To Connect The Changeover To External Heat Source - Daikin Altherma EHFH03S18D 3V Series Installer's Reference Manual

9.3.9 To connect the changeover to external heat source

ERLA03D + EHFH03S18D
Daikin Altherma 3 R F
4P596806-1C – 2022.09
A
B
A
B
a Installation of EKRP1HBAA is required.
b Prewiring between X2M/7+9 and Q1L (= thermal protector backup heater). Do NOT
change.
3 Fix the cable with cable ties to the cable tie mountings.
INFORMATION
Bivalent is only possible in case of 1 leaving water temperature zone with:
▪
room thermostat control, OR
▪
external room thermostat control.
Wires: 2×0.75 mm²
Maximum load: 0.3 A, 250 V AC
Minimum load: 20 mA, 5 V DC
[A.2.2.6.1] Ext. backup heat src
1 Open the following (see
1 Top panel
2 Upper front panel
3 Upper switch box cover
2 Connect the changeover to external heat source cable to the appropriate
terminals as shown in the illustration below.
7 Y2
7 9
X2M
b
"7.2.4 To open the indoor
9 Electrical installation
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A4P
a
4
unit" [ 62]):
1
Installer reference guide
3
2
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