Questions tagged [circulator]

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I have an Rinnai boiler/water heater, one zone. It worked well for 2 years and then began errors

Got E: 140 heat exchanger overheating. The propane company came out and replaced the internal circulator 2 weeks ago. Last night same error. they replaced it again but it still didn't work and they ...
1 vote
2 answers
183 views

Do I need to replace my noisy Grundfos UP15-29SU?

We have a Grundfos UP15-29SU circulator pump that serves multiple units and is making a high pitched whine. Is that normal? Do you think its locked up and I need to remove the cartridge? Or do you ...
1 vote
1 answer
854 views

Can I use a hot water recirculation pump to mitigate risk of exterior wall pipe freeze?

We have a home in a cold location that is unoccupied during much of the cold season. (We're talking -30 F temperatures here.) It's well insulated and we keep it heated, but up in a far corner of the ...
0 votes
1 answer
390 views

Splitting a hydronic zone. Zone valves or separate circulator pump?

I had some plumbers take a look at my hydronic system to discuss splitting the single zone. They proposed to use separate zone pumps. In retrospect the other way to do this would be with zone valves. ...
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2 answers
2k views

No hot water if hot water recirculator pump is shut off

I'm a newbie to the site and posted a question last week regarding help with wiring a Honeywell L6006C Aquasta to a Taco 006-BC4 Hot water Circulator Pump. That question was answered quickly thanks to ...
1 vote
1 answer
1k views

Honeywell L6006C Aquasta wiring to a Taco 006-BC4 Hot water Circulator Pump

I have a Taco 006-BC4 hot water circulator pump installed on a mechanical timer and its been working fine. However, I would like to install a Honeywell L6006C Aquastat to drive the pump so I could ...
1 vote
0 answers
278 views

Tankless Hot Water Recirculation

I recently had a Rheem Tankless Water Heater installed. The rtgh-95dvln-2. They installed the pump kit meant for the water heater, the ap17920. However, I do not have a dedicated recirculation line, ...
4 votes
2 answers
2k views

Does the circulator in an indirect fired water heater point towards the boiler or towards the tank?

In the manual for my SSU-119 indirect fired hot water heater, the following text seems to suggest that the circulator points towards the tank: On the water heater, the boiler supply connects to the ...