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E. LIQUID LINE FILTER-DRIER
NOTE:
lt is recommended that an appropriate filter—drier
be installed in the liquid line.
Leave the plugs in the tube ends until the filter—drier is
installed. The optimal location for the filter—drier is close
to the indoor coil. Install the filter-drier with the arrow
pointing towards the indoor coil. Refer to Figure 5.
Liquid Line Filter—-Drier
Filter-Drier
(arrow points towards indoor coil)
38-11-84
F. SERVICE VALVES
Service valves are closed and tube stubs are plugged
from the factory. Outdoor
units are shipped with a dry
nitrogen
holding charge
sealed
in the unit. Leave the
service valves closed until all other refrigerant system
work is complete or the charge will be lost. Leave the
plugs in place until line set tubing is ready to be inserted.
Service
valve
bodies
are
brass
and
tube
stubs
are
copper.
Service Valve
Figure 6
VALVE CORE
G. BRAZING
CONNECTIONS
NOTE:
Remove valve core from schrader port on both
Service Valves
BEFORE
brazing.
This helps prevent
overheating and damage to valve seals (refer to Figure 6).
Replace valve core when brazing is completed.
7
aN
Le
FIRE HAZARD
Failure to remove refrigerant and oil charge before
brazing could result in personal injury, death, and/
or property damage.
Refrigerant and oil mixture could ignite and burn
as it escapes
and
contacts
brazing torch.
Make
sure the refrigerant charge
is properly removed
from both the high and low sides of the system be-
fore brazing any component or lines.
Clean line set tube ends with emery cloth or steel brush.
Remove any grit or debris.
Insert line set tube ends into service valve tube stubs.
Apply heat absorbing paste or heat sink product between
service valve and joint. Wrap service valves with a heat
sinking material such as a wet cloth.
Braze joints using a Sil-Fos or Phos-copper alloy.
A
CAUTION
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product
damage.
Braze with Sil-Fos or Phos-copper alloy on cop-
per—-to-copper joints and wrap a wet cloth around
rear of fitting to prevent damage to TXV.
421 01 6400 00
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