7 Installation
Installer reference guide
44
EWAQ+005BAVP
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P492900-1 – 2017.06
Backup heater
type
Routing
*9W
a
b
a
Low voltage wiring
b
High voltage wiring
3
Fix the wiring with cable ties to the cable tie mountings.
NOTICE
The distance between the high voltage and low voltage
cables should be at least 25 mm.
7.8.20
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.
Depending on the model, the backup heater capacity can vary. 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
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 connection on terminal X14M.
Backup heater
type
Connections to
backup heater power
supply
Connections to
terminals
3 kW 1~ 230 V
(*3V)
L N
L N
F1B
—
3 kW 1~ 230 V
(*9W)
6 kW 1~ 230 V
(*9W)
L
L
N
N
F1B
1 2 3 4 5 6
X14M
6 kW 3N~ 400 V
(*9W)
9 kW 3N~ 400 V
(*9W)
F1B
L1 L2 L3
1 2 3 4 5 6
X14M
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.
