– 21 –
EN
Hydro Unit
Installation Manual
Electrical Installation
WARNING
• Ensure electrical circuits are isolated before commencing the electrical installation.
• The electrical installation must be completed by a qualified electrician.
• The electrical installation must comply to all Local, National and International electrical installation regulations.
• This product must be earthed in accordance with Local, National and International electrical installation regulations.
CAUTION
• The Hydro Unit must be connected to a dedicated power supply for the back up heater circuit.
• The electrical supply must be protected by a suitably sized over current protection device (fuse, MCB etc) and an
earth leakage protection device.
• The Hydro Unit must be connected to the mains power supply using a isolating switch which disconnects all poles
and has a contact separation of at least 3 mm.
• The cord clamps, attached to the Hydro Unit, must be used to secure the electrical cables.
• Wrong connection of electrical cables may result in electrical component failure or fire.
• Ensure the electrical cables are sized in accordance with the installation instructions.
Power line
1
2
3
1
2
3
1
2
1
2
L
N
L
N
TB03
TB01
L
N
TB02
TB02
N
L1
L1
L3
L2
Backup heater
230 V ~ (3 kW type)
Backup heater
400 V 3N ~ (6.9 kW type)
Input power
230 V ~
50 Hz
Input power
400 V 3N ~
50 Hz
Leakage
breaker 30 mA
Leakage
breaker 30 mA
Hot water cylinder
Input power for
cylinder heater
230 V ~ 50 Hz
Leakage
breaker
30 mA
Hydro unit
Outdoor unit
Leakage
breaker
30 mA
Input power
230 V ~
50 Hz
▼
Fig. 7-19
20-EN
Summary of Contents for ESTIA HWS-1402XWHM3-E
Page 44: ...EF99804301 3 ...
