1. C

    Help Identifying 4-Pin Thermostat Wiring on Boiler – What Are the Other Two Terminals For?

    I’m working on connecting the resistor/heating element of my boiler, and I’m using the thermostat shown in the photo below. From what I understand, this is a 4-pin thermostat. I measured continuity with an ohm-meter and found the following: The two terminals on the left have continuity with...
  2. AverageMoss

    How to detect 24VAC as 5VDC input for microcontroller?

    Hello, I'm working on a little side project for my home thermostat. I recently bought a nest smart thermostat to replace my old "dumb" thermostat and ran into an issue with the wires. I don't have enough wires to accommodate all of the thermostat functions. Running new wiring is not an option...
  3. K

    Interpretation of Thermostat Temperature Table

    Hi, I am having trouble understanding the temperature ranges on this datasheet (attached). I'm looking specifically at the 2455R thermostat temperatures in table 1 on page 4. The thermostat is "open-on-rise" and I'm trying to find a 240 VAC 15 A rated thermostat that opens around 55 degrees...
  4. J

    Please somebody tell me what will be output watts of this PWM circuit

    Detailed description and website link are below. Parameter: 1>.Product Name: pWM 4-Wire Fan Temperature Controller 2>.Work Voltage: DC 11V~55V 3>.Work Current: 0.1A(MAX) 4>.Fan Current: 5A(MAX) 5>.PWM Range: 5%~100% or 0% 6>.PWM Frequency: 20KHz/2.5KHz 7>.PWM Signal Amplitude...
  5. J

    Connecting a thermostat cable to an electric duct heater

    Hi everyone, I am replacing a caravan propane heater which was a duct heater. I have gotten rid of gas and so now need to replace with something like this and a fan: https://www.ebay.co.uk/itm/113870595604 Only problem is that the heater does not have a connection for the thermostat like it...
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