Page 1: Table Of Contents
Aquazone™ 50PCH, PCV, PCD007-070 Compact Water Source Heat Pumps ® with Puron Refrigerant (R-410A) Installation, Start-Up, and Service Instructions Page CONTENTS Filters ......... . . 36 Page Condensate Drain Pans .
Page 2: General
Recognize safety information. This is the safety-alert 2. Be sure the installation location is isolated from sleeping symbol ( ). When you see this symbol on the unit and in areas, private offices and other acoustically sensitive instructions or manuals, be alert to the potential for personal spaces.
Page 3 4. Verify that the refrigerant tubing is free of kinks or dents, 6. Remove the blower shipping support from underneath the and that it does not touch other unit components. blower. 5. Inspect all electrical connections. Be sure connections are 7.
Page 4 Table 2 —Physical Data — 50PCH,PCV,PCD Units 036-070 50PCH,PCV,PCD UNIT CuNi CuNi CuNi CuNi CuNi CuNi COMPRESSOR (1 each) Reciprocating Scroll Maximum Water Working Pressure (psig) PSC FAN MOTOR AND BLOWER PSC/3 Fan Motor Type/Speeds PSC/3 Fan Motor (hp) Blower Wheel Size (Dia x W) (in.) 9 x 7 10 x 8 11 x 9...
Page 5 Return Air Opening Return Air Opening Condensate Drain Condensate Drain Compressor Electrical Access Knock-Outs Left Hand Return End Blow (FLE) Left Hand Return Straight Through (FLS) NOTE: Models 048 and 060 Left Hand Return units have condenser water connections on the front right and electrical knockouts on the front left. Return Air Return Air Opening...
Page 6 Access Panels Condenser Water Out Condenser Water In Condensate Electrical Drain Connections Left Hand Return Right Hand Return Return Air (Filter) View Blower Blower Access 18" Minimum 24" Optimum Compressor Access and Electrical/Control Access Compressor 24" Minimum 36" Optimum Electrical Control Front of Unit Service Clearances...
Page 7 Compressor Access Condenser Water Out Upper Rack Adjustable Up 1" Condenser Water In Electrical Knock-Outs Condensate Blower Access Drain Left Hand Return Right Hand Return Return Air (Filter) View Compressor Access and Electrical/Control Access 24" Minimum Compressor 36" Optimum Electrical Control Blower Access 18"...
Page 8: Step 3 - Locate Unit
Locate the unit in an indoor Step 3 — Locate Unit — area that allows easy removal of the filter and access panels, and has enough room for service personnel to perform mainte- nance or repair. Provide sufficient room to make fluid, electri- cal, and duct connection(s).
Page 9: Vertical And Downflow Units (50Pcv,Pcd)
ceiling joists by additional layers of vibration absorbing mesh. In both cases, a -in. drain connected to this secondary pan CAUTION should be run to an eave at a location that will be noticeable. Do not connect discharge ducts directly to the blower out- let.
Page 10 The depth of the trap depends on the amount of positive or negative pressure on the drain pan. A second trap must not be included. The horizontal unit should be pitched approximately -in. towards the drain in both directions, to facilitate conden- sate removal.
Page 11: Step 7 - Pipe Connections
Optional pressure-rated hose assemblies designed specifi- • Avoid all plastic to metal threaded fittings due to the cally for use with Carrier units are available. Similar hoses can potential to leak. Use a flange fitted substitute. be obtained from alternate suppliers. Supply and return hoses •...
Page 12: Step 8 - Wire Field Power Supply
For heat pumps with unit mounted disconnect switches, Fig. Step 8 — Wire Field Power Supply — field power should be connected to the marked terminals on the 12-18 for typical wiring diagrams. See Tables 6 and 7 for addi- disconnect switch.
Page 20 Table 6 — 50PC Electrical Data with PSC Blower Motor RATED COMPRESSOR BLOWER MOTOR 50PC VOLTAGE VOLTAGE MIN CIRCUIT MAX FUSE/ VOLTAGE UNIT CODE MIN/MAX HACR V-PH-HZ 208/230-1-60 197/253 17.7 0.96 0.10 265-1-60 238/292 13.5 0.96 0.10 208/230-1-60 197/253 22.2 0.96 0.10 265-1-60...
Page 21: Low Voltage
Table 7 — 50PC Electrical Data with Constant Torque ECM Blower Motor RATED COMPRESSOR BLOWER MOTOR 50PC VOLTAGE VOLTAGE MIN CIRCUIT MAX FUSE/ VOLTAGE UNIT CODE MIN/MAX HACR V-PH-HZ 0.33 208/230-1-60 197/253 0.33 265-1-60 238/292 0.33 10.9 208/230-1-60 197/253 0.33 265-1-60 238/292 0.33...
