Advertisement
Typical Gas Valve Honeywell
Figure 8
Inlet Pressure
Tap (Hidden)
INLET
Pilot
Adjustment
Outlet Pressure Tap
Connect manometer here to
check outlet pressure. Must be
adjusted per Table 1.
Typical Gas Valve Honeywell
Figure 9
Regulator Adjustment
Under Cap
V
T
INLET
Inlet
Pressure
1
Tap
/
NPT
8
Typical Honeywell
Figure 10
Regulator Assembly
Cap Screw
Pressure
Regulator
Adjusting
Screw
Spring
PRESSURE
REGULATOR
HOUSING
SV9501
Wiring Terminals
Pilot
Outlet
OUTLET
25--22--25
VR8205S
Outlet
HONEYWELL
Pressure
Tap
1
OUTLET
ON
OFF
25--24--98a
LP
Natural
Gas
Gas
Black
Silver
White
White
Stainless
Red
Steel
-- 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.
Manifold Assembly -- Be sure to engage the main burner
D
orifices in the proper openings in the burners.
Testing for leaks -- After reassembly, turn the gas on and
D
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.
/
NPT
Gas Valve Adjustment
8
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
Advertisement
