Leak Testing The System - Lennox Elite XC13 Installation Instructions Manual

SUCTION LINE
12
BULB
SUCTION LINE
12
BULB
NOTE − Never mount on bottom of line.
Figure 26. TXV Sensing Bulb Installation
7. Remove and discard either the flare seal cap or flare
nut with copper flare seal bonnet from the equalizer
line port on the suction line as illustrated in figure 27.
IMPORTANT
When removing the flare nut, ensure that the copper
flare seal bonnet is removed.
FLARE SEAL
CAP
Figure 27. Copper Flare Seal Bonnet Removal
8. Connect the equalizer line from the TXV to the
equalizer suction port on the suction line. Finger
tighten the flare nut plus 1/8 turn (7 ft−lbs) as illustrated
in figure 23.
See the XC13 Engineering Handbook for approved TXV
indoor/outdoor unit
information. Figure 22 illustrates the kit components and
quantities.
ON LINES SMALLER THAN
7/8", MOUNT SENSING BULB
AT EITHER THE 3 OR 9
O'CLOCK POSITION.
BULB
ON 7/8" AND LARGER LINES,
MOUNT SENSING BULB AT
EITHER THE 4 OR 8 O'CLOCK
POSITION. NEVER MOUNT
ON BOTTOM OF LINE.
BULB
FLARE NUT
COPPER
OR FLARE SEAL
BONNET
MALE BRASS EQUALIZER
LINE FITTING
SUCTION LINE
match−ups and application

Leak Testing the System

After the line set has been connected to both the indoor
and outdoor units, check the line set connections and
indoor unit for leaks. Use the following procedure to test for
leaks:
Leak detector must be capable of sensing HFC
refrigerant.
Refrigerant can be harmful if it is inhaled.
Refrigerant must
responsibly.
Failure to follow this warning may result in personal
injury or death.
Fire, Explosion and Personal Safety
Hazard.
Failure to follow this warning could
result in damage, personal injury or
death.
Never use oxygen to pressurize or
purge refrigeration lines. Oxygen,
when exposed to a spark or open
flame, can cause damage by fire and/
or an explosion, that could result in
personal injury or death.
1. Connect an HFC−410A manifold gauge set as
illustrated in figure 28.
2. Open the valve on the HFC−410A cylinder (suction
only).
3. Open the high pressure side of the manifold to allow
HFC−410A into the line set and indoor unit. Weigh in
a trace amount of HFC−410A. [A trace amount is a
maximum of two ounces (57 g) refrigerant or three
pounds (31 kPa) pressure].
4. Close the valve on the HFC−410A cylinder and the
valve on the high pressure side of the manifold gauge
set.
5. Disconnect the HFC−410A cylinder.
Page 15
IMPORTANT
WARNING
be used and
WARNING
recovered
XC13 SERIES