DOE-2 Reference Manual Version 2.1 - DOE2.com

4)COOLING-CAPACITY at low speedCOOLING-CAPACITY at high speedIf values are not specified, the default values will be 1.,1., 1., 1., which means either COMPRESSOR-TYPE = SINGLE-SPEEDor FAN-CONTROL = CONSTANT-VOLUME (or in other words,one-speed).NIGHT-CYCLE-CTRL Input for this keyword is the code-word that specifies thebehavior of the system fans when the FAN-SCHEDULE is "off".The fans are "off" when the hourly values in the SCHEDULEthat is referenced by FAN-SCHEDULE are equal to 0 (if thehourly SCHEDULE values are positive, the fans are already"on" and if the hourly SCHEDULE values are negative, the fansare not permitted to be "on"). If the user specifies hourlySCHEDULE values of 0 and -1, it is possible to impart on-offscheduling to the NIGHT-CYCLE-CTRL option. NIGHT-CYCLE-CTRLis appropriate to all systems except the Floor Panel HeatingSystem (FPH) and the Residential System (RESYS).FAN-EIR-FPLRNIGHT-CYCLE-CTRL only affects the fan operation. Once thefans have cycled on, the availability of heating or coolingis controlled by the HEATING SCHEDULE and COOLING-SCHEDULE.The acceptable code-words are:STAY-OFF which indicates that regardless of conditions, thefans are to stay off (default value).CYCLE-ON-ANY means that if the temperature in any ZONE in theSYSTEM falls below the THROTTLING-RANGE for heating, the fansare cycled on for that hour.CYCLE-ON-FIRST indicates that if the temperature in the first,or control, ZONE in the SYSTEM falls below the THROTTLING-RANGEfor heating, the fans are cycled on for that hour.For UVT, the outside air dampers are closed during thecycle-on period.accepts the U-name of a linear, quadratic, or cubic equationthat defines the ratio of electric energy input to thefan to the full load electric input to the f~n, as a functionof part-load ratio. The equation is input in a CURVE-FITinstruction and given a U-name. That U-name is specified asa value for this keyword to call the equation. However, notethat FAN-EIR-FPLR is also a code-word under FAN-CONTROL. Toobtain this control strategy 1) a U-named equation must beinput in a CURVE-FIT instruction. 2) that U-name must bespecified for this keyword, and 3) FAN-CONTROL must bespecified as code-word FAN-EIR-FPLR.I V. 228 (Revised 5/81)