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Heat Pumps with Puron Advance™ Refrigerant (R-454B)
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 3
• INSPECTION
• STORAGE
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . 7
• HORIZONTAL UNITS
• VERTICAL UNITS
• INSTALLATION GUIDELINES (ALL UNITS)
Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 7
• INSPECT UNIT
Step 3 — Locate Unit . . . . . . . . . . . . . . . . . . . . . . . . 11
• PROTECTION
Step 4 — Mount the Unit . . . . . . . . . . . . . . . . . . . . . . 11
• DUCT FLANGES
• HORIZONTAL UNITS
• VERTICAL UNITS
Step 5 — Check Duct System . . . . . . . . . . . . . . . . . 12
• HORIZONTAL SUPPLY AIR CONFIGURATION
CONVERSION
Step 6 — Install Condensate Drain . . . . . . . . . . . . . 14
• HORIZONTAL UNITS
• VERTICAL UNITS
Step 7 — Pipe Connections . . . . . . . . . . . . . . . . . . . 14
• WATER QUALITY GUIDELINES
• INSTALLING SUPPLY AND RETURN HOSE KIT
• UNITS WITH BOILERLESS HEAT CONTROL
• UNITS WITH HOT WATER GENERATOR OPTION
(HEAT RECOVERY PACKAGE/DESUPERHEATER)
• INITIAL START-UP
• UNITS WITH WATERSIDE ECONOMIZER
Step 8 — Wire Field Power Supply . . . . . . . . . . . . . 18
• HIGH VOLTAGE WIRING
• ELECTRIC HEATER
• LOW VOLTAGE, CONTROL WIRING
• ECM INTERFACE THERMOSTAT CONNECTIONS
• THERMOSTAT AND DDC SENSORS
• ADDITIONAL CONTROLS OPTIONS WIRING
Step 9 — Configure Unit Control Components . . . 24
• UNIT PROTECTION MODULE (UPM)
UPM Standard Safeties and Alarms . . . . . . . . . . . . 25
• HI AND LOW REFRIGERANT PRESSURE
PROTECTION
• WATER COIL FREEZE PROTECTION
• AIR COIL FREEZE PROTECTION
• HIGH CONDENSATE LEVEL SHUTDOWN
• INTELLIGENT ALARM RESET
• HARD LOCKOUT RESET
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500449-01
Printed in U.S.A.
Single Stage High Efficiency Sizes 007-018 and
Two Stage Compact Sizes 024-070 Water Source
Installation, Start-Up, and
Service Instructions
Form No. 50WD-1SI
• OPTION CARD
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
• CLEAN AIR COIL
• CONSTANT TORQUE (ECM) MOTOR
• CONSTANT AIRFLOW (ECM) MOTOR
System Flushing and Filling . . . . . . . . . . . . . . . . . . .49
System Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
• FLOW VERIFICATION
• FLOW REGULATION
• ANTIFREEZE
• FREEZE PROTECTION SELECTION
• START-UP
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
• ENVIRONMENT
• POWER SUPPLY
• UNIT STARTING CONDITIONS
Start-Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . .51
• COOLING MODE START-UP
• HEATING MODE START-UP
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Unit Protection Module (UPM) . . . . . . . . . . . . . . . . .59
Constant CFM Dehumidification . . . . . . . . . . . . . . .59
Option Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Sequence of Operation of Units Without DDC
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
• STANDBY
• COOLING
• HOT GAS REHEAT WITH OPTION CARD (OPTIONAL)
• WATERSIDE ECONOMIZER WITH OPTION CARD
(OPTIONAL)
• AUXILIARY ELECTRIC HEAT (OPTIONAL)
• TWO-POSITION MOTORIZED ISOLATION VALVE
(2-WAY SOLENOID VALVE) (OPTIONAL)
• BOILERLESS HEAT WITH OPTION CARD
(OPTIONAL)
• DIFFERENTIAL PRESSURE SWITCH / FLOW SWITCH
(OPTIONAL)
• REFRIGERANT LEAK DETECTION SYSTEM
(OPTIONAL)
• COMPRESSOR RELAY (OPTIONAL)
• PUMP/VALVE RELAY (OPTIONAL)
Sequence of Operation for Units with TruVu DDC
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
• SCHEDULING
• INDOOR FAN
• COOLING OPERATION
• HEATING OPERATION
• WATERSIDE ECONOMIZER
Indoor Air Quality and Demand Controlled
Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Pg 1
Aquazone™
50WD 007-070
12-24
Replaces: NEW
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Summary of Contents for Carrier Aquazone 50WD 007
- Page 1 Aquazone™ 50WD 007-070 Single Stage High Efficiency Sizes 007-018 and Two Stage Compact Sizes 024-070 Water Source Heat Pumps with Puron Advance™ Refrigerant (R-454B) Installation, Start-Up, and Service Instructions • OPTION CARD CONTENTS PRE-START-UP ......45 SAFETY CONSIDERATIONS .
