| Thanks for the reply I appreciate it. I've posted at various sites and your the first persjon to actually offer some info as opposed to the usual "call in pro"
Just started happening ?
Not sure , I just noticed it.
If I had the bonnet sensor installed, then I could see both the HP and the furnace running at the same time during defrost, but as they didn't install the "optional" bonnet sensor, that's not supposed to occur. (Well according to the York info states that )
It may be part of the a defrost cycle, as I don't know if the fan stopped during these events and yes, they are relatively short events ... say a few minutes. But it's triggered by me bumping up the T'stat while in hot heat pump mode. This would seem to be a software problem as the defrost board should not allow this. No bonnet sensor, no simultaneous operation ?
I too have read that simultaneous operation may affect longevity so I wondered why there was always the "rule" that a bonnet sensor must be installed in FFuel mode ?
I'm going to install the IAQ but initially wire it with no outdoor sensor and leave the Defrost board as the "master". Why ? Well I need to move the T'stat back to where my old T'sat was before the HP install. They moved the T'sat near the front door and two heat registers so it basically warms a small portion of the house if I don't close the registers which defeats the wjhole purpose of having a "central" heating system. Running 10 conductor wiring the old location is quite a chore so I will use the existing 4 wires that are behind the wall.
I'll study for the HP/furnace operation before I rewire/program to have the IAQ control everything.
I'm still searching for some info on how to keep Hot heat pump mode yet still have the IAQ control the switch over. I like the Hot heat pump mode, no cold air when it turns on. Be shame to loose that unless the IAQ can duplicate it. Unlikely as Hot heat pump mode dpeneds on measuring the liquid line temp to make it's decisions.
Questions , questions, I'm full of them
Thanks
Gary  |