AAON ProFit WH Series Installation Operation & Maintenance
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AAON ProFit WH Series Installation Operation & Maintenance

Horizontal water-source heat pump units
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Horizontal Water-Source Heat Pump Units
Installation, Operation
WARNING
If the information in this manual is not
followed exactly, a fire may result
causing property damage, personal
injury, or loss of life.
& Maintenance
WARNING
QUALIFIED INSTALLER
Improper
installation,
alteration, service, or maintenance
can cause property damage, personal
injury or loss of life. Startup and
service must be performed by a
Factory Trained Service Technician.
Keep a copy of this IOM with the unit.
ProFit
WH Series
adjustment,

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Summary of Contents for AAON ProFit WH Series

  • Page 1 ProFit WH Series Horizontal Water-Source Heat Pump Units Installation, Operation & Maintenance WARNING QUALIFIED INSTALLER Improper installation, adjustment, WARNING alteration, service, or maintenance can cause property damage, personal If the information in this manual is not injury or loss of life. Startup and followed exactly, a fire may result service must be performed by a causing property damage, personal...

  • Page 3: Table Of Contents

    Table of Contents AAON ProFit Features and Options Introduction ................5   Safety .............................. 6   WSHP Series Feature String Nomenclature ................. 10   General Information ........................12   Codes and Ordinances ......................12   Receiving Unit .......................... 13  ...
  • Page 4 Index of Tables and Figures Tables: Table 1 - Clearances ........................17   Table 2 - Glycol Concentration ....................21   Table 3 - Water Connections ......................22   Table 4 - Nameplate Voltage Markings & Tolerances ..............24   Table 5 - Control Wiring .......................

  • Page 5: Aaon Profit Features And Options Introduction

    AAON ProFit Features and Options Introduction Energy Efficiency Installation and Maintenance Direct Drive Supply Fan Color-Coded Wiring and Wiring   Scroll or Rotary Compressor Diagram  High Efficiency Electronically  Commutated (EC) Motor Environmentally Friendly Copper Coaxial Refrigerant-to-Water- R-410A Refrigerant ...

  • Page 6: Safety

    Safety Attention must be paid to the following statements: NOTE - Notes are intended to clarify the unit installation, operation and maintenance. CAUTION - Caution statements are given to prevent actions that may result in equipment damage, property damage, or personal injury. WARNING - Warning statements are given to prevent actions that could result in equipment damage, property damage, personal injury or death.
  • Page 7 Failure of the refrigerant-to-water heat Failure to follow safety warnings exchanger as a result of chemical exactly could result in dangerous corrosion is excluded from coverage operation, serious injury, death or under AAON Inc. warranties and the property damage. heat exchanger manufacturer’s warranties.
  • Page 8 Any damage to the equipment as a electrical components. Only result of water freezing is excluded qualified licensed electrician from coverage under AAON individual properly trained in handling warranties and the heat exchanger live electrical components must manufacturer warranties. perform these tasks. Standard NFPA-70E,...
  • Page 9 1. READ THE ENTIRE INSTALLATION, 3. The unit is for indoor use only. See OPERATION AND MAINTENANCE General Information section for more unit MANUAL. OTHER IMPORTANT information. SAFETY PRECAUTIONS PROVIDED THROUGHOUT THIS 4. Every unit has a unique equipment MANUAL. nameplate with electrical, operational, and unit clearance specifications.

  • Page 10: Wshp Series Feature String Nomenclature

    WSHP Series Feature String Nomenclature Unit Configuration Accessory Options 0 0 : 0 0 - 0 E WH B - 024 - C - 0 - 3 - 1 - - 0 0 - 0 0 - 0 0 0 0 0 - 0 A 0 0 0 MODEL OPTIONS Loop Type Generation and Orientation...
  • Page 11 WSHP Series Feature String Nomenclature Unit Configuration Accessory Options 0 0 - 0 0 - G 0 0 0 0 - 0 A 0 0 0 WH B - C - 0 - 3 - 1 - 0 0 0 : 0 0 - 0 E - 5: Service Disconnect 0 = Standard - 5 kAIC D = 5 kAIC Standard / 100 kAIC w/ Field Installed...

