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.7.
5. Use PVC piping as a conduit for all underground installations as shown in Fig.8.
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.7 Tubing Hanger
Fig.8 Underground Installation
10
Insulated Suction Line
Fig.9 Typical Installation
TO
INDOOR
BLOWER
TO
POWER
SUPPLY
TO
COIL
WEATHERPROOF
DISCONNECT
SWITCH
Seal opening(s) with
permagum or equivalent
24V control
signal
NOTE:All outdoor wiring must be weather proof
