Carrier 48HC 04-28 Controls, Start-up, Operation And Troubleshooting

Also see for /50HC 04-28: Manual

Contents

Carrier 48HC 04-28 Controls, Start-up, Operation And Troubleshooting Manual pdf 78 page image

78Table 29 — Main Base Board (MBB) ConnectionsDISPLAY NAME POINT DESCRIPTION SENSOR LOCATION TYPE OF I/O CONNECTION PINNUMBERINPUTSInput power from TRAN2 control box 24 VAC J1, 1-3IGC.F IGC Fan Request gas section switch input J6, 4FDWN Fire shutdown switch supply/return/space switch input J6, 6G Thermostat G (Fan) space switch input J7, 2W2 Thermostat W2 (2nd Stage Heat) space switch input J7, 4W1 Thermostat W1 (1st Stage Heat) space switch input J7, 6Y2 Thermostat Y2 (2nd Stage Cool) space switch input J7, 8Y1 Thermostat Y1 (1st Stage Cool) space switch input J7, 10FIL.S Filter status switch indoor fan section switch input J9, 2-3HUM Humidistat switch input space switch input J9, 5-6Not Used 0-5vdc digital input J9, 7-9Not Used 0-5vdc digital input J9, 10-12SPT Space temperature (T55/56) space 10k thermistor J8, 1-2SPTO Space temperature offset (T56) space 10k thermistor J8, 2-3OAT Outdoor air temperature outdoor coil support 10k thermistor J8, 5-6SAT Supply air temperature indoor fan housing, orsupply duct 10k thermistor J8, 7-8SCT.A Saturated condenser temperature,circuit A outdoor coil, circuit A 5k thermistor J8, 9-10SCT.B Saturated condenser temperature,circuit B outdoor coil, circuit B 5k thermistor J8, 11-12RAT Return AirTemperature Return 10k thermistor J8, 13-14FAN.S Fan statusswitch indoor fan section switch input J8, 15-16SSP.A Suction pressure, circuit A compressor A suction pipe 0-5 VDC pressuretransducer J8, 18-20SSP.B Suction pressure, circuit B compressor B suction pipe 0-5 VDC pressuretransducer J8, 21-23Not Used 0-5 VDC J8, 24-26OUTPUTSCRC Cooling Reheat Control relay J10, 3RH2.A Reheat 2 Valve Circuit A relay J10, 6RH2.B Reheat 2 Valve circuit B relay J10, 9IDF.1 Indoor fan relay 1 relay J10, 11IDF.2 Indoor Fan relay 2 relay J10, 13IDF.3 Indoor Fan relay 3 relay J10, 16ALRM Alarm relay relay J10, 19COMP.B Compressor B1 relay relay J10, 21COMP.A Compressor A1 relay relay J10, 23HT.1 Heat Stage 2 relay relay J10, 25HT.2 Heat Stage 1 relay relay J10, 27COMMUNICATIONLocal Equipment Network (LEN) communication J5, 1-3Carrier Comfort Network (CCN) communication J5, 5-7Network device power 24 VAC J5, 9-10Scrolling Marquee Display (LEN) communication J4, 1-3Scrolling Marquee Display power 24 VAC J4, 5-6Expansion LEN Bus communication J3, 1-3Optional ECB power 24 VAC J2, 1-2