- Page 2 Carrier-approved models exclu- damage. Consult a qualified installer, service agency, or your sively. Carrier bears no responsibility for the installation of distributor or branch for information or assistance. The qualified any alternative auxiliary devices installed in the field.
- Page 3 IMPORTANT: Read the entire instruction manual before WARNING starting installation. Electrical shock can cause personal injury and death. Shut off PRE-INSTALLATION all power to this equipment during installation. There may be more than one disconnect switch. Lockout/tagout all discon- INSPECTION nect locations to alert others not to restore power until work is Upon receipt of shipment, carefully check the shipment against completed.
- Page 4 – Design Revision (16) A = Initial Release Model Series (1-2) 50 = Packaged WSHP Unit Miscellaneous Options (15) – = None Tier (3-4) A = Waterside Economizer (WSE) WD = 1-Stage Size 07-18 (high efficiency) B = A2L Leak Detection (LD) WD = 2-Stage Size 24-70 (compact) C = WSE + LD Hydronic Options (14)
- Page 5 Table 1 — Physical Data — 50WD 007-024 Units UNIT SIZE Compressor Type (Qty 1) Rotary Rotary Rotary Rotary Rotary Scroll Max Water Working Pressure (psig) ECM FAN MOTOR and BLOWER Fan Motor Type Constant Torque Constant Torque Constant Torque Constant Airflow Constant Airflow Constant Airflow Fan Motor (hp) 0.25 0.25...
- Page 6 Table 2 — Physical Data — 50WD 030-070 Units UNIT SIZE Compressor Type (Qty 1) Scroll Scroll Scroll Scroll Scroll Scroll Max Water Working Pressure (psig) ECM FAN MOTOR and BLOWER Fan Motor Type Constant Airflow Constant Airflow Constant Airflow Constant Airflow Constant Airflow Constant Airflow Fan Motor (hp) 0.50...
- Page 7 Carrier’s recommended service clearances and for installation. See Tables 1 and 2 for unit physical data. installation instructions. Please refer to the Carrier Commercial WSHP Warranty Statement (document number 04-570008-01) HORIZONTAL UNITS for details on warranty exclusions regarding equipment, access, Horizontal units are designed for indoor installation only.
- Page 8 Refrigeration Access Access Panels Water Control Electrical Connections Access Water In Condensate Drain Return Air Opening Right Hand Return Right Hand Return Front Left Side Right Hand Return Straight Through End Blow Water Connections (left discharge) (back discharge) Access Refrigeration Panels Access Water...
- Page 9 Access Panels Access Panels Refrigeration Refrigeration Access Access Water Out Water Out Control Control Electrical Access Access Connections Condensate Drain Condensate Drain Water In Water In Left Hand Return Right Hand Return Return Air (Filter) View Front Right Side Front Left Side Water Connections Water Connections VERTICAL DIMENSIONS (in.)
