J4AC3 Installation Manual

1. Install the lines with as few bends as possible. Care must be taken not to damage

the couplings or kink the tubing. Use clean hard drawn copper tubing where no

appreciable amount of bending around obstruction is necessary, if soft copper must

be used, care must be taken to avoid sharp bends which may cause a restriction.

2. The lines should be installed so that they will not obstruct service access to the coil,

air handling system or filter.

3.7 PRECAUTIONS DURING LINE INSTALLATION

3. Care must also be taken to isolate the refrigerant lines to minimize noise transmis-

sion from the equipment to the structure.

4. The suction line must be insulated. Tape and suspend the refrigerant lines as shown.

DO NOT allow tube metal-to-metal contact. See Fig.5.

5. Use PVC piping as a conduit for all underground installations as shown in Fig.6.

Buried lines should be kept as short as possible to minimize the build up of liquid

refrigerant in the suction line during long periods of shutdown.

6. Pack a sealing material such as perma gum around refrigerant lines where they

penetrate a wall to reduce vibration and to retain some flexibility.

Insulated Liquid Line

Tape

Sheet Metal Hanger

optional

Suggested

Incorrect

Fig.5 Tubing Hanger

Fig.6 Underground Installation

Insulated Suction Line