L.B. White Guardian 2.0 AD/AW100 Serie Manuel Du Propriétaire page 21

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, on the
gas valve, see Fig. 27, 28 and 29.
• Fig. 27 for AD/AW060/100/250.
• Fig. 28 for AW325
• Fig. 29 for Smart Sense.
For Fig. 27 & 28, remove the pressure tap
plug using a 3/16 in. hex key. For Fig. 29, use a
small slotted screwdriver to loosen the pressure tap.
Guardian 2.0 LP or Natural Gas Heater
Turn both screws one full turn counterclockwise. DO
NOT remove the pressure tap screws.
FIG. 27
INLET PRESSURE TAP
FIG. 28
INLET PRESSURE TAP
FIG. 29
OUTLET
PRESSURE TAP
2. Securely connect the pressure gauge hose to each
pressure tap. A barb fitting will be require for Fig. 27
& 28 gas valve.
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.
Owner's Manual • Guardian 2.0
OUTLET PRESSURE TAP
OUTLET PRESSURE TAP
INLET
PRESSURE TAP
21