Carrier 25HCS Outdoor Unit Connected To Factory Approved Indoor Unit, Accessory Usage

Table 1 – Accessory Usage

	REQUIRED FOR LOW--- AMBIENT	REQUIRED FOR	REQUIRED FOR
Accessory	COOLING APPLICATIONS	LONG LINE APPLICATIONS*	SEA COAST APPLICATIONS
	(Below 55°F / 12.8°C)	(Over 80 ft. / 24.38 m)	(Within 2 miles / 3.22 km)
Accumulator	Standard	Standard	Standard
Ball Bearing Fan Motor	Yes{	No	No
Compressor Start Assist Capacitor and	Yes	Yes	No
Relay
Crankcase Heater	Yes	Yes	No
Evaporator Freeze Thermostat	Yes	No	No
Hard Shutoff TXV	Yes	Yes	Yes
Isolation Relay	Yes	No	No
Liquid Line Solenoid Valve	No	See Long--- Line Application Guideline	No
Motor Master→ Control or	Yes	No	No
Low Ambient Pressure Switch
Support Feet	Recommended	No	Recommended

*For tubing line sets between 80 and 200 ft. (24.38 and 60.96 m) and/or 20 ft. (6.09 m) vertical differential, refer to Residential Split---System Longline Application Guideline.

{Additional requirement for Low---Ambient Controller (full modulation feature) MotorMasterr Control.

Outdoor Unit Connected To Factory Approved Indoor Unit

Outdoor unit contains correct system refrigerant charge for operation with approved ARI rated indoor unit when connected by

15ft (4.57 m) of field-supplied or factory-accessory tubing, and factory supplied filter drier. Check refrigerant charge for maximum efficiency.

Refrigerant Tubing and Sweat Connections

Connect vapor tube to fitting on outdoor unit vapor service valves (see Table 2). Connect liquid tubing to adapter tube on liquid service valve. Use refrigerant grade tubing.

!CAUTION

UNIT DAMAGE HAZARD

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

Service valves must be wrapped in a heat-sinking material such as a wet cloth while brazing.

Remove plastic retainer holding outdoor piston in liquid service valve, leaving the piston and piston retainer inside the valve. Connect sweat/flare adapter provided, to valve. (See Fig. 4.) Connect refrigerant tubing to fittings on outdoor unit vapor and liquid service valves. Service valves are closed from factory and ready for brazing. After wrapping service valve with a wet cloth, tubing set can be brazed to service valve using either silver bearing or non-silver bearing brazing material. Do not use soft solder (materials which melt below 800°F/427°C). Consult local code requirements. Refrigerant tubing and indoor coil are now ready for leak testing. This check should include all field and factory joints.

PISTON BODY

PISTON

PISTON

RETAINER

SWEAT/FLARE ADAPTER

A05226

Fig. 4 - Liquid Service Valve

Table 2 – Refrigerant Connections and Recommended Liquid

and Vapor Tube Diameters (In.)

			RATED VAPOR
	LIQUID		up to 80 ft. (24.38 m)*
UNIT SIZE
	Connection	Tube	Connection	Tube
	Diameter	Diameter	Diameter	Diameter
018, 024	3/8	3/8	5/8	5/8
030, 036	3/8	3/8	3/4	3/4
042, 048	3/8	3/8	7/8	7/8
060	3/8	3/8	7/8	1-1/8

Notes:

1.Tube diameters are for total equivalent lengths up to 80 ft. (24.38 m)

2.Do not apply capillary tube or fixed orifice indoor coils to these units.

*For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 20 ft. (6.10 m) vertical differential (250 ft./ 76.2 m)Total Equivalent Length), refer to the Longline Guideline--- Air Conditioners and Heat Pumps using R--- 22 Refrigerant.

Install Liquid Line Filter Drier Indoor

Refer to Fig. 5 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 5 in. (127 mm) long liquid tube from step 1.

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

A05227

Fig. 5 - Liquid Line Filter Drier

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 triple evacuation procedure in service manual). Always break a vacuum with dry nitrogen.

25HCS

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