Lennox International Inc. F8AUH - Manual (Page 4)

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6 - White Rodgers 36E Gas Valve - Switch gas valve lever
to OFF. do not force. See figure 2.
Honeywell VR8205 Gas Valve - Turn knob on gas valve
clockwise
to OFF. Do not force. See figure 3.
WHITE RODGERS 36E SERIES GAS VALVE
GAS VALVE SHOWN IN OFF POSITION
FIGURE 2
ON
OFF
HONEYWELL VR8205 SERIES GAS VALVE
GAS VALVE SHOWN IN OFF POSITION
FIGURE 3
7 - Wait five (5) 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
instructions. If you do not smell gas go to next step.
8 - White Rodgers 36E Gas Valve - Switch gas valve lever
to ON. Do not force.
Honeywell VR8205 Gas Valve - Turn knob on gas
valve counterclockwise
to ON. Do not force.
9 - Replace control access panel.
10 - Turn on all electrical power to unit.
11 - Set thermostat to desired setting.
NOTE – When unit is initially started, steps 1 through 11
may need to be repeated to purge air from gas line.
12 - If the appliance still will not operate, follow the
instructions To Turn Off Gas To Unit" and call your
service technician or gas supplier.
To Turn Off Gas To Unit
1 - Set thermostat to lowest setting.
2 - Turn off all electrical power to unit if service is to be
performed.
3 - Remove control access panel.
4 - Switch lever on White Rodgers gas valve to OFF; turn
knob on Honeywell valve clockwise to OFF. Do not
force.
5 - Replace control access panel.
Filters
All F8AUH filters must be installed external to the unit.
They can be ordered as an optional accessory item.
Filters should be inspected monthly. Clean or replace
the filters when necessary to ensure proper furnace
operation. See table 1 for filter sizes. Replacement filĆ
ters for F8AUH-045/060/075 units must have a miniĆ
mum velocity rating of 400 FPM. Replacement filters
for F8AUH-100/120 units require a minimum velocity
rating of 625 FPM. Figures 4 and 5 show possible filter
locations.
TABLE 1
Model Number Filter Size - inches (mm)
F8AUH-045/060/075 16 X 20 X 1 (406 X 508 X 25)
F8AUH-100/120 20 X 20 X 1 (508 X 508 X 25)
UPFLOW FURNACE
BOTTOM RETURN AIR
FIGURE 4