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Premium Commercial Controls
ERV
62
There are several special settings for the two-stage cooling.
u
In cases where the condensing unit is tied to only the first compressor, set only allow comp 2
is comp 1 in on: to YES. (Because of minimum off times it is normally possible that the
second compressor turns back on before the first).
u
Interstage delay: the is a delay between when the compressors are allowed to stage. It is
defaulted to 180s.
u
Normally the second compressor turns off at the same percentage that the first turned on
and the first turns off at setpoint. If you set Specify Off Values: to YES, it will turn them off at
the values specified.
7.5 ADJUSTMENTS FOR TWO-STAGE COOLING
The system allows you to turn the unit on and off based on CO2 Level. This is useful when the
ERV has been added specifically to give more fresh air to a space when occupied, such as a
church.
The CO2 sensor must be enabled and installed.
7.6 TURN UNIT ON AND OFF BASED ON CO2 LEVEL
The feature needs to be enabled.
The setting for CO2 level to turn off is set, as well as a hysteresis value that is added to this to
turn on and one that is subtracted from this to turn off.
SPECIAL FEATURES
