How do I wire cylinder thermostat to a central heating pump?

[fridgefreezer]

How do I wire a cylinder thermostat to a central heating pump?
I have an HTS3 cylinder thermostat that I want to use to turn on an off a Wilo Gold RS50 pump.

This is part of a very simple system I have created in a garage. I am heating the water in the tank separately from any boiler or the like, and that's not the issue.

I am not trying to use the stat to control the heat, or the method I use to get heat, I am trying to control a pump.

When the water in the tank reaches 50 degrees, I want the pump to circulate the water out of the tank and into a single radiator and back again.

Simple.

The HTS3 stat has three connectors in it. One is 'common, one is '1' - call for heat, and the other is '2' - satisfied.

The pump has three connectors too - live, negative and earth.

THE QUESTION:!!!
How do I wire the stat to the pump? I will have cable coming from 240v mains supply - -three wires, live, negative and earth.

Many thanks.

ps, sorry if this should have gone in the electricians forum, I wasn't sure where it should go.

 

[ChrisR]

live, negative and earth

It's called "Neutral"!

Live to common, call for heat to pump live.

Maybe you should get someone more faliliar with electrics to help?

 

[fridgefreezer]

Sorry, yes, neutral.

So if the live goes to the common terminal, I then run a wire from 'call for heat' to the live on the pump?

So, the neutral wire from the mains - does that just go straight to the neutral on the pump?

Same with earth? Straight to the earth on the pump?

I do have some help, but that's not until tonight, and I would like some info before hand.

Many thanks

 

[fridgefreezer]

I've wired the stat to the pump as descibed, but what I can't understand is why, when I plug in the power that that the pumps is activated.

The stat is set to 50 degrees. When I turn it down to just about zero, the pumps stops.

What I want to happen though, is for the pump NOT to run until the indicated temperature is reached.

Could I achieve this by wiring the pump to the 'Satisfied' terminal on the stat instead of the 'Call for Heat' terminal?

Thank you.

 

[seco services]

change the wiring as you said from calling to satisfied.

 

[fridgefreezer]

Yes, thank you, that seems to have done the trick!

Brilliant, many thanks, so simple after all.