- Page 10 Vertical Unit Left Return, Top Discharge Left Return, Top Discharge Blower Front Access 18 in. Minimum 24 in. Optimum Compressor and Electrical Front Access 24 in. Minimum 36 in. Optimum Side View Front View Horizontal Unit Left Return, Right Discharge Left Return, Back Discharge Blower Access 18 in.
- Page 11 Step 3 — Locate Unit Locate the unit in an indoor area that allows easy removal of the filter and access panels, and has enough room for service personnel to perform maintenance or repair. Provide sufficient room to make fluid, electrical, and duct connection(s). If the unit is located in a confined space such as a closet, provisions must be made for return air to freely enter the space.
- Page 12 Hanging Bracket Installation should be set in a full size secondary drain pan on top of a vibra- tion absorbing mesh. Remove and discard factory-provided screws from location where hanging brackets will be installed. (see Fig. 7). The secondary drain pan prevents possible condensate overflow or water leakage damage to the ceiling.
- Page 13 CAUTION Do not connect discharge ducts directly to the blower outlet. The factory filter rack should be left in place on a free return system. If the unit will be installed in a new installation with new ductwork, the installation should be designed using current ASHRAE (American Society of Heating, Refrigerating, and Air- Conditioning Engineers) procedures for duct sizing.
- Page 14 A second trap must not be included. Carrier recommends proper testing to assure the well water quality The horizontal unit should be pitched approximately 1/4 in. to- is suitable for use with water source equipment. In conditions an-...
- Page 15 Table 3 — 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 at 90°F for indirect HX use.
- Page 16 Optional pressure-rated hose assemblies designed specifically for 3/8 in. wall closed cell insulation. Install isolation valves on use with Carrier units are available. Similar hoses can be obtained supply and return to the hot water generator. See Fig. 17. from alternate suppliers. Supply and return hoses are fitted with NOTE: Diagram is for illustration purposes only.
- Page 17 Water Tank Refill Ensure the temperature difference between the water entering and leaving the heat recovery is 5 to 15°F. Open the cold water supply to the tank. Allow the unit to operate for 20 to 30 minutes to ensure it is Open a hot water faucet to vent air from the system until functioning properly.
- Page 18 disconnect switches (except units with dual power supply), power Step 8 — Wire Field Power Supply is connected to the line (L) side of the compressor contactor and See Fig. 26-41 for typical wiring diagrams. See Tables 5-11 for the ground lug in the unit electrical box. additional electrical data.
- Page 19 Table 5 — 50WD without Electric Heat — Constant Torque ECM Blower Motor Electrical Data COMPRESSOR BLOWER MOTOR VOLTAGE / Hz / VOLTAGE TOTAL UNIT SIZE MOCP PHASE MIN/MAX UNIT FLA Quantity 208-230/1/60 197/253 17.0 0.25 15.0 265/1/60 238/292 12.0 0.25 15.0 208-230/1/60...
- Page 20 Table 7 — First Data Plate for Units with Electric Heater (EH) Option — Compressor Power Connection COMPRESSOR VOLTAGE/ Hz / VOLTAGE 50WD UNIT SIZE PHASE MIN/MAX 208-230/1/60 197/253 208-230/1/60 197/253 10.3 10.3 12.8 208-230/1/60 197/253 14.6 14.6 18.2 208-230/1/60 197/253 14.6 14.6...
- Page 21 Table 9 — Second Data Plate for Units with 10 kW Electric Heater (EH) Option and Constant Airflow ECM Motor 10 kW Electric Heater BLOWER MOTOR Heater Element 2nd Data Plate Values 50WD UNIT VOLTAGE/ VOLTAGE SIZE Hz/ PHASE MIN/MAX Watts Amps 208-v...
