Biasi 24s - Boiler fires and runs on C/H when controls are not asking for heat, timer is off, room stat is off, just power to boiler,seems to be cotrolled by Hot water potentiometer.
Boiler fires and runs on C/H when controls are not asking for heat, timeclock is off, roomstat is off, just power to boiler. when running appears to be only controlled by hot water potentiometer setting.
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Sounds like a lot of unknowns from your article. Here are some basic checks
- if they are the honeywell zone valves and you try to open them and get resistance than 9/10 times the t-stat is not calling for heat and the valve should be closed
-if stat is calling and wants heat zone valve lever should be free of resistance when moving it
- 15-20 psi is a little high but could be normal based on the size of your place and the temperature you are reading these pressures at
-with the pumps always running seems to me that the pumps are hard wired to a constant electrical source, if you want optimal control install a taco zone controller
This is both a complex and dangerous system. There are many factors which can cause this. I will need more information. I will ask some basic questions... Was the thermostat changed out with the a/c unit or does it have a separate one? Did the gas valve get shut off? Did the breaker get shut off? Is the water on? They have low water lockouts. 99% of the time, it is where work was done. Did they hook up the stat correctly and establish the proper type of heat on the stat? Is the circulation pump on? Is the flame control board reset tripped? Leave feedback and we can go from there.
If you turn the power off and it's still there then it's not anything electrical in the flat.. it could be transferred noise from another source. I would try locating the sound by listening through a tube to locate the sound more accurately. This method of sound source location is used by old fashioned mechanics listening for engine noises and is very good at finding them..
good luck !
It not wired in right that why its coming on when it is off The boiler is over riding the programmer when it is off .
The boiler should call for heat if programme is on it sounds like boiler is wired into the 24hr mode or over ride mode that why it is coming on . google wiring for y plan heating system. this will help you fault find on this . changing vales and thermostats will not help you . Hope this helps .
back boiler run from a gas fire? check the instructions to operate the gas heat to the back boiler not just the fire I presume that this a fully pumped system - air lock doubtful There maybe on/off valves on the pipes to and from the back boiler [situate close to cylinder] make sure they are on - anticlockwise turn or there could be a blockage in the outlet from header tank usually in the loft. or If there is no water in it maybe the mains cold feed it is off. Note if no water in it DO NOT USE the back boiler
I couldn't find the exact match for your boiler but I have included the website for you. Since you have the product right there, you will probably have better luck. If you can't find what you need, then use the contact info and give them a ring.
check to see the time clock is set with the clock symbol. there are three settings on analog clocks I , O and clock the I setting is constant running, the O setting is off and the clock setting is timer.
also try setting the thermostat up higher to see if the boiler fires.
Prior to writing the above fault I had asked the owner to turn the boiler temp controller , for the heating side, down just a fraction . I was phoned this morning to tell me that the boiler had stayed on allnight with no fault light . After consulting with the plumber who fitted the system it appears that there might not be a room stat ,