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P a g e
Miscellaneous wiring to the upper right tabs of control board as marked:
FLOW – connect a normally open (NO) flow switch. If there is a call for DHW, fan will
shut down and resume once the call for DHW has ended
BOILER – dry contacts to initiate heat source
AUX 24V – 24VAC output for humidifier or other accessory. Active when heating is on
0-10V – 0 to 10VDC output to drive a variable speed pump (if installed). Variable speed
pump will run at LO, MED or HI speeds in the multi-stage mode. Note if a standard AC
pump is used, the pump will run at a single speed
Summary of Contents for ES50LVS
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