System Set Up
<Continued from the previous page.>
<Main Controller Menu Tree>
Domestic Hot Water (DHW)/Legionella Prevention
The domestic hot water and legionella prevention menus control the operation of DHW
tank heat ups.
<DHW mode settings>
1. Highlight the hot water icon and press CONFIRM.
2. Use button F1 to switch between Normal and ECO heating modes.
3. To edit the mode, press down the MENU button for 3 seconds, then select "hot water".
4. Press F2 key to display the HOTWATER (DHW) SETTING menu.
5. Use F2 and F3 keys to scroll through the menu selecting each component in turn by
pressing CONFIRM. See the table below for description of each setting.
6. Enter the desired number using the function keys and press CONFIRM.
DHW max. temp.
Desired temperature of stored hot water
DHW max. temp. drop
Difference in temperature between DHW max. temp. and the temperature at which DHW mode restarts 5 - 30
DHW max. operation time Max. time allowed for stored water heating DHW mode
DHW mode restriction
The time period after DHW mode when space heating has priority over DHW mode temporarily pre-
venting further stored water heating
(Only when DHW max. operation time has passed.)
DHW mode can run in either 'Normal' or 'Eco' mode. Normal mode will heat the water in the DHW tank more quickly using the full power of the heat pump. Eco mode
takes a little longer to heat the water in the DHW tank but the energy used is reduced. This is because heat pump operation is restricted using signals from the FTC
based on measured DHW tank temperature.
Note: The actual energy saved in Eco mode will vary according to outdoor ambient temperature.
Select the amount of DHW tank. If you need much hot water, select LARGE.
Return to the DHW/legionella prevention menu.
External input settings
Thermo ON output
Summary of settings
Booster heater 1 capacity
Booster heater 2 capacity
Water pump input
Delivered energy adjustment
Electric energy meter
Demand control (IN4)
OFF (Heat source)/Boiler
Outdoor thermostat (IN5)
Shaded items relate
to DHW functions.
These are only avail-
able if the system in-
cludes a DHW tank.
Select download data
Select upload data
40 - 60
30 - 120
30 - 120