Gas Pressure Checks
WARNING
■ Do not disassemble the regulator, or the
solenoid valve.
■ Do not attempt to replace any internal compo-
nents of the regulator or solenoid.
■ These components must be replaced if any
physical damage occurs to the gas terrain
assembly.
■ Failure to follow this warning will result in fire
or explosions, leading to injury or death to
humans, and property damage.
ATTENTION:
■ The following explains a typical procedure to be followed
in checking gas pressures.
■ The gas pressures will vary depending upon fuel type.
■ Consult the data plate on the heater or page 5 in this
manual for specific pressures to be used in conjunction
with this procedure.
■ Gas pressure measured at the inlet to the regulator is Inlet
Pressure and gas pressure measured at the neck of the
combustion head is Burner Manifold Pressure.
MATERIALS REQUIRED
Quantity
Description
2
Gas pressure gauges capable of reading up to
35 in. w.c./8.7 kPa. (may be ordered from L.B.
White, part #550-00764)
1
#4 standard screwdriver
A. Preparation
■ Brush or blow off any dust or dirt in the vicinity of the
combustion head and regulator.
■ Close the fuel supply valves and disconnect the heater
electrical supply.
B. Gauge Installation
CI500 / CI750
1. Locate the pressure tap on the combustion head.
Pressure tap
Foreman Ductable Dual Fuel Indirect-Fired Heater
Owner's Manual • Foreman
2. Loosen the slotted screw inside the pressure tap.
3. Continue to bullet #6.
CI230
4. Locate the pressure tap on the gas control valve.
Outlet tap
5. Remove the allen plug and install a 1/8 NPT barb.
6. Securely connect a pressure gauge to the barb.
7. Open the fuel supply valves and reconnect the heater
electrical supply.
8. Start the heater.
C. Reading Pressures
1. With the heater operating, the pressure gauges should
read the burner manifold pressures specified on the data
plate.
2. If so, then no further checking or adjustment is required.
Proceed to section D.
3. If the burner manifold pressures do not agree with that
specified on the data plate, then the regulator controlling
gas pressure to the heater requires adjustment.
D. Completion
1. Once the proper inlet and burner manifold pressures have
been confirmed and/or properly set, close the fuel supply
valve to the heater and allow the theater to burn off any
gas remaining in the gas supply.
2. Disconnect the heater from is electrical supply and close
fuel supply valve.
3. Remove the gauges.
4. Close the pressure tap screw by turning CW.
5. Open fuel supply valve and reconnect electrical supply to
heater. Start the heater and check for gas leaks.
6. Set thermostat to desired temperature.
29
Inlet
tap