830867-BIM-B-0412
4
Johnson Controls Unitary Products
a. When the coil is above the outdoor unit, the suction line should be
sloped with a fall of a least 1/4" per feet toward the outdoor unit.
b. When the outdoor unit is above the coil, the tubing should be
sloped downward along lateral distance to the bottom, or from the
vertical riser.
6. Insulation of suction line.
a. Standard suction lines come pre-insulated from the factory with 3/
8" closed cell insulation, adequate for average installations.
b. Do not insulate liquid and suction lines together.
c. Liquid lines should not be insulated.
d. Liquid lines should not be in bare contact with suction line. See
Figure 4.
7. Install refrigerant lines to indoor coil first. The couplings without
Schrader valves are to be connected to the indoor coil. See Figure
5.
a. Form the tubing so it is properly aligned with the connections on
the coil.
b. Remove plugs and caps from connections.
c. Check that the rubber seals in connection ends are intact.
d. Be sure surfaces are clean.
e. Lubricate the rubber seals with clean refrigerant oil and make
connections.
f. Thread couplings together by hand to be sure they are not cross
threaded. Tighten coupling so diaphragms are touching (do not
puncture diaphragms at this time).
8. Install refrigerant line to outdoor unit. (The couplings with Schrader
valves are to be connected to the outdoor unit.
a. Form the tubing so it is properly aligned with the connections on
the outdoor unit. Insure the Schrader valves are accessible.
b. Remove plugs and caps from connections.
c. Check that the rubber seals in connection ends are intact.
d. Be sure surfaces are clean.
e. Lubricate the rubber seals with clean refrigerant oil and make
connections.
f. Thread couplings together by hand to be sure they are not cross
threaded. Tighten coupling so diaphragms are touching (do not
puncture diaphragms at this time).
9. Tightening couplings (For Flexi Fit & Copper only).
a. Tighten indoor coil couplings with wrenches; using wrench on sta-
tionary fitting of coupling and liquid line fitting at coil while nut is
being tightened. See Figure 6. Tighten the nut until the coupling
bottoms out.
b. Then tighten an additional 1/6 turn to complete the knife edge
seal.
c. Tighten outdoor unit couplings, with wrenches using a wrench on
the stationary fitting of the coupling while nut is being tightened.
Tighten the nut until the coupling bottoms out.
d. Then tighten an additional 1/6 turn to complete the knife edge
seal.
In regions of extreme temperatures and humidity, additional insula-
tion may be required to prevent excessive condensation and serious
loss of capacity.
FIGURE 4:
Installation of Vapor Line
FIGURE 5:
Quick Connect Refrigerant Line
Liquid refrigerant under pressure. Liquid refrigerant can cause severe
frostbite. To avoid possible loss of sight and/or frostbite use eye pro-
tection (safety glasses or safety face shield). Wearing leather gloves
will offer protection to hands.
NOTICE
Liquid
Line
Incorrect
Correct
Tape
Sheet Metal Hanger
Insulated Vapor Line
First Connection
To Indoor Coil
Second Connection
To Outdoor Coil
Insulation
FIGURE 6:
Ouick Connect Coupling
TIGHTEN
BACK UP
BACK UP
TIGHTEN
