DOE-2 Reference Manual Version 2.1 - DOE2.com

RATED-HEIR-FCFM *ELEC-HEAT-CAPMIN-HP-TMAX-ELEC-TDEFROST-TDEFROST-DEGRADE *variable) as a function of supply air flow rate/rated cfm(independent variable). The linear, quadratic, or cubicequation must be input to the program and U-named in aCURVE-FIT instruction. The equation should be normalizedso that at RATED-CFM its value is 1.0.is the U-name of a linear, quadratic, or cubic equationthat describes the rated Electric Input Ratio for heating(dependent variable) as a function of supply air flowrate/rated cfm (independent variable). The bi-linear orbi-quadratic equation must be input to the program andU-named in a CURVE-FIT instruction. The equation shouldbe normalized so that at RATED-CFM its value is 1.0.is the design total heat capacity of the auxiliary electricresistance heater within the heat pump. Note that inputfor this keyword must be a negative value to avoid an ERROR.is the outdoor dry-bulb temperature below which the heatpump turns off.is the maximum outdoor dry-bulb temperature above whichthe electric resistance heating is turned off. Thiskeyword is appropriate only to RESYS or PTAC whereHEAT-SOURCE = HEAT-PUMP.is the outdoor temperature below which the heat pumpdefrosts itself (during its heating mode of operation).This keyword is appropriate only to RESYS and PTACsystems, assuming they are equipped with a heat pump.is the U-name of a linear, quadratic, or cubic equationthat describes the ratio of defrost time to heating-ontime (dependent variable) as a function of outdoorwet-bulb temperature and outdoor dry-bulb temperature(independent variables). If the user wishes anythingother than the default, a linear, quadratic, or cubicequation must be input to the program and U-named in aCURVE-FIT instruction. This keyword is appropriate onlyto RESYS and PTAC systems, assuming they are equipped witha heat pump. The default, which is optional, is 3 minutesof defrost time for each 90 minutes of operation if theoutdoor dry-bulb temperature is less than DEFROST-T.HCOIL-WIPE-FCFM applies only to MZS, DDS, and PMZS systems. When somedual duct systems are in the predominately cooling mode,some of the supply air passes over, or wipes, the main hotdeck before entering the cold deck (or mixing box). Thisis caused by the location of the heating coil in the unit.This keyword is used to account for the effect of partially*Input for this keyword should be made only if the user is not satisfiedwith the default values built into the program. Additionally, if theuser decides to specify a U-name, it should not be one of the reserved"Default Curve U-names" in Table IV.39. Furthermore, these U-names areapplicable only to the SYSTEM-TYPEs stated in the table.IV.251 (Revised 5/81)