For Your Safety Read Before Lighting - Lennox G40UH Series Installation Instructions Manual

FOR YOUR SAFETY READ BEFORE LIGHTING
-&WARNING
-&WARNING
-&CAUTION
BEFORE LIGHTING smell all around the appliance area for
gas, Be sure to smell next to the floor because some gas is
heavier than air and will settle on the floor.
The gas valve on the G40UH(X) unit may be equipped with
either a gas control knob or gas control lever. Use only your
hand to push the lever or to turn the gas control knob. Never
use tools. If the knob will not turn or if the lever will not move
by hand, do not try to repair it. Call a qualified service tech-
nician, Force or attempted repair may result in a fire or ex-
plosion.
Placing the furnace into operation:
G40UH(X) units are equipped with an automatic hot sur-
face ignition system. Do not attempt to manually light
burners on these furnaces. Each time the thermostat calls
for heat, the burners will automatically light, The igniter
does not get hot when there is no call for heat on units with
this ignition system.
a,WARNING
Gas Valve Operation (Figures 27, 28 and 29)
1 - STOP! Read the safety information at the beginning of
this section,
2 - Set the thermostat to the lowest setting,
3 - Turn off all electrical power to the unit,
4 - This furnace is equipped with an ignition device which
automatically lights the burners, Do not try to light the
burners by hand,
5 - Remove the upper access panel,
6 - Honeywell VR8205 Gas Valve with QN/QFF Switch
- Move gas valve switch to OFF, See figure 27.
Honeywell VR8205 Gas Valve with Control Knob -
Turn knob on gas valve clockwise _ to OFF, Do not
force, See figure 28.
White Rodgers 36G Gas Valve - Move gas valve
switch to OFF. See figure 29,
7 - Wait five minutes to clear out any gas. If you then smell
gas, STOP! Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's instruc-
tions. If you do not smell gas go to next step.
Honeywell VR8205 Series Gas Valve
MANIFOLD (With On/Off Switch)
PRESSURE
MANIFOLD
SCREW PRESSURE
(under cap) OUTLET
GAS VALVE ON/OFF SWITCH SHOWN IN OFF POSITION
FIGURE 27
Honeywell VR8205 Series Gas Valve
with Gas Control Knob
MANIFOLD MANIFOLD
PRESSURE . _V _ PRESSURE
ADJUSTMENT"_&___4" I h "--_"1, OUTLET
SCREW _
GAS VALVE SHOWN IN OFF POSITION
FIGURE 28
White Rodgers 36G Series Gas Valve
PRESSURE
POST
MANIFOLD
PRESSURE
ADJUSTMENT
SCREW
(Undercover
SCOW)
GAS VALVE SHOWN IN OFF POSITION
FIGURE 29
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