What is BK terminal?
What is BK terminal?
What is it: The BK terminal has the ability to control blower speed based on a pulse-width modulation (PWM) signal over standard thermostat wiring.
What does BK stand for on a thermostat?
Bk wire is for dehumidification. On trane’s thermostat it will lower the fan speed by 30% when the temperature is getting closer to the set point but the humidity level has not reached the humidity set point.
What is twin on furnace control board?
When these applications arise, a simple solution may be to put in 2 furnaces and “twin” them together. This allows both furnaces to operate off of 1 thermostat and be tied into a single duct system.
What is a PWM enabled thermostat?
A PWM thermostat operates for longer or shorter on times each cycle based on the degree of error in the actual temperature. A PWM thermostat allows heat to be applied to the system even if it is overheated by less than half the differential. This is done in order to maintain the thermal momentum of the heating system.
What is EAC terminal on furnace?
EAC: Electronic Air Cleaners.
What is hum terminal on furnace?
Step 4: Connect the 24-volt wire from the humidistat to the furnace. On the control, there will be a terminal labeled HUM (humidifier) for the wire connection. Every furnace brand and model is different, but the overall procedure is similar regardless of furnace board.
What is 24V hum terminal?
The HUM terminal is a 24 VAC output, energized when the blower is operating during a call for heat. Connect an accessory 24 VAC, 0.5 amp. maximum humidifier (if used) to the ¼-in. male quick-connect HUM terminal and COM-24V screw terminal on the control board thermostat strip.
What voltage is the EAC terminal on a furnace?
Whole-home humidifier instructions show simply wiring the transformer needed for the controller into the 120V “EAC” terminals on my furnace.
What terminals do you wire a humidifier to?
Use 18-2 low voltage wire as directed in the humidistat or humidifier instructions. Everything should be labeled on the humidistat. Two terminals will connect to the humidistat and two will go to the control board.
What does EAC mean in HVAC?
Electronic Air Cleaners
EAC: Electronic Air Cleaners.
Does humidifier go on supply or return?
Proper installation One of the most common questions is where to mount it — on the return or supply side. For most types of humidifiers, it really doesn’t matter, notes Lewis. “The furnace has a negative pressure on the return air and a positive pressure on the warm air side.
