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Installation and Setup
30
homexpert
tm
by Honeywell THR872CUK Wireless Programmable Thermostat
31
Installer setup functions — System settings
Function Description Setting Options
1: Ot Minimum boiler on time 1 minute **
Options: 1 to 5 minutes
See page 31 for important information
2: Cr Cycles per hour (CPH) 6 cycles per hour **
Options: 3, 6, 9 or 12
See page 31 for important information
4: HC Heating/Cooling options 0: No central cooling system installed **
1: Allows switching between heating and cooling systems
Thermostat cannot control cooling unless you select 1
5: PE Pump exercise 0: Off **
1: On (turns on pump periodically to keep equipment
functioning properly)
7: LC Behaviour when relay box cannot
communicate with thermostat
0: Relay box turns off **
1: Relay box operates 20% on / 80% off
** Factory default settingEnter Installer Setup (see page 27), then press > for access to system settings
See page 27 to change these settings. Always press OK after changing any setting.
Customised settings for your system
Your heating system Changes required Setting Options
Standard gas boiler
(<30kW)
None No change
Zone Valve None No change
Oil boiler System setting 1: Ot
System setting 2: Cr
Set to 4 minutes
Set to 3 CPH
Thermal actuator System setting 2: Cr Set to 12 CPH
Electric heating System setting 2: Cr Set to 12 CPH
Your cooling system Changes required Setting Options
Heat pump/air conditioner System setting 1: Ot
System setting 2: Cr
System setting 4: HC
Set to 4 minutes
Set to 3 CPH
Set to 1
Fan coil System setting 4: HC Set to 1
NOTE: After changing the above settings to accommodate a cooling system, you can switch the thermostat to
control either heating or cooling (see page 10).
16


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