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2. Separate the distributor assembly and remove the
piston orifice and used teflon seal. Insert nozzle end of
the thermo expansion valve along with a new teflon seal
into the distributor and tighten to 20 – 30 ft. lbs. Use
backup wrench on all wrench flats. Overtightening will
crush the teflon seal and may cause a leak.
3. Attach liquid line portion of distributor assembly along
with new teflon seal to the inlet of the thermo expan-
sion valve. Tighten to 20 – 30 ft. lbs. Use backup
wrench on all wrench flats. Overtightening will
crush the teflon seal and may cause a leak.
4. Connect the external equalizer line to the equalizer
port on the suction line splice.
5. Strap the superheat sensing bulb to the suction header.
(Contains clean R22 to be used for flushing)
EXISTING SUCTION LINE
EXISTING
INDOOR COIL
L
V
I
A
Q
P
U
O
I
R
D
RECOVERY
CYLINDER
Page 6
Flushing Connections
INVERTED R22
CYLINDER
EXISTING LIQUID LINE
TANK RETURN
INLET
DISCHARGE
RECOVERY MACHINE
Flushing Existing Line Set and Indoor Coil
When flushing existing line set and/or indoor
coil, be sure to empty all existing traps. Re-
sidual mineral oil can act as an insulator,
preventing proper heat transfer. It can also
clog the thermal expansion valve, reducing
system performance and capacity. Failure to
properly flush the system as explained in
these instructions will void the warranty.
This procedure should not be performed on systems
which contain contaminants, such as compressor
burn out.
Required Equipment
The following equipment is needed to flush the existing
line set and indoor coil: Two clean R22 recovery bottles,
an oil-less recovery machine with a pump down feature,
OUTDOOR
UNIT
SUCTION LINE
SERVICE VALVE
LIQUID LINE
SERVICE VALVE
Note: The inverted R22 cylinder must contain
at least the same amount of refrigerant
as was recovered from the existing
system.
Figure 4
CAUTION
HIGH
LOW
PRESSURE
PRESSURE
GAUGE MANIFOLD
OPENED
CLOSED
# 504,465M
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