035-15713-003 REV. A (0500)
Unitary Products Group
7
REFRIGERANT LINES (QUICK CONNECT UNITS)
IMPORTANT -
Do not remove protective caps from cou-
plings until pre-charged lines are routed and ready for final
connection. Protective caps prevent dirt from entering cou-
plings and contaminating system when connected together.
1.
Check size and length of pre-charged refrigerant lines
before installing.
a.
Check the size of the pre-charged refrigerant lines
to insure that they are correct for the model being
installed.
b.
Check the final routing of the tubing, and insure tub-
ing will be of adequate length, with allowance for
connection at the coil and outdoor unit.
The line set part number, size, and length are shown in the
tabular data sheet. Do not use any line sets other than those
shown.
2.
Copper tubing will work-harden.
a.
The pre-charged tubing should be handled carefully.
b.
Do not bend or work the tubing any more than nec-
essary. (The larger size tubing 3/4" for example, will
work-harden rapidly as it is formed. As the tubing
becomes harder, it is more susceptible to kinking
and damage).
3.
Forming Copper.
a.
No attempt should be made to bend the suction line
in a shorter radius than 12". See Figure 5.
4.
How to dispose of excess tubing.
a.
Tubing may be longer than required. Coil excess
tubing nearer the indoor coil rather than the outdoor
unit.
b.
Excess tubing must be coiled horizontally so the
flow of refrigerant is from top to bottom of the coil
and toward the outdoor unit. Another method is to
form a horizontal “U” large enough to take care of
excess. See Figure 7.
FIGURE 5 :
MINIMUM SUCTION LINE FORM
FIGURE 6 :
TYPICAL MANUFACTURED HOME APPLICATION
