Data Aire dap4 User Manual page 49

MENU J – FACTORY SETTINGS (factory level) continued
Wtr Vlv: The selection of the water valve function. Choices are:
None –
No water valve used. (This is the default selection)
Chill Wtr Cool – Uses chilled water to perform all cooling, without DX. The
return air is used for temperature control.
Engy Svg Cool – Uses chilled water to cool (if it is cold enough) before
requiring compressors to run.
Aux Chill Wtr – Same energy saving as above but the chilled water source
is independent from DX condensing circuit therefore the condenser / heat
exchanger contact will not energize.
Chill Wtr Reg -
discharge air is used for temperature control. Therefore, a discharge air
temperature sensor is required.
E-Saver Assist: (Only displayed in Engy Svg Cool or Aux Chill Wtr mode). The
number of compressors that may assist chilled water cooling. Choices are: None,
1, 2 or 4 compressors. A discharge temperature sensor is required.
Wtr Vlv Voltage: The signal voltage used for the installed water valve. Choices
are: 0-10, 2-10, 7-10, 6-9 and 4-7 volts.
E/S Startup Time:
to 300 seconds. The default is 0, which disables this function.
Wtr Vlv Action: The signal voltage can be Direct (default) which modulates up
with increased demand or Reversed to modulate down with increased demand, to
be compatible with a normally open valve.
Engy Lockout Time: (Only displayed in Engy Svg Cool or Aux Chill Wtr mode).
The minimum time that energy saver will be disabled, E/S will not be restarted until
DX cooling ends. Range of time is 15 (default), 30, 45 and 60 minutes.
Switch to DX: (Only displayed in Engy Svg Cool or Aux Chill Wtr mode). Forces
DX into operation when only CW cooling has run past this setting. Range of
adjustment is from 0 to 9999hours. The default is 0, which disables this function.
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Uses chilled water to perform cooling, without DX. The
Allows flow of CW before detecting its temperature. Range is 0
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