I found this site doing some research and decided to join to get more info. I’ve recently purchased my home (15yrs old) and found it to be a mechanical mess. Everything was either not working or needed maintenance. Here is the list:
HRV: Changed main board (blown transformer) and cleaned fans/motors . Installed inline fuse as per Vanee recall. Had to rewire control panel since they just randomly terminated it. I initially wired it like it was and rewired when proven not functional.
Furnace Electrostatic Filter: Needed deep cleaning, I’m assuming the vacuum sensor was clogged.
Gas fireplace: Still not working. It used to go on (once) and stay on but after turning it off it wouldn’t turn back on. After waiting 30mins it would turn on again. I’m thinking it’s the thermopile – pilot is OK. (Side Topic)
Just to let you know, I’m an Industrial Instrumentation Technologist. So I know my way around… but I’m not a HVAC tech, which is why I’m here. Just like any process control, in principle it is simple but there is nothing simple about it.
My system: High Efficiency Furnace, Trade 150 HRV. HRV has independent air return ducting fed from kitchen and three washrooms and the air supply is tied into furnace air return ducts (about 5 feet from furnace).
So my questions:
1) Is it required to interlock my furnace fan with my HRV with this setup?
2) I have the Basic(VT1W) panel and it behaves like this:
a. Dehumisdistat Dial: Does nothing
b. MIN: Fan speed is low while in the MORE humid range and goes on HIGH mid way in the comfort zone and throughout the LESS humid range
c. MAX: Fan speed stays on HIGH regardless of the dial position
I would have thought the dehumisdistat dial would operate the HRV to control humidity depending on setpoint and the MIN/MAX would override the dial?
3) Do furnaces need a fresh air supply? I realize the air intake/exhaust for the burner core. That said, is the burner core a closed circuit?
I have to say I’ve gained a great interest in HVAC and home comfort! This is a very interesting field of work.
Please let me know if you want me to clarify or want pictures.