SV9440, SV9540, AND SV9640 SMARTVALVE™ SYSTEM CONTROLS
69-1227—02
4
Converting Ignition System Control
from Natural Gas to LP Gas (or LP
Gas to Natural Gas)
WARNING
Fire Or Explosion Hazard. Can cause property
damage, severe injury or death.
1. Do not attempt to convert step-opening
models (suffix letter P).
2. Always change the main and pilot burner
orifices when converting from natural to LP
gas or from LP to natural gas. Carefully follow
appliance manufacturer specifications and
instructions to assure proper appliance
conversion.
3. Ignition system controls are factory-set for
natural (and manufactured) or LP gas. Do not
attempt to use an ignition system control set
for natural (manufactured) gas on LP gas, or an
ignition system control set for LP gas on
natural (manufactured) gas.
Ignitionsystem controls with standard, slow-opening,
and two-stage regulators (model numbers with suffix H,
K, M, or Q) can be converted from one gas to the other
with a conversion kit (ordered separately). See Table 4 to
select the appropriate conversion kit.
Convertible Pressure Regulators
Ignition system controls with suffix letter R are
convertible pressure regulator models. They can be
converted from natural gas to LP gas or from LP gas to
natural gas without a conversion kit.
Before converting the ignition control from one gas to
another, check the ignition control label and the
appliance manufacturer’s rating plate to determine if the
pressure regulator setting (factory set) meets the
appliance manifold requirements after conversion.
NOTE:
Convertible pressure regulator models (suffix
letter R) do not have field-adjustable regulators.
If the factory pressure regulator setting meets the
appliance manifold requirement, convert the ignition
control as follows:
1.
Remove the pressure regulator cap, Fig. 1.
2.
Invert the cap so that the letters appear that repre-
sent the gas type appropriate for the appliance;
NAT for natural manufactured gas, LP for liquid
petroleum gas.
3.
Replace the cap and tighten firmly.
Fig. 1. Top view of convertible pressure regulator cap.
Install Adapters To Control
If adapters are being installed on the control, mount them
as follows:
Flanges
1.
Choose the appropriate flange for your application.
2.
Remove the seal over the ignition system control
inlet or outlet.
3.
Make sure that the O-ring is fitted in the groove of
the flange. If the O-ring is not attached or is miss-
ing, do not use the flange.
4.
With the O-ring facing the ignition system control,
align the screw holes on the ignition system con-
trol with the holes in the flange. Insert and tighten
the screws provided with the flange. See Fig. 2.
Tighten the screws to 25 inch-pounds of torque to
provide a gas-tight seal.
Bushings
1.
Remove the seal over the ignition system control
inlet or outlet.
2.
Apply a moderate amount of good quality pipe
compound to the bushing, leaving two end threads
bare. On an LP installation, use compound that is
resistant to LP gas. Do not use Teflon tape.
3.
Insert the bushing in the ignition system control
and carefully thread the pipe into the bushing until
tight.
Complete the instructions below for installing the piping,
installing the control, and connecting the pilot tubing and
wiring. Make sure the leak test you perform on the
control after completing the installation includes leak
testing the adapters and screws. If you use a wrench on
the valve after the flanges are installed, use the wrench
only on the flange, not on the control. See Fig. 5.
Location
The ignition system controls are mounted in the
appliance vestibule on the gas manifold.
PRESSURE
REGULATOR
CAP
M11678B
N
AT NA
T
LP LP
N
AT NA
T
OR
OTHER SIDE
OF CAP