Hisense Hi-Therma Serie Manual De Instalación Y Mantenimiento página 38

ELECTRICAL AND CONTROL SETTINGS
9.3.3 Wiring of DHW
!
C A U T I O N
The electric heater of the DHW tank needs to meet the relevant
requirements of local laws and regulations. It is necessary to protect it
through a temperature fuse and a temperature protection switch.
1 Electric heater power ≤ 3 kW.
Power line connection should give concern to live line and null
line, and be grounded strictly.
2 Electric heater power ＞3 kW.
When the capacity of the electric heater is greater than 3 kW,
the terminal HL/HN only provides control signals to control the
ON/OFF of the AC contactor.
Codes Indications
DHW EH
DHW electric heater assembly
EH DHW electric heater
Temperature protection switch
/ Temperature fuse
Connected in the DHW electric heater
THe1
power supply circuit, directly cut off the
power supply of DHW electric heater
when DHW temperature exceeds the
protection value.
Temperature protection switch
(Auto restore)
When DHW temperature exceeds the
protection value, the temperature
THe2
protection switch open, and auto
restore when DHW temperature reduce
below the protection value.
The unit can detect this temperature
protection switch is open and cuts off
the power supply DHW electric heater.
AR4 AC contactor (repeater)
FU Fuse
Recommended
parameters
Protection value
90 °C
Protection value
80 °C
Selection according to
EH (DHW) specifications
26
!
C A U T I O N
Electrical wiring must be performed by professional technician accord-
ing to national regulations.
• Correctly mount cable water proof head and electrical box cover,
preventing short circuit caused by water intruding into electrical box.
To install the DHW electric heater which power is ≤ 3kW, power line
•
requirements are shown below:
Power
Source
DHW tank
220V-240V
pow er
~ 50Hz
supply
DHW tank
220V-240V
temperature
~ 50Hz
switch
* Code designation 60245 IEC 57
Installation of on-site wire must complies with applicable legislation.
a.
b. When power line is connected in series, total current value selects
power line specification.
•
Thermistor of DHW tank is weak current signal, preventing mixed with
strong current signal.
•
The DHW tank must have temperature protection devices recom-
mended in this section to ensure the power supply of DHW electric
heater can be cut off in time when the DHW temperature is too high.
Power Source
Rated
Cable Size
Current
EN60 335-1
2
15A
3 × 2.5mm
2
- 2 × 0.75~2.5mm