5
EM-20 Power Relay Mode w/ Short Delay:
is mode shall be used when two appliances (without compressors) are sharing the same
circuit breaker (for example: a microwave and a replace or water heater).
Power is applied to the EM-20. Aer a short delay of approximately 4 seconds, power will be
supplied to both the primary and secondary circuits. e EM-20 constantly monitors current
levels, and will shut down the secondary circuit once levels reach approximately 18A. Once the
current levels have dropped below approximately 5A, power will return to the secondary circuit.
EM-20 Power Relay Mode w/ Long Delay:
is mode shall be used when attempting to combine two loads with compressors that are not
set up to use logic relays.
Power is applied to the EM-20. Aer a delay of approximately 3 minutes, power will be supplied
to both the primary and secondary circuits. e EM-20 constantly monitors current levels, and
will shut down the secondary circuit once levels reach approximately 18A. e “OFF time delay
timer” is then triggered. Once the timer has expired, and the current levels have dropped below
approximately 5A, power will return to the secondary circuit.
EM-20 Logic Relay Mode w/ Short Delay:
is mode shall be used when attempting to combine two air conditioners on one 20A breaker.
ese air conditioners shall be equipped with energy management system inputs and have the
ability to use logic relays for compressor control. THIS MODE SHALL ONLY BE SELECTED
IF THE AIR CONDITIONER CONTROL CIRCUITRY PROVIDES THE NECESSARY OFF-
TIME DELAY ITSELF TO PREVENT SHORT CYCLING THE COMPRESSOR.
Power is applied to the EM-20. Aer a short delay of approximately 4 seconds, power will be
supplied to both the primary and secondary circuits. Both power relays will continue to stay on
for as long as there is power applied to the EM-20. e control is performed through the logic
relays. e EM-20 constantly monitors current levels, shutting down (energizing) the secondary
logic relay when levels reach approximately 18A. Once the current levels have dropped below
approximately 5A, the secondary logic relay will be de-energized.
To Next Page
Loading...
Need help?
General
