Daikin WGZ030DW Operating And Maintenance Manual page 66

Set Air-Cooled Condenser Fans
Water-cooled = Off
SET FANS SPs
Fan Stages=X
Speedtrol=Yes/No
Water-cooled = Off
SET FANS SPs
Stage ON Deadband (°F)
Stg2 Stg3
XXX XXX
Water-cooled = Off
SET FANS SPs
Stage Off Deadband (°F)
Stg2 Stg3 Stg4
XXX XXX XXX
The SET FANS SP screens 2 through 5 establish the temperature that will stage the condenser fans on and
off. These screens apply only to units set up for use with air-cooled condensers (WaterCooled=No). On
such units, the settings do not have to be entered if the unit controller is not used to stage condenser fans
for head pressure control. If the MicroTech II unit controller is not used to control the fans, some other
method must be used.
Water cooled=Off
SET FANS SPs
Cond Sat Temp Target
Set Point= XXX.X °F
Water cooled=Off
SET FANS SPs
# Fans On At Startup
>75°F >90°F >105°F
X X
Set Cooling Tower Control
The MicroTech II controller is capable of controlling cooling tower water temperature on chillers using
water-cooled condensers. Output wiring connection points are shown on the field wiring diagrams.
[Water Cooled = Y] - Condenser Pump on with first Compressor on. Tower fan control is active when the
Tower Control setpoint is set to Temperature and the condenser pump is in the RUN state. Staging is
based on Entering Condenser Water Temperature (ECWT). Operation depends on the following.
Condenser pump state
ECWT OR Lift pressure
Stage up and stage down timer values
Tower setpoints (Tower Control, Tower Stages, Stage Up Time, Stage Down Time, Stage Differential,
Stage #1 ON, Stage #2 ON, Stage Down @, Stage Up @)
When the condenser pump starts, the stage up timer shall start. The first stage shall turn ON when the
following conditions are met:
The stage up timer completes
The ECWT is > Stage #1 ON setpoint
66
(1)
(2)
Stg4
XXX
(3)
(4)
(5)
X
WGZ030D through WGZ200D OMM 1130-2