12
Quick Installation Guide
Number
Description
Options (factory default in bold)
366
Cool 2 CPH (Cooling
cycle rate stage 2)
1 - 6 CPH
(3 CPH)
Note: This ISU is only displayed when Cool /Compressor Stages is set to 2.
370
Heat 1 CPH (Heating
cycle rate stage 1)
1 - 12 CPH
Note: This ISU is only displayed when Heat Stages is set to 1 stage 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
conditions are less than or greater than a 50% load. The recommended (default) cycle rate
settings are below for each heating equipment type:
Standard Efficiency Gas Forced Air = 5 CPH; High Efficiency Gas Forced Air = 3 CPH; Oil
Forced Air = 5 CPH; Electric Forced Air = 9 CPH; Fan Coil = 3 CPH; Hot Water Radiant Heat
= 3 CPH; Steam = 1 CPH.
371
Heat 2 CPH (Heating
cycle rate stage 2)
1 - 12 CPH
Note: This ISU is only displayed when Heat Stages is set to 2 stages. The recommended
(default) cycle rate settings are below for each heating equipment type:
Standard Efficiency Gas Forced Air = 5 CPH; High Efficiency Gas Forced Air = 3 CPH; Oil
Forced Air = 5 CPH; Electric Forced Air = 9 CPH; Fan Coil = 3 CPH; Hot Water Radiant Heat
= 3 CPH; Steam = 1 CPH.
375
Aux Heat CPH (Heating
cycle rate Auxiliary
Heat)
1 - 12 CPH
Note: This ISU is only displayed when ISU 200 = Heat Pump and ISU 221=1. It is only displayed
when Auxiliary Heat is configured. The recommended cycle rate settings are below for each
heating equipment type:
Standard Efficiency Gas Forced Air = 5 CPH; High Efficiency Gas Forced Air = 3 CPH; Oil
Forced Air = 5 CPH; Electric Forced Air = 9 CPH.
378
EM Heat CPH (Heating
cycle rate Emergency
Heat)
1 - 12 CPH
Note: This ISU is only displayed when Emergency Heat is configured and ISU 253: Aux/E
Terminal Control is set to control Aux and E heat Independently. The recommended cycle rate
settings are below for each heating equipment type:
Standard Efficiency Gas Forced Air = 5 CPH; High Efficiency Gas Forced Air = 3 CPH; Oil
Forced Air = 5 CPH; Electric Forced Air = 9 CPH.
387
Compressor Protection
Off,
1 - 5 minutes
Note: The thermostat has a built in compressor protection (minimum off timer) that prevents
the compressor from restarting too early after a shutdown. The minimum-off timer is activated
after the compressor turns off. If there is a call during the minimum-off timer, the thermostat
shows “Cool on” or “Heat On” (heat pump) status blinking on the thermostat home screen. This
ISU is displayed if ISU 220 is set to at least 1 stage
.
390
Ext Fan Run Time
in Cool
Off,
30, 60, 90 seconds
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 minutes
Note: After the call for cooling ends, the thermostat keeps the fan on for the selected amount
of time for increased efficiency. This may reintroduce humidity into the living space. This ISU is
displayed if ISU 220 is set to at least 1 stage.
391
Ext Fan Run Time
in Heat
Off,
30, 60, 90 seconds
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 minutes
Note: After the call for heating ends, the thermostat keeps the fan on for the selected amount of
time for increased efficiency. This ISU is displayed if ISU 230 is set to Thermostat Controls Fan.
425
Smart Response
0 = No
1 = Yes
Note: Smart Response is a comfort setting. Heat or Cooling equipment will turn on earlier,
ensuring the indoor temperature will match the setpoint at the scheduled time. See page 22.
430
Minimum Cool
Temperature Setpoint
50 °F to 99 °F
(50 °F)
10.0 °C to 37.0 °C
(10.0 °C)
Note: The cool temperature cannot be set below this level.
431
Maximum Heat
Temperature Setpoint
40 °F to 90 °F
(90 °F)
4.5 °C to 32.0 °C
(32.0 °C)
Note: The heat temperature cannot be set above this level.
435
Lock Screen
None,
Partial, Full
Unlocked:
User has access to all thermostat settings.
Partially Locked:
User can modify only temperature settings.
Fully Locked:
User cannot modify any settings. Screen will be locked by default factory code
and cannot be changed. This code is displayed for a short time, when you are about to lock the
thermostat screen. Please note the code in safe place for future reference.
