Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Optimal Settings for Heat Pump with Hydrocoil as Aux

p12nash
p12nash Member Posts: 1
in Thermostats and Controls

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.

  1. 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.
  2. What are the optimal baseline settings for my aux heat? I have Ecobee 3 lite thermostats that are set to the following:
    1. Configure Staging- auto
    2. Aux Savings Optimization- 2.9F
    3. Aux Heat Max Outdoor temp- 50F
    4. Compressor Min Cycle Off Time- 300 sec
    5. Compressor Min Outdoor Temp- 35F
    6. AC Overcool Max- Disabled
    7. Aux Min on Time- 5 min

I appreciate any advice you are able to provide.

Categories