INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner
421 01 5100 01 7
E. LIQUID LINE FILTER−DRIER
Outdoor units are shipped with an appropriate filter−drier
for installation 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 fil-
ter−drier with the arrow pointing towards the indoor coil.
Refer to Figure 7.
Figure 7
Liquid Line Filter−Drier
Installed at Indoor Coil
38−11−84
Filter−Drier
(arrow points towards indoor coil)
F. SERVICE VALVES
Service valves are closed and tube stubs are plugged
from the factory. Outdoor units are shipped with a refriger-
ant 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 cop-
per.
G. BRAZING CONNECTIONS
!
WARNING
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.
!
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.
H. EVACUATING LINE SET AND INDOOR COIL
The unit is shipped with a factory refrigerant charge. The
liquid line and suction line service valves have been
closed after final testing at the factory. Do not disturb
these valves until the line set and indoor coil have been
evacuated and leak checked, or the charge in the unit
may be lost.
NOTE: Do not use any portion of the factory charge for
purging or leak testing. The factory charge is for filling the
system only after a complete evacuation and leak check
has been performed.
!
CAUTION
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product
damage.
Never use the outdoor unit compressor as a vacu-
um pump. Doing so may damage the compressor.
Line set and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. If
deep vacuum equipment is not available, the alternate tri-
ple evacuation method may be used by following the spe-
cified procedure.
If vacuum must be interrupted during the evacuation pro-
cedure, always break vacuum with dry nitrogen.
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