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AIR PUMP OPERATION
Both pumps will start and position up to 30 dampers any time there is a call for heating, cooling or
fan operation. Both pumps will stop three minutes after the last thermostat is satisfied. Pumps
will restart for any call for heating, cooling or fan from any thermostat. Both pumps are delayed
one minute on a call for heat (fossil fuel) to allow the blower to start before any dampers close.
Pumps are designed for continuous duty.
MANUAL PUMP SWITCH (MPS™)
The Manual Pump Switch (MPS) (Fig. 12b) is provided to test the damper system and to bypass
the zoning system in case of a board emergency. This switch will start the pumps manually
and with the “Power” switch in the OFF position, all the zone dampers will open. This will aid in
troubleshooting by allowing the operation of the HVAC system independent of the Arzel panel, if
you suspect a PC board failure.
YOU CAN BYPASS THE ZONING SYSTEM BY FOLLOWING STEPS BELOW:
1.
Turn the Arzel PWR switch off. You must keep this switch in Off position to block ALL
zone thermostats from calling for service and placing all the zone dampers in the
normally open position.
2.
Disconnect the wires from any one zone thermostat terminal and connect them to the
HVAC Output terminals.
3.
Turn the MPS switch
to manual position
.
The HVAC equipment will now be controlled by the one thermostat connected to the Output
terminals. The pumps will run continuously, holding ALL the
zone
dampers open.
Fig. 12b
Arzel Panel
Pump Operation