Page 22: Step 9 - Wire Field Controls
IMPORTANT: Exceptionally long runs of thermostat wire should be avoided to prevent voltage drops in the control circuit. HOT GAS REHEAT CONTROL — Units with hot gas re- heat (HGRH) will include an additional H terminal on the im- put terminal board for dehumidification control. To enable a call for dehumidification, a 24V signal must be sent to the H terminal with no voltage applied to the Y1 or O terminals.
Page 23 Table 9 — UPM Board Fault Blink Codes WARNING FAULT FAULT CRITERIA BLINKS If unit is employing a fresh water system (no anti-freeze None All fault conditions nominal protection), it is extremely important to have the Freeze1 Refrigerant discharge R30 resistor set to 30°F in order to shut down the unit at the High Pressure pressure has exceeded 600 psig...
Page 24 on the board. The UPM board will constantly monitor the re- IMPORTANT: If 24 VAC output is needed R must be frigerant temperature with the sensor mounted close to the con- wired to ALR-COM terminal; 24 VAC will be available o densing water coil between the thermal expansion valve and the ALR-OUT terminal when the unit is in the alarm con- water coil.
Page 25 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 26: Pre-Start-Up
11. Verify that the blower shipping support has been PRE-START-UP removed. After completing the installation, System Checkout — 12. Verify that ductwork has been properly fastened to supply and before energizing the unit, the following system checks and return duct collars. should be made prior to initial startup: 13.
Page 27: Start-Up
Table 12 — 50PCH,PCV,PCD (015-070) Constant Torque ECM Motor Blower Performance AIRFLOW (cfm) AT EXTERNAL STATIC PRESSURE (in. wg) 50PCH, RATED TAP # PCV, PCD AIRFLOW 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 — — —...
Page 28: Scroll Compressor Rotation
5. Operate unit in the cooling cycle first, then the heating 3. The suction pressure should drop and the discharge cycle. Refer to Table 13 for unit operating limits. Al- pressure should rise, as is normal on any start-up. low 15 minutes between cooling and heating tests for If the suction pressure does not drop and the discharge pressure to equalize.
Page 29 Table 15 — 50PC009 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTERING WATER SUCTION DISCHARGE WATER AIR TEMP SUCTION DISCHARGE WATER WATER FLOW AIR TEMP PRESSURE PRESSURE TEMP DROP PRESSURE PRESSURE TEMP TEMP (°F) (GPM/TON) RISE (°F) (PSIG) (PSIG) RISE (°F) (°F) DB (PSIG)
Page 30 Table 17 — 50PC015 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTERING WATER SUCTION DISCHARGE WATER AIR TEMP SUCTION DISCHARGE WATER WATER FLOW AIR TEMP PRESSURE PRESSURE TEMP DROP PRESSURE PRESSURE TEMP TEMP (°F) (GPM/TON) RISE (°F) (PSIG) (PSIG) RISE (°F) (°F) DB (PSIG)
Page 31 Table 19 — 50PC024 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTERING WATER SUCTION DISCHARGE WATER AIR TEMP SUCTION DISCHARGE WATER WATER FLOW AIR TEMP PRESSURE PRESSURE TEMP DROP PRESSURE PRESSURE TEMP TEMP (°F) (GPM/TON) RISE (°F) (PSIG) (PSIG) RISE (°F) (°F) DB (PSIG)
Page 32 Table 21 — 50PC036 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTERING WATER SUCTION DISCHARGE WATER AIR TEMP SUCTION DISCHARGE WATER WATER FLOW AIR TEMP PRESSURE PRESSURE TEMP DROP PRESSURE PRESSURE TEMP TEMP (°F) (GPM/TON) RISE (°F) (PSIG) (PSIG) RISE (°F) (°F) DB (PSIG)
Page 33 Table 23 — 50PC048 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTERING WATER SUCTION DISCHARGE WATER AIR TEMP SUCTION DISCHARGE WATER WATER FLOW AIR TEMP PRESSURE PRESSURE TEMP DROP PRESSURE PRESSURE TEMP TEMP (°F) (GPM/TON) RISE (°F) (PSIG) (PSIG) RISE (°F) (°F) DB (PSIG)
Page 34: Unit Start-Up Heating Mode
Table 25 — 50PC070 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTERING WATER SUCTION DISCHARGE WATER AIR TEMP SUCTION DISCHARGE WATER WATER FLOW AIR TEMP PRESSURE PRESSURE TEMP DROP PRESSURE PRESSURE TEMP TEMP (°F) (GPM/TON) RISE (°F) (PSIG) (PSIG) RISE (°F) (°F) DB (PSIG)
Page 35: Antifreeze
VALVE (psi) typically use a common loop temperature maintained at 60 to 90°F. Carrier recommends using a closed circuit evaporative cooling tower with a secondary heat exchanger between the tower and the water loop. If an open type cooling tower is used continuously, chemical treatment and filtering will be necessary.
