DOE-2 Reference Manual Version 2.1 - DOE2.com

For multi zone and dual-duct systems, additional energy saving can beaccomplished by resetting hot deck temperature downward until the coldestzone can be satisfied without addition of cooling. To simulate this, thekeyword data entry HEAT-CONTROL; COLDEST is added to the SYSTEMinstructions input.Case 8PROPORTIONAL Heating/Cooling, Controlled in Sequence (nodeadband) from Single Set Point with Seasonal Temperature Resetand Off-Hour Temperature OffsetFigure IV.14 depicts this mode of operation, which is the same asthat for Case 7, except that off-hour temperature offset has been added(generally by a time clock-actuated day/night thermostat arrangement).The input data is the same except that the schedule instructions referencedby HEAT-TEMP-SCH and COOL-TEMP-SCH must be expanded to show offhourtemperature offset. As for Case 7, cooling and heating set pointsmust be separated by exactly one throttling range (2°F) during all timeperiods, to avoid simulating either a deadband that does not exist orreduced proportional band.The following is an example of temperature set point data input forthis case.H-SCHS ; SCHEDULETHRU MAY 15(MON,FRI)(1,S)(59)(9,18)(67)(19,24)(59)(WEH)(1,24)(59)THRU NOV 15(MON,FRI)(1,8)(84)(9,18)(77)(19,24)(84)(WEH)( 1,24) (S4)THRU DEC 31(MON,FRI)(1,8)(59)(9,18)(67)(19,24)(59)(WEH)(1,24)(59) ..6570 75 85Zone TelrlperatureOFFig. IV.14.PROPORTIONAL heating/cooling, controlled in sequence (nodeadband) from single setpoint with seasonal temperaturereset and off-hour temperature offset.IV.173 (Revised 5/81)