Open the suction service valve first! If the liquid
service valve is opened first, oil from the compressor
may be drawn into the indoor coil TXV, restricting
refrigerant flow and affecting operation of the system.
After the refrigerant charge has bled into the system,
open the liquid service valve. The service valve cap is
the secondary seal for the valves and must be
properly tightened to prevent leaks. Make sure cap is
clean and apply refrigerant oil to threads and sealing
surface on inside of cap. Tighten cap finger-tight and
then tighten additional 1/6 of a turn (1 wrench fiat), or
to the following specification, to properly seat the
sealing surfaces.
1. 3/8" valve to 5 - 10 in-Ibs
2. 5/8" valve to 5 - 20 in-Ibs
3. 3/4" valve to 5 - 20 in-Ibs
4.7/8" valve to 5 - 20 in-Ibs
Do not introduce liquid refrigerant from the cylinder
into the
crankcase of the compressor as this may damage the
compressor.
CRITICAL
REFRIGERANT
CHARGE
A
DEQUATE
REFRIGERANT
CHARGE
FOR
THE
EVAPORATOR
COIL
AND
15
FEET
OF
LINESET
IS
SUPPLIED
WITH
THE
CONDENSING
UNIT
. I
F
LINESET
EXCEEDS
15
FEET
IN
LENGTH
,
REFRIGERANT
SHOULD
BE
ADDED
AT
0.6
OUNCES
PER
FOOT
OF
LIQUID
LINE
.
Copyright © 2019 DewAir Corporation
11
RHC18O-IM v2.11 Sep 4, 2019
