Hisense Hi-Therma Serie Manual De Instalación Y Mantenimiento página 32

SPACE HEATING AND DHW
8.4.2 Safety device
1 Temperature pressure valve
A temperature pressure valve which fit with local national
requirements should be installed together with DHW tank to
avoid the excessive higher temperature and pressure.
•
Temperature pressure valve must be tightly connected with
drainage pipe. Drainage pipe must be connected as shown
below and introduced to building down corner (The water
temperature in drainage pipe may be high, note burns).
•
Temperature pressure valve in DHW tank can not be
connected for other purposes.
•
Check temperature pressure valve once half a year. When
checking, open temperature pressure valve handle (seen
below), temperature pressure valve will smoothly drain water
out. The water temperature may be high, note burns. Reset
after it is errorless. If drainage fails, contact local dealer for
repair.
•
Temperature pressure valve and its drainage pipe must keep
smooth and not blocked.
!
C A U T I O N
• If DHW tank is not used for more than 2 weeks, a certain amount of
hydrogen will gather in DHW tank. It is recommended to open
temperature pressure valve handle or water outlet faucet for several
minutes to release hydrogen. However, do not open hot water faucet
in dishcleaning machine and washing machine, etc. When hydrogen is
released, do not make open flame or operate other electrical
apparatus. When gas is released, releasing sound will be heard.
Temperature pressure valve is used to prevent too high temperature
•
in DHW tank ( ＞ 94ºC, recommended) and water pressure ( ＞
0.85MPa, recommended).
2 Temperature protection switch
•
When using the DHW electric heater, an Auto Restore
Temperature Protection Switch (THe2) has to be installed to
prevent the DHW temperature from being heated
uncontrollable. When DHW temperature exceeds the
protection value, the temperature protection switch opens,
and