Carrier 25HPA6 instruction manual Make Electrical Connections

Page 5

Install Liquid-Line Filter Drier Indoor

Refer to Fig. 3 and install filter drier as follows:

1.Braze 5-in. (127 mm) liquid tube to the indoor coil.

2.Wrap filter drier with damp cloth.

3.Braze filter drier to above 5-in. (127 mm) liquid tube. Flow arrow must point towards indoor coil.

4.Connect and braze liquid refrigerant tube to the filter drier.

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Installation of filter drier in liquid line is required.

A05227

Fig. 3 - Liquid-Line Filter Drier

Refrigerant Tubing connection Outdoor

Connect vapor tube to fitting on outdoor unit vapor service valves (see Table 1).

Install Adapter Tube

1.Remove plastic retainer holding outdoor piston in liquid service valve.

2.Check outdoor piston size with matching number listed on unit rating plate.

3.Locate plastic bag taped to unit containing adapter tube.

4.Remove TeflonR washer from bag and install on open end of liquid service valve.

5.Remove adapter tube from bag and connect threaded nut to liquid service valve. Tighten nut finger tight and then with wrench tighten an additional 1/2 turn (15 ft-lb).

DO NOT OVERTIGHTEN!

Sweat Connections

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

SUse a brazing shield

SWrap service valves with wet cloth or heat sink material.

Use refrigerant grade tubing. Service valves are closed from factory and ready for brazing. After wrapping service valve with a wet cloth, braze sweat connections using industry accepted methods and materials. Consult local code requirements. Refrigerant tubing

and indoor coil are now ready for leak testing. This check should include all field and factory joints.

Evacuate Refrigerant Tubing and Indoor Coil

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Never use the system compressor as a vacuum pump.

Refrigerant tubes and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns. The alternate triple evacuation method may be used. See Service Manual for triple evacuation method. Always break a vacuum with dry nitrogen.

Deep Vacuum Method

The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gauge capable of accurately measuring this vacuum depth. The deep vacuum method is the most positive way of assuring a system is free of air and liquid water. (See Fig. 4)

5000

 

 

 

 

 

 

 

4500

 

 

 

 

 

 

 

4000

 

 

 

 

 

LEAK IN

3500

 

 

 

 

 

 

 

 

 

 

SYSTEM

3000

 

 

 

 

 

 

 

 

 

 

 

 

2500

 

 

 

 

 

 

 

MICRONS2000

 

 

 

 

 

VACUUM TIGHT

1500

 

 

 

 

 

 

 

 

 

 

TOO WET

1000

 

 

 

 

 

 

 

 

 

 

TIGHT

500

 

 

 

 

 

 

 

 

 

 

DRY SYSTEM

 

 

 

 

 

 

0

1

2

3

4

5

6

7

 

 

 

MINUTES

 

 

 

 

 

 

 

 

 

 

A95424

Fig. 4 - Deep Vacuum Graph

Final Tubing Check

IMPORTANT: Check to be certain factory tubing on both indoor and outdoor unit has not shifted during shipment. Ensure tubes are not rubbing against each other or any sheet metal. Pay close attention to feeder tubes, making sure wire ties on feeder tubes are secure and tight.

Make Electrical Connections

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Do not supply power to unit with compressor terminal box cover removed.

Be sure field wiring complies with local and national fire, safety, and electrical codes, and voltage to system is within limits shown on unit rating plate. Contact local power company for correction of improper voltage. See unit rating plate for recommended circuit protection device.

25HPA6

5

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Contents Unit Operation and Safety Hazard Safety ConsiderationsIndoor Thermostat Control Options Electrical Shock HazardCheck Equipment and Job Site Install on a Solid, Level Mounting PadClearance Requirements Unpack UnitElevate Unit Operating AmbientMake Piping Connections Outdoor Unit Connected to Factory-Approved IndoorLiquid Rated Vapor Unit Size Accessory UsageMake Electrical Connections Airflow Selections ECM Furnaces Compressor Crankcase HeaterSystem Functions And Sequence Of Operation Install AccessoriesStart-Up Compressor Operation Time DelaysInfinity Controlled low ambient cooling Liquid-Line Solenoid AccessoryDefrost Defrost HoldCheck Charge Control Fault Pressure Switch Protection230V Line Power Disconnect Detection Unloader Test ProcedureThermistor Sensor Comparison Temperature ThermistorsFailed Thermistor Default Operation Status Codes TroubleshootingEdge Thermidistat Models TP-PRH-01 or TP-NRH-01 Puronr R-410A Refrigerant Quick Reference Guide Care and MaintenanceFinal Checks Catalog No 25HPA6---1SI