Daikin Altherma EHFH-D3V - To Connect the Safety Thermostat (Normally Closed Contact); After Connecting the Electrical Wiring to the Indoor Unit

6 Electrical installation
Installation manual
17
EHFH03S18D
Daikin Altherma 3 R F
4P596803-1D – 2022.08
1245
S6S S7S S8S
S9S
3
A
B
A
B
A8P
X801M
a
1 2 3 4 5
a Installation of EKRP1AHTA is required.
3 Fix the cable with cable ties to the cable tie mountings.
6.3.11 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.
[A.2.1.6]=3 (Forced off contact = Thermostat)
1 Open the following (see "4.2.1To open the indoor unit"[45]):
1 Top panel
1
2
3
2 Upper front panel
3 Upper switch box cover
2 Connect the safety thermostat (normally closed) cable to the
appropriate terminals as shown in the illustration below.
A
10
Q4L
9
B
A
B
X5M
9 10
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.
INFORMATION
ALWAYS configure the safety thermostat after it is
installed. Without configuration, the unit will ignore the
safety thermostat contact.
INFORMATION
The preferential kWh rate power supply contact is
connected to the same terminals (X5M/9+10) as the safety
thermostat. Thus, the system can have EITHER
preferential kWh rate power supply OR a safety
thermostat.
6.4 After connecting the electrical
wiring to the indoor unit
To prevent water ingress to the switch box, seal the low voltage
wiring intake using the sealing tape (delivered as accessory).