HP H2H3, N2H3 manual 5

INSTALLATION INSTRUCTIONS

!CAUTION

PRODUCT DAMAGE HAZARD

Failure to follow this caution may result in product damage.

Indoor coil and outdoor unit must be listed as a certified combination (match) in the ARI Unitary Directory of Certified Products.

Indoor coil must have R-22 specific, hard shut-off TXV refrigerant metering device.

When installing a hard shut-off TXV on an indoor coil, follow the instructions provided with the new TXV.

A typical hard shut-off TXV installation is shown in Figure 3.

Figure 3 Typical TXV Installation

INDOOR

COIL

EQUALIZER

TUBE

SENSING	SUCTION
	TUBE
BULB

LIQUID

TUBE

HARD

SHUT-OFF

TXV

SENSING BULB

(EITHER SIDE)	STRAP
	SUCTION
	TUBE
8 O'CLOCK	4 O'CLOCK

3-phase R-22 Split System Heat Pump

B. REFRIGERANT LINE SETS

The refrigerant line set must be properly sized to assure maximum efficiency and proper oil circulation. Select line set tube diameters as specified in Figure 4.

NOTE: If the line set actual length is to exceed 80 feet, or if there is more than 20 feet vertical separation between outdoor and indoor units, refer to the Long Line Application Guidline document for additional instructions.

NOTE: Line set actual length must not exceed 200 feet.

NOTE: A crankcase heater must be used when the refrigerant line length exceeds 80 feet.

If it is necessary to add refrigerant line in the field, use dehydrated or dry, sealed, deoxidized, copper refrigeration tubing. Do not use copper water pipe.

Do not remove rubber plugs or caps from copper tubing until connections are ready to be made.

Be extra careful when bending refrigeration tubing. Tubing can “kink” easily, and if this occurs, the entire length of tubing must be replaced.

!WARNING

PERSONAL INJURY HAZARD

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

Relieve pressure and recover all refrigerant before servicing existing equipment, and before final unit disposal. Use all service ports and open all flow-‐ control devices, including solenoid valves.

!CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in improp‐ er product operation.

Do not leave system open to atmosphere any lon‐ ger than absolutely required for installation. Inter‐ nal system components - especially refrigerant oils - are extremely susceptible to moisture con‐ tamination. Keep ends of tubing sealed during installation until the last possible moment.

Figure 4		R-22 Line Set Tube Diameter (Liquid Tube Always a"” dia.)
	Service Valve Fittings			Line Set < 80 feet long	Line Set 80 - 200 feet long
Model Size	Liquid		Suction	Suction Line Diameter	Suction Line Diameter
36 (3 ton)	a”		w”	w”	d”
42 (32 ton), 48 (4 ton)	a”		d”	d”	!8”
60 (5 ton)	a”		d”	!8”	!8”

NOTE: If the line set actual length is to exceed 80 feet, or if there is more than 20 feet vertical separation between outdoor and indoor units, refer to the Long Line Application Guideline document for additional instruc‐ tions.

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