Gas Pressure Checks - L.B. White I17 Owner's Manual And Instructions

A. Preparation
1. Obtain a pressure gauge test kit part no. 20736.
2. Close the fuel supply valve to the heater.
3. Brush or blow off any dust and dirt on or in the vicinity
of the gas control valve.
4. Disconnect the gas hose from the heater.
B. Gauge Installation
1. Connect the pressure test kit between the heater and
its gas supply hose as shown in Fig. 27. Insure both
gas shut-off valves on the test kit are in the closed
position when connecting the kit to the heater and
gas supply.
2. Open the fuel supply valve to the heater.
3. Open only the gas shut-off on the test kit to which the
gas supply hose is connected.
4. Adjust the thermostatic head to its maximum setting
and light the heater.
FIG. 27
FUEL SUPPLY VALVE
(OPEN THIS VALVE TO
USE PRESSURE GAUGE)
C.Reading Pressures
TEST KIT HOSE
PRESSURE GAUGE KIT
20736
OPEN
GAS SUPPLY HOSE

GAS PRESSURE CHECKS

1. With the heater operating at full heat output and at
minimum heat, the pressure gauge should read the
pressure specified on the dataplate of the zone
panel.
2. Does the reading on the gauge of the test kit agree
with that specified on the dataplate? If so, then no
further checking or adjustment is required. Proceed
to Section D.
3. If the pressure does not agree with that specified on
the dataplate, then the regulator controlling gas
pressure to the heater requires adjustment.
D. Completion
1. Once gas pressure has been confirmed and/or
properly set, close the fuel supply valve to the heater
and allow the heater to burn off any gas remaining in
the gas supply hose.
2. Remove the gauge kit and reconnect the heater's gas
hose to the heater.
3. Reconnect the heater to its electrical supply.
4. Open the main fuel supply valves to the heater. Light
the heater.
5. Set thermostatic head to desired temperature.
GAS INLET OF HEATER
19