UT-3000 OAS SP 42°F Limit - Needs 55°F Changeover Due to Extreme Electric Rates

[woodegg]

Got a challenging situation with a customer in Princeton, NJ that's pushing the limits of the UT-3000's programming capabilities. Looking for any workarounds or insights from those more experienced with EWC controls.

Installation Details:

• System: Daikin FIT dual-fuel (heat pump + 80% AFUE furnace)
  Control: EWC UT-3000 (V1.85) with 4 zones
  Thermostats: Daikin One Touch communicating stats
  Install Date: System fully commissioned and operational
  Location: Princeton, NJ (PSE&G territory)

The Challenge:

Done the math on the utility rates - the economic balance point is around 52-55°F, not the typical 30-35°F we usually set.

PSE&G rates:
Electric: $0.296/kWh all-in
Gas: $1.487/therm all-in
Ratio: 6:1 (never seen it this extreme)

Break-even COP calculates to 4.66, which means the heat pump costs more to run than gas whenever outdoor temp drops below ~55°F.

The Problem:
The UT-3000's OAS SP (Outdoor Air Setpoint) maxes out at 42°F in the menu. Can't set it any higher. This means:
Forced to run expensive heat pump from 43-55°F
Losing them $100-150/month in unnecessary operating costs

What I've Already Done:

Optimized everything else:

• W2 Threshold: 65% (minimum)
  W2 OT Lockout: 60°F
  SAS HP Target: Lowered to 95°F
  Zone weights: Maximized

Attempted solutions:

• Looked for service menus (couldn't find any)
  Called EWC tech support (they said 42°F is the limit)
  Researched alternative controllers (would lose Daikin integration)

Questions for the Pros:

Has anyone successfully exceeded the 42°F OAS SP limit?

• Service codes I'm missing?
  Jumper settings on the board?
  Different firmware versions?
  Creative workarounds that maintain zone control?

Technical Notes:

• System communication is stable
  All zones functioning properly

[Steven W.]

Please give us a call on this issue. Thank You.