  • Page 12: General Information

    Codes and Ordinances General Information Units have been tested and certified, by ETL, in accordance with UL Safety Standard AAON ProFit Water-Source Heat Pump 1995/CSA C22.2 No. 236. units (WSHP) are designed for indoor installation only. Units are assembled, wired, System must be sized in accordance with the charged and run-tested at the factory.

  • Page 13: Receiving Unit

    Contact the AAON Warranty Department for assistance with handling During the cooling season, if the airflow is damaged goods, repairs, and freight claims: reduced due to dirty air filters or any other 918-382-6450.

  • Page 14: Wiring Diagrams

    Wiring Diagrams Unit specific wiring diagrams are affixed inside the control compartment panel.

  • Page 15: Installation

    (factory Installation provided) and 3/8” washers (field provided) and as shown in Figure 3. AAON equipment has been designed for quick and easy installation. Before startup of the unit, check the supply Threaded Rod blower and remove the foam shipping block...

  • Page 16: Condensate Drain Piping

    Note: Ductwork must supported condensate line p-trap. Other installation independently from the unit. The unit must provisions may be necessary according to job not support supply and/or return ductwork. specifications. It is recommended that a vibration isolation Allow adequate service clearances as shown pad be used when floor mounting a unit on the unit nameplate and unit drawing.

  • Page 17: Figure 6 - Drain Trap

    The total height from the trap inlet to the top of the bottom bend of the trap must be 2” minimum. The height from top of the bottom bend of the trap to the bottom of the leaving pipe must be at least equal to 1”.

  • Page 18: Blower Assembly Removal - Side Access

    Blower Assembly Removal – Side Access 1) Using a ” socket, remove the shipping screw on the outside of the right or discharge side of the unit as shown in the figure below. Figure 8 - Blower Assembly with Captive Panel 2) Remove the side blower access panel by lifting the panel upwards about ½”...

  • Page 19: Lifting And Handling The Unit

    6) Once the blower assembly is clear of the WARNING blower panel, turn the blower assembly, 90 degrees, counter clockwise. UNIT HANDLING Caution: At any time, DO NOT rest Incorrect lifting can cause damage to blower assembly on bottom access panel, the unit, injury or death.

  • Page 20: Refrigerant-To-Water Heat Exchanger Water Piping

    OPEN LOOP APPLICATIONS WARNING Failure of the refrigerant-to-water heat exchanger as a result of chemical OPEN LOOP APPLICATIONS corrosion is excluded from coverage under AAON Inc. warranties and the Cupronickel refrigerant-to-water heat heat exchanger manufacturer’s exchangers must be used with all warranties.
  • Page 21 Water Temperature safety for the unit. to-water heat exchanger is excluded from AAON will not be responsible for frozen coverage under AAON warranties and the coaxial coils due to improper selection of heat exchanger manufacturer warranties.
  • Page 22 Water loop piping runs through unheated Table 3 - Water Connections areas or outside the building must be Supply and insulated. Return Horizontal WSHP Connection Size Never operate the unit in heat pump mode (in. FPT) with a saturated suction temperature below 006, 009, 012, 015, 018 1/2”...
  • Page 23 design. Globe or gate valves must not be used CAUTION due to high pressure drops and poor throttling characteristics. WATER PIPING Pressure temperature ports Follow national and local codes when recommended in water supply and return installing water piping. Incorporate lines for system balancing.

