B
Bob Hill
Hi all,
So i've had a request from someone to look into the possibility of fitting an electric heater onto their existing back boiler system.
Their set up is:
Coal fired back boiler which serves a cylinder (with immersion heater for back up) and about 6 standard sized rads (mix of single and double panel). The Hot water is gravity and the heating has an ancient circulation pump on it. The system is open vented (though the vent for the heating side is only in 15mm which seems worrying to me - still it's been working fine up till now).
They were looking at a heatre sadia Amptec: Heatrae Sadia
It's basically a big heat exchange tube as far as I can fathom.
I've heard that these may end up being more costly to run that the larger electromax ones which include a cylinder and can heat water at off peak and store it for later.
They don't want the hassle of decommissioning the back boiler so were thinking of leaving it as part of the system (A big dead leg I guess...)
My thinking is the following:
The system could be upgraded to a 3 way mid position valve (with suitable controls) to allow separate hot water and heating and the electric boiler could be fitted. The problem with this is that should the back boiler ever be used this could create a situation where hot water is pushing against a closed 3 port valve.
The second issue is that the electric boilers have a thermal cut out of about 95-100 degrees which could be tripped should the back boiler be used.
I'd be interested to hear what others experiences and recommendations are in this situation - feel free to tell me i'm being stupid and have forgotten something obvious (but be nice)
Thanks in advance.
So i've had a request from someone to look into the possibility of fitting an electric heater onto their existing back boiler system.
Their set up is:
Coal fired back boiler which serves a cylinder (with immersion heater for back up) and about 6 standard sized rads (mix of single and double panel). The Hot water is gravity and the heating has an ancient circulation pump on it. The system is open vented (though the vent for the heating side is only in 15mm which seems worrying to me - still it's been working fine up till now).
They were looking at a heatre sadia Amptec: Heatrae Sadia
It's basically a big heat exchange tube as far as I can fathom.
I've heard that these may end up being more costly to run that the larger electromax ones which include a cylinder and can heat water at off peak and store it for later.
They don't want the hassle of decommissioning the back boiler so were thinking of leaving it as part of the system (A big dead leg I guess...)
My thinking is the following:
The system could be upgraded to a 3 way mid position valve (with suitable controls) to allow separate hot water and heating and the electric boiler could be fitted. The problem with this is that should the back boiler ever be used this could create a situation where hot water is pushing against a closed 3 port valve.
The second issue is that the electric boilers have a thermal cut out of about 95-100 degrees which could be tripped should the back boiler be used.
I'd be interested to hear what others experiences and recommendations are in this situation - feel free to tell me i'm being stupid and have forgotten something obvious (but be nice)
Thanks in advance.