Carrier Aquazone 50PEC09 Installation, Start-Up And Service Instructions Manual
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Carrier Aquazone 50PEC09 Installation, Start-Up And Service Instructions Manual

Carrier Aquazone 50PEC09 Installation, Start-Up And Service Instructions Manual

Water source heat pumps console unit with puron advance refrigerant (r-454b)
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Installation, Start-Up and Service Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 1 - Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . 2
Step 2 - Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 3 - Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 4 - Make Electrical Connections . . . . . . . . . . . 6
Hose Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 6 - Install Condensate Piping . . . . . . . . . . . . 11
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
System Cleaning and Flushing . . . . . . . . . . . . . . . . 11
System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . 14
Exchanger Well Systems . . . . . . . . . . . . . . . . . . . 14
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Unit Protection Module (UPM) . . . . . . . . . . . . . . . . . 17
UPM Standard Safeties and Alarms . . . . . . . . . . . . 19
Units with Options . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
UNIT-MOUNTED CONTROLLER . . . . . . . . . . . . . . . . 26
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 28
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1
IMPORTANT: Read the entire instruction manual before start-
ing installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the litera-
ture, tags and labels attached to the unit, and other safety precau-
tions that may apply.
Improper installation, adjustment, alteration, service, mainte-
nance, or use can cause explosion, fire, electrical shock or other
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500416-01
Printed in U.S.A.
Form No. 50PEC-7SI
Water Source Heat Pumps Console Unit
with Puron Advance™ Refrigerant (R-454B)
conditions which may cause personal injury or property damage.
Consult a qualified installer, service agency, or your distributor for
Page
information or assistance. The qualified installer or service agency
must use factory-authorized kits or accessories when modifying
this product. Refer to the individual instructions packaged with the
kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher
available. Read these instructions thoroughly and follow all warn-
ings or cautions attached to the unit. Consult local building codes
and applicable electrical codes for special installation
requirements.
RISK OF FIRE
Flammable Refrigerant Used - To be repaired only by trained
service personnel. DO NOT puncture refrigerant tubing.
RISK OF FIRE
The appliance shall be stored in a room without continuously
operating ignition sources (for example: open flames, an oper-
ating gas appliance or an operating electric heater).
RISK OF FIRE
Flammable Refrigerant Used - Dispose of properly in accor-
dance with federal or local regulations.
Electrical shock can cause personal injury or death. Before in-
stalling or servicing system, always turn off main power to sys-
tem. There may be more than one disconnect switch. Turn off
accessory heater power if applicable.
Aquazone™
50PEC09-18
WARNING
WARNING
WARNING
WARNING
Pg 1
1-25
Replaces: 50PEC-6SI

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  • Page 1: Table Of Contents

    Aquazone™ 50PEC09-18 Water Source Heat Pumps Console Unit with Puron Advance™ Refrigerant (R-454B) Installation, Start-Up and Service Instructions conditions which may cause personal injury or property damage. CONTENTS Consult a qualified installer, service agency, or your distributor for Page information or assistance. The qualified installer or service agency SAFETY CONSIDERATIONS .

  • Page 2: General

    Keep both the chassis and cabinet covered with the shipping WARNING carton until all plastering, painting, and finish work is com- plete and it is time to install the chassis and cabinet. DO NOT USE TORCH to remove any component. System Verify that the refrigerant tubing is free of kinks or dents, and contains oil and refrigerant under pressure.

  • Page 3: Unit Protection

    of pipes stored on the jobsite. In areas where painting, plastering, or the spraying of fireproof material has not been completed, all CAUTION due precautions must be taken to avoid physical damage to the units and contamination by foreign material. Physical damage and DO NOT stack units.
  • Page 4 Right Hand Water Left Hand Water Connections Connections Left Hand Water Connections Water Out Electrical Box Water In Condensate Water Right Hand Water Connections Electrical Box Water In Water Out Condensate Water UNIT SIZE Cabinet End Grilled Edge Control Door Discharge Clearance to Sub-base...
  • Page 5 Table 1 — Physical Data 50PEC UNIT SIZE COMPRESSOR TYPE (QTY 1) Rotary Rotary Rotary Rotary Refrigeration Charge (oz) 21.5 24.5 Max Water Working Pressure 450/3100 450/3100 450/3100 450/3100 (psig/kPa) Number of Refrigeration Circuits EVAPORATOR COIL Coil Type Tube-Fin Tube-Fin Tube-Fin Tube-Fin Air Coil Dimensions (H x L)

