Daikin Altherma 3 R F EHVZ04S18E 6V Series - Page 109

9 | Electrical installation
Installer reference guide
109
ERGA04~08EAV3(A) + EHVZ04+08S18+23EA6V+9W
Daikin Altherma 3 R F
4P629093-1 – 2020.08
A
2
Q3L
1
B
A
B
X5M
1 2
3 Fix the cable with cable ties to the cable tie mountings.
INFORMATION
Installation of a safety thermostat (field supply) is required for the main zone,
otherwise the unit will NOT operate.
NOTICE
A safety thermostat MUST be installed on the main zone to avoid too high water
temperatures in this zone. The safety thermostat is typically a thermostatically
controlled valve with a normally closed contact. When the water temperature in the
main zone is too high, the contact will open and the user interface will show a 8H‑02
error. ONLY the main pump will stop.
Additional zone
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.
[9.8.1]=3 (Benefit kWh power supply = Safety thermostat)
4 Connect the safety thermostat (normally closed) cable to the appropriate
terminals as shown in the illustration below.