34
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
SIT Millivolt Gas Valve
Pilot for SIT Millivolt
Gas Valve
Figure 60
b. Attach manometer to the manifold side
pressure test fi tting and verify manifold pres-
sure reads 3.5 inches water column (0.87
kPa) for natural gas, and 10.0 inches water
column (2.49 kPa) for propane gas.
c. Refer to
Figure 60
and remove the pilot hood
assembly to access the hexed pilot orifi ce.
Remove and replace the orifi ce with the one
provided with the kit.
Pressure
Regulator
Remove
These
Components
Figure 59
Pilot
Orifi ce
P
S
I
OFO
F
F
I
ONO
N
CONTROLC
O
N
T
R
O
L
IG
N
IT
E
Gas Valve
Assembly
Manifold
Pressure
Test Port
Slotted
Cap
Spring
Adjusting
Screw
Figure 62
Figure 61
All Models
Step 8
. (Refer to
Figure 58 on Page 33
)
A. Remove the two orifi ces from the manifold
and replace them with the ones provided in the
kit.
Table 14
shows the orifi ce sizes for natural
and propane models.
Figure 63
illustrates the
orifi ce.
B. Install rear burner fi rst, followed by front
burner, as shown in
Figure 64
. Ensure that the
arm of the venturi of each burner is hooked onto
the air shutter adjustment lever (refer to
Figure
58
on
Page 33
)
. The primary air opening can
be adjusted by rotating the adjustment lever
from beneath the fi rebox fl oor. Refer to
Figure
56
on
Page 30
for the recommended minimum
primary air opening setting.
Pilot
Orifi ce
Pilot
Assembly
Igniter
Assembly
Retaining
Clip
Flare Nut
When reinstalling the igniter assembly, use
extreme care to prevent damage and break-
age. Do not apply any leverage to the igniter
assembly while restoring the retainer clip to
its original position.
Note: If the igniter is damaged, a replacement kit
is available, order Catalog No. 87L54.
Electronic Appliances
Step 7.
Honeywell Electronic Valves
- See
Figure 61
and the instructions provided with
the kit. Remove the slotted cap screw, o-ring,
pressure-regulating adjusting screw and spring.
Retain all parts for possible later use. Install
new components from the kit. Black cap and
red spring for propane gas appliances. Silver
cap and stainless steel spring for natural gas
appliances. Before installing the cap, attach
manometer to the manifold side pressure test
fi tting and adjust screw until pressure reads
3.5 inches water column (0.87 kPa) for natural
gas, and 10.0 inches water column (2.49 kPa)
for propane gas.
See
Figure 62
and replace the pilot orifi ce as fol-
lows: Remove the igniter assembly retainer clip,
and carefully remove the igniter assembly.
Exercise extreme care to prevent damage to
or breakage of the igniter assembly
.
Remove the screw securing the pilot assembly
to its mounting bracket. Back off the fl are nut
at the end of the pilot gas line to free the pilot
assembly from the gas line. Remove the pilot
orifi ce and replace it with the one provided with
the conversion kit. Reinstall the pilot assembly
by reversing the
steps
detailed here.
• •
Burner Orifi ce Sizes (all models)
Elevation
Feet (meters)
Natural Gas
drill size (inches)
Propane
Gas
drill size (inches)
0-4500
(0-1372)
#44 (.086")
*
60J8001 •
#55 (.052")
*
19L5201 •
Table 14
* Standard size installed at factory
• Part /Cat. Number
• • Each model has two burners & 2 Orifi ces
Step 5.
Attach manometer to the manifold side
pressure test fi tting and verify manifold pres-
sure reads 3.5 inches water column (0.87 kPa)
for natural gas, and 10.0 inches water column
(2.49 kPa) for propane gas.
Step 6.
Refer to
Figure 60
and remove the
pilot hood assembly to access the hexed pilot
orifi ce. Remove and replace the orifi ce with
the one provided with the kit.