  • Page 6: Step 3 - Mount Unit

    Step 3 — Mount Unit Before installing the unit, examine each pipe, fitting and CAUTION valve; remove any dirt or debris found on or in these compo- nents. Use care when installing the system components to Use only copper conductors for field-installed electrical wir- avoid damage to the cabinet finish or chassis.
  • Page 7 FAN MOTOR SPEED TABS - 3 POLE MOTORS FAN MOTOR SPEED TABS - 4 POLE MOTORS UNIT CAPPED UNIT CAPPED CAPPED UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION CONDENSATE OVERFLOW FAULT BROWN OUT FAULT EVAPORATOR FREEZE CONDITION REFRIGERANT LEAKAGE Fig.
  • Page 8 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION CONDENSATE OVERFLOW FAULT BROWN OUT FAULT EVAPORATOR FREEZE CONDITION REFRIGERANT LEAKAGE FAN MOTOR SPEED TABS - 4 POLE MOTORS FAN MOTOR SPEED TABS - 3 POLE MOTORS UNIT CAPPED CAPPED...
  • Page 9 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION CONDENSATE OVERFLOW FAULT BROWN OUT FAULT EVAPORATOR FREEZE CONDITION REFRIGERANT LEAKAGE FAN MOTOR SPEED TABS - 4 POLE MOTORS FAN MOTOR SPEED TABS - 3 POLE MOTORS UNIT CAPPED CAPPED...
  • Page 10 S1-Rx Rnet + EQUIPMENT TOUCH S2-Tx BLACK DEVICE S2-Rx Rnet - Carrier TruVu STANDARD FACTORY INSTALLED COMPONENTS (INPUTS): Prog IN-2 - UNIVERSAL INPUT 2: Comm i-Vu Ready [ ] LWTS - LEAVING WATER TEMPRATURE SENSOR IN-3 - UNIVERSAL INPUT 3:...

  • Page 11: Step 5 - Install Supply And Return Piping

    Follow the instructions below to properly clean and flush the tep 5 — Install Supply and Return Piping system: The following items should be adhered to in addition to applicable Verify that electrical power to the units is disconnected, and piping codes.

  • Page 12: System Checkout

    Table 3 — 50PEC Series WSHP Operating Limits FLUID TYPE LIMIT COOLING HEATING Minimum Ambient (°F) Maximum Ambient (°F) Rated Ambient (°F) Minimum Entering (°F db / wb) 65/57 Maximum Entering (°F db / wb) 95/85 Rated Entering (°F) 80/67 68/57 Minimum Entering (°F) Max Entering (°F)
  • Page 13 Table 4 — Water Quality Guidelines CLOSED CONDITION OPEN LOOP AND RECIRCULATING WELL MATERIAL RECIRCULATING Scaling Potential — Primary Measurement Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below. pH/Calcium pH < 7.5 and Ca Hardness, <100 ppm Hardness Method Index Limits for Probable Scaling Situations (Operation outside these limits is not recommended.) Scaling indexes should be calculated at 150 F for direct use and HWG applications, and at 90 F for indirect HX use.

  • Page 14: Antifreeze

    These systems typically use a common loop maintained at 60 to Turn the thermostat to the lowest setting. 90°F. Carrier recommends using a closed circuit evaporative cool- Set the thermostat switch to “HEAT”. ing tower with a secondary heat exchanger between the tower and 10.
  • Page 15 Table 5 — Operating Temperatures and Pressures COOLING HEATING ENTER FLUID WATER 50PEC Suction Discharge Water Air Temp Suction Discharge Water Air Temp TEMP FLOW UNIT SIZE Pressure Pressure Temp Drop Pressure Pressure Temp Rise (°F) (GPM) (psig) (psig) Rise °F °F (psig) (psig)
  • Page 16 Table 5 — Operating Temperatures and Pressures (cont) COOLING HEATING ENTER FLUID WATER 50PEC Suction Discharge Water Air Temp Suction Discharge Water Air Temp TEMP FLOW UNIT SIZE Pressure Pressure Temp Drop Pressure Pressure Temp Rise (°F) (GPM) (psig) (psig) Rise °F °F (psig)

  • Page 17: Sequence Of Operation Of Units Without Ddc

    OPERATION Table 6 — Approximate Fluid Volume (gal.) Sequence of Operation of Units Without DDC per 100 ft of Pipe Controller PIPE DIAMETER (in.) VOLUME (gal.) COOLING MODE Energizing the “O” terminal energizes the unit reversing valve in Copper 1.25 the cooling mode.
  • Page 18 START RESET ON R RESET ON Y1 = ON R = 24VAC POWER/ SWITCHES/SENSOR CLEAR FAULTS STATUS CHECK BLINK CODE ON STATUS LED SOFT LOCKOUT COUNTER V > 18VAC RECORD ALARM NEEDED? START COUNTER (IF APPLICABLE) CNT = CNT+1 HPC = CLOSED LOCKOUT CAN BE SET COUNT = 2...

