Not sure about this valve, electric might be better.

Steamhead (in transit)

a tankless coil or an indirect tank for your domestic hot water?

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Vic Belanger

Valve

Hello, hopefully some of the experts here might be able to help with a problem I'm having.

I just replaced my boiler with a NYThermal Legacy L150. The old boiler had a circulating pump which operated 24/7

Vic Belanger

Valve

Hello, hopefully some of the experts here might be able to help with a problem I'm having.

I just replaced my boiler with a NYThermal Legacy L150. The old boiler had a circulating pump which operated 24/7 but the new boiler automatically shuts off the circulating pump when the flame shuts off.

Here's the problem; before the new boiler I had a perfectly quiet heating system, now with the new boiler I hear the copper pipes creaking and groaning as they expand when the boiler starts up.

There is a valve on the single pipe loop (on the oulet pipe near the boiler) that gives hot water priority for the domestic hot water supply. This valve (see attachment) shuts off gravity water flow unless the circulating pump is operating. Does anyone here know if there is an electric valve that does the same job as the one in the attachment? My thinking is that an electrically operated valve (that would open and close depending upon domestic hot demand) would shut off the main heating water flow only when domestic hot water is called for and then it would reopen fully to allow full flow through the loop.

The valve seems to restrict water flow allowing the pipes to cool too much when the boiler shuts off then they have to expand drastically causing all the noise when the pump starts flowing hot water through them.

I am no expert obviously so please don't be afraid to teach me a thing or two about my boiler.

Best regards, Vic

Vic Belanger

It is a tankless coil setup.

Vic

lwal

purged?

Just wondering, has the system been pyrged completely?

Steamhead (in transit)

There you go.....

The boiler must maintain temperature all the time for the coil to work. When that full-temperature water hits the pipes, they expand and creak.

If that were my boiler I'd install an Aquabooster or similar tank onto that coil. Then the tank would store the hot water, and the boiler would only fire when the tank or the room thermostat called for heat.

This should cure your creaking, and save fuel too.

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Vic Belanger

That's a great suggestion. Any idea what those Aquaboosters cost? Also, once I installed an Aquabooster would I then leave the valve in question fully open?

Thanks again, Vic

Vic Belanger

Yes, it was thouroughly purged to determine if that was the problem or not.

Vic