Premier Ductable Heater
Owner’s Manual • Premier Ductable Heater
23
Gas Pressure Checks
■ The following explains a typical procedure to be
followed in checking gas pressures.
■ The gas pressures will vary depending upon fuel
type.
■ Consult the dataplate on the heater or page 4 in
this manual for specific pressures to be used in
conjunction with this procedure.
■ Gas pressure measured at the inlet to the
gas valve is Inlet Pressure and gas pressure
measured at the outlet of the gas valve is Burner
Manifold Pressure.
A. Preparation
1. Obtain two pressure gauges capable of reading
up to 35 in. W.C.
2. Disconnect the heater from the electrical supply
and close the fuel supply valve to the heater inlet.
3. Open the burner access panel.
4. Brush or blow off any dust and dirt on or in the
vicinity of the gas control valve.
B. Gauge Installation
1. Locate the inlet and outlet pressure taps, see Fig.
27. Loosen the pressure tap screw using a 3/32
Allen key.
WARNING
■ Do not disassemble the gas control valve.
■ Do not attempt to replace any components of
the gas control valve.
■ The gas control valve must be replaced if any
physical damage occurs to the control valve
assembly.
■ Failure to follow this warning will result in fire
or explosions, leading to injury or death to
humans, and property damage.
FIG. 27
2. Securely connect a pressure gauge to each pressure
tap.
3. Open the fuel supply valves to the heater and reconnect
the heater electrical supply.
4. Start the heater
C. Reading Pressures
1. With the heater operating, the pressure gauges should
read the pressures specified on the dataplate .
2. Do the readings at the inlet and outlet pressure gauges
agree with that specified on the dataplate? If so, then
no further checking or adjustment is required. Proceed
to section D.
3. If the inlet pressures is not agree with that specified on
the dataplate, then the regulator controlling gas pres-
sure to the heater requires adjustment.
4. If the inlet pressures is correct and the burner manifold
pressure does not agree with that specifed on the
dataplate, then the gas control valve’s internal pressure
regulator requires adjustment. See Fig. 27 for regulator
location.
5. Remove the regulator pressure tap cap screw and
adjust the internal screw to increase (clockwise) or de-
crease (counter clockwise) the pressure to the desired
pressure.
6. Install the regulator cap back onto the gas valve when
completed. Tighten securely.
Outlet
Pressure
Tap
Regulator
Adjustment Cap
Inlet Pressure Tap