- Page 22 Table 11 — Second Data Plate for Units with 20 kW Electric Heater (EH) Option and Constant Airflow ECM Motor 20 kW ELECTRIC HEATER BLOWER MOTOR Heater Element 2nd Data Plate Values 50WD UNIT VOLTAGE/ VOLTAGE SIZE Hz/ PHASE MIN/MAX Watts Amps 208-v...
- Page 23 LOW VOLTAGE, CONTROL WIRING ECM INTERFACE THERMOSTAT CONNECTIONS Control wiring for units with Constant Torque blower motors are • Y1 First Stage Compressor Operation connected to a terminal block located in the unit electrical box. • Y2 Second Stage Compressor Operation Refer to the unit wiring diagram for connection details.
- Page 24 TruVu DDC Controller Component TruVu is a factory installed DDC control that requires the use of Compressor Monitor Relay Carrier ZS or non-communicating sensors or the Carrier TruVu Blower Monitor Relay Equipment touch interface for space temperature sensing. TruVu Energy Management Relay DDC is not compatible with thermostats.
- Page 25 LEGEND 1 — Compressor Contact Output 2 — High-Pressure Switch Connection 3 — Call for Compressor (Y1) 4 — Low Pressure Switch Connection 5 — Water Coil Freeze Connection (Freeze 1) 6 — UPM Status LED Indicator (Fault Status) 7 — Air Coil Freeze Connection (Freeze 2) 8 —...
- Page 26 up or after a power interruption, in order to avoid creating a large electrical spike. Low-Pressure Bypass Timer If the compressor is running and the low pressure switch opens, the controller will keep the compressor On for 120 seconds. After two minutes if the low-pressure switch remains open, the control- lers will shut down the compressor and enter a soft lockout.
- Page 27 OPTION CARD Table 14 — UPM Fault Blink Codes Units ordered with the water side economizer or hot gas reheat BLINKS FAULT FAULT CRITERIA factory installed options and no factory installed DDC controller None None All fault conditions normal. will include the Option Card as standard (see Fig. 25). Refrigerant discharge pressure High Pressure The card has three primary functions:...
- Page 28 Cool Set Point Potentiometer Heat Set Point Potentiometer Operating Mode Dip Switch Entering Water Temperature H Signal Input O Signal Input Y Call Input LED Input Status Economizer Output “E_OUT” Hot Gas Reheat Output “H_OUT” Boilerless Control “W_OUT” Reversing Valve Output “O_OUT” Option Card Standoff LED Output Status FAN Output “G_OUT”...
- Page 29 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 8733841664 Fig. 26 — Single Phase, Constant Torque ECM Motor, Standard Single Stage Unit (0.5 - 1 tons)
- Page 30 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 8733841665 Fig. 27 — Single Phase, Constant Torque ECM Motor, Option Card (WSE, HGRH, Boilerless Heat), Single Stage (0.5 - 1 tons)
- Page 31 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 8733841670 Fig. 28 — Single Phase, Constant Torque ECM Motor, TruVu™ DDC (0.5 - 1 tons)
- Page 32 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION TO ECM MOTOR CONDENSATE OVERFLOW FAULT ADJUST BROWN OUT FAULT NORM EVAPORATOR FREEZE CONDITION TEST REFRIGERANT LEAKAGE HGRH THERMOSTAT R C G O Y1 Y2 W1 W2 H C 8733841682 Fig.
- Page 33 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT TO ECM MOTOR LOW PRESSURE FAULT CONDENSER FREEZE CONDITION ADJUST NORM CONDENSATE OVERFLOW FAULT TEST BROWN OUT FAULT HGRH EVAPORATOR FREEZE CONDITION THERMOSTAT R C G O Y1 Y2 W1 W2 H C REFRIGERANT LEAKAGE 8733841683 Fig.
- Page 34 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION CONDENSATE OVERFLOW FAULT BROWN OUT FAULT TO ECM MOTOR EVAPORATOR FREEZE CONDITION REFRIGERANT LEAKAGE ADJUST NORM TEST HGRH THERMOSTAT R C G O Y1 Y2 W1 W2 H C HEATER PACKAGE WIRE HARNESS PLUG CONNECTED TO MAIN CONTROL BOX NOTE: L1 AND L2 PROVIDE POWER TO...
