light load cooling mode or a low entering air temperature cooling mode. D. Water Differential Switch. Prevents unit operation if there is no fluid flow. E. Water Side Economizer: water side economizer shall be completely installed at the factory, with condensate drain pan(s), motorized 3 way valve, aqua stat, and all internal electric controls. Water side economizer shall be rated at 400 psi and UL listed for application with the heat pump. F. Factory-installed control options: phase loss and reversal protection 3.0 Hose Kits All units shall be connected with hoses. The hoses shall be either 2 or 3 feet long, braided stainless steel, fire rated hoses complete with adapters. Non fire rated hoses are not acceptable. Optional ball valves with P/T ports, flow controller, Y strainer and electric valve shall be in included as specified in the schedule. 24 of 24