Honeywell Home T10 Pro RedLINK Manual page 20

T10 PRO SMART THERMOSTAT WITH REDLINK
Installer Setup
ISU # Name
3120 Backup Heat
Lockout
3140 Cool /
Compressor
Cycles Per Hour
Stage 1
3140 Cool /
Compressor
Cycles Per Hour
Stage 2
33-00462—01
Table 5. Installer Setup (ISU)
Settings
Fahrenheit: Off
Off
5° F to 65° F (in 5° F
increments)
Celsius:
Off
-15.0° F to 18.5° F (in
5° F increments)
Note:
When both
Compressor lockout
balance point and
Backup Heat Lockout
are set to other than
"off", the Backup heat
lockout must be at
least 5 degrees F above
the balance point
setting
1-6 3
1-6 3
20
Default
This ISU is used to lockout the auxiliary heat
when outdoor temperature is above this
setting. A 5 degree minimum differential is
enforced between balance point and backup
heat lockout settings.
ISU 3120 Backup Heat Outdoor
Temperature Lockout requires a wired
outdoor sensor or Internet weather
(thermostat connected to Wi-Fi and
registered to an account).
ISU 3120 defaults to off and is not
adjustable unless if ISU 1060 (outdoor
Temperature) is set to either Wired or
Internet.
ISU 3120 is only displayed if ISU 2000
(System Type) is set to Heat Pump, and 2071
(backup heat stages) is set to 1.
See "Heat pump with outdoor temperature
lockouts" on page 40.
NOTE:
This is most commonly used when backup
heat is electric. For dual fuel systems (Heat
pump with gas or oil backup) in which a
balance point is used to switch from heat
pump to gas or oil furnace, if the outdoor
temperature is at the Backup Heat Lockout
setting, it is also above the balance point
setting. When both balance point and Aux
heat lockout are used on dual fuel, if the
thermostat is locking out heat pump due to
droop or upstage timer, and reaches the
Backup Heat Lockout setting, then neither
furnace nor heat pump would run during a
heat call.
Contractors typically only use this setting on
dual fuel applications as a warm weather
shut down setting for the furnace.
This ISU is only displayed when ISU 2070
Cool / Compressor Stages is set to 1 or 2
stage.
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
conditions are less than or greater than a
50% load.
This ISU is only displayed when ISU 2070
Cool / Compressor Stages is set to 2 stage.
Cycle rate limits the maximum number of
times the system can cycle in a 1 hour
period measured at a 50% load for the
active stage.
Notes