- Page 35 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION CONDENSATE OVERFLOW FAULT TO ECM MOTOR BROWN OUT FAULT EVAPORATOR FREEZE CONDITION ADJUST NORM REFRIGERANT LEAKAGE TEST HGRH THERMOSTAT R C G O Y1 Y2 W1 W2 H C HEATER PACKAGE WIRE HARNESS PLUG CONNECTED TO MAIN CONTROL BOX NOTE: L1 AND L2 PROVIDE POWER TO...
- Page 36 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION CONDENSATE OVERFLOW FAULT BROWN OUT FAULT EVAPORATOR FREEZE CONDITION TO ECM MOTOR REFRIGERANT LEAKAGE ADJUST NORM TEST HGRH THERMOSTAT R C G O Y1 Y2 W1 W2 H C 8733841690 Fig.
- Page 37 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT TO ECM MOTOR CONDENSER FREEZE CONDITION ADJUST CONDENSATE OVERFLOW FAULT NORM BROWN OUT FAULT TEST EVAPORATOR FREEZE CONDITION HGRH REFRIGERANT LEAKAGE THERMOSTAT R C G O Y1 Y2 W1 W2 H C 8733841691 Fig.
- Page 38 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION WHITE -W1 CONDENSATE OVERFLOW FAULT BROWN OUT FAULT TO ECM MOTOR EVAPORATOR FREEZE CONDITION GREY -W2 REFRIGERANT LEAKAGE ADJUST BLUE -C NORM TEST HGRH THERMOSTAT R C G O Y1 Y2 W1 W2 H C HEATER PACKAGE WIRE HARNESS PLUG CONNECTED TO MAIN CONTROL BOX...
- Page 39 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION CONDENSATE OVERFLOW FAULT TO ECM MOTOR WHITE -W1 BROWN OUT FAULT ADJUST EVAPORATOR FREEZE CONDITION NORM REFRIGERANT LEAKAGE GREY -W2 TEST HGRH BLUE -C THERMOSTAT R C G O Y1 Y2 W1 W2 H C HEATER PACKAGE WIRE HARNESS PLUG CONNECTED TO MAIN CONTROL BOX...
- Page 40 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION CONDENSATE OVERFLOW FAULT BROWN OUT FAULT EVAPORATOR FREEZE CONDITION TO ECM MOTOR REFRIGERANT LEAKAGE ADJUST NORM TEST HGRH THERMOSTAT R C G O Y1 Y2 W1 W2 H C 8733841694 Fig.
- Page 41 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION TO ECM MOTOR CONDENSATE OVERFLOW FAULT BROWN OUT FAULT ADJUST NORM EVAPORATOR FREEZE CONDITION REFRIGERANT LEAKAGE TEST HGRH THERMOSTAT R C G O Y1 Y2 W1 W2 H C 8733841695 Fig.
- Page 42 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION WHITE -W1 CONDENSATE OVERFLOW FAULT BROWN OUT FAULT TO ECM MOTOR GREY -W2 EVAPORATOR FREEZE CONDITION REFRIGERANT LEAKAGE ADJUST BLUE -C NORM TEST HGRH THERMOSTAT R C G O Y1 Y2 W1 W2 H C HEATER PACKAGE WIRE HARNESS PLUG CONNECTED TO MAIN CONTROL BOX...
- Page 43 UPM STATUS LED - BLINK CODES HIGH PRESSURE FAULT LOW PRESSURE FAULT CONDENSER FREEZE CONDITION WHITE -W1 CONDENSATE OVERFLOW FAULT TO ECM MOTOR BROWN OUT FAULT GREY -W2 ADJUST EVAPORATOR FREEZE CONDITION NORM REFRIGERANT LEAKAGE BLUE -C TEST HGRH THERMOSTAT R C G O Y1 Y2 W1 W2 H C HEATER PACKAGE WIRE HARNESS PLUG CONNECTED TO MAIN CONTROL BOX...
