That's funny, I was just thinking that myself.
Range do say the immersion isn't designed for continuous use though, but maybe if it's fitted with a timer that would be OK?
Help with Vaillant Controls Needed
- Thread starter RoyMacDonald
- Start date
That's funny, I was just thinking that myself.
Range do say the immersion isn't designed for continuous use though, but maybe if it's fitted with a timer that would be OK?
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A
ALEC1
The immersion will have a thermostat... why they say that I have no idea...
Exactly. If I want to go that route I'd better ring their tech department I guess. Goes against the grain a bit not to use the gas boiler though.
I spoke to Vaillant about using a 3 zone valve and they say that it won't be able to transmit more than 20 Kw and I'm using a 37 Kw boiler, but that a switching relay to convert the two signals to one signal will work using the VR65 / 470f.
So still looking for advice on the relay.
So still looking for advice on the relay.
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It's just a relay, any competent heating technician or electrician would be able to pick a suitable one from a catalogue. There are dozens of different coil voltages and contact ratings in electrical catalogues (TLC, Maplin, RadioSpares, etc.) .
I'd use a DIN rail mounted one and put it in an adaptable box enclosure with some DIN rail terminals and some cable glands; it's the OCD.
There is a relay in the VR65, I believe, but it's contacts are not rated to operate two 2-port valves simultaneously. It may work, the danger is that you will burn out the relay and wreck the VR65.
You shouldn't use a 3-port valve with an unvented water heater; the hot water port is usually open when the power is off, so the cylinder could overheat in the event of a partial power failure.
A
ALEC1
this is correct, but the cylinder coil ratings will only be about 16 kws each.
You can range rate the boiler down for hot water if you use vaillants controls, such as the vr 65
I have several VR65s with with the heating terminals controlling two two port valves... when I first did this I got some figures saying that as the valves pull so little it would be fine...and indeed it is!
A
ALEC1
two port valves pull 6 watts... very few amps so the VR65 will almost certainly cope with a couple of two ports!
The manual says it can only cope with one.
A
ALEC1
there is lots to be said for doing things the way vaillant expect, that's true...but sometimes needs must as they say which is why I know about this.
The issue really is that the manufacturers dont promote "system design" for their products, if they had may be the OP would have got a more coherent system design!
The issue really is that the manufacturers dont promote "system design" for their products, if they had may be the OP would have got a more coherent system design!
Don't do work over Tenterden way do you?
A
ALEC1
fraid not... I am in North london
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