Daikin WGZ200DW - Page 69

OMM 1130-2 69
Figure 11, Initial Valve Position
Operation After Start
When the condenser pump is in the RUN state, the valve output shall be controlled in one of two modes
as specified by the Valve/VFD Control setpoint. The controlled parameter shall be the condenser entering
water temperature. When the desired output signal varies from 0 to 100%, the output voltage shall vary
as shown below.
0 to 10 VDC (Valve Type = NC)
10 to 0 VDC (Valve Type = NO)
Water-cooled = Y
SET TOWER SPs (5)
Valve SP = XXX °F
Valve DB = XX.X °F
Valve SP is the minimum tower water temperature acceptable, default is 65°F.
Valve DB is the dead-band in degrees, default is 2.0°F.
Water-cooled = Y
SET TOWER SPs (6)
ValveStartPosition
Min = XXX% @XXX°F
Max = XXX% @XXX°F
The ValveStartposition is the position of the valve when the unit starts. Default for minimum start
position is 0%, and 100% for maximum position.
Water-cooled = Y
SET TOWER SPs (7)
Valve Control Range
Min = XXX%
Max = XXX%
Defaults are 10% minimum and 90% maximum.
Water-cooled = Y
SET TOWER SPs (8)
PD Control Loop
Error Gain = XX
Slope Gain = XX
Defaults are 25 for both error and slope.
Max Position @
Setpoint
(90°F)
Min Position @
(60°F)
Min Start Position
(10%)
Initial Valve Position
(values are examples only)
Max Start Position
(90%)
Setpoint
Setpoint
Setpoint