Installer Setup (Isu); Advanced Setup Options (Isu) - Honeywell T4 Pro Installation Instructions Manual
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Also See for T4 Pro:
- User manual (19 pages) ,
- Installation instructions manual (37 pages) ,
- Installation instructions manual (37 pages)
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Installer setup (ISU)
1 Press and hold CENTER and
approximately 3 seconds to enter advanced
menu.
2 Press Select to enter ISU.
3 Press Select to cycle through menu setup
options.
4 Press
or
from available options.
5 Press Select and confirm your settings or
press Back to ignore changes and return
to ISU menu screen to continue editing
another setup option.
6 To finish setup process and save your
setting, press Home and return to Home
screen.
NOTE: A complete list of all setup (ISU)
parameters and options starts below and
continues through page 10.
Advanced setup options (ISU)
NOTE: Depending on system settings, not all options may be available.
# ISU
ISU Name
120
Scheduling Options
125
Temperature Indication Scale
200
Heating System Type
205
Heating Equipment Type
buttons for
to change values or select
ISU Options (factory default in bold)
0 = Non-Programmable
2 = 5-2 Programmable
3 = 5-1-1 Programmable
4 = 7-Day Programmable
Note: You can change default MO-FR, SA-SU schedule here. To edit
periods during days, temperature setpoints, or to turn Schedule On/Off,
touch MENU and go to SCHEDULE.
0 = Fahrenheit
1 = Celsius
1 = Conventional Forced Air Heat
2 = Heat Pump
3 = Radiant Heat
5 = None (Cool Only)
Note: This option selects the basic system type your thermostat will
control.
Conventional Forced Air Heat:
1 = Standard Efficiency Gas Forced Air
2 = High Efficiency Gas Forced Air
3 = Oil Forced Air
4 = Electric Forced Air
5 = Hot Water Fan Coil
Heat Pump:
7 = Air to Air Heat Pump
8 = Geothermal Heat Pump
Radiant Heat:
9 = Hot Water Radiant Heat
12 = Steam
Note: This option selects the equipment type your thermostat will control.
Note: This feature is NOT displayed if feature 200 is set to Cool Only.
6
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Need help?
Do you have a question about the T4 Pro and is the answer not in the manual?
Questions and answers
How to switch?
To switch settings on the Honeywell T4 Pro thermostat, use the Plus or Minus buttons to navigate through options and adjust values. Press the Select button to confirm choices. For temperature overrides, press the Plus or Minus buttons from the home screen to adjust the temperature. The thermostat will hold this setting until the next programmed time. The Hold button allows switching between temporary and permanent holds. To cancel all holds, press the Cancel button. To change fan settings, toggle between "Fan Auto" (runs only when heating or cooling is active) and "Fan On" (runs continuously) by pressing the corresponding button.
This answer is automatically generated
@Mr. Anderson how to switch again?
WHY ARENT ALL WIRES USED
Not all wires are used in the Honeywell T4 Pro thermostat because different HVAC systems require different wiring configurations. The thermostat supports various system types, including single transformer, dual transformer, heat-only, and heat/cool systems. Some terminals may not be needed depending on the specific system setup. Additionally, the THP9045A1023 Wire Saver Module can be used to reduce the number of required wires by combining functions, such as controlling both the fan and compressor with a single wire.
This answer is automatically generated
I HAVE 1 HEAT AND 1 COOLSYSTEM INSTALLER ONLY CONNECTED THE R AND C WIRES NOTHING TO Y W OR G
For a Honeywell T4 Pro thermostat with a one heat and one cool system (1H/1C), connect the wires as follows:
- Y (Compressor contactor): Connect to the Y terminal.
- W (Heating relay): Connect to the W terminal.
- G (Fan relay): Connect to the G terminal.
Ensure that the R and Rc terminals are properly configured using the slider tab, depending on whether you have one or two R wires.
This answer is automatically generated