Brazing Connections - Lennox TSA036H4N41 Installation Instructions Manual

IMPORTANT - REFRIGERANT LINES MUST NOT CONTACT WALL.
OUTSIDE WALL
WOOD BLOCK
BETWEEN STUDS
NOTE − SIMILAR INSTALLATION
PRACTICES SHOULD BE USED
IF LINE SET IS TO BE INSTALLED
ON EXTERIOR OF OUTSIDE
WALL.
OUTSIDE
WALL
PVC PIPE
Figure 12. Refrigerant Line Set: Installing
Vertical Runs (New Construction Shown)
ANCHORED HEAVY NYLON
WIRE TIE OR AUTOMOTIVE
MUFFLER-TYPE HANGER
WALL
STUD
METAL SLEEVE
Figure 13. Refrigerant Line Set: Transition
from Vertical to Horizontal

Brazing Connections

Use the following procedure to braze the line set to the new
outdoor unit. Figure 14 is provided as a general guide for
preparing to braze the line set to the outdoor unit.
LIQUID
LINE
SUCTION LINE
WIRE TIE
INSIDE WALL
STRAP
SLEEVE
WIRE TIE
WOOD BLOCK
WIRE TIE
STRAP
SLEEVE
SUCTION LINE WRAPPED WITH
ARMAFLEX
LIQUID LINE
IMPORTANT! REFRIGERANT
LINES MUST NOT CONTACT
STRUCTURE.
CAULK
FIBERGLASS INSULATION
AUTOMOTIVE
MUFFLER-TYPE HANGER
STRAP LIQUID LINE
TO SUCTION LINE
LIQUID LINE
SUCTION LINE − WRAPPED
IN ARMAFLEX
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.
Danger
refrigerant charge from only the high
side may result in the low side shell
and
pressurized. Application of a brazing
torch while pressurized may result in
ignition of the refrigerant and oil
mixture − check the high and low
pressures before unbrazing.
When using a high pressure gas such
as dry nitrogen to pressurize a
refrigeration
system, use a regulator that can
control the pressure down to 1 or 2
psig (6.9 to 13.8 kPa).
Brazing alloys and flux 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 flux.
1. Cut ends of the refrigerant lines square (free from
nicks or dents). Debur the ends. The pipe must remain
round, do not pinch end of the line.
2. Remove service cap and core from both the suction
and liquid line service ports.
3. Connect gauge low pressure side to liquid line service
valve.
4. To protect components during brazing, wrap a wet
cloth around both the liquid and suction line service
valve body and copper tube stub. Use another wet
cloth underneath the valve body to protect the base
paint.
Page 7
WARNING
WARNING
of fire. Bleeding
suction tubing
WARNING
or air conditioning
CAUTION
the
being
TSA*H4 SERIES