To Connect The Safety Thermostat (Normally Closed Contact) - Daikin Altherma 3 R F Installer's Reference Manual

7.9.17 To connect the safety thermostat (normally closed contact)

ERGA04~08DAV3(A) + EHVZ04+08S18+23DA6V+9W7
Daikin Altherma 3 R F
4P618957-1 – 2020.03
X1M
5 3 4 1 2
X801M
a
A8P
a Installation of EKRP1AHTA is required.
2 Fix the cable with cable ties to the cable tie mountings.
Main zone
1 Connect the safety thermostat (normally closed) cable to the appropriate
terminals as shown in the illustration below.
X1M
2 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
3 Connect the safety thermostat (normally closed) cable to the appropriate
terminals as shown in the illustration below.
X2M
X5M
A5P
X2M
1 2
X5M
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