34
START
Turn knob to a desired
temperature zone.
Turn switch on.
NO
After six (6) seconds,
does the pilot spark?
YES
Is the pilot lit?
NO
NO
YES
YES
Do the burners light?
END
NO
YES
Is there power to the heater?
Check the gas valve. There must be 24VAC
between
PV
and
MV/PV
.
The home circuit breaker may have tripped.
Check and reset if necessary.
1. Verify that the time clock is in the “ON” position.
2. Check to see if the pump strainer basket is full. Remove debris
if necessary.
3. Check to see if the filter is dirty. If it is, backwash or clean the
filter.
4. The pump may have lost its prime and be running dry. Check
the pressure on the filter. If there is no pressure, then there is
not enough moving water in the system (or the gauge is
broken). Attempt to make the pump run at its normal flow rate.
Does the pilot spark after performing the above steps?
1. The setpoint may be lower than the actual temperature. Turn
the knob counterclockwise to raise it.
2. Check the high limits. Both are normally closed.
3. Check the rollout switch. It must be normally closed.
4. Check the wiring in the control box against the wiring diagram.
NO
Ensure that the heater is OFF. Attempt each of the following steps
individually, and manually restart the heater after each attempt.
1. Check the gas line for air in the system.
2. Ensure that the high tension wire is not grounding out to metal
or to other voltage wiring.
3. Verify that the high tension wire is properly connected to the
ignition module.
4. Check the gas valve. There must be 24VAC between
PV
and
MV/PV
.
YES
ANALOG CONTROL LOGIC - FLOW CHART
Summary of Contents for 106
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