Lennox G43UF SERIES User Manual

BEFORE LIGHTING the untt. smell all around the ap-
pliance area for gas. Be SUre to smell next to the noor be-
cause soma gas is heavier than air and will settle on the
noor.
The gas valve on the G43UF will be equipped with a gas
control sWitch. Use only your hand to move the switch, Nev-
er use tools. If the sWitch will not move by hand, do not try to
repair it. Call a licensed professional service technician (or
equivalent). Force or attempted repair may result in a fire or
explosion.
Placing the G43UF furnace into operation:
G43UF units are equipped with an ignition system. Do not
allempt to manually light burners On this furnace. Each
time the thermostat calls for heat, the burners will automati-
cally light. The ignitor does not get hot when there is no call
for heat on units With this ignition system.
Operating the Gas Valve (Figures 2 and 3)
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· White Rodgers 36G Gas Valve - Move gas valve
switch to OFF. See figure 2 for the White Rodgers 36G
valve.
Honeywell VR8205 GflS Valve - Move switch on gas
valve to OFF. See figure 3 for Honeywell VR8205
valve.
7 - Wait five minutes to clear out any gas. If you then smell
gas, STOPI 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.
S- White Rodgers 36G Gas Valve - Move gas valve
switch to ON. See figure 2 for the While Rodgers 36G
valve.
Honeywell VR8205 Gas Valve - Move SWitch on gas
valve to ON. See figure 3 for Honeywell VR8205 valve.
White Rodgers 36G Series Gas Valve
MANIFOLD
PRE88U~E
ADJUSTMENT
SCREW
INLET
t==i_~·PRESSURE
POST
OUTLET
PRESSURE
POST
--."....<kI=::::l:~
GAS VAlVf: SHOWN IN OFF POSITION
FIGURE 2
Honeywell
VR8205 Series Gas Valve
MANIFOLD MANIFOLD
PRESSURE PRES8UR~
ADJUSTMEN OUTLET
SCREW
GAS VALVE SHOWN IN ON POSITION
FIGURE J
9 - Replace the upper access panel.
. 10 - Turn on all electrical power to to the unit.
11 - Selthe thermostat to desired setting.
NOTE - When unit Is Initially started. steps 1 through 11
may need to be repeated to purge air from gas lina.
12- If the appliance will not operate, follow the section
"Turning Off Gas to the Unit" and call your licensed pro-
fessIonal service technician (or equivalent).
Turning Off Gas to the Unit
1 -
Set the thermostat to the lowest setting.
2 - Turn off all electrical power to the unit if service is to be
performed.
3· RemoVe the upper access panel.
4· White Rodgers 36G Gas Valve • Move gas valve
switch to OFF.
Honeywell VR8205 Gas Valve - Move 5witch on gas
valve OFF.
5 - Replace the upper aCcess panel.
Page 4
SdJ!AJaS l'e:l!u'e4:l
a
WJ!'el8

Lennox G43UF SERIES Specifications

General

Brand	Lennox
Model	G43UF SERIES
Category	Furnace
Language	English