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Wtr Vlv: The selection of the water valve function. Choices are:
None – No chilled water valve used. (This is the default selection) Chill
Wtr Cool – Uses chilled water to perform all cooling, without DX. Engy
Svg Cool – Uses chilled water to cool (if it is cold enough) before
requiring compressors to assist.
Aux Chill Wtr – Same energy saving as above but the chilled water source
is independent from DX condensing circuit; therefore, auxiliary condenser
contact (DO8) will not energize.
Chill Wtr Reg – Like the Chill Wtr Cool, it uses chilled water to perform all
cooling. However, the discharge air is used for temperature control, so a
discharge air temperature sensor is required. (Note: discharge air is used
regardless of the “Control Temp” setting).
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.
Note: Selections below are only displayed in Engy Svg or Aux Chill Wtr modes.
E/S Assist: The number of compressors that may assist chilled water cooling
when in the E/S Available mode. Choices are: None, 1, 2 or 4 compressors. A
discharge temperature sensor is required. Note: All compressors may run when
not in the E/S Available mode.
E/S Startup Time: Allows flow of CW before causing a high temperature lockout in
energy saver modes. Range is 0 (default) to 300 seconds.
E/S Lockout Time: This is the time that energy saver will be disabled due to high
water temperature or E/S Changeover due to high air temperature. Range of time
is 1 to 60 minutes with a default of 15mins.
E/S Changeover: This feature locks out CW energy saver and switches totally to
DX cooling if the air temperature reaches setpoint + deadband + this setting. Once
locked out and the E/S Lockout timer has expired, temp must drop back to setpoint
for CW cooling to resume. Range is from “None” or 1 to 10 degrees with default of
2. When set to “None”, the energy saver will continue to run along with E/S assist
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