Page 22
3 - Turn off all electrical power to furnace.
THERMOSTATS
FIGURE 24
4 - This furnace is equipped with an ignition device
which automatically lights the burner. Do
not
try to
light the burners by hand.
5 - Remove upper access panel.
6 -
Honeywell VR8205 Gas Valve -
Turn knob on gas valve
clockwise
to
OFF
. Do not force. See figure 25.
White Rodgers 36E Gas Valve -
Switch gas valve
lever to
OFF
. See figure 25.
ON
OFF
FIGURE 25
HONEYWELL VR8205
SERIES GAS VALVE
GAS VALVE SHOWN IN OFF POSITION
WHITE RODGERS
36E GAS VALVE
GAS VALVE
SHOWN
IN OFF
POSITION
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 -
Honeywell VR8205 Gas Valve -
Turn knob on gas
valve counterclockwise
to
ON
. Do not force.
White Rodgers 36E Gas Valve -
Switch gas valve lever
to
ON
.
9 - Replace upper 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 line.
12- If the furnace still will not operate, follow the instruc
tions 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 upper access panel.
4 -
Honeywell VR8205 Gas Valve -
Turn knob on gas
valve clockwise
to
OFF
. Do not force.
White Rodgers 36E Gas Valve -
Switch gas valve
lever to
OFF
.
5 - Replace upper access panel.
Gas Pressure Adjustment
Gas Flow
To check for proper gas flow to the combustion chamber,
determine the Btu (kW) input from the unit rating plate. Di
vide this input rating by the Btu (kW) per cubic foot (cubic
meter) of available gas. The result is the required number
of cubic feet (cubic meter) per hour. Determine the flow of
gas through the gas meter for two minutes and multiply by
30 to get the hourly flow of gas.
Gas Pressure
1 - Check gas line pressure while the unit is firing at
maximum rate. Ensure the unit maintains a minimum
of 4.5 inches w.c. (1.12 kPa) for natural gas or 11.0
inches w.c. (2.73 kPa) for LP/propane gas .
2 - After line pressure has been checked and adjusted,
check regulator pressure. Correct manifold pressure
for LP/propane gas is 10.0 inches w.c. A natural gas
to LP/propane gas changeover kit is required to con
vert the unit. Refer to the installation instructions sup
plied with changeover kit for conversion procedure.
Correct regulator pressure for natural gas at altitudes
below 4500 feet is 3.5 in. w.c. See figures 26 and 27
for gas pressure adjustment screw location.
INLET
PRESSURE
TAP
HONEYWELL GAS VALVE
REGULATOR ADJUSTMENT SCREW LOCATION
CAP SCREW
(Black)
PRESSURE REGULATOR
ADJUSTING SCREW
(White)
GAS INLET
FIGURE 26
