6
Equipment Setup Options
# ISU ISU Name
ISU Options (defaults in bold)
Notes
120
Schedule Type
No Schedule
MO-SU = Every day the same
MO-FR, SA, SU = 5-1-1 schedule
MO-FR, SA-SU = 5-2 schedule
Each Day = Every day individual
You can change default MO-FR, SA-SU schedule here. To edit periods during days, tempera-
ture setpoints, or to turn Schedule On/Off, from the home screen, go to
MENU
/
SCHEDULE
.
125
Temp Scale
Fahrenheit
, Celsius
130
Outdoor Temp
No,
Internet
Select outdoor temperature data source. This ISU automatically defaults to Internet when
registered to the Honeywell Home app. An outdoor temperature is required to set the following
ISUs: ISU 355 Compressor Lockout, ISU 356 Aux Heat Lockout.
200
System Type
Conventional Forced Air
Heat Pump
Boiler
Cool Only
Basic selection of system your thermostat will control.
205
Equipment Type
Conventional Forced Air Heat:
Standard Gas (STD GAS),
High
Efficiency Gas
(EFF GAS)
, Oil, Electric, Fan Coil*
Heat Pump:
Air To Air, Geothermal
Boiler:
Hot Water
, Steam
This option selects the equipment type your thermostat will control. Note: This option is
NOT
displayed if ISU 200 is set to Cool Only.
* Fan coil setting is for a residential application with a hot water coil in an air-handler.
218
Reversing Valve
0/B on Cool,
0/B on Heat
This ISU is only displayed if ISU 200 is set to Heat Pump. Select whether reversing valve O/B
should energize on cool or on heat
220
Cool Stages
(#200=Conv./
200=HP)
0,
1
, 2
221
Heat Stages/
Aux/E Stages
(#200=Conv./
200=HP)
Heat Stages: 0,
1
, 2
AUX/E Stages:
0
, 1
Maximum of 2 Heat Stages for conventional systems. Maximum of 1 Aux/E stages for heat
pump systems.
230
Fan Control
Equipment,
Thermostat
This ISU is only displayed if ISU 205 is set to Electric Forced Air or Fan Coil.
300
Auto Changeover On,
Off
OFF:
The user must select heating or cooling as needed to maintain the desired
indoor temperature.
ON (Automatic):
On (enabled) Allows user to select Auto Changeover as one of the system
modes from the home screen. In auto mode, the thermostat can control either heating or cool-
ing to maintain the desired indoor temperature.
303
Auto Differential
0 °F
to 5 °F or
0.0 °C
to 2.5 °C
Differential is the minimum number of degrees rise or fall required during off cycle to switch
from the last active mode (heat or cool) to the opposite mode when the thermostat is in
auto-changeover. Differential is NOT deadband. The deadband temperature between when
heating (or cooling) cycles on and cycles off to maintain setpoint is not adjustable. The T5
thermostat uses an algorithm that fixes deadband at 0 °F.
355
Balance Point
(Compressor
Lockout)
Off,
5 °F to 60 °F (in 5 °F increments) or -15.0 °C
to 15.5 °C (in 2.5 °C or 3.0 °C increments)
Compressor Lockout requires an outdoor temperature. Set Compressor Lockout to the
temperature below which it is inefficient to run the heat pump. When outside temperature is
below this setting, thermostat will lockout heat pump and run Aux Heat only. This ISU is only
displayed if ISU 130 = Internet, ISU 200 is set to Heat Pump, ISU 221 Aux/E stages = 1,.
356
Aux Heat Lock
Out (Aux Heat
Outdoor Lockout)
Off,
5 °F to 65 °F (in 5 °F increments) or
-15.0 °C to 18.5 °C (in 2.5 °C or 3.0 °C incre-
ments)
Aux Heat Lockout requires an outdoor temperature. Set Aux Heat Lockout to optimize energy
bills and to not allow it to run the more expensive Aux Heat source above certain outdoor tem-
perature limit. This ISU is only displayed if ISU 200 is set to Heat Pump, AND if ISU 221 Aux/E
stages = 1.
365
Cool 1 CPH
(Cooling cycle
rate stage 1)
1 - 6 CPH
(3 CPH)
This ISU is only displayed when Cool /Compressor Stages is set to 1 or more stages. Cycle rate
limits the maximum number of times the system can cycle in a 1 hour period measured at a
50% load. For example, when set to 3 CPH, at a 50% load, the most the system will cycle is 3
times per hour (10 minutes on, 10 minutes off). The system cycles less often when load condi-
tions are less than or greater than a 50% load.
366
Cool 2 CPH
(Cooling cycle
rate stage 2)
1 - 6 CPH
(3 CPH)
This ISU is only displayed when Cool /Compressor Stages is set to 2.
Note:
ISU options available may vary upon the thermostat model and equipment setup.
