Hi everyone,
I have a customer who needs a new system boiler, currently has a 22kw which I've roughly calculated as enough heat output for the heating (its a 6 bed victorian terrace house), but this doesn't take the 200l unvented cylinder demand into account. Currently the system is setup on S plan, with no priority domestic hot water. When I fit the new boiler, I would like to try and set it up with PDHW for obvious reasons, but I'm not sure if this is possible with the existing two x 2 port valves (both normally closed).
I know PDHW is a hot topic at the mo, but I've not delved into it as yet (mostly combis in my area). I've found a wiring diagram for W plan using a three port (2 position) valve, but can't find any wiring diagram for a two x 2 port valve arrangement. I've found a little info on X plan, but again, not much info out there and it looks like it's something to do with Intergas boilers. I will be fitting a Vaillant on this particular job.
If any of you guys can point me in the right direction that would be great.
Thanks, Lee.
Continue reading...
I have a customer who needs a new system boiler, currently has a 22kw which I've roughly calculated as enough heat output for the heating (its a 6 bed victorian terrace house), but this doesn't take the 200l unvented cylinder demand into account. Currently the system is setup on S plan, with no priority domestic hot water. When I fit the new boiler, I would like to try and set it up with PDHW for obvious reasons, but I'm not sure if this is possible with the existing two x 2 port valves (both normally closed).
I know PDHW is a hot topic at the mo, but I've not delved into it as yet (mostly combis in my area). I've found a wiring diagram for W plan using a three port (2 position) valve, but can't find any wiring diagram for a two x 2 port valve arrangement. I've found a little info on X plan, but again, not much info out there and it looks like it's something to do with Intergas boilers. I will be fitting a Vaillant on this particular job.
If any of you guys can point me in the right direction that would be great.
Thanks, Lee.
Continue reading...
