Honeywell Home T4 Pro Notice D'installation page 8

Advanced setup options (ISU) (continued)
# ISU ISU Name
350 Upstage Timer for Backup
Heat (TH4210U only)
365 Compressor Cycle Rate
(Stage 1)
370 Heating Cycle Rate (Stage 1)
375 Heating Cycle Rate Auxiliary
Heat (TH4210U only)
387 Compressor Protection
425 Adaptive Intelligent Recovery
430 Minimum Cool Setpoint
431 Maximum Heat Setpoint
435 Keypad Lockout
ISU Options (factory default in bold)
0 = Off
1 = 30 minutes
2 = 45 minutes
3 = 60 minutes
4 = 75 minutes
1 - 6
Note: This ISU is only displayed when Cool /Compressor Stage
is set to 1 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.
1 - 12
Note: This ISU is only displayed when Heat Stage is set to 1 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. 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.
1 - 12
0 = 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 "Wait" in the display.
This ISU is displayed if ISU 220 is set to at least 1 stage.
0 = No
1 = Yes
Note: Adaptive Intelligent Recovery (AIR) is a comfort setting.
Heating or cooling equipment will turn on earlier, ensuring the
indoor temperature will match the setpoint at the scheduled time.
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.
40 °F to 90 °F (90 °F)
4.5 °C to 32.0 °C (32 °C)
Note: The heat temperature cannot be set above this level.
0 = None
1 = Partial
2 = Full
Note:
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 1234.
8
5 = 90 minutes
6 = 2 hours
7 = 3 hours
8 = 4 hours
10 = 5 hours