Honeywell two port valve

ColinK1 · 28 Sep 2014

Hello,
Wondered if anyone could help me? Firstly wondered if these come naturally open or closed or do you just turn them around? I would like to use zone valves to switch over from one feed pipe to another. Was going to use a thermostat to send power to them so wondered which wire fires up the motor and closes/opens the valve? Presume the blue is neg and yellow/green earth.
Sorry if I am a bit vague I am a HETAS engineer and most of my stuff comes pre wired.
Cheers. Colin.

45yearsagasman · 28 Sep 2014

The brown wire powers the motor, grey is perm live and the Orange switches on the boiler, pump, or whatever is connected.

1983 · 28 Sep 2014

Hi Colin.
Brown is the live to the motor.
Orange and grey are connected to an end switch for boiler/pump switch live.
So it would be call power to common on thermostat then call from thermostat to brown on zone valve.
They are closed when not powered by springs.

stardanny · 28 Sep 2014

Honeywell zone valve normally close when not powered up.

You can get zone valve normally open when not powered up as well.

Daniel.

vulcancontinental · 28 Sep 2014

stardanny said:
Honeywell zone valve normally close when not powered up.

You can get zone valve normally open when not powered up as well.

Daniel.

Yes but they were very hard to source. Can't remember the number.

stardanny · 28 Sep 2014

vulcancontinental said:
Yes but they were very hard to source. Can't remember the number.

V4043B1257 22mm port
V4043B1265 28mm port

Daniel.

Steelmasons · 28 Sep 2014

What application are you using them for? , only suitable for closed systems or low head.

ColinK1 · 28 Sep 2014

Hello
Ah I may be in trouble here I wanted to put it in line to stop the flow from a combi domestic hot water side to the taps to stop it running when it feeds from the domestic cylinder (heated by my solod fuel stove) so it would be stopping mains water pressure I guess? Am I in trouble here? So basically I will be asking it to spring against what 3 bar or so. Help. Cheers. Col

Dan Robinson · 28 Sep 2014

What type of cylinder are you talking about?

ColinK1 · 28 Sep 2014

Ok the plan is to have the house connected up to and served by the combi.

Multi fuel stove connected to the old vented cylinder with a decent heat sink rad circuit connected also.

Thermostat on the cylinder that when it gets to a certain temperature opens a valve from the domestic take off and closes the one into the system from the combi domestic h/w so when a tap is opened there is no drop in pressure and it does not fire up.

When the thermostat is at a lower temperature things stay with the combi.

Fitting a dumble valve on the feed from the gravity h/w take off also as a fail safe to stop any pressure going backwards to the old vented side.

Is my logic ok or am I in cloud cookoo?

Cheers. Col.

Dan Robinson · 28 Sep 2014

It makes no sense at all.

flameport · 29 Sep 2014

This simply will not work. Zone valves will not hold back mains pressure.

Even if they did, the plan is total madness and could easily lead to the cylinder being subjected to mains pressure.

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Honeywell two port valve

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