- Page 44 Contact) [ ] VFD - VFD ENABLE/DISABLE WHITE S1-Rx Rnet + EQUIPMENT TOUCH S2-Tx BLACK Carrier TruVu DEVICE Rnet - S2-Rx STANDARD FACTORY INSTALLED COMPONENTS (INPUTS): Prog IN-2 - UNIVERSAL INPUT 2: Comm i-Vu Ready [ ] LWTS - LEAVING WATER TEMPERATURE SENSOR...
- Page 45 Speed Tap 3: Full Load PRE-START-UP Speed Tap 4: Extra speed tap. Not connected from factory. System Checkout See Tables 15-16 for blower performance by speed setting, and for After completing the installation, and before energizing the unit, the factory default motor setting.If a motor speed change is re- the following system checks should be made prior to initial quired, follow the instructions below: startup:...
- Page 46 Table 15 — 50WD Vertical Units — Constant Torque Motor Performance a,b,c DEFAULT AIRFLOW (cfm) AT EXTERNAL STATIC PRESSURE (in. wg) UNIT FACTORY TAP NO. SIZE MOTOR 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 SETTING —...
- Page 47 Table 17 — 50WD Vertical Units — Constant Airflow Motor Performance a,b,c DEFAULT AIRFLOW (cfm) AT EXTERNAL STATIC PRESSURE (in. wg) FACTORY UNIT SIZE FAN SPEED MOTOR 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 SETTING —...
- Page 48 Table 18 — 50WD Horizontal Units — Constant Airflow Motor Performance a,b,c DEFAULT AIRFLOW (cfm) AT EXTERNAL STATIC PRESSURE (in. wg) FACTORY MODEL FAN SPEED MOTOR 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 SETTING — —...
- Page 49 This fluctuation is normal and should be considered when System Flushing and Filling charging the system initially. Run the unit in either heating or Once the piping is complete, units require final purging and loop cooling for several minutes to condition the loop to a charging.
- Page 50 Water Pressure Drop Curve for Units without 2-Way Valve 12.0 10.0 10.0 16.0 20.0 12.0 18.0 22.0 14.0 Flow Rate (gpm) 007-015 024-036 048-070 Fig. 43 — Water Pressure Drop Curve for Units without 2-Way Valve Water Pressure Drop Curve for Units with 2-Way Valve 14.0 12.0 10.0...
- Page 51 ANTIFREEZE NOTE: These operating limits are not normal or continuous operating conditions. Assume that such a start-up is for the In areas where leaving water temperatures drop below 40°F or purpose of bringing the building space up to occupancy where piping will be routed through areas subject to freezing, anti- temperature.
- Page 52 Use the thermostat or DDC control to enable the compressor Verify that the compressor is on and that the water flow rate is by placing the unit in cooling mode. correct by measuring pressure drop through the heat exchanger using P/T plugs. Check the elevation and Verify compressor operation.
