CAUTION:
DO NOT BURY MORE THAN 36 IN. OF
REFRIGERANT TUBING IN GROUND. If any section
of tubing is buried, there must be a 6-in. vertical rise to
the valve connections on the outdoor unit. If more than
the recommended length is buried, refrigerant may mi-
grate to cooler buried section during extended periods of
unit shutdown, causing refrigerant slugging and possible
compressor damage at start-up.
V.
MAKE PIPING CONNECTIONS
Outdoor units may be connected to indoor sections using accessory
tubing package or field-supplied refrigerant grade tubing of correct
size and condition. For tubing requirements beyond 50 ft, consult
Long-Line Application Guideline which is available at your local
distributor.
CAUTION:
In some cases noise in the living area has
been traced to gas pulsations from improper installation
of equipment.
A.
Installation Recommendations
1. Locate the unit away from windows.
2. Ensure that vapor and liquid tube diameters are appropriate
to the capacity of the unit. (See Table 1.)
3. Run refrigerant tubes as directly as possible by avoiding
unnecessary turns and bends.
4. Leave some slack between the structure and the unit to
absorb vibration.
5. When passing refrigerant tubes through the wall, seal the
opening with RTV or other pliable silicon-based caulk. (See
Fig. 3.)
6. Avoid direct lineset contact with water pipes, ductwork,
floor joists, wall studs, floors, and walls.
7. Do not suspend refrigerant tubing from joists and studs with
a rigid wire or strap which comes in direct contact with the
tubing. (See Fig. 3.)
8. Ensure that tubing insulation is pliable and completely
surrounds the vapor tube.
9. When necessary, use hangar straps which are 1 in. wide and
conform to the shape of the tubing insulation. (See Fig. 3.)
10. Isolate the hangar straps from the insulation by using metal
sleeves bent to conform to the shape of the insulation.
If refrigerant tubes or indoor coil is exposed to atmospheric
conditions for longer than 5 minutes, it must be evacuated to 500
microns to eliminate contamination and moisture in the system.
B.
Outdoor Units Connected to Factory-Approved In-
door Units
Outdoor unit contains correct system refrigerant charge for opera-
tion with indoor unit of the same size when connected by 15 ft of
field-supplied or factory accessory tubing. Check refrigerant
charge for maximum efficiency. (See Section IX—Checking
Charge.)
Fig. 2—Unit Reference Drawing
UNIT
SIZE
A/B
C
D
E
F
In.
In.
In.
In.
In.
018
22-1/2
3-11/16
18-1/8
14-3/8
5/8
024-036
30
6-1/2
23-1/2
20
3/4
042-060
30
6-1/2
23-1/2
20
7/8
A92468
AIR DISCHARGE
3
/
8
″
DIA
LIQUID LINE CONN
FIELD CONTROL
SUPPLY CONN
7
/
8
″
DIA HOLE
AIR
DISCHARGE
AIR
DISCHARGE
AIR IN
AIR IN
1. ALLOW 30
″
CLEARANCE TO SERVICE END OF
UNIT, 48
″
ABOVE UNIT, 6
″
ON ONE SIDE, 12
″
ON REMAINING SIDE, AND 24
″
BETWEEN
UNITS FOR PROPER AIRFLOW.
2. MINIMUM OUTDOOR OPERATING AMBIENT IN COOLING MODE IS
55° F (UNLESS LOW AMBIENT CONTROL IS USED) MAX. 115° F.
3. MAXIMUM OUTDOOR OPERATING AMBIENT IN HEATING MODE IS 66° F.
4. SERIES DESIGNATION IS THE 13TH POSITION OF THE UNIT
MODEL NUMBER.
5. CENTER OF GRAVITY
NOTES:
FIELD POWER
SUPPLY CONN
7
/
8
″
DIA HOLE WITH
1
1
/
8
″
DIA KNOCKOUT
AND 1
3
/
8
″
DIA KNOCKOUT
A
D
AIR IN
E
B
AIR
IN
C
F
DIA SUCTION LINE CONN
—2—
