Honeywell T4 Pro Installation Instructions Manual page 8

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Advanced setup options (ISU) (continued)
# ISU
ISU Name
435
Keypad Lockout
702
Number of Air Filters
711
Air Filter 1 Replacement Reminder
712
Air Filter 2 Replacement Reminder
1400
Backlighting
1401
Backlight brightness
1410
Clock Format
1415
Daylight Saving Time
1420
Temperature Display Offset
ISU Options (factory default in bold)
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 displayed for a
short time, when you are about to lock the thermostat screen. Please
note the code in safe place for future reference.
0 - 2
Note: This ISU refers to the number of air filters in the system.
0 = Off
1 = 10 Run Time Days
2 = 20 Run Time Days
3 = 30 Run Time Days
4 = 45 Run Time Days
5 = 60 Run Time Days
6 = 90 Run Time Days
7 = 120 Run Time Days
8 = 150 Run Time Days
9 = 30 Calendar Days
Note: Set a reminder for when to change your air filter. Choose either
calendar or equipment run time-based reminder.
0 = Off
1 = 10 Run Time Days
2 = 20 Run Time Days
3 = 30 Run Time Days
4 = 45 Run Time Days
5 = 60 Run Time Days
6 = 90 Run Time Days
7 = 120 Run Time Days
8 = 150 Run Time Days
9 = 30 Calendar Days
Note: Set a reminder for when to change your air filter. Choose either
calendar or equipment run time-based reminder.
0 = On Demand
1 = Continuous
Note: Common wire needed for continuous.
1 - 5
Note: Only displayed if continuous backlight selected.
12 / 24
0 = Off
1 = On
Note: Set to Off in areas that do not follow Daylight Saving Time.
-3 to 3F (0)
-1.5 to 1.5C (0)
Note: 0 °F - No difference in displayed temperature and the actual room
temperature. The thermostat can display up to 3 °F (1.5 C) lower or
higher than the actual measured temperature.
8
10 = 45 Calendar Days
11 = 60 Calendar Days
12 = 75 Calendar Days
13 = 3 Calendar Months
14 = 4 Calendar Months
15 = 5 Calendar Months
16 = 6 Calendar Months
17 = 9 Calendar Months
18 = 12 Calendar Months
19 = 15 Calendar Months
10 = 45 Calendar Days
11 = 60 Calendar Days
12 = 75 Calendar Days
13 = 3 Calendar Months
14 = 4 Calendar Months
15 = 5 Calendar Months
16 = 6 Calendar Months
17 = 9 Calendar Months
18 = 12 Calendar Months
19 = 15 Calendar Months

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