- Page 53 Table 22 — 50WD007 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTER FLUID WATER Suction Discharge Water Temp Air Temp Suction Discharge Water Temp Air Temp TEMP FLOW Pressure Pressure Rise Drop Pressure Pressure Drop Rise (°F) (gpm/ton) (psig) (psig) (°F)( (°F)
- Page 54 Table 24 — 50WD012 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTER FLUID WATER Suction Discharge Water Air Temp Suction Discharge Water Temp Air Temp TEMP FLOW Pressure Pressure Temp Rise Drop Pressure Pressure Rise Drop (°F) (gpm/ton) (psig) (psig) (°F) (°F)
- Page 55 Table 26 — 50WD018 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTER FLUID WATER Suction Discharge Water Temp Air Temp Suction Discharge Water Temp Air Temp TEMP FLOW Pressure Pressure Rise Drop Pressure Pressure Rise Drop (°F) (gpm/ton) (psig) (psig) (°F) (°F)
- Page 56 Table 28 — 50WD030 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTER FLUID WATER Suction Discharge Water Temp Air Temp Suction Discharge Water Temp Air Temp TEMP FLOW Pressure Pressure Rise Drop Pressure Pressure Rise Drop (°F) (gpm/Ton) (psig) (psig) (°F) (°F)
- Page 57 Table 30 — 50WD042 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTER FLUID Suction Discharge Water Temp Air Temp Suction Discharge Water Temp Air Temp TEMP Water Flow Pressure Pressure Rise Drop Pressure Pressure Rise Drop (°F) (gpm/ton) (psig) (psig) (°F) (°F)
- Page 58 Table 32 — 50WD060 Typical Unit Operating Pressures and Temperatures COOLING HEATING ENTER FLUID WATER Suction Discharge Water Temp Air Temp Suction Discharge Water Temp Air Temp TEMP FLOW Pressure Pressure Rise Drop Pressure Pressure Rise Drop (°F) (gpm/ton) (psig) (psig) (°F) (°F)
- Page 59 W is energized, it will enable Electric heater and disable compressor (Y). Unit Protection Module (UPM) All Carrier WSHP units feature an advanced UPM which imple- TWO-POSITION MOTORIZED ISOLATION VALVE ments all the critical equipment safeties and allows for continuous (2-WAY SOLENOID VALVE) (OPTIONAL) safe and reliable operation.
- Page 60 Fig. 45 — UPM Sequence of Operations...
- Page 61 Fig. 46 — ECM Control Board Dehumidification Options Sequence of Operation...
- Page 62 and intelligent alarming, which will differ from the units with Sequence of Operation for Units with TruVu UPM board only. Below is an overview of the different fea- DDC Controller tures for the TruVu™ controls. See Fig. 47 for TruVu™ Con- Units with TruVu™...
- Page 63 SCHEDULING • Continuous (default) - intermittent operation during unoc- cupied periods and continuous during occupied periods Time periods can be configured to schedule the transitions from • Always on - operates the fan continuously during both oc- occupied to unoccupied operation. The time periods control the cupied and unoccupied periods space temperature to occupied heating and cooling setpoints.
- Page 64 COOLING OPERATION NOTE: During cooling mode, the unit cools and dehumidifies, and disables the reheat coil. However, once the call for cooling has Space Temperature Control been satisfied and there is still a call for dehumidification, the unit The TruVu operates 1 or 2 stages of compression to maintain the continues to operate in the reheat mode.
- Page 65 failure occurs. Unless a compressor fault condition exists, the 2-position Waterside Economizer Control valve only opens to supplement the heat provided by the compres- 2-Position Waterside Economizer Control has the capability to sor, if the space temperature falls more than 1°F below the desired control a NO or NC, 2-position water valve to control source wa- heating setpoint.
- Page 66 COMPRESSOR STATUS disabled. The unit will automatically restart after this time period. If the fault occurs 2 times (configurable on UPM) within 60 min- The TruVu provides a status input to monitor the compressor oper- utes the UPM will put the unit into hard lockout requiring manual ation.
- Page 67 Supply Air Temperature Alarm Airside Linkage Failure Alarm (if Airside Linkage was active) The control has 2 configurable alarm limits for supply air tempera- ture. The control verifies that the supply air temperature is within The control generates an Airside Linkage failure alarm if Linkage operating range (between high and low limits) when the compres- fails after once being active.
- Page 68 temperature rises above or falls below the appropriate limits, and flammable hazards or ignition risks. “No Smoking” signs shall be lasts for more than 15 seconds, an alarm is generated and the com- displayed. pressor shuts down. VENTILATED AREA Return Air Temperature Alarm (if RAT sensor is field Ensure that the area is in the open or that it is adequately ventilated provided) before breaking into the system or conducting any hot work.
