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6 Electrical installation
6.3.10
To connect the safety thermostat
(normally closed contact)
Wires: 2×0.75 mm²
Maximum length: 50 m
Safety thermostat contact: 16 V DC detection (voltage
supplied by PCB). The voltage-free contact shall ensure the
minimum applicable load of 15 V DC, 10 mA.
—
1 Open the following (see
"4.2.1 To open the indoor
1 Top panel
2 User interface panel
3 Upper switch box cover
2 Connect the safety thermostat (normally closed) cable to the
appropriate terminals as shown in the illustration below.
Note: The jumper wire (factory-mounted) must be removed from the
respective terminals.
A
B
A
B
3 Fix the cable with cable ties to the cable tie mountings.
NOTICE
Make sure to select and install the safety thermostat
according to the applicable legislation.
In any case, to prevent unnecessary tripping of the safety
thermostat, we recommend the following:
▪ The safety thermostat is automatically resettable.
▪ The safety thermostat has a maximum temperature
variation rate of 2°C/min.
▪ There is a minimum distance of 2 m between the safety
thermostat and the 3‑way valve.
NOTICE
Error. If you remove the jumper (open circuit) but do NOT
connect the safety thermostat, stop error 8H-03 will occur.
Installation manual
20
6.3.11
This topic describes 2 possible ways to connect the indoor unit to a
Smart Grid:
▪ In case of low voltage Smart Grid contacts
▪ In case of high voltage Smart Grid contacts. This requires the
installation of the Smart Grid relay kit (EKRELSG).
The 2 incoming Smart Grid contacts can activate the following Smart
Grid modes:
unit" [ 4 6]):
1
3
2
The use of a Smart Grid pulse meter is not mandatory:
If Smart Grid pulse meter is...
Used
Q4L
([9.A.2] Electricity meter 2 ≠ None)
13
14
Not used
([9.A.2] Electricity meter 2 = None)
In case of low voltage Smart Grid contacts
The wiring of the Smart Grid in case of low voltage contacts is as
follows:
3
4
13 14
S4S
X5M
1 Open the following (see
To connect a Smart Grid
Smart Grid contact
Smart Grid operation mode
1
2
0
0
Free running
0
1
Forced off
1
0
Recommended on
1
1
Forced on
Wires (Smart Grid pulse meter): 0.5 mm²
Wires (low voltage Smart Grid contacts): 0.5 mm²
[9.8.4]=3 (Benefit kWh power supply = Smart Grid)
[9.8.5] Smart Grid operation mode
[9.8.6] Allow electrical heaters
[9.8.7] Enable room buffering
[9.8.8] Limit setting kW
X5M
5
6
9
10
13
14
a
2
1
S11S
S10S
a
Jumper (factory-mounted). If you also connect a safety
thermostat (Q4L), replace the jumper with the safety
thermostat wires.
S4S
Smart Grid pulse meter
1
Low voltage Smart Grid contact 1
/S10S
2
Low voltage Smart Grid contact 2
/S11S
"4.2.1 To open the indoor
1 Top panel
2 User interface panel
3 Upper switch box cover
Then [9.8.8] Limit
setting kW is...
Not applicable
Applicable
unit" [ 4 6]):
1
3
2
ETVH16SU18+23E
Daikin Altherma 3 H HT F
4P644729-1E – 2023.10
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