HP H4H3 manual Installation Instructions Service Valves, Brazing Connections Fire Hazard

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INSTALLATION INSTRUCTIONS

F. SERVICE VALVES

Service valves are closed and plugged from the factory. Outdoor units are shipped with a refrigerant charge sealed in the unit. Leave the service valves closed until all other refrigerant system work is complete or the charge will be lost. Leave the plugs in place until line set tubing is ready to be inserted.

Heat pumps require a piston metering device in the liquid service valve for proper heating operation. Piston is shipped in the piston body of the liquid service valve, temporarily held in place with a plastic cap. Do not remove the plastic cap until line set tubing is ready to be installed.

Refer to Figure 6 and follow these steps for piston installation:

1.Remove plastic cap holding piston in piston body of liquid service valve.

2.Check that piston size (stamped on side of piston) matches with number listed on unit rating plate. Return piston to piston body of liquid service valve (either direction).

3.Find plastic bag taped to unit containing copper adapter tube, brass nut, and plastic washer.

4.Install plastic washer in the seat inside piston body.

5.Fit brass nut onto adapter tube and install tube onto liquid service valve. Tighten nut finger tight, then wrench additional ½ turn only. Over tightening may damage the plastic washer.

Service valve bodies are brass and suction tube stub is copper.

Figure 6

Liquid Service Valve with Piston

and Adapter Tube

 

 

BRASS NUT

 

ADAPTER TUBE

 

PLASTIC WASHER

PISTON

PISTON BODY

LIQUID SERVICE VALVE

G. BRAZING CONNECTIONS

! WARNING

FIRE HAZARD

Failure to follow this warning could result in per‐ sonal injury, death, and/or property damage.

Refrigerant and oil mixture could ignite and burn as it escapes and contacts brazing torch. Make sure the refrigerant charge is properly removed from both the high and low sides of the system be‐ fore brazing any component or lines.

3-phase R-410A Split System Heat Pump

Clean line set tube ends with emery cloth or steel brush. Remove any grit or debris.

Insert line set tube ends into service valve tube stubs.

Apply heat absorbing paste or heat sink product between service valve and joint. Wrap service valves with a heat sinking material such as a wet cloth.

Braze joints using a Sil-Fos or Phos-copper alloy.

!CAUTION

PRODUCT DAMAGE HAZARD

Failure to follow this caution may result in product damage.

Braze with Sil-Fos or Phos-copper alloy on cop‐ per-to-copper joints and wrap a wet cloth around rear of fitting to prevent damage to TXV.

H. EVACUATING LINE SET AND INDOOR COIL

The unit is shipped with a factory refrigerant charge. The liquid line and suction line service valves have been closed after final testing at the factory. Do not disturb these valves until the line set and indoor coil have been evacuated and leak checked, or the charge in the unit may be lost.

NOTE: Do not use any portion of the factory charge for purging or leak testing. The factory charge is for filling the system only after a complete evacuation and leak check has been performed.

!CAUTION

PRODUCT DAMAGE HAZARD

Failure to follow this caution may result in product damage.

Never use the outdoor unit compressor as a vacu‐ um pump. Doing so may damage the compressor.

Line set and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns. If deep vacuum equipment is not available, the alternate triple evacuation method may be used by following the specified procedure.

If vacuum must be interrupted during the evacuation procedure, always break vacuum with dry nitrogen.

Deep Vacuum Method

The deep vacuum method requires a vacuum pump capable of pulling a vacuum to 500 microns and a vacuum gauge capable of accurately measuring this vacuum level. The deep vacuum method is the most positive way of assuring a system is free of air and water.

Watch the vacuum gauge as the system is pulling down. The response of the gauge is an indicator of the condition of the system (refer to Figure 7).

With no leaks in the system, allow the vacuum pump to run for 30 minutes minimum at the deep vacuum level.

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Contents Table of Contents Installation InstructionsClearances Safety ConsiderationsInspect NEW Unit LocationClearances various examples Fastening Unit Down Ground Level InstallationRoof TOP Installation Unit SupportRefrigeration System Outdoor Unit Higher than Indoor Unit Installed at Indoor CoilRouting and Suspending Refrigerant Lines Liquid Line Filter-DrierBrazing Connections Fire Hazard Installation Instructions Service ValvesEvacuating Line SET and Indoor Coil Triple Evacuation Method Opening Service ValvesDeep Vacuum Gauge Response System ConditionsElectrical Wiring Typical Thermostat Control Circuit Connections Defrost Control Board Defrost SystemDefrost Thermostat Defrost ThermostatRefrigerant Charge START-UP ProcedureCooling Mode Heating ModeSequence of Operation Maintenance TroubleshootingRed Trip LED Comfort Alertt Diagnostics some modelsYellow Alert Missing Phase Yellow Alert Reverse PhaseAlert Flash Code 5 or 410A Quick Reference GuideTrip LED and Alert LED Alert Flash Code

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