homexpert THR842DUK User Manual page 12

Installation and Setup
Installer setup functions
Function Description
1: Ot Minimum boiler on/off time
2: Cr Cycles per hour (CPH)
3: Pb Proportional band width
4: tO Temperature offset
5: uL Maximum temperature allowed
6: LL Minimum temperature allowed
NOTE: See descriptions of functions on page 23.
** Factory default setting
Setting Options
1 minute **
Options: 1 to 5 minutes
See page 24 for important information
6 cycles per hour **
Options: 3, 6, 9 or 12
See page 24 for important information
1.5°C **
Options: 1.5° to 3°C
0: No offset **
Options: +3° to -3°C
35°C **
Options: 21° to 35°C
5°C **
Options: 5° to 21°C
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Installer setup functions
p q
Enter Installer Setup (see page 19), then press or for access to system settings
Function Description
7: ES ECO default temperature
8: HC Heating/Cooling options
9: OS Frost protection temperature
10: LC Loss of communications
instruction
11: FS RESET TO FACTORY DEFAULT
NOTE: See descriptions of functions on page 23.
homexpert by Honeywell THR842DUK Wireless Digital Thermostat
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Setting Options
18°C **
Options: 5° to 35°C
0: No central cooling system installed **
1: Allows switching between heating and cooling systems
Thermostat cannot control cooling unless you select 1
5°C **
Options: — (none) or 5° to 16°C
0: Switch relay off **
1: Operate relay 20% on / 80% off
0: No change
1: Select 1 to restore default settings. All customised
settings will be lost.
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