DOE-2 Reference Manual Version 2.1 - DOE2.com

9. SYSTEM-TERMINALThe function of the SYSTEM-TERMINAL instruction is to provide informationon the characteristics of heat transfer, flow throttling, or air inductioncomponents that control individual zone temperatures. Several SYSTEM-TERMINALinstructions may be required if the facility is served by more than one typeof system and/or it is desired to conduct parametric runs. These parametersare the same for all zones served by the system.SYSTEM-TERMINAL is a "subcommand" of SYSTEM and, as such, can be used toinput a subset of data to SYSTEM.An alternative mode for data entry is to complete and enterSYSTEM-TERMINAL keywords and their values directly into the SYSTEM command (ifthis approach is chosen, omit the SYSTEM-TERMINAL keyword in SYSTEM).The user is cautioned that at the present time, the values ofREHEAr=DE~T-and INDUCT I oNJRATIO must be ldentTCaT for all zones served bythe system. MIN-CFM-RATIO can be supplied separately at the zone level also.SYSTEM-TERMINALREHEAT-DELTA-TINDUCTION-RATIOMIN-CFM-RATIOinforms the SDL Processor that the data to follow arerelated to zone temperature control components, such asreheat coils, induction units and VAV boxes. A uniqueuser-defined name must be entered in the U-name field ofeach SYSTEM-TERMINAL instruction. Omission of this entryin the "subcommand" wi 11 cause an error.is the maximum increase in temperature for supply airpassing through the zone (or subzone) reheat coils. Thevalue specified here applies to all zones in the system.is the ratio of induced air flow to primary air flow.This entry is applicable to the fixed-ratio inductionunits (system types TPIU and FPIU), but not to thevariable-ratio ceiling induction units used for subzonetemperature control (System type SZCI), which has apreprogrammed value of 1.0. The value input here appliesto all zones in the system.is the minimum allowable supply air flow rate, expressedas a decimal fraction of design flow rate. The keywordMIN-CFM-RATIO is applicable only to variable-volume typesystems. (This keyword appears also under the ZONEcommand. The value specified here in the SYSTEM-TERMINALcommand applies to all zones in the system that do nothave an overriding specification at the zone level in theZONE command.)If MIN-CFM-RATIO is less than MIN-OUTS IDE-AIR, 100 percent outside ventilation air flow will be simulated belowMIN-OUTSIDE-AIR flow.IV.231 (Revised 5/81)