User manual

Installation and Setup
28
homexpert
tm
by Honeywell THR870CUK Programmable Thermostat
29
Installer setup functions — Thermostat settings
Function Description Setting Options
1: CL Clock format 24: 24-hour time format **
12: AM/PM 12-hour time format
2: rP Reset program schedule 0: Schedule customised by user
1: Reset schedule to factory default (see page 12) **
3: tC Summer/winter time change 0: No change
1: Automatically switch to/from daylight savings time **
4: LA Display screen language Default language varies by location of purchase. Press the
p or q buttons to select an alternate language.
5: bL Screen backlight 0: Off
1: Screen lit when button is pressed **
6: uL Maximum temperature allowed 35°C **
Options: 21° to 35°C
7: LL Minimum temperature allowed 5°C **
Options: 5° to 21°C
** Factory default setting
See page 27 to change these settings. Always press OK after changing any setting.
Installer setup functions — Thermostat settings
Function Description Setting Options
8: OP Optimum start 0: Off **
1: On (see page 19 for description)
9: tS Telephone override 0: Disabled **
1: Telephone override enabled
12: tO Temperature offset 0: No offset **
Options: +3° to -3°C (see page 19 for description)
13: Pb Proportional band width 1.5°C **
Options: 1.5° to 3°C (see page 19 for description)
19: FS RESET TO FACTORY DEFAULT 0: No change
1: Select 1 to restore default settings. All customised
settings will be lost.
** Factory default setting
See page 27 to change these settings. Always press OK after changing any setting.