Carrier PSD006-070, PSV, 50PSH instruction manual Service

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SERVICE

Perform the procedures outlined below periodically, as indicated.

WARNING

To prevent injury or death due to electrical shock or contact with moving parts, open unit disconnect switch before ser- vicing unit.

IMPORTANT: When a compressor is removed from this unit, system refrigerant circuit oil will remain in the com- pressor. To avoid leakage of compressor oil, the refrigerant lines of the compressor must be sealed after it is removed.

IMPORTANT: All refrigerant discharged from this unit must be recovered without exception. Technicians must fol- low industry accepted guidelines and all local, state and fed- eral statutes for the recovery and disposal of refrigerants.

IMPORTANT: To avoid the release of refrigerant into the atmosphere, the refrigerant circuit of this unit must only be serviced by technicians who meet local, state and federal proficiency requirements.

Filters — Filters must be clean for maximum performance. Inspect filters every month under normal operating conditions. Replace when necessary.

IMPORTANT: Units should never be operated without a filter.

Water Coil — Keep all air out of the water coil. Check open loop systems to be sure the well head is not allowing air to infiltrate the water line. Always keep lines airtight.

Inspect heat exchangers regularly, and clean more frequent- ly if the unit is located in a “dirty” environment. Keep the heat exchanger full of water at all times. Open loop systems should have an inverted P trap placed in the discharge line to keep water in the heat exchanger during off cycles. Closed loop systems must have a minimum of 15 psig during the summer and 40 psig during the winter.

Check P trap frequently for proper operation.

CAUTION

To avoid fouled machinery and extensive unit clean-up, DO NOT operate units without filters in place. DO NOT use equipment as a temporary heat source during construction.

Condensate Drain Pans — Check condensate drain pans for algae growth twice a year. If algae growth is apparent, consult a water treatment specialist for proper chemical treat- ment. Applying an algaecide every three months will typically eliminate algae problems in most locations.

Refrigerant System — Verify air and water flow rates are at proper levels before servicing. To maintain sealed circuit- ry integrity, do not install service gages unless unit operation appears abnormal.

Check to see that unit is within the superheat and subcool- ing temperature ranges shown in Tables 20-30. If the unit is not within these ranges, recover and reweigh in refrigerant charge.

Compressor — Conduct annual amperage checks to en- sure that amp draw is no more than 10% greater than indicated on the serial plate data.

Fan Motors — All units have lubricated fan motors. Fan motors should never be lubricated unless obvious, dry opera- tion is suspected. Periodic maintenance oiling is NOT recom- mended as it will result in dirt accumulating in the excess oil and cause eventual motor failure. Conduct annual dry opera- tion check and amperage check to ensure amp draw is no more than 10% greater than indicated on serial plate data.

Condensate Drain Cleaning — Clean the drain line and unit drain pan at the start of each cooling season. Check flow by pouring water into drain. Be sure trap is filled to main- tain an air seal.

Air Coil Cleaning — Remove dirt and debris from evap- orator coil as required by condition of the coil. Clean coil with a stiff brush, vacuum cleaner, or compressed air. Use a fin comb of the correct tooth spacing when straightening mashed or bent coil fins.

Condenser Cleaning — Water-cooled condensers may require cleaning of scale (water deposits) due to improperly maintained closed-loop water systems. Sludge build-up may need to be cleaned in an open water tower system due to induced contaminants.

Local water conditions may cause excessive fouling or pitting of tubes. Condenser tubes should therefore be cleaned at least once a year, or more often if the water is contaminated.

Proper water treatment can minimize tube fouling and pitting. If such conditions are anticipated, water treatment analysis is recommended. Refer to the Carrier System Design Manual, Part 5, for general water conditioning information.

CAUTION

Follow all safety codes. Wear safety glasses and rubber gloves when using inhibited hydrochloric acid solution. Observe and follow acid manufacturer’s instructions.

Clean condensers with an inhibited hydrochloric acid solu- tion. The acid can stain hands and clothing, damage concrete, and, without inhibitor, damage steel. Cover surroundings to guard against splashing. Vapors from vent pipe are not harmful, but take care to prevent liquid from being carried over by the gases.

Warm solution acts faster, but cold solution is just as effec- tive if applied for a longer period.

GRAVITY FLOW METHOD — Do not add solution faster than vent can exhaust the generated gases.

When condenser is full, allow solution to remain overnight, then drain condenser and flush with clean water. Follow acid manufacturer’s instructions. See Fig. 36.