- Page 69 Refer to the Carrier System Design Manual, Part 5, DETECTION OF FLAMMABLE REFRIGERANTS for general water conditioning information.
- Page 70 When condenser is full, allow solution to remain overnight, then • Continuously flush or purge with inert gas when using drain condenser and flush with clean water. Follow acid flame to open circuit; and open the circuit. manufacturer’s instructions (see Fig. 48). The refrigerant charge shall be recovered into the correct recovery cylinders if venting is not allowed by local and national codes.
- Page 71 The recovery equipment shall be in good working order with a set Remove the upper front panel. of instructions concerning the equipment that is at hand and shall Open the front lower access panel with the control box. be suitable for the recovery of the flammable refrigerant. If in Disconnect electrical power and lift off the access panel to doubt, the manufacturer should be consulted.
- Page 72 when installation constraints prevent the use of the slide-out fea- Blower Assembly Service and Removal ture, follow these steps: Disconnect the motor power wires from the motor terminals CAUTION before removing the motor from the unit. Shut off the main power supply to the unit and apply lock- Before attempting to remove fan motors or motor mounts, out/tag-out procedures.
- Page 73 Remove the three screws located on the motor side of the Horizontal Configuration Units blower assembly. See Fig. 52. For horizontal configurations, if removal of the blower assembly becomes necessary, follow these steps: Twist and pull blower back from welded pins located on opposite side to the motor, near the evaporator.
- Page 74 UNIT PROTECTION MODULE (UPM) Causes of TXV Failure All Carrier WSHPS are equipped with a 24V low voltage control The most common causes of TXV failure are: circuit. Units are selectable to be provided with no controls for...
- Page 75 Diagnostics Digital thermometer, preferably insulated, with wire leads that can be connected directly to the tubing. Several tests may be required to determine if a TXV has failed. The following tools may be required for testing: Refrigerant pressure-temperature chart for the refrigerant Refrigerant gauge manifold compatible with the refrigerant in used.
- Page 76 To determine that a TXV has failed, verify the following: CAUTION • The suction pressure is low and the valve is non- responsive. Always recover the refrigerant from the system with suitable • The TXV sensing bulb can be removed from the suction approved tools, recovery equipment, and practices prior to at- line and warmed by holding the bulb in your hand.
- Page 77 Table 34 — Compressor Characteristics COLD WINDING RESISTANCE VALUES (+/- 7%) MODEL VOLTAGE CODE Single Phase Three Phase CAPACITOR (μF/V) T1-T2 T2-T3 T3-T1 208-230/1/60 4.82 4.51 — — — 20µF/370-v 50WD007 265/1/60 7.84 5.59 — — — 15µF/370-v 208-230/1/60 4.01 4.75 —...
- Page 78 Table 35 — Troubleshooting FAULT COOLING HEATING CHECK POSSIBLE CAUSE SOLUTION High Pressure Fault - No or Check water valves and/or pumps for proper operation. Check Low Water Flow 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 low...
- Page 79 Table 35 — Troubleshooting (cont) FAULT COOLING HEATING CHECK POSSIBLE CAUSE SOLUTION Check supply voltage from the fan relay to the motor. Check that all motor wires are secure. With power off spin the motor Fan Relay Energized Faulty Motor shaft - noise, resistance or uneven motion can be signs of motor failure.
- Page 82 © 2024 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500449-01 Printed in U.S.A. Form No. 50WD-1SI Pg 82 12-24 Replaces: NEW...
- Page 83 50WD 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 preceding sections of this Installation, Start-Up, and Service Instructions document.
- Page 84 SUBCOOLING = DISCHARGE SATURATION TEMPERATURE – LIQUID LINE TEMPERATURE (DEG F) *Use 500 for water, 485 for antifreeze. © 2024 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500449-01 Printed in U.S.A.
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