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A couple of questions re new build and heating requirement Should I have all the info I require to size my central heating requirement from a new house SAP calculation information? The house, having five bath / en-suite rooms plus the rest will require a big DHW tank, because of this I would...

Thanks colzey

I have a 60s bungalow with cracks in the ceilings caused by all sorts of issues that I have resolved so I intend overboarding the existing plasterboard with new. Am I alright using 12mm boards where the board edges will be resting to the existing boards that are not to nailed to noggins or...

Hello members, I need advice on the following please. I have just updated my existing UFH circuit with Heatmiser wiring centre and slimline PRTs and wondering where I should install the O/H stat in this circuit. I was thinking that the o/h stat should interrupt the PRTs stats to zone valve...

Thanks Dan, I am doing what you advised during my last thread about actuators etc and ripping the old out replacing with new Paul

A quick question about the above wiring centre, I have just bought it to upgrade my system and I am stumbling on the first hurdle "how do you get into it!" I don't want to damage it but the literature with it goes straight into wiring. Thanks for any info Paul

The Man boiler is using a low temp output and the system also has a Reliance blending valve but I will fit the overheat thermostat as you state. Thanks for the interest Paul ps, in the event of a problem with this boiler (28kw htg 36kw DHW) what would be a good alternative to replace it with and...

Dan, The Eco manifold wiring diagram that I posted was the "norm" back in the year 2000 when I installed the UH system, I can see the benefits of today's wiring centres but my system has been trouble free over that time so there has been no need to upgrade. The water system has all the features...

Dan, The manifold wiring diagram supplied by "Eco" was what I used to build up my drg as e-mail (don't ask why the pipe stat is where it is shown on the drg I haven't an answer but it's been there years) What I intend doing is to place one wire of the o/heat stat with the orange wire of the zone...

Dan, the system was supplied by "eco-hometec (Doncaster)see drg. attached

The problem wasn't the CM67 as this was not calling for heat (showing no volts on my meter in the junction box) There are three master actuators (four wire Honeywell Z 100) and individually checking each one I found one "live" sending power to the Zone valve, pump and boiler. (I presume the...

Looking for a bit of advice, forum members, I have a 10 zone underfloor heating system and had a problem yesterday when a faulty zone actuator left the heating system working when the CM67 programmer was not calling for heat. I want to fit the above thermostat (which I have) in the system so...

Please advise, My neighbour has a tee off his kitchen sink cold water supply that feeds a filtered water unit and he says that occasionally there is vibration on the pipe for no obvious reason, ie, the hot or cold water supply has not been used immediately before, during or after this occurs...

Thanks boilererman 2 for your response, I was given the cost for this item by the service eng. so I e-mailed MHG for the price and their response is that the actuator is now only supplied with the valve attached hence the price £390 to pay + delivery. I am now back on the trail of repairing...

A question on replacement motors, I have a diver-tor valve in a Mann gas central heating boiler (supplied by Eco homtec in 2001) and it is powered by a synchronous motor similar to the Honeywell 4043H valve motor, the difference between the two being the longer length of the gear wheel shaft of...

Thanks Dan, Don't ask why I didn't look at the wiring diagram for zone valve control because I don't know what I looked at but obviously not that. Both zones are now working from the two stats. Just waiting for the plumber to fit the boiler for my neighbor Thanks again Paul

Please advise on the following, While I am waiting for the plumber to change the boiler I require pointing in the right direction with the CM 900 wireless relay box. I have powered the relay box L & N to mains and have it responding to the 927 stat heat demand (stat to relay) I have then...

I have always used Honeywell hardwired controls in the past and found them reliable and long lasting but using the wireless components makes it easier than chasing out plaster and running cables through rooms, providing there are no issues with "control and reliability" They are not cheap to...

Thanks Picasso its straight forward looking at the drg. The power supply to the controls are through LS with LR the switched live thus no other supply is needed apart from the supply to the boiler if i read your drg. correct. Do you have any experience of the Honeywell wireless stats /...

We are upgrading a heating system from a single circuit to a "two zoned" circuit and instead of chasing out plaster to hardwire thermostats I was thinking of using the Honeywell CM927 wireless programmable thermostats controlling each of the circuit zone valves A "gas safe" plumber is...