Limited Honeywell R8184G Wiring Diagram Tim Tears It Apart: Honeywell R8184 Oil-Fired Boiler Controller - Sure, pleasure-wise this one sounds proper up there with having your toenails waxed, but there are a few interesting bits regardless. Also, i've a broken one sitting in my basement right now, and what do we do with damaged gadgets???. ?but tiiiim! That sounds booooorrrring. Why this aspect, and now not one of these fancy cloud-enabled thermostats containing more ram than the desktop computer you had in university and not less than five processors able to jogging angry birds at a playable framerate???.
The fat transformer at pinnacle-left steps the 120vac from the road right down to round 24vac to power its very own circuitry and the thermostat (crimson and white wire commonly linked to the “t” terminals). I peeled again the tape at the primary winding a bit so you can see the distinction in cord diameter, taking into account many extra turns on the number one facet. With out documentation or right check device, you could use this to visually decide its characteristic as a step-down transformer and perhaps even make a unfastened guesstimate of the turns ratio. Here is the topside. There’s truly not anything a great deal to it! You may probable take a stab at how this all works simply by means of inspection, however in case not, honeywell affords the actual schematic on their website.
Here is the bottom showing the pcb. This ought to provide some feel as to the age of this design. These curvacious strains are something you simply don’t see inside the generation of pc-aided pcb layout. This board may also thoroughly have been laid out literally through hand, the master hint pattern drawn in magic marker. Speakme of which, i drew an arrow in marker pointing to the likely wrongdoer for this unit’s failure: a cold solder joint on one of the relay terminals, mainly, the only that energizes the orange cord main to the burner and motor. You may also see some strategic cuts within the board itself, supplying a physical air gap to isolate the low-voltage stuff from the road-powered sections close by.