Electrostatic Discharge (Esd) - Lennox G40UH Series Installation Instructions Manual

MANUAL
MAIN SHUT-OFF
VALVE
(With 1/8 in. NPT
Plugged Tap Shown)
GROUND
JOINT
UNION
Left Side Piping
(Standard)
AUTOMATIC
GAS VALVE
(with manual
shut-off valve /
DRIP LEG
FIELD
PROVIDED
AND INSTALLED
AUTOMATIC MANUAL
GAS VALVE
(with manual VALVE
shut-off valve) (With 1/8 in. NPT
Shown)
JOINT
UNION
DRIP LEG
Right Side Piping
(Alternate)
FIGURE 19
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,
NO TE - If emergency shutoff is necessarj4 shut off the main
manual gas valve and disconnect the main power to the
furnace, The installer should properly label these devices,
ACAUTION
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
ACAUTION
The furnace must be isolated from the gas supply system
by closing its individual manual shut-off valve 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.).
klMPORTANT
MANUAL MAIN
SHUT-OFF VALVE
WILLNOTHOLD
NORMALTEST
PRESSURE |
CAP
ISOLATE
GAS VALVE
\
FURNACE
FIGURE 20
The unit is equipped with a field make-up box. The make-
up box may be moved to the right side of the furnace to fa-
cilitate installation, If the make-up box is moved to the right
side, the excess wire must be pulled into the blower
compartment. Secure the excess wire to the existing harn-
ess to protect it from damage,
INTERIOR MAKE-UP BOX INSTALLATION
MAKE-UP
BOX
Right Side
FIGURE 21
Page 21