Operating instructions

P/N XG0668
Page 4
Gas Conversion Kit
Gas Conversion Instructions
Checking the Gas Pressure
To check the Inlet and Manifold gas pressures, a Water Column Pres-
sure Gauge with 5/16" dia. tubing can be used. To test the Manifold
Pressure, loosen the screw shown in Figure 6. Attach the gauge to
the Manifold Pressure Test Connection and open the gas shut-off
valve. The tubing must be tight in the connection to prevent gas leaks.
Measure the Manifold Pressure and compare the value against the
chart below.
Figure 6. Sit Nova 820 gas valve.
Natural Gas Liquid Propane
Manifold Pressure (min.) 3.5" W.C. 10" W.C.
Inlet Pressure (min.- max.) 5.5" - 14" W.C. 11" - 14" W.C.
" W.C. = inches water column
Turn off the fireplace and close the shutoff valve. Remove the test
gauge. Re-tighten the test connection screw to prevent gas leak-
age.
Repeat the procedure for the Inlet Pressure.
If the pressure readings are not within the limits set out, contact the
factory. If the pressure readings are correct, ensure that both test con-
nection screws are tightened securely, to prevent a gas leak.
Pilot Burner Adjustment
1. Locate the Pilot Adjustment Screw on the gas control valve. (See
figure 6)
2. Adjust pilot screw to provide properly sized flame as shown in fig-
ure 7). To increasethe flame, turn the screw counterclockwise. To
decrease the flame, turn it clockwise. The flame should impinge
on the thermocouple and thermopile.
3. After installing or servicing, leak test using a soap solution with
main burner turned on. Coat pipe and tubing joints, gasket etc.
with soap solution. Bubbles indicate leaks. Tighten any areas
where the bubbles appear until the bubbling stops completely.
Manifold Pressure
Test Connection
Pilot Adjustment Screw
Inlet
Pressure
Power
Generator
Wall Switch
9. Re-install the rear burner and ensure that the pilot burner is
correctly positioned. The pilot and burner should be replaced
exactly as it was removed. Make any necessary adjustments
before proceeding with the conversion.
Main Gas Control Regulator:
10. The SIT Hi/Lo gas control valve supplied with this appliance has
a removable regulator. To replace it, remove the three screws
as shown in Figure 5, and install the new regulator supplied with
this kit.
Figure 5. Replacing the regulator on the Sit Nova 820 gas control
valve.
11. The label (part no. XL0201) indicating that the fireplace has been
converted for use with a different gas must be placed on the
fireplace rating plate over top of the existing fuel type chart.
The label (part no. XL0200) indicating who converted the ap-
pliance must be filled out and placed on the base pan, directly
under the gas valve.
Also place the label indicating that the control valve has been
converted for use with a different gas.
remove screws to
replace regulator
Figure 7. Pilot Burner