One HVAC guy I knew went as far as replacing a water to air HP in the ceiling and it still wouldn't work. Using about 10 min of my time, the thermostat wire had a short.

I would not call him an HVAC guy being so stupid to not check the low voltage wiring before replacing the unit.

25+ years of experience too.

In a walk through of the renovation, I discovered one of the HVAC water loop valve operator stuck in the firewall and drywall compounded around it so it couldn't be moved.

The contractor who built the building was a little looney too. The building called for an isolated pad probably 50' x 75'. They had a novel way of creating one. They poured the entire building floor and then jackhammered out the part that was to be isolated and then poured the isolated pad.

The HVAC system installed (new building) was looney too. In one instance some bozo installed 2 HP's in the same room with two auto-changeover thermostats in the same room. One per pump. They also installed the condensate drains into the sanitary sewer and didn't allow enough pitch. There were at least 36 water to air HP's in this building. Basic disaster.

Kiss, Also thanks for the application, that's the kind of info that I understand, simple and to the point

But still, the voltage is not an issue.

Lots of issues: # turns, core magnetization, how much load is placed on the transformer.

JimmyTheAirGuy disagrees


You disagreed on post #1 when I was asking what the device should be fused at? Have you ever seen something that someone put a bigger (or smaller) fuse in than belongs in it? Just because you took a fuse out of XX ratings you can NEVER assume that was the correct fuse in the first place.

Disagrees whould only be used in cases of factually incorrect information.

I have a degree in Electronic Engineering... and you never make assumptions that what you took out was the correct item to begin with just because it was there.