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P a g e
Thermostat is satisfied
R is disconnected from W
Heat generator is turned off
Auxiliary 24VAC power is turned off
Pump turns off and fan speed ramps down to zero, extracting any remaining heat in the
coil
Single-stage Operation
R is connected to W
Heat generator is turned on
Auxiliary 24VAC power is turned on
Pump turns on at 100%
After a 15 second delay to allow for system water to heat up coil, fan ramps up to HEAT
CFM speed
If a variable speed pump is installed, it runs at HI. If a standard single speed AC pump is
installed it runs at HI
Thermostat is satisfied
R is disconnected from W
Heat generator is turned off
Auxiliary 24VAC power is turned off
Pump turns off and fan speed ramps down to zero, extracting any remaining heat in the
coil
Cooling Mode (Multi and Single stage)
(Assumes a condenser and DX coil is installed within the system)
R is connected to Y and Y2*
Condenser turns on
Fan ramps up to COOL CFM setting
* If thermostat and condenser support 2-stage cooling
Thermostat is satisfied
Condenser turns off
Fan speed ramps down to zero, extracting any remaining cooling from the DX coil
Summary of Contents for ES50LVS
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