Daikin WGZ200DW - Page 38

38 WGZ030D through WGZ200D OMM 1130-2
Off
Pumpdown Auto
T1
T4
T3
T2
Power On
Unit State Diagram
Evaporator Water Pump State Control (Evap State)
The state-transition diagram shown below controls operation of the evaporator pump.
Off
Run Start
Unit State=Auto OR
Evap Water Freeze Alarm
Unit State = Off AND
No Evap Water Freeze Alarm
[Evap Pump State = Start
AND Flow Switch Closed]
for time > Evap Recirc Tmr
Unit State = Off AND
No Evap Water Freeze Alarm
Evaporator Pump State Diagram
Pump Selection
The pump output used will be determined by the Evap Pump Control set point. The setting allows the
following configurations:
#1 only – P
ump 1 will always be used.
#2 only – Pump 2 will always be used.
Auto – The primary pump is the one with the least run hours, the other is used as a backup.
#1 Primary – Pump 1 is used normally, with pump 2 as a backup.
#2 Primary – Pump 2 is used normally, with pump 1 as a backup.