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H.
Manufacturer
c. Factory Settings
Economizer Controller
Integration
300s
Band:
20°F
Econo ON/OFF times:
Minimum ON:
300s
Minimum OFF:
300s
Supply Fan Cycling
Defrost setup
Fan off time:
5min
Fan on time:
30min
Cooling Controller
Integration:
300s
Band:
20°F
Compressor Setup
# of stages:
Rotation:
LIFO
Digital Compressor
Minimum OFF:
1.0vdc
Minimum ON:
1.9vdc
Maximum:
5.0vdc
Delay OFF:
60s
Max Power Start:
120s
22
DDC Controller for Tempered Air Products
The Factory Settings menu allows adjustment of parameters that are critical for
proper unit operation. Adjustment of these parameters is only recommended with
factory guidance. To access the Factory Settings menu, enter the manufacturer
password (Default=1000).
T
his screen allows The adjusTmenT of parameTers for The economizer
.
funcTion
This screen only appears if an economizer mode was selected with the unit.
The controller utilizes a PI loop control for the economizer function. 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. Range of integration =
Supply set point ± Band.
The minimum ON and OFF times prevent the energy wheel from short cycling
during economizer mode.
T
his screen allows The adjusTmenT The
on/off
.
Times
This screen only appears if Timed Exhaust Frost Control was provided with the unit.
The ON/OFF times prevent the build up of frost when the unit is in Timed
Exhaust Frost Control mode.
T
his screen allows adjusTmenT of The
This screen only appears if cooling option was provided with the unit.
The controller utilizes a PI loop control for cooling. 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 displays The number of sTandard compressor sTages provided
wiTh The uniT and shows The roTaTion sequence
This screen only appears if DX cooling was provided with the unit.
2
The number of stages displayed is equal to the number of non-modulating
compressors. Factory default compressor rotation is LIFO (Last In, First Out).
Compressor rotation can not be changed on units equipped with: Digital
Scrolls, Hot Gas Reheat or Heat Pump.
T
his screen displays The digiTal scroll compressor parameTers
This screen only appears if a digital scroll compressor was provided with the unit.
Minimum OFF: This is the minimum voltage the controller outputs when the
digital scroll is disabled/OFF
Minimum ON: This is the minimum voltage the controller outputs when the
digital scroll is enabled/ON.
Maximum: T his is the maximum voltage the controller outputs when the digital
scroll is operating at full capacity.
Delay OFF: Delays shutting off digital scroll by this duration.
Max Power Start: Upon starting, the digital scroll will run at full capacity for
T
c
ooling
this duration. This ensures the refrigeration system is at
proper conditions, prior to modulation.
e
f
c
imed
xhausT
rosT
onTrol
pi
.
conTrol loop
.
.
®
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