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Compressor Timers
Minimum ON:
30s
Minimum OFF:
180s
Between Stages:
30s
Compressor Staging
Stage1: ON @ 50% OFF 0%
Stage2: ON @ 100% OFF 50%
Heater Controller
Integration:
300s
Band:
20°F
Reheat Setup
Will heater be used for reheat
during dehumidification?
Reheat:
Disable
Reheat Setup 2
Will heater be used for reheat
along with hot gas?
Heater:
Disable
Hot Gas Controller
Integration:
300s
Band:
20°F
Hot Gas Setup
Hot gas reheat coil minimum
on/off time:
10minutes
®
T
his screen displays The compressor minimum
This screen only appears if DX cooling was provided with the unit.
The compressor minimum ON/OFF times prevents short cycling of the
compressors.
T
his screen displays when each compressor in a single or dual sTage
/
uniT will engage
disengage
This screen only appears if DX cooling was provided with the unit.
Each compressor will engage and disengage based upon the percentage of
cooling capacity the controller needs.
T
his screen allows adjusTmenT of The
This screen only appears if heating option was provided with the unit.
The controller utilizes a PI loop control for heating. This allows for less
sporadic changes in supply temperature, resulting in a smooth reaction to
changing conditions. To speed up reaction time, decrease the integration
time. For slower reaction time, increase the integration time. When making
adjustments, make them in small increments and test the system to determine
if the new setting is adequate prior to further adjustment. The band is the
range that the integration will occur between.
T
his screen allows The user To enable The heaTer for reheaT purposes
This screen appears if a heating option was provided and the unit does NOT have
hot gas reheat OR a heat pump.
If it is desired that the heater be used to reheat the air off of the cooling coil when
in dehumidification, adjust this screen so the heater is ENABLED for reheat.
T
his screen allows The user To enable The heaTer To provide reheaT in
addiTion To hoT gas reheaT
This screen appears if hot gas reheat and a heating option was provided (except
heat pump).
Setting the heater parameter to enable allows the heating option to provide
additional reheat beyond what the hot gas reheat can provide. This would
typically only be used if the supply air temperature is too cold.
T
his screen allows adjusTmenT of The
This screen only appears if hot gas reheat was provided with the unit.
The controller utilizes a PI loop control for reheat. This allows for less sporadic
changes in supply air temperature, resulting in a smooth reaction to changing
conditions. To speed up reaction time, decrease the integration time. For
slower reaction time, increase the integration time. When making adjustments,
make them in small increments and test the system to determine if the new
setting is adequate prior to further adjustment. The band is the range that the
integration will occur between.
T
his screen allows adjusTmenT of The minimum
.
gas reheaT coil
This screen appears if ON/OFF hot gas reheat was provided with the unit.
This is the minimum on/off time operation for the hot gas reheat coil. The
minimum run time prevents short cycling of the coil, allowing for better oil
distribution through the DX system. CONSULT THE FACTORY BEFORE
CHANGING MINIMUM ON/OFF HOT GAS REHEAT TIMES.
on
and
.
h
pi
eaTing
conTrol loop
h
g
r
oT
as
eheaT
on/off
DDC Controller for Tempered Air Products
off
.
Times
dx
.
.
pi
.
conTrol loop
Times for The hoT
23
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