  • Page 19: Upm Standard Safeties And Alarms

    UPM Standard Safeties and Alarms HI AND LOW REFRIGERANT PRESSURE PROTECTION • High-pressure switch located in the refrigerant discharge line and wired across the HPC (High-Pressure Switch Connection) terminals on the UPM. • Low-pressure switch located in the unit refrigerant suction line and wired across the LPC (Low-Pressure Switch Con- nection) terminals (LPC1 and LPC2) on the UPM.
  • Page 20 Brownout/Surge/Power Interruption Protection The brownout protection in the UPM board will shut down the compressor if the incoming power falls below 18 vac. The com- pressor will remain Off until the voltage is above 18 vac and Anti- Short Cycle Timer (300 seconds) times out. The unit will not go into a hard lockout.

  • Page 21: Units With Options

    Units with Options Sequence of Operation for Units with TruVu DDC Controller UPM board can be ordered with additional following options: Units with TruVu™ DDC controller still feature a UPM board for ENERGY MANAGEMENT SWITCH unit operation, so the operation will be similar to the sequence for Enables 24 VAC external signal to control the operation of the units without DDC controller.

  • Page 22: Cooling Operation

    SCHEDULING INDOOR FAN Time periods can be configured to schedule the transitions from Fan Modes occupied to unoccupied operation. The time periods control the You can configure the indoor fan to operate in any one of 3 fan space temperature to occupied heating and cooling setpoints. The modes: unit operates continuously in the Occupied mode until a time •...

  • Page 23: Heating Operation

    • If economizer cooling is available and active, and the econo- controlled so the SAT does not exceed the Maximum Heating mizer alone is insufficient to provide enough cooling. SAT limit. • OAT > Cooling Lockout Temperature if OAT is available. The same conditions required for Reverse Cycle Heating must be true in order for the Auxiliary Heat algorithm to run.

  • Page 24: Compressor Status

    COMPRESSOR STATUS Air Coil Freeze Alarm (UPM Alarm) The TruVu WSHP monitors the status of an air coil freeze fault The TruVu™ controller provides a status input to monitor the condition via the serial port (S1). The fault condition is determined compressor operation.
  • Page 25 Source Water Temperature Alarm Source Water Linkage Failure Alarm (if Source Water Link- age was active) The control has 4 configurable alarm limits for source water temperature. The control verifies that the water temperature is The control generates a Source Water Linkage failure alarm if within operating range (between high and low limits) for the Linkage fails after once being active.

  • Page 26: Unit-Mounted Controller

    within configured ranged (between high and low limits) for the specific operating mode (heating or cooling) before energizing the compressor. Entering Water Temperature Alarm The control has 4 configurable alarm limits for Entering Water temperature. The control verifies that the entering water temperature is within operating range (between high and low limits) for the specific op- erating mode (heating or cooling) before energizing the compres- sor.
  • Page 27 Hot Gas Line Water Coil Freeze Sensor (unit mounted controller) Air Flow Condenser Water Coil FS2 Air Coil Freeze Sensor Distributor (Complete C and D Package) Equalizer Line Expansion Line FS1 Water Coil Freeze Sensor Solenoid (Complete C and D Package) Sensing Reversing Bulb...

  • Page 28: Troubleshooting

    Periodic lockouts almost always are caused by air or water flow TROUBLESHOOTING problems. The lockout (shutdown) of the unit is a normal protec- Troubleshooting Checks and Correction column in Table 10 may tive measure in the design of the equipment. If continual lockouts reflect a possible fault that may be one of, or a combination of occur, call a technician immediately and have them check for: wa- causes and solutions.
  • Page 30 © 2025 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500416-01 Printed in U.S.A. Form No. 50PEC-7SI Pg 30 1-25 Replaces: 50PEC-6SI...

  • Page 31: Start-Up Checklist

    50PEC UNIT START-UP CHECKLIST NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sec- tions of this Installation, Start-Up and Service document.

  • Page 32: Heating Cycle Analysis

    *Look up pressure drop in Fig. 7 to determine flow rate. †Use 500 for water, 485 for antifreeze. © 2025 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

This manual is also suitable for:

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