9/15/2011 Hearth & Home Technologies ©
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System Basics
IntelliFire Plus Troubleshooting
IPI Gas Valve w/ Stepper Motor
Important gas supply information provided in
HHT gas fireplace Owner’s Manual, Installa-
tion and Operation.
1.
Pilot regulator
is stamped as Nat
or LP, designating the factory set-
ting. If converted the main burner
regulator has fuel type stamped
along the side, indicating the con-
version. The
orange
wire from the
ipi ignition module is connected to
the pilot regulator.
2. Test the
inlet pressure
at this tap.
3. Test the
manifold pressure
at this
tap.
4. The
stepper motor
is not a replace-
able as a separate part, only available
assembled to the main burner regulator.
It’s function is to modulate the flame.
There is no reliable field voltage test for
the stepper motor. Valve will function
without functioning stepper motor, but
flame will not modulate.
*** Note: An
audible noise will be heard when the
stepper motor is modulating flame dur-
ing flame adjustment, in thermostat
mode and when flame is turned off.***
5.
Main burner regulator
is changed
when unit is converted and comes with
stepper motor installed. The
green
wire
from the ipi ignition module is connected
to the main burner regulator.
1.
Pilot Regulator
5.
Main Burner Regulator
2.
Inlet
Pressure
Tap
3.
Manifold
Pressure
Tap
4.
Stepper
Motor
