Honeywell T6 Pro Installation Instructions

9
# ISU ISU Name ISU Options (factory default in bold)
221 Heat Stages / Backup Heat Stages Heat Stages: 1, 2
Backup Heat Stages: 0, 1
230 Fan Control in Heat 1 = Equipment Controls Fan
2 = Thermostat Controls Fan
253 Aux/E terminal control (Fixed to
“0” setting on all models except
TH6320U)
0 = Drive both Aux & E together
1 = Aux and E independent
255 Backup Heat Source
(Heat Pump Only)
(TH6320U / TH6220U only)
1 = Electric Forced Air
2 = Gas/Oil Forced Air (or Fossil Forced Air)
256 Emergency Heat Source (TH6320U
only)
1 = Electric Forced Air
2 = Gas/Oil Forced Air (or Fossil Forced Air)
260 External Fossil Fuel Kit
(TH6320U / TH6220U only)
0 = Thermostat Controls Backup Heat
1 = External Fossil Fuel Kit Controls Backup Heat
300 System Changeover
0 = Manual
1 = Automatic
303 Auto Changeover Differential 0 °F to 5 °F
0.0 °C to 2.5 °C
Note: Differential is NOT deadband. Honeywell uses an advanced algorithm that
fixes deadband at 0 °F. The differential setting is the minimum number of degrees
from set-point needed to switch from the last mode running (heat or cool) to the
opposite mode when the thermostat is in auto-changeover. This is more advanced
than previous thermostats.
340 Backup Heat Droop
0 = Comfort
2 = 2 °F
3 = 3 °F
4 = 4 °F
5 = 5 °F
6 = 6 °F
7 = 7 °F
8 = 8 °F
9 = 9 °F
10 = 10 °F
11 = 11 °F
12 = 12 °F
13 = 13 °F
14 = 14 °F
15 = 15 °F
Note: 0 (comfort) setting only available if backup heat (ISU 255) is set to electric.
350 Upstage Timer for Backup Heat
0 = Off
1 = 30 minutes
2 = 45 minutes
3 = 60 minutes
4 = 75 minutes
5 = 90 minutes
6 = 2 hours
7 = 3 hours
8 = 4 hours
9 = 5 hours
10 = 6 hours
11 = 8 hours
12 = 10 hours
13 = 12 hours
14 = 14 hours
16 = 16 hours
355 Compressor Lockout / Balance Point
-- = Off
5 °F to 60 °F (in 5 °F increments)
15.0 °C to 15.5 °C (in 2.5 °C or 3.0 °C increments)
Note: Use a wired sensor to set compressor lockout / balance point on TH6320U
/ TH6220U.
356 Outdoor Lockout Backup Heat
-- = Off
5 °F to 65 °F (in 5 °F increments)
15.0 °C to 18.5 °C (in 2.5 °C or 3.0 °C increments)
365 Compressor Cycle Rate (Stage 1) 1 - 6
366 Compressor Cycle Rate (Stage 1) 1 - 6
370 Heating Cycle Rate (Stage 1) 1 - 12
371 Heating Cycle Rate (Stage 2) 1 - 12
375 Heating Cycle Rate Auxiliary Heat 1 - 12
378 Heating Cycle Rate Emergency Heat
(TH6320U only)
1 - 12
Advanced setup options (ISU)

Honeywell T6 Pro Specifications

General

Display	Touchscreen
Energy Star Certified	Yes
Power Source	Battery or Hardwired
Operating Modes	Heat, Cool, Auto, Off
Geofencing	Yes
Compatibility	Works with most HVAC systems
Fan Modes	Auto, On, Circulate
Remote Access	Yes
Energy Saving Features	Smart Response Technology
Connectivity	Wi-Fi
Warranty	5-year limited warranty