506843-01
Page 22 of 39
Issue 1132
Leak Check
After gas piping is completed, carefully check all piping
connections (factory and field installed) for gas leaks. Use
a leak detecting solution or other preferred means.
NOTE:
If emergency shutoff is necessary, shut off the main
manual gas valve and disconnect the main power to the
furnace. The installer should properly label these devices.
Some soaps used for leak detection are corrosive to
certain metals. Carefully rinse piping thoroughly after
leak test has been completed. Do not use matches,
candles, flame or other sources of ignition to check for
gas leaks.
CAUTION
The furnace must be isolated by closing its individual manual
shut-off valve and disconnecting from from the gas supply
system the during any pressure testing
of
the gas supply
system at pressures
less than or equal to
1/2
psig (3.48
kPa,
14
inches w.c.).
Electrical
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
When testing pressure of gas lines, gas valve must be
disconnected and isolated. See Figure 19. Gas valves
can be damaged if subjected to pressures greater than
1/2
psig (3.48 kPa, 14 inches w.c.).
IMPORTANT
Electrostatic discharge can affect electronic
components. Take precautions during furnace
installation and service to protect the furnace’s electronic
controls. Precautions will help to avoid control exposure
to electrostatic discharge by putting the furnace, the
control and the technician at the same electrostatic
potential. Neutralize electrostatic charge by touching
hand and all tools on an unpainted unit surface, such
as the gas valve or blower deck, before performing any
service procedure.
CAUTION
The unit is equipped with a field make-up box on the left hand
side of the cabinet. The make-up box may be moved to the
right side of the furnace to facilitate installation. If the make-
up box is moved to the right side, clip the wire ties that bundle
the wires together. The excess wire must be pulled into the
blower compartment. Secure the excess wire to the existing
harness to protect it from damage.
Figure 19
NOTE:
BLACK IRON PIPE
ONLY
TO BE ROUTED INSIDE OF CABINET
Figure 18