FORCED CIRCULATION METHOD — Fully open vent pipe when filling condenser. The vent may be closed when condenser is full and pump is operating. See Fig. 37.

Regulate flow to condenser with a supply line valve. If pump is a non overloading type, the valve may be fully closed while pump is running.

For average scale deposit, allow solution to remain in con- denser overnight. For heavy scale deposit, allow 24 hours. Drain condenser and flush with clean water. Follow acid manu- facturer’s instructions.

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Contents Installation, Start-Up, Service Instructions ContentsSafety Considerations InstallationGeneral Physical Data 50PSH, PSV, PSD018-070 Units Typical Installation 50PSH Unit ASP BSPCAP Code Return Discharge CSP50PSV Dimensional Data A50-7846ef HWR Hot Water Reheat Left Hand Right HandSide Discharge Back DischargeInstall Condensate Drain Mount the UnitTrap Condensate Drain Connection Water Quality Guidelines Open Loop and Recirculating WellMaterial Typical Ground-Water Piping Installation Metal Hose Minimum Bend RadiiWire Field Power Supply Supply/Return Hose KitComplete C Controller Fault Codes Description of Operation LED Alarm RelayTrans AstatWire Number BMCCompr Yellow REDECM LWTA50-8363 Units with ECM, Complete C and LON Controller 460A50-8364 Units with ECM, Deluxe D and LON Controller 460SAT HpwsMves WHSP-OPEN A50 83548356 LWT A50-8380 Wshp Open Control50PSH, PSV, PSD Electrical Data PSC Motor 50PSH, PSV, PSD Electrical Data PSC High-Static Motor50PSH, PSV, PSD Electrical Data, ECM Motor Wire Field Controls Low Voltage Field WiringRnet Wiring Specifications A50-8441A50-8442 Field-Supplied Sensors for Wshp Open ControllerRnet Wiring Wire TerminalOperate ECM Interface Board A50-8443Setting Size ECM Blower Motor Performance DataRated MIN FAN Unit Airflow CFM Speed SizeCoil Units with Reheat ESP Loss Face Velocity FPMComplete C Control Jumper Settings Deluxe D Control Jumper SettingsPRE-START-UP Field Selectable InputsDIP Switch Block S2 Accessory 1 Relay Options DIP Switch Block S2 Accessory 2 Relay OptionsHumidistat/Dehumidistat Logic Deluxe D DIP Switch Settings VACHWR Operating Modes A50-8145Unit Start-Up Cooling Mode START-UPOperating Limits Operating Limits 50PSH, PSV, PSD UnitsUnit Start-Up Heating Mode Water Temperature Change Through Heat ExchangerCooling Heating Water Flow Rate GPM Rise F Drop F Water Flow TempGPM/ton Pressure Heat Cooling Rise Drop Psig Flow Flow Unit Start-Up with Wshp Open Controls BACview6 Display Interface50PSH, PSV, PSD Water Water Temperature F Flow 50PSH, PSV, PSD Coaxial Water Pressure DropUnit Size GPMApproximate Fluid Volume gal Per 100 Ft of Pipe Antifreeze Percentages by VolumeOperation Units with Aquazone Complete C ControlUnits with HWR Option Units with Wshp Open Multiple ProtocolPage Page LED Status Description of Operation Alarm Relay Complete C and Deluxe D Board System TestOff Complete C Control LED Code Fault Descriptions LED Code Fault DescriptionAquazone Deluxe D Control LED Indica Description Status LED Test LEDService Troubleshooting Refrigerant ChargingAir Coil Fan Motor Removal Replacing the Wshp Open Controller’s BatFP1 and FP2 Thermistor Location Page ECM Troubleshooting Fault Description SolutionECM Pin Connectors A50-8448ECM Troubleshooting Flow Diagram A50-8447Wshp Troubleshooting Fault Heating Cooling Possible Cause SolutionGood Practices TXVCondensate Fault Code 7 Auto ResettingNo Fault Code Shown CodeTemperature in Heating High Head PressureLow Suction Pressure Low Discharge AirAppendix a Wshp Open Screen Configuration Appendix a Wshp Open Screen Configuration Set Points Weekly ScheduleException Schedules 1Appendix a Wshp Screen Open Configuration ServiceTest Configuration Service Point Name Password Editable Range Default LevelScreen Name Alarm LinkagePage Page Copyright 2009 Carrier Corporation 50PSH,PSV,PSD START-UP Checklist II. START-UPHeating Cycle Analysis Cooling Cycle AnalysisA50-8494 A50-8495