14 Technical data
Installer reference guide
82
EGSQH10S18AA9W
Daikin Altherma ground source heat pump
4P351748-1D – 2016.02
For connection with M2S
Quantity of wires
3G
Type of wires
Note
(a)
and Note
(c)
For connection with user interface
Quantity of wires
2
Type of wires
0.75~1.25 mm (maximum length 500 m)
For connection with optional FWXV (demand input
and output)
Quantity of wires
4
Type of wires
Minimum 0.75 mm
2
(100 mA)
(a)
Select diameter and type according to national and local regulations.
(b)
Depends on the type of thermostat. See the installation manual of the thermostat.
(c)
Voltage: 230 V / maximum current: 100 mA / minimum 0.75 mm
2
14.7
Operation range
14.7.1
Operation range: Indoor unit
Space heating
25
20
15
5
10
0
–5
–10
0
10
20
30
40
50
70
4D083081-1A
A (°C)
B (°C)
60
A
Entering brine temperature
B
Leaving condenser water temperature
Only backup heater operation if the set point is <24°C.
Heat pump operation (assisted by backup heater if capacity shortage)
Heat pump + backup heater operation
Protect against freezing by adding anti-freeze to brine side. See also remark.
Remark:
By default settings, the unit will allow operation with
entering brine temperatures to –5°C. As a result, the brine freezing
temperature may not be higher than –15°C. For water – ethanol
mixtures this corresponds to 29% ethanol (by mass), for water –
propylene glycol mixtures this corresponds to 40% propylene glycol
(by volume).
If the freezing temperature of the medium is higher than –15°C, then
protection level of unit MUST be increased by field setting.
Refer to the installation manual and/or installer reference guide for
instructions how to set a different freeze temperature of the medium
(Tf) in the controller.
The unit will NOT operate at an entering brine temperature lower
than Tf+10K.
Tf=changeable between 0°C and –15°C.
