4 Installation
Installation manual
11
08SU EHVH08~16SU26CB6W
Daikin Altherma – Low temperature split
4P449980-1B – 2016.11
4.5.4
To connect the backup heater power
supply
CAUTION
To guarantee the unit is completely earthed, always
connect the backup heater power supply and the earth
cable.
The backup heater capacity can vary, depending on the indoor unit
model. Make sure that the power supply is in accordance with the
backup heater capacity, as listed in the table below.
Backup
heater type
Backup
heater
capacity
Power
supply
Maximum
running
current
Z
max
(Ω)
*6W
3 kW
1~ 230 V
13 A
—
6 kW
1~ 230 V
26 A
(a)(b)
—
6 kW
3~ 230 V
15 A
—
6 kW
3N~ 400 V
8.6 A
—
(a)
Equipment complying with EN/IEC 61000-3-12 (European/
International Technical Standard setting the limits for
harmonic currents produced by equipment connected to
public low-voltage systems with input current >16 A and
≤75 A per phase.).
(b)
This equipment complies with EN/IEC 61000‑3‑11
(European/International Technical Standard setting the
limits for voltage changes, voltage fluctuations and flicker in
public low-voltage supply systems for equipment with rated
current ≤75 A) provided that the system impedance Z
sys
is
less than or equal to Z
max
at the interface point between the
user's supply and the public system. It is the responsibility
of the installer or user of the equipment to ensure, by
consultation with the distribution network operator if
necessary, that the equipment is connected only to a
supply with a system impedance Z
sys
less than or equal to
Z
max
.
1
Connect the backup heater power supply. For *6W models, a
4‑pole fuse is used for F1B.
2
If required, modify the connections on terminals X6M and X7M.
Backup heater
type
Connections to
backup heater power
supply
Connections to
terminals
3 kW 1~ 230 V
(*6W)
F1B
L
N
L
N
1 2 3 4
6 7 8
5
X6M
X7M
6 kW 1~ 230 V
(*6W)
1 2 3 4
6 7 8
5
X6M
X7M
Backup heater
type
Connections to
backup heater power
supply
Connections to
terminals
6 kW 3~ 230 V
(*6W)
F1B
L1 L2 L3
L1 L2 L3
1 2 3 4
6 7 8
5
X6M
X7M
6 kW 3N~ 400 V
(*6W)
F1B
L1 L2 L3
L1 L2 L3
1 2 3 4
6 7 8
5
X6M
X7M
3
Fix the cable with cable ties to the cable tie mountings.
4
Configure the user interface for the respective power supply.
See
"5.2.2 Quick wizard: Standard" on page 16
.
During connection of the backup heater, miswiring is possible. To
detect possible miswiring, it is highly recommended to measure the
resistance value of the heater elements. Depending on the different
backup heater types, following resistance values (see table below)
should be measured. ALWAYS measure the resistance on the
contactor clamps K1M, K2M, and K5M.
3 kW
1~ 230 V
6 kW
1~ 230 V
6 kW
3~ 230 V
6 kW
3N~
400 V
K1M/1
K5M/13
52.9Ω
52.9Ω
52.9Ω
∞
K1M/3
∞
∞
∞
105.8Ω
K1M/5
∞
∞
∞
105.8Ω
K1M/3
K1M/5
26.5Ω
26.5Ω
26.5Ω
105.8Ω
K2M/1
K5M/13
∞
26.5Ω
26.5Ω
∞
K2M/3
∞
∞
∞
52.9Ω
K2M/5
∞
∞
∞
52.9Ω
K2M/3
K2M/5
52.9Ω
52.9Ω
52.9Ω
52.9Ω
K1M/5
K2M/1
∞
∞
∞
∞
Example measure resistance between K1M/1 and K5M/13:
K1M
K2M
K2M
1 3 5 13
2 4 6 14
K5M
1 3 5 13
2 4 6 14
1 3 5 13
2 4 6 14
Ω
Ω
