7 Installation
Installer reference guide
42
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1 – 2015.01
CAUTION
If the indoor unit has a tank with a built‑in electrical booster
heater, use a dedicated power circuit for the backup heater
and booster heater. NEVER use a power circuit shared by
another appliance. This power circuit MUST be protected
with the required safety devices according to the applicable
legislation.
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)
*3V
3 kW
1~ 230 V
13 A
—
*9W
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
—
9 kW
3N~ 400 V
13 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 *3V models, a
double‑pole fuse is used for F1B. For *9W 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
(*3V)
—
3 kW 1~ 230 V
(*9W)
F1B
L
N
L
N
1 2 3 4
6 7 8
5
X6M
X7M
6 kW 1~ 230 V
(*9W)
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
(*9W)
F1B
L1 L2 L3
L1 L2 L3
1 2 3 4
6 7 8
5
X6M
X7M
6 kW 3N~ 400 V
(*9W)
9 kW 3N~ 400 V
(*9W)
F1B
L1 L2 L3
L1 L2 L3
1 2 3 4
6 7 8
5
X6M
X7M
Special remark for fuses:
Special remark for terminals:
As mentioned on the table above, the connections on the terminals
X6M and X7M need to be changed to configure a backup heater.
Refer to the illustration below as a caution about handling the
terminals.
3
Fix the cable with cable ties to the cable tie mountings.
4
Configure the user interface for the respective power supply.
See
"8.2.2 Quick wizard: Standard" on page 48
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
