3 Wire Thermostat Wiring Diagram For A Boiler. The boiler only operates if both the programmer and thermostat are on. This is the same switching arrangement however here a 3 wire thermostat is used which requires a neutral connection.
Diagrams are available for all Warmup Thermostats whether you are installing it as part of a hydronic underfloor heating system a simple combination boiler configuration or even a multi-zoned. Wiring Application Guide. If your current thermostat only has 2 wires present your furnaceboiler has TT or R and W contacts and youre not able to wire into your existing transformerdont have a C terminal you can install the FAST-STAT Common Maker as well as an external 24V transformer.
We include wiring diagrams and installation instructions for most zone valve model and Priority Operation.
Now loop each copper end around each terminal and tighten the screw on the terminal. In this scenario the Power Extender Kit PEK is not compatible. It reveals the elements of the circuit as streamlined forms and also the power and also signal connections between the devices. The thermostat to the boiler or pass through a junction box If theres a combi boiler with no junction box the Heat Link will be.