2 User Manual

Service Manual
30
3
Troubleshooting
4. Turn on gas supply at the manual gas cock, turn on LP
gas at tank if required.
5. Turn the power switch to the “ON” position.
6. Ensure that the “ON/OFF” knob or the valve is in the
“ON” position.
7. Set the electronic temperature control to call for heat.
8. Observe the gas supply pressure as all burners are
firing. Ensure that inlet pressure is within the specified
range. Minimum and maximum gas supply pressures
are specified in the Gas Supply section of the EnergyRite
Installation and Operation Manual.
9. If gas pressure is out of range, contact a gas utility, gas
supplier, qualified installer, or service agency to
determine necessary steps to provide proper gas
pressure to the control.
10. If the gas supply pressure is within normal range, proceed
to remove gas manometer and replace pressure tap
fittings in the gas control.
11. Turn the power switch to the “OFF” position.
12. Shut off gas supply at the manual gas cock in the gas
piping to the appliance. If fuel supply is LP gas, shut off
gas supply at the tank.
Figure 3-4_Gas Supply Pressure Measurement -
Models ER252 - ER402
Checking gas supply pressure
1. Turn the main power switch to the “OFF” position.
2. Shut off gas supply at the field installed manual gas
cock in the gas piping to the appliance. If fuel supply is
LP gas, shut off gas supply at the tank.
3. On ER152 - ER202 models remove the 1/8" hex plug,
located on the “inlet” side of the gas valve. An inlet
pressure tapping is located on the top side of the valve
body (see FIG. 3-3).
On ER252 - ER402 models remove the 1/8" hex
plug, located in the tee between the low gas pressure
switch and the gas valve (see FIG. 3-4).
A tapping on the field installed main manual gas cock
may also be used. Install a fitting in the inlet pressure
tapping suitable to connect to a manometer or
magnahelic gauge. Range of scale should be 14" w.c. or
greater to check inlet pressure.
Figure 3-3_Gas Supply Pressure Measurement -
Models ER152 - ER202