Premier Ductable Heater
Owner’s Manual • Premier 40
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 speci
fi
c 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. 21. Remove the pressure tap plug
using a 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
fi
re
or explosions, leading to injury or death to
humans, and property damage.
FIG. 21
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 speci
fi
ed
on the dataplate .
2. Do the readings at the inlet and outlet pres-
sure gauges agree with that speci
fi
ed 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
speci
fi
ed on the dataplate, then the regulator
controlling gas pressure 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. 21 for regulator location.
5. Remover the internal pressure tap cover
screw. See FIG. 21 for location.
6. Using a screwdriver turn the internal adjusting
screw to increase/decrease the pressure to
desired pressure.
7. Put the cover screw back on the gas valve
and tighten securely.
Outlet Pressure Tap
Pressure Adjustment
Inlet Pressure Tap
