The pigtail method is preferred because the circuit does not rely on the terminal screws to provide a fool proof connection and if the quick wire connections on the receptacle are used this a recipe for failure down the road.
The gfci recpts have terminals marked LINE and LOAD ,the incoming...
I have radiant in- slab with a condensing boiler and my Veissmann boiler rep suggested not to do a night setback or an outdoor reset.
Part of this logic was the slow recovery time of in-slab and the boiler is more efficient when condensing.
You want it connected to the c side of the transformer. when you say chassis ground if you mean where the wire from the common side of the transformer connects to the chassis , I think that is fine.
It's common to ground the c side of a transformer grounded .
Short answer , yes
I had a hard time seeing the wire diagram clearly so I wasn't quite sure where the common side of the transformer was going.
:thumbup:
The stat in the wiring diagram does not have a (c) common.
The wifi stat requires a (c) common
24volt transformers have a 24vac(r) and common (c) terminals.
The switch leg out of a thermostat is on the (w) terminal.
You need a 3 wire to the stat.
I would mount the box for the disconnect directly over the knockout of the unit heater.Use a 4x4 or 2x4 box ,and run an armoured cable flex up through a perfectly sized hole in the drywall. No box is required at the ceiling.