  • Page 24: Electrical

    Electrical Verify the unit nameplate agrees with power supply. WSHP Series units are provided with single point power wiring connections. A complete set of unit specific wiring diagrams, showing factory and field wiring are located inside the controls compartment panel. Table 4 - Nameplate Voltage Markings &...
  • Page 25 Wire power leads to the unit’s contactor or Electrical supply can enter through the side main disconnect. All wiring beyond this point controls compartment where has been completed by AAON and cannot be knockouts and/or capped pre-cut holes have modified without effecting unit’s been provided.
  • Page 26 Thermostat Control Wiring CAUTION If a thermostat is used for unit control, locate thermostat on an inside wall 4-5 feet above Rotation must be checked on all the floor where it will not be subjected to MOTORS AND COMPRESSORS of drafts, sun exposure, or heat from electrical three phase units.

  • Page 27: Duct Connection

    1. The filter pull is located in the filter area Filter Pull Setup Do not operate the unit without filters in as shown in Error! Reference source place. Each unit has a filter pull located in the not found.. If necessary, from the SIDE filter section of the unit.
  • Page 28 Intake air enters the side of the units, where the air filters are located. The left or right hand return depends on feature selected when ordering the units. Ductwork must be sized in accordance with the ASHRAE Handbook. Ductwork must be installed in accordance with NFPA Standard 90A.

  • Page 29: Startup

    Startup Supply Fans Units are equipped with direct drive forward (See back of the manual for startup form) curved or backward curved plenum supply fan assemblies that deliver the air volume Operation Limits specified according to unit size and job Cooling Heating requirements.

  • Page 30: Adjusting Refrigerant Charge

    on the control board. The higher fan speed is CAUTION achieved by connecting Y from the thermostat to Y2 on the control board. Due to the charge-critical nature of these units, charge must only be Motor Tap RPMs adjusted if absolutely necessary. PSC Tap Speed Adjusting the charge of a system in the field...
  • Page 31 Convert the pressure obtained to a saturated Table 6 - Acceptable Refrigeration Circuit temperature using the appropriate refrigerant Values at AHRI ISO 13256 WLHP temperature-pressure chart. Conditions Water-Source Heat Pump Subtract the measured liquid line temperature Sub-Cooling 4-8°F from the saturated temperature to determine Superheat 8-15°F the liquid sub-cooling.
  • Page 32 Table 7 - R-410A Refrigerant Temperature-Pressure Chart °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG 78.3 134.7 213.7 321.0 463.2 80.0 137.2 217.1 325.6 469.3 81.8 139.7 220.6 330.2 475.4 83.6 142.2 224.1 334.9 481.6 85.4 144.8 227.7 339.6 487.8 87.2...

  • Page 33: Operation

    Storage Temperature main power supply, except for emergency or -4 to 158°F (-20 to 70°C) complete shutdown of the unit. Humidity (Storage and Operating) AAON WSHP Pioneer Silver Controller 0 to 95% RH non-condensing Part Number: V67470 Mounting & Dimensions Description...
  • Page 34 Pluggable Screw Terminal Block H5 24V = 24VAC power output for thermostat. NS_OV = Night setback override input. Input requires 24VAC to activate. O = Thermostat input for reversing valve operation. Input requires 24VAC to activate. COM = 24VAC common for thermostat power.

  • Page 35: Figure 14 - Pioneer Silver Controller Layout

    Figure 14 - Pioneer Silver Controller Layout Sequences of Operation Supply Fan Operation Compressor Operation Supply fan will enable upon receiving a The compressor will enable upon receiving a 24VAC input on the “G” terminal or a call for 24VAC input on the “Y” terminal or a compressor operation unless an alarm 24VAC input on the “TH_NS”...
  • Page 36 Reversing Valve Operation be overridden for 2 hours even if the signal is The reversing valve will enable if the removed. While night setback is overridden compressor has been operational for a the controller will respond to the normal minimum of 5 seconds. thermostat signals.
  • Page 37 Table 8 - LED Diagnostic Codes voltage decreases to 30VAC +/-5%. Once the fault is cleared the controller will activate Number Fault a random start delay. This alarm will disable of LED the compressor, the supply fan, and the Flashes reversing valve.
  • Page 38 Table 9 - Glycol Percentage Setpoints Leaving Water Leaving Water Switch 1 Switch 2 Glycol Temperature Temperature Position Position Percentage Alarm Alarm Activation Deactivation 35°F 40°F 10%* 30°F 35°F 23°F 28°F 15°F 20°F *Setting not recommended. 20% or more glycol solution is required if ambient temperatures are expected to fall below freezing or if the loop water temperature is below 50°F while operating in the heating mode.

