p12nash
New Member
I have recently had a Bosch IDS Premium Connected Heat Pump Model #BOVD-36HDN1-M20G and Air Handler Model #BVA-36WN1-M20 heat pump system installed with a hydrocoil connected to my Navien NFC-250/175H firetube combi boiler. The system is split into 2 zones, 1 for the 1st floor and 1 for the 2nd floor. I retained the previous radiators and have them connected to 1 thermostat that drives both floors. This thermostat is set low and doesn't run the radiators, however it would if there was a failure of the other heating system and the indoor temp dropped too low. I have a few questions about getting the settings for my system dialed in.
- The installer for the Navien said they usually don't mess with turndown settings. I feel like this is losing efficiency - am I right, and should I be adjusting that? I am located a little North of Boston, MA on the coast. My home was built in 1930, but has been recently reinsulated with blown in in the walls and attic.
- What are the optimal baseline settings for my aux heat? I have Ecobee 3 lite thermostats that are set to the following:
- Configure Staging- auto
- Aux Savings Optimization- 2.9F
- Aux Heat Max Outdoor temp- 50F
- Compressor Min Cycle Off Time- 300 sec
- Compressor Min Outdoor Temp- 35F
- AC Overcool Max- Disabled
- Aux Min on Time- 5 min