Refrigeration; Damper Control - Greenheck DOAS v8.1 Reference Manual

Control Variables

Refrigeration

Control Variables
Refrigeration
Compressor Control
Control Variables
Refrigeration
Pressure Control
Control Variables
Refrigeration
Heat Pump Control
Control Variables

Damper Control

Menu
c d
ompressor ehumidiFicaTion
In dehumidification mode, the lead compressor will continue to run as long as
the dehumidification mode sequence is enabled in order to prevent compressor
cycling and potential re-evaporation of moisture. To disable this operation and
allow the compressor to cycle in dehumidification mode, uncheck the applicable
cooling ramps.
The Refrigeration menu allows the user to view and adjust compressor and
condenser settings, if equipped.
c c
ompressor onTrol
Consult factory prior to adjusting parameters in the compressor control menu.
p c
ressure onTrol
Consult factory prior to adjusting parameters in the pressure control menu.
c c
ompressor onTrol
Allows the user to adjust heat pump heating control setpoints.
a -s h p
ir ource eaT ump
The screen allows the user to adjust the minimum ambient temperature the
compressors can be utilized for heating. When the outside air temperature drops
below this temperature, heating with the compressors will not be allowed.
h p d
eaT ump eFrosT
Consult factory prior to adjusting setpoints related to heat pump defrost
operation.
The Damper Control menu's allows the user to adjust damper control setpoints.
F d d
an amper elay
This screen allows adjustment for delay time between damper opening and fan
operation. This timer allows the damper to open before the fan start sequence
begins. This prevents the fans from having to overcome higher static pressure
when the damper(s) are opening.
oad sF r
eseT
This screen only appears if equipped with a modulating OA damper. Checking
the box will allow the outside air damper to modulate between the min and max
positions proportionally based on the supply fan speed.
o d p
uTside amper osiTion
This screen only appears if equipped with a modulating OA damper. The screen
displays the min and max positions for the outside air damper. These setpoints
reflect the percentage of the outside air damper being opened.
F
orce
a l
mbienT ockouT
- o
ccupied
Microprocessor Controller for DOAS 23