  • Page 39: Maintenance

    High Discharge Pressure Alarm 24V signal across the reversing valve The high discharge pressure alarm will terminals. enable if the high pressure switch opens. This alarm will disable the compressor but Condensate Drain Pans allow the supply fan to operate. Drain pans will have moisture present and require periodic...

  • Page 40: Replacement Parts

    See Filter Information section for reference Tulsa, OK 74107 to the correct size and quantity of filters. Ph: 918-382-6450 techsupport@aaon.com Replacement Parts www.AAON.com Parts for AAON equipment may be obtained contacting your local AAON Note: Before calling, have the model and representative.
  • Page 41 Table 11 - 015 & 018 WH Series Unit Filters (B Cabinet) Feature 3B Quantity/Size (W x H x D) Type Pleated, MERV 8 (1) 25” x 16” x 2” Pleated, MERV 11 Pleated, MERV 13 Pleated, MERV 8 (1) 25” x 16” x 1” Pleated, MERV 11 Pleated, MERV 13 (1) 25”...
  • Page 42 Table 13 - 036 & 042 WH Series Unit Filters (D Cabinet) Feature 3B Quantity/Size (W x H x D) Type Pleated, MERV 8 (2) 14” x 20” x 2” Pleated, MERV 11 Pleated, MERV 13 Pleated, MERV 8 (2) 14” x 20” x 1” Pleated, MERV 11 Pleated, MERV 13 (2) 14”...

  • Page 43: Appendix A - Heat Exchanger Corrosion Resistance

    Appendix A - Heat Exchanger Corrosion Resistance Potential Range for Copper Heat Range for Cupro-Nickel Chemical(s) or Condition Problem Exchangers Heat Exchangers Calcium & Magnesium Scaling Less than 350 ppm Less than 350 ppm Carbonate pH Range Total Dissolved Solids Less than 1000 ppm Less than 1500 ppm Ammonia, Ammonium...
  • Page 44 WH Series Startup Form Job Name:____________________________________________ Date:____________ Address:____________________________________________________________________ ____________________________________________________________________________ Model Number:_______________________________________________________________ Serial Number:___________________________________________ Tag:____________ Startup Contractor:____________________________________________________________ Address:___________________________________________________________________ _______________________________________________________ Phone:____________ Pre Startup Checklist Installing contractor must verify the following items. 1. Is there any visible shipping damage? 2. Is the unit level? 3.
  • Page 45 Supply Fan Assembly Alignment Check Rotation Nameplate Amps________ Number Compressors/DX Cooling Only connect gauges for troubleshooting Check Rotation Head Suction Number Pressure Pressure PSIG PSIG Refrigeration System 1 - Cooling Mode Due to the charge-critical nature of these units, charge must only be adjusted if absolutely necessary Saturated Line...
  • Page 46 This log must be kept with the unit. It is the responsibility of the owner and/or maintenance/service contractor to document any service, repair or adjustments. AAON Service and Warranty Departments are available to advise and provide phone help for proper operation and replacement parts.
  • Page 47 Literature Change History July 2022 First Version...
  • Page 48 Parts: For replacement parts please contact your local AAON Representative. It is the intent of AAON to provide accurate and current product information. However, in the interest of product improvement, AAON reserves the right to change pricing, specifications, and/or design of its product without notice, obligation, or liability.

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