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boiler controls

  1. HVAC
    I have an old fuse box installed near my gas heating system boiler (which heats two zones: house and den). The fuse box contains two 15 A fuses, installed in a ceramic fixture. From one fuse (on the left) a line (Romex) runs to an on-off switch installed at the boiler. From the other fuse...
  2. HVAC
    I have a Wirsbo Hydronic heating system, Weil-McLain GV4 Series 2 gas bolier & W-M Indirect-fired water heater installed in 1993. Recently updated the W-M Gold Control Module with a United Technology 1014-200 GCM. Discovered the boiler was wired to cycle on the water temp limit switch on the...
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