4 3 2 1
TBI.3
IN11
IN12
Target temp.
+3
℃
DHW
Target temp.
50
℃
HEATING
55
℃
Freeze stat function
Menu subtitle
Function/ Description
Freeze stat function *1
An operational function to prevent the water circuit from freezing when outdoor ambient tempera-
ture drops.
Flow t.
The target outlet water temperature at water circuit when operating in Freeze stat function. *2
Outdoor ambient
temp.
Minimum outdoor ambient temperature which freeze stat function will begin to operate,
(3 - 20ºC) or choose**. If asterisk (**) is chosen freeze stat function is deactivated. (i.e. primary
water freeze risk)"
*1
When the system is turned off, freeze stat function is not enabled.
*2 Flow t. is fixed to 20ºC and unchangeable.
Simultaneous Operation
For periods of very low outside temperature this mode can be
used. Simultaneous operation allows both DHW and space
heating to run together by using the heat pump and/or booster
heater (if present) to provide space heating whilst only the
immersion heater provides heating for DHW. This operation is
only available if BOTH a DHW tank AND immersion heater are
present on the system.*
• Range of outdoor ambient temperature at which
simultaneous operation starts is −30°C to 10°C (default
−15°C).
• System shall automatically return to routine operation. This
will happen when the outdoor ambient temperature rises
above the selected temperature for this specific mode of
operation.
Cold weather function
For extremely low outdoor ambient temperature conditions when
the heat pump’s capacity is restricted the provision of DHW is
supported by the immersion heater,where fitted.
The support of both space heating and DHW can only be
provided if the heat pump unit is also fitted with an electrical
booster heater.
Note:
Electrical booster is only applicable to some modules.
• Range of outdoor ambient temperature at which cold
weather function starts is −30°C to −10°C (default −15°C).
• System shall automatically return to routine operation. This
will happen when the outdoor temperature rises above the
selected temp. for this specific mode of operation.
Smart grid ready
In DHW or heating operation, the commands in the table
below can be used.
IN11
IN12
Meaning
OFF (open) OFF (open) Normal operation
ON (short) OFF (open) Switch-on recommendation
OFF (open) ON (short)
Switch-off command
ON (short) ON (short) Switch-on command
B-251
Water to Water Heat Pump (WTW)
7
Cylinder
unit/
Hydrobox/GSHP/WTW
Cylinder
unit/
Hydrobox/GSHP/WTW
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