Correct thermostat temperatures and modes (HVAC)

See this Asana task for history.

Our AC systems will fight each other if set to different modes - this dramatically increases our power bill and takes away money which could be used to buy consumables and other equipment. 

Read this doc in its entirety before changing anything

Ensuring correct temperatures

  1. Read the rest of this document first for context.
  2. If "Run Schedule" is visible, press it and mention this on #techs - this indicates that the thermostat was in a manual mode.
  3. Select "Set Clock/Day/Schedule", then" Set Schedule". Ensure the times and set points for "Wake", "Leave", "Return", and "Sleep are set accordingly:
    1. Summer (when internal shop temp exceeds 76F)
      1. "Wake": 7:45AM, 82F
      2. "Leave": 10AM, 72F
      3. "Return": 9:30PM, 82F
      4. "Sleep": 10PM, 82F
    2. Winter (when internal shop temp drops below 65F)
      1. "Wake": 7:45AM, 55F
      2. "Leave": 10AM, 65F
      3. "Return": 9:30PM, 55F
      4. "Sleep": 10PM, 55F
  4. Ensure that the schedule is set exactly the same for both MonTueWedThuFri and for SatSun (Sat + Sun separately for conference room) 
  5. Ensure that the conference room thermostat is not displaying "HOLD" on the display. If it is, report to #techs and click on "Run Schedule" to set it on the automated schedule.

If the interface is unclear / confusing, see honeywell_manual.pdf around pg 10:

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Conference room thermostat

The conference room thermostat is a different model from the rest; these are its quirks:

Thermostat Locations

Digital thermostats:

Heater thermostats:

"Away" temperatures

Adjust set point by 10 degrees outside of business hours (higher on cool mode, lower on heat mode)

Summer

Only set to cool mode when the internal shop temperature exceeds 76F 

When the internal shop temperature exceeds 76F:

Winter

Only set to heat mode when the internal shop temperature drops below 65F (or other cases below)

When the internal shop temperature drops below 65F, OR if >24h of below-freezing outside temperatures forecast, OR if temperatures below 0F forecast overnight:


Revision #14
Created 19 October 2025 14:29:22 by Bookstack Admin
Updated 21 May 2026 17:47:54 by Manager Scott Martin