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Thermostat bypass for testing & skimming

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Hap_Hazzard
Hap_Hazzard Member Posts: 2,846
I used to just grab a clip lead and jumper out the thermostat wires when I had to skim my boiler, but it was a little hard to keep the water temperature at the boiling point that way, so I decided to put in a bypass switch. As I was rummaging through my switch bin, I found this timer, and decided that might be a better thing to use because I could use it for testing scenarios, and it would also be safer, because I couldn't forget to turn it off if I got distracted.

While I was at it, I moved the transformer from the breaker box to the boiler and added an on/off switch so I can kill the power to the boiler without having to run to the breaker box.
Just another DIYer | King of Prussia, PA
1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24

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  • SteamingatMohawk
    SteamingatMohawk Member Posts: 1,007
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    Nice idea. Isn't there a master switch required somewhere near the boiler (red metal cover plate)?

    I wired up a second thermostat near the boiler so I didn't have to go from the basement to a second floor front apartment, through 3 locked doors.

    I connected each thermostat to terminals on a SPDT (ON-OFF-ON) switch in a junction box and mounted it in the overhead near the boiler.

    Some time later, I changed to a Honeywell wireless thermostat (battery powered) with a wifi gateway and now I can monitor and control the thermostat from anywhere I have wifi. No more going up and down stairs. One of the tenants let me connect the gateway to her router.

  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
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    Isn't there a master switch required somewhere near the boiler (red metal cover plate)?

    I'm not sure what the code says, but there was no such switch when I moved in. It did seem like a good idea to add one. If I still have this boiler when I sell the house I'll have to see what the code says and bring everything up to code as much as possible.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24