To Connect The Safety Thermostat (Normally Closed Contact) - Daikin ETVZ16S23EA9W Installation Manual

6 Electrical installation
A
B
A
B
5 4 3
X801M
a Installation of EKRP1AHTA is required.
3 Fix the cable with cable ties to the cable tie mountings.
6.3.10 To connect the safety thermostat
(normally closed contact)
1 Open the following (see "4.2.1 To open the indoor
1 Top panel
2 User interface panel
3 Upper switch box cover
Main zone
Wires: 2×0.75 mm²
—
2 Connect the safety thermostat (normally closed) cable to the
appropriate terminals as shown in the illustration below.
Installation manual
18
5 4 3 2 1
1 2
A8P
a
unit" [ 4 6]):
1
A
B
A
B
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
3
temperature in the main zone is too high, the contact will
2
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.
—
4 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.
Q3L
1 2
1 2
X5M
ETVZ16S18+23EA6V+9W
Daikin Altherma 3 H HT F
4P644730-1 – 2021.02