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replacing a sensor
remodel
Member Posts: 68
Guys, I have to replace an outlet sensor in a WHN loch 155. I have to drain the heat exchanger. There is plenty of isolation valves. Any pointers. Thanks
0
Comments
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quick
If you can isolate the boiler with valves, then drop the water pressure of the boiler to 0 with the relief valve, then just prep the new sensor and do it quick. UNLESS water can get on any electronics.0 -
ok
Ok, I also have some low drain valves on the bottom of my boiler pump loop and closely spaced tee/system loop, they are the two low points on the p/s piping. Should I just use those instead of PReV? Should I shut off makeup water as well? Also when you say prep.....sensor has a small gasket, should I also dope the threads, it is just a standard brass threaded piece with electric connection on backside? Thanks Steve. Waiting for the weekend just incase there is an issue on startup.0 -
question
When I refill and slowly open everything up should I wait an hour for the HX to cool off or with this mod/con no worries? I have one vertical pump so I will pressurize to 20psi. Anything I need to know on the LWCO or once I refill, should have no issue.0
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