Pressure Regulator Adjustment | White Rodgers 36h specification

PRESSURE REGULATOR

ADJUSTMENT

These controls are shipped from the factory with the regulator set as specified on the control label. Consult the appliance rating plate to ensure burner manifold pressure is as specified. If another outlet pressure is required, follow these steps.

NOTE

Natural Gas:Two-Stage Models - Low outlet pres- sure can be adjusted in the 1 to 3.5” W.C. range and high outlet pressure can be adjusted in the 2.5 to 5” range. The valve cannot be adjusted outside this range and the high outlet pressure setting must always be set at least 1.5” above the low outlet pressure setting.

Single Stage Models - Outlet pressure can be ad- justed in the 2.5” to 5” range. The valve cannot be adjusted outside this range.

ADJUSTMENT

4.	(2-stage only) Remove regulator cover screw
	from the low outlet pressure regulator adjust
	tower (fig. 9) and turn screw clockwise (		)
	to increase pressure, or counterclockwise
	(	) to decrease pressure. Always adjust
	regulator according to original equipment
	manufacture’s specifications listed on the ap-
	pliance rating plate. Replace regulator cover
	screw.
5.	(2-stage only) Set thermostat to call for high
	stage.
6.	Remove regulator cover screw from the single
	stage or high outlet pressure regulator adjust
	tower (fig. 9) and turn screw clockwise (		)
	to increase pressure, or counterclockwise
	(	) to decrease pressure. Always adjust
	regulator according to original equipment
	manufacturer’s specifications listed on the
	appliance rating plate. Replace regulator cover
	screw.
7.	Turn off all electrical power to the system.
8.	Remove manometer hose and fitting from

Low regulator cover screw (two stage only)

Regulator adjust screw Regulator spring

Pilot cover screw Pilot gasket

Pilot adjust screw

Pilot outlet

Single stage and two stage high regulator cover screw

Regulator adjust screw

Regulator spring

Outlet pressure tap

outlet pressure tap.

9. Replace outlet pressure tap plug and tighten

(clockwise 40-60in-lb.)

10. Turn on system power and set thermostat to

call for heat.

11. Using a leak detection solution or soap suds,

check for leaks at pressure tap plug. Bubbles

forming indicate a leak. Shut off gas and

Fix all leaks immediately.

Pilot Flame Adjustment

If the pilot flame is low and does not engulf the flame sensor, the system will not energize the main valve. If pilot gas pressure is too high, gas

Figure 9. Pressure Adjustment

Outlet Pressure Adjustment

1.Turn off all electrical power to the system.

2.Remove plug and install hose barb fitting and manometer to pressure tap on outlet end of valve. See fig. 9.

3.Turn on system power. Set thermostat to call for heat (low stage for two-stage systems). Main burner should light. Proceed to step 6 for single stage systems.

will sputter past the ignition electrode, and may not ignite. High pilot gas pressure may also cause the flame to lift off the burner, causing the flame sensor to sense “low” heat.

To adjust the pilot gas pressure, remove the cover screw (See fig. 9). To reduce pilot pressure, turn the pilot adjust screw (beneath the cover

screw) clockwise () . To Increase pilot pressure, turn the pilot adjust screw counterclock-

wise (). Replace and tighten cover screw.