Honeywell PGF3 Start--up and Check--out, Reassembly, Gas Valve Adjustment

Figure 8	Typical Gas Valve Honeywell
	SV9501
	Wiring Terminals

Inlet Pressure

Tap (Hidden)

INLET	Pilot
	Outlet

Pilot

Adjustment

			OUTLET
Outlet Pressure Tap
Connect manometer here to
check outlet pressure. Must be			25--22--25
adjusted per Table 1.
Figure 9	Typical Gas Valve Honeywell
		VR8205S

Regulator Adjustment
Under Cap	HONEYWELL		Outlet
			Pressure
			Tap
			1/ NPT
V			8
	T
INLET
Inlet		ON	OUTLET
Pressure
Tap 1/ NPT
8
	OFF		25--24--98a
Figure 10	Typical Honeywell
	Regulator Assembly
		LP	Natural
		Gas	Gas
	Cap Screw	Black	Silver
	Pressure	White	White
	Regulator
	Adjusting
	Screw		Stainless
PRESSURE	Spring	Red	Steel
REGULATOR
HOUSING
			-- 5 --

4.Install the pressure regulator adjusting screw. This will set the manifold pressure close to required setting for normal operation.

5.Replace the regulator cap screw.

6.Attach gas valve conversion label (found in Honeywell con- version kit) to gas valve.

Reassembly

Reassemble all parts in reverse order as removed. Attach Natural Gas Conversion Label next to the unit rating plate. Fill out and attach the Field conversion Label to the front exterior of the furnace.

DManifold Assembly -- Be sure to engage the main burner orifices in the proper openings in the burners.

DTesting for leaks -- After reassembly, turn the gas on and check all joints for gas leaks using a soapy solution. All leaks must be repaired immediately.

Start--up and Check--out

1.Remove the plug from the Inlet Pressure Tap on gas valve and install a manometer. (See Figures 7, 8, 9, & 10)

2.Open manual gas line valve to unit. Check for gas leaks and correct as necessary. Check supply pressure. Refer to Table 2 for proper supply pressure values. If not within these limitations DO NOT OPERATE UNIT, contact gas supplier.

3.Close manual gas line valve to unit, remove manometer and replace inlet pressure tap plug.

Gas Valve Adjustment

4.With the gas valve knob in the OFF position, remove the pressure tap plug from the outlet end of the valve, and con- nect a “U” tube manometer to the pressure port. (See Fig- ure 7, 8, 9 & 10).

5.Turn the gas valve knob to the ON position and restore elec- trical power to unit. Cycle the main burner on and off several times to stabilize the pressure regulator diaphragm. This MUST be done before an accurate pressure reading can be obtained.

6.With the main burner on, read the pressure gauge. Manifold pressure should be adjusted to values from Table 2. Turn pressure regulator adjusting screw clockwise to increase or counterclockwise to decrease manifold pressure. Burner Input must not exceed nameplate rating. Refer to Section “Checking Input Rate”.

7.Turn gas valve to OFF. Remove the pressure gauge and re- place the pressure tap plug and pressure regulator cap screw.

8.With gas valve on, observe furnace through two or more complete cycles to be sure all controls are operating.

462 06 1211 00 3/17/06