Gas Pressure Checks - L.B.White Guardian AD/AW060 Manual Del Usuario E Instrucciones

22
Guardian LP or Natural Gas Heater

Gas Pressure Checks

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.
■ 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. 26. Remove the pressure tap plug
using a 3/16 in. allen key.
Owner's Manual • Guardian
FIG. 26
ON
OFF
INLET PRESSURE TAP
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 pres-
sure 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 do not agree with that
specified on the dataplate, then the regulator
controlling gas pressure to the heater requires
adjustment.
4. If the inlet pressures are 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. 24 for regulator
location.
FIG. 27
OUTLET PRESSURE TAP
INTERNAL PRESSURE REGULATOR
LOW PRESSURE GUAGE
EXAMPLE SHOWS PRESSURE FOR PROPANE GAS
ALWAYS REFER TO PRESSURE ON DATAPLATE
OUTLET PRESSURE TAP
LOW PRESSURE GUAGE
ON
OFF
INLET PRESSURE TAP