Recently had a new boiler installed Worcester Greenstar 30 Cdi regular retaining the same cylinder Telford 42x18 indirect. The recovery rate to reach temp.of 60 degrees is now 3hours with the boiler set at 5 giving flow temp. of 65degrees. I would appreciate any advice to speed up recovery rate. The primaries are 15mm pumped
Hot water recovery rate
- Thread starter Devonion
- Start date
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I'm guessing the Telford is a fairly old cylinder and doesn't have a rapid recovery heat exchanger coil inside ?
Replacing the cylinder and increasing the flow temperature could likely get recovery down to 20mins or thereabouts.
Replacing the cylinder and increasing the flow temperature could likely get recovery down to 20mins or thereabouts.
You should always have a differential of at LEAST 10° C between cylinder set temperature and boiler flow temperature.
Furthermore its best to time HW to be different from when heating is on as well so whole boiler output can go to the HW although in your case that's unlikely to be a problem as your boiler is already oversized unless you live in an 8 bedroom mansion.
Tony
Furthermore its best to time HW to be different from when heating is on as well so whole boiler output can go to the HW although in your case that's unlikely to be a problem as your boiler is already oversized unless you live in an 8 bedroom mansion.
Tony
Why did you replace your old boiler, what model was it?
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Thanks for your advice. The cylinder is pretty old-I guess over 15 years.
Could you recommend any make with rapid recovery rate heat exchanger? I would prefer a similar copper cylinder so to keep pipework to a minimum in a very restricted area
Many thanks for your advice re temperature differential. The HW was the only demand on the boiler when I quoted the recovery times
The old boiler was an Ideal Mexico RS90 with SMC control pack but was not economical
A change of control pack and cylinder only plus improved insulation would've given you far more economy for much less money.
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