Carrier 50TCQA04 Installation Instructions Manual

Also see for WeatherMaker 50TCQA07: Installation instructions Installation instructions Service and maintenance instructions

22C14266Fig. 32 -- Defrost Control Board LocationTable 5 – 50TCQ Defrost Board I/O and Jumper ConfigurationsInputsPoint Name Type of I/O Connection Pin Number Unit Connection NoteG Fan DI, 24Vac P2--- 3 CTB--- GY1 Cool 1 DI, 24Vac P2--- 5 CTB--- Y1Y2 Cool 2 DI, 24Vac P2--- 4 CTB--- Y2W1 Heat 1 DI, 24Vac P2--- 7 CTB--- W1W2 Heat 2 DI, 24Vac P2--- 6 CTB--- W2R Power 24Vac P3--- 1 CONTL BRD--- 8C Common 24Vac P3--- 2 CONTL BRD--- 4DFT1 DI, 24Vac DFT--- 1 to DFT--- 1 —DFT 2 DI, 24Vac DFT--- 2 to DFT--- 2 —OutputsPoint Name Type of I/O Connection Pin Number Unit Connection NoteIFO Fan On DO, 24Vac P3--- 9 REHEAT/HP--- 2OF OD Fan On DO, 24Vac OF OFRRVS1 DO, 24Vac P3--- 7 to P3--- 5 — Energize in COOLRVS2 DO, 24Vac P3--- 6 to P3--- 4 — Energize in COOLCOMP 1 DO, 24Vac P3--- 10 FPT1 --- REHEAT/HP--- 6COMP 2 DO, 24Vac P3--- 8 FPT2 --- REHEAT/HP--- 8HEAT 2 DO, 24Vac E--- HEAT TB4--- 1COM 24Vac P3--- 3 TB4--- 3ConfigurationPoint Name Type of I/O Connection Pin Number Unit Connection NoteSelect Jumper 24Vac P1--- 1 —2 Compressor 24Vac P1--- 3 — Use for 50TCQDSpeed--Up ConfigurationPoint Name Type of I/O Connection Pin Number Unit Connection NoteSpeed --- Up Jumper — JMP17 —Speed --- Up Jumper — JMP18 —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 ofDIP switches SW1 and SW2 (i.e. 90 minutes will be reduced to 9 seconds).Jumper for 5--- 20 seconds: Forced Defrost — Defrost runs for 30 seconds if DFT2 is open.Auxiliary (Electric) Heat control — The 50TCQ unit canbe equipped with one or two auxiliary electric heaters, toprovide a second stage of heating. The DFB will energizethis Heating System for a Stage 2 Heating Command(heaters operate concurrently with compressor(s) in the Stage1 Heating cycle), for an Emergency Heating sequence(compressors are off and only the electric heaters areenergized) and also during the Defrost cycle (to eliminate a“cold blow” condition in the space).Defrost — The defrost control mode is a time/temperaturesequence. There are two time components: The continuousrun period and the test/defrost cycle period. The temperaturecomponent is provided by Defrost Thermostat 1 and 2(DFT1 and DFT2) mounted on the outdoor coil.