Carrier WeatherMaker 50TCQ07 Installation Instructions Manual

Also see for WeatherMaker 50TCQ*07: Product data

21NOTES:1. Jumper for 1-3 seconds: Factory Test — The defrost interval timing is reduced by a factor of 0.1 seconds/minute based on the positions of DIPswitches SW1 and SW2 (i.e. 90 minutes will be reduced to 9 seconds).2. Jumper for 5-20 seconds: Forced Defrost — Defrost runs for 30 seconds if DFT2 is open.AUXILIARY (ELECTRIC) HEAT CONTROLThe 50TCQ unit can be equipped with one or two auxiliaryelectric heaters, to provide a second stage of heating. The DFBwill energize this Heating System for a Stage 2 Heating Com-mand (heaters operate concurrently with compressor(s) in theStage 1 Heating cycle), for an Emergency Heating sequence(compressors are off and only the electric heaters are ener-gized) and also during the Defrost cycle (to eliminate a “coldblow” condition in the space).DEFROSTThe defrost control mode is a time/temperature sequence.There are two time components: The continuous run periodand the test/defrost cycle period. The temperature componentis provided by Defrost Thermostat 1 and 2 (DFT1 and DFT2)mounted on the outdoor coil.The continuous run period is a fixed time period between theend of the last defrost cycle (or start of the current Heating cy-cle) during which no defrost will be permitted. This period canbe set at 30, 60, 90 or 120 minutes by changing the positions ofDIP switches SW1 and SW2 (see Fig. 35 and Table 7). The de-fault run period is 30 minutes.Shorting the jumpers for a period of 5 to 20 seconds bypassesthe remaining continuous run period and places the unit in aForced Defrost mode. If the controlling DFT is closed whenthis mode is initiated, the unit will complete a normal defrostperiod that will terminate when the controlling DFT opens orthe 10 minute defrost cycle limit is reached. If the controllingDFT is open when this mode is initiated, the Defrost cycle willrun for 30 seconds. Both modes end at the end of the Defrostcycle.Fig. 35 — DIP Switch Settings - Defrost BoardElectric Heaters50TCQ units may be equipped with field-installed accessoryelectric heaters. The heaters are modular in design, with heaterframes holding open coil resistance wires strung through ce-ramic insulators, line-break limit switches and a control con-tactor. One or two heater modules may be used in a unit.Heater modules are installed in the compartment below the in-door (supply) fan outlet. Access is through the indoor accesspanel. Heater modules slide into the compartment on tracksalong the bottom of the heater opening. See Fig. 36-38.Table 6 — 50TCQ Defrost Board I/O and Jumper ConfigurationsPOINT NAME TYPE OF I/O CONNECTION PIN NUMBER UNIT CONNECTION NOTEINPUTSG Fan DI, 24 vac P2-3 CTB-GY1 Cool 1 DI, 24 vac P2-5 CTB-Y1Y2 Cool 2 DI, 24 vac P2-4 CTB-Y2W1 Heat 1 DI, 24 vac P2-7 CTB-W1W2 Heat 2 DI, 24 vac P2-6 CTB-W2R Power 24 vac P3-1 CONTL BRD-8C Common 24 vac P3-2 CONTL BRD-4DFT 1 DI, 24 vac DFT-1 to DFT-1 —DFT 2 DI, 24 vac DFT-2 to DFT-2 —OUTPUTSIFO Fan On DO, 24 vac P3-9 REHEAT/HP-2OF OD Fan On DO, 24 vac OF OFRRVS1 DO, 24 vac P3-7 to P3-5 — Energize in COOLRVS2 DO, 24 vac P3-6 to P3-4 — Energize in COOLCOMP 1 DO, 24 vac P3-10 FPT1-REHEAT/HP-6COMP2 DO, 24 vac P3-8 FPT2-REHEAT/HP-8HEAT 2 DO, 24 vac E-HEAT TB4-1COM 24 vac P3-3 TB4-3CONFIGURATIONSelect Jumper 24 vac P1-1 —2 Compressor 24 vac P1-3 — Use for 50TCQDSPEED-UP CONFIGURATIONSpeed-Up Jumper — JMP17 —Speed-Up Jumper — JMP18 —Table 7 — DIP Switch Positions1 2 1 2 1 2 1 2 31  1  1 1   1  On0  0  0   0 0 Off30 minutes(factory default) 60 minutes 90 minutes 120 minutes Fan Delay