Instruction Manual

Page 2
Installation
WARNING
Polyol ester (POE) oils used with HFC-410A refrigerant
absorb moisture very quickly. It is very important that the
refrigerant system be kept closed as much as possible.
DO NOT remove line set caps or service valve stub caps
until you are ready to make connections.
WARNING
Danger of re. Bleeding the refrigerant
charge from only the high side may result
in pressurization of the low side shell and
suction tubing. Application of a brazing torch
to a pressurized system may result in ignition
of the refrigerant and oil mixture. Check the
high and low pressures before applying heat.
WARNING
Danger of explosion!
Can cause equipment damage, injury, or
death.
When using a high pressure gas such as dry
nitrogen to pressurize a refrigeration or air
conditioning system, use a regulator that can
control the pressure down to 1 or 2 psig (6.9
to 13.8 kPa).
CAUTION
Brazing alloys and ux contain materials which are
hazardous to your health.
Avoid breathing vapors or fumes from brazing operations.
Perform operations only in well ventilated areas.
Wear gloves and protective goggles or face shield to
protect against burns.
Wash hands with soap and water after handling brazing
alloys and ux.
1 - Loosen screw on clamp and remove sensing bulb
from vapor line as illustrated in gure 2.
2 - Cut liquid line and extension tube between TXV and
distributor as illustrated in gure 2.
3 - Debraze equalizer line from manifold of coil.
4 - Braze check valve assembly to coil as illustrated in
Figure 3. Wrap both ends of TXV with a wet rag
to protect the TXV internal components. Leave wet
rags on TXV until the brazed connections have had
time to cool down.
5 - Install new TXV sensing bulb in same location as
the one removed in step 1. Secure with existing
clamp and screw.
6 - Repeat above procedure for second stage.
7 - Flush, leak test and evacuate the system before
adding refrigerant.
LOOSEN SCREWS AND REMOVE
SENSING BULBS
CUT HERE
EQUILIZER
LINE
EQUILIZER
LINE
FIGURE 2. Remove TXVs