Page 36: Units With Wshp Open Controls
HOT GAS REHEAT (Optional) — Terminal H is active in dehumidification mode with hot gas reheat. After a call for H, WARNING the reversing valve (O), compressor (Y), and fan (G) are also enabled. To avoid injury and the discharge of refrigerant into the NOTE: Any call for cooling (Y), heating (Y or W), or revers- environment, all refrigerant discharged from this unit must ing valve (O) will override dehumidification mode (H).
Page 37: Condensate Drain Cleaning
Proper water treatment can minimize tube fouling and TANK pitting. If such conditions are anticipated, water treatment REMOVE WATER analysis is recommended. Refer to the Carrier System Design REGULATING VALVE Manual, Part 5, for general water conditioning information. RETURN FINE MESH...
Page 38: Air Coil Fan Motor Removal
operating pressures. Therefore, diagnosing TXV problems can Air Coil Fan Motor Removal be difficult. TXV FAILURE — The most common failure mode of a TXV CAUTION is when the valve fails while closed. Typically, a TXV uses Before attempting to remove fan motors or motor mounts, spring pressure to close the valve and an opposing pressure, place a piece of plywood over evaporator coils to prevent usually from a diaphragm, to open the valve.
Page 39 Causes of TXV Failure — The most common causes of TXV To determine that a TXV has failed, verify the following: failure are: • The suction pressure is low and the valve is non-respon- 1. A cracked, broken, or damaged sensing bulb or capillary sive.
Page 40 IMPORTANT: Repair of any sealed refrigerant system IMPORTANT: Due to the hygroscopic nature of the requires training in the use of refrigeration tools and proce- POE oil in Puron refrigerant (R-410A) and other envi- dures. Repair should only be attempted by a qualified ser- ronmentally balanced refrigerants, any component vice technician.
Page 41 Table 29 — Troubleshooting FAULT COOLING HEATING CHECK POSSIBLE CAUSE SOLUTION High Pressure fault - no or low Check water valves and/or pumps for proper opera- water flow tion. Check for water coil blockage. High Pressure fault - high Check water temperature - is it in range? water temperature High Pressure fault - fouled or Check for proper flow rate and water temperature, but...
Page 42 Table 29 — Troubleshooting (cont) FAULT COOLING HEATING CHECK POSSIBLE CAUSE SOLUTION Bad thermostat Check thermostat and wiring. Check unit terminal Power LED on connection / faulty block for 24 VAC between " Y" and " C" and " G" and thermostat "...
Page 43 Table 29 — Troubleshooting (cont) FAULT COOLING HEATING CHECK POSSIBLE CAUSE SOLUTION Fan speed setting too Consult blower performance table and reduce fan Airflow too high high speed if possible. Loss of refrigeration Low refrigerant Check refrigerant pressures with gage set. capacity High humidity Check unit performance against building load calcula-...
Page 44: Manufacturer Reserves The Right To Discontinue, Or Change At Any Time, Specifications Or Designs Without Notice And Without Incurring Obligations
© Carrier Corporation 2018 8733952368 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500191-01 Printed in U.S.A. Form 50PC-5SI Pg 44 9-18 Replaces: 50PC-4SI...
Page 45: 50Pch,Pcv,Pcd
50PCH,PCV,PCD START-UP CHECKLIST (Remove and use for job file.) 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 preced- ing sections of this Installation Instruction document.
Page 46 TEMPERATURES FILL IN THE ANALYSIS CHART ATTACHED. COAXIAL HEAT COOLING CYCLE: EXCHANGER FLUID IN FLUID OUT FLOW HEATING CYCLE: FLUID IN FLUID OUT FLOW AIR COIL COOLING CYCLE: AIR IN AIR OUT HEATING CYCLE: AIR IN AIR OUT HEATING CYCLE ANALYSIS SUCTION COIL COMPRESSOR...
Page 47 HEAT OF EXTRACTION (ABSORPTION) OR HEAT OF REJECTION = FLOW RATE (GPM) x TEMP. DIFF. (DEG. F) x FLUID FACTOR* = (Btu/hr) SUPERHEAT = SUCTION TEMPERATURE – SUCTION SATURATION TEMPERATURE (DEG F) SUBCOOLING = DISCHARGE SATURATION TEMPERATURE – LIQUID LINE TEMPERATURE (DEG F) *Use 500 for water, 485 for antifreeze.
Page 48 8733952368 © Carrier Corporation 2018 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500191-01 Printed in U.S.A. Form 50PC-5SI Pg CL-4 9-18 Replaces: 50PC-4SI...

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