PB Heat MI/MIH series - Manual (Page 30)

A. SHUT-DOWN CAUSED BY PILOT
OUTAGE, BLOCKED VENT SHUT-OFF
SWITCH OR FLAME ROLL-OUT SAFETY
SHUT-OFF SWITCH
In the event of a shut-down caused by a pilot outage,
action of the blocked vent shut-off switch or flame roll-
out safety shut-off switch effecting a shut-down of the
main burners:
a. Refer to the Lighting/Operating Instructions in
Figures 7.4 and 7.5 to properly turn off the gas to
the boiler.
b. Turn off all electric power to the boiler.
c. Call a qualified heating service organization or local
gas company and have the cause of the shut-down
investigated and corrected.
d. Refer to Lighting/Operating Instructions to
re-start boiler.
B. TROUBLESHOOTING GUIDES
Use Table 8.1 to assist in determining causes and
providing corrective actions to boiler problems. Refer
also to Figure 8.1 to troubleshoot the Intermittent
Ignition System Control. These guides must be used
only by qualified service technicians. These individuals
must follow all applicable codes and regulations in repair
of any boiler problems.
TROUBLESHOOTING
8. TROUBLESHOOTING
Should overheating occur or the gas supply fail to
shut off, do not turn off or disconnect the electrical
supply to the pump. This may aggravate the problem
and increase the likelihood of boiler damage. Instead,
shut off the gas supply at a location external to the
appliance.
CAUTION
Do not use this appliance if any part has been under
water. Improper or dangerous operation may result.
Immediately call a qualified service technician to
inspect the boiler and to replace any part of the
control system and any gas control which has been
under water.
WARNING
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
CAUTION
When servicing or replacing items that communicate
with the boiler water, be certain that:
● ● There is no pressure on the boiler.
● ● The boiler is not hot.
● ● The power is off.
When servicing the gas valve or pilot, be certain that:
● ● The gas is off.
● ● The electricity is off.
DANGER
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