Daikin Altherma EHFH-D3V - To Connect the Changeover to External Heat Source; To Connect the Power Consumption Digital Inputs

6 Electrical installation
Installation manual
16
EHFH03S18D
Daikin Altherma 3 R F
4P596803-1D – 2022.08
A
Y27
B
A
B
7 9
X2M
A4P
Y2YC
X1M
ab
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.
6.3.9 To connect the changeover to external
heat source
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 "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 changeover to external heat source cable to the
appropriate terminals as shown in the illustration below.
A
X1X2
LN
B
A
B
A4P
X2M
X1
a
X2
a Installation of EKRP1HBAA is required.
3 Fix the cable with cable ties to the cable tie mountings.
6.3.10 To connect the power consumption digital
inputs
Wires: 2 (per input signal)×0.75mm²
Power limitation digital inputs: 12VDC / 12mA detection
(voltage supplied by PCB)
[A.6.3] Pwr consumpt. control
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 power consumption digital inputs cable to the
appropriate terminals as shown in the illustration below.