Daikin Magnitude, Инструкция по установке, эксплуатации и обслуживанию, Страница: 50 / 70

IOM 1210-7 • MAGNITUDE
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MODEL WMC CHILLERS 48 www.DaikinApplied.com
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WATER Setpoints
Figure 49: WATER Setpoint Screen
Table 17: WATER Setpoint Settings
Description Default Range Password Comments
Maximum Reset Delta T
0.0°F 0.0 to 20.0 °F M Set the maximum reset that can occur, in degrees F if LWT reset is selected or max
reset at 20 mA input if 4-20 mA is selected in SP7
Start Reset Delta T 10.0°F 0.0 to 20.0 °F M Sets the evap delta-T above which Return reset begins
LWT Reset Type [SP7]
NONE NONE, RETURN,
4-20mA
M Select reset type, NONE for none, RETURN for resetting chilled water based on
the entering water, or 4-20 mA for external analog signal
Templifier Source Reset:
55°F 50 to 100°F M Sets maximum Delta T allowed between active LWT SP and evaporator LWT.
Active LWT SP is lowered as necessary to prevent exceeding this value.
Templifier Source No Start: 70°F 30 to 100°F M Entering evaporator water temp below which Templifier will not start.
Stage Delta T
1.0 0.5 to 5°F M Sets the temperature the leaving water must be above setpoint for next
compressor to start
Startup Delta T 3.0°F 0.0 to 10.0 °F M Degrees above setpoint for chiller to start
Shutdown Delta T 3.0°F 0.0 to 3.0 °F M Degrees below setpoint for chiller to stop
Leaving Water Temp - Cool 44.0°F 35.0 to 80.0 °F M Evaporator LWT setpoint in COOL mode
Leaving Water Temp - Heat 135.0°F 110 to 135°F M Condenser LWT setpoint in HEAT mode
Leaving Water Temperature (LWT) Reset
The Active Leaving Water variable shall be set to the current
Leaving Water Temperature (LWT) setpoint unless modified
by one of the reset methods below. (The current LWT setpoint
is Cool LWT as determined by the chiller mode.) The type of
reset in effect is determined by the LWT Reset Type setpoint
(Setpoint 7 of the WATER Setpoint Screen). It is important to
note that all reset functions are designed with a filter to prevent
chiller shutdown in the case of a sudden delta change.
Reset Type – NONE
The Active Leaving Water variable is set equal to the current
LWT setpoint, determined by the Unit mode.
Reset Type – RETURN (Cool Mode)
The Active Leaving Water variable is adjusted by the return
water temperature.
When the chiller mode = COOL, the Active Leaving Water
variable is reset using the following parameters: