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4. Remove the door on the front of the furnace.
5. This furnace is equipped with an ignition device to
automatically light the burners. Do not try to light
burners by hand.
6. Turn the gas control knob clockwise
position (Figure 33). The knob should turn easily. Do
not use excessive force.
7. Wait five minutes to clear out any gas. Then smell for
gas, including near the floor.
8. If gas can be smelled following the five minute waiting
period in Step 7, follow the instructions on Page 2 of this
manual. If gas can not be smelled, turn the gas control
knob counterclockwise
ure 33). The knob should turn easily. Do not use
excessive force.
9. Replace the door on the front of the furnace.
10. Open the manual gas valve external to the furnace.
11. Turn on the electrical power supply to the furnace.
12. Set the room thermostat to the desired temperature.
NOTE: There is an approximate 30 second delay between
thermostat energizing and burner firing.
Inlet
ON
Inlet Pressure Tap
(Side of Valve)
Regulator Adjustment
Gas Valve
Control Knob
Figure 33
White Rodgers Model 36E96
GAS PRESSURES, ADJUSTMENTS, AND INPUT
Gas supply pressure and manifold pressure with the burn-
ers operating must be as specified on the rating plate.
Gas Pressure
Gas inlet pressure should be checked and adjusted in
accordance to the type of fuel being consumed.
With Power and Gas Off:
1. Connect a water manometer or adequate gauge to the
"inlet pressure tap" of the gas valve (See Figure 33).
As an alternative method, inlet gas pressure can also
be measured by removing the cap from the drip leg and
installing a predrilled cap with a hose fitting (See Figure
35).
to the Off
to the On position (Fig-
High Manifold
Regulator Adjustment
Screw (Under Cap)
PM
C
HI
Outlet (Manifold)
Low Manifold
Pressure Tap
(Side of Valve)
Screw (Under Cap)
With Power and Gas On:
2. Put furnace into heating cycle and turn on all other gas
consuming appliances.
Natural
Propane
Note: Inlet Gas Pressure Must Not Exceed the Maximum
Value Shown.
If operating pressures differ from above, make necessary
pressure regulator adjustments, check piping size, etc.,
and/or consult with local utility.
Outlet
Measuring Inlet Gas Pressure
Gas Manifold Pressure Measurement and Adjustment
NOTE: The gas manifold pressure must be measured with
the burners operating.
Connect a "U-Tube" manometer having a scale range from
0 to 12 inches of water to the tapped opening in the gas
valve. See "Outlet (Manifold) Pressure Tap" in Figure 33.
Check your measurements. For natural gas, the manifold
pressure must between 3.0 and 3.6 inches water column
(3.5 nominal). The low stage manifold pressure must be
between 1.6 and 2.2 inches water column (1.9 nominal).
For propane gas, it must be between 9.7 and 10.3 inches
water column (10.0 nominal).
pressure must be between 5.7 and 6.3 inches water column
(6.0 nominal). Any major changes in flow should be made
by changing the size of the burner orifice.
If pressure adjustments are necessary, make them in small
variations. To adjust, use the pressure regulator. Remove
the adjustment screw or cover on the gas valve. Using a
3/32" Allen wrench, turn out (counterclockwise) to de-
crease pressure, turn in (clockwise) to increase pressure.
22
Inlet Gas Pressure
Min. 5.0" W.C., Max. 10.0" W.C.
Min. 11.0" W.C., Max. 13.0" W.C.
Figure 34
Inlet Gas Pressure
Gas Line
Gas Shutoff Valve
Gas Line
To Furnace
Open To
Atmosphere
Drip Leg Cap
With Fitting
Manometer Hose
Manometer
Figure 35
(Alternate Method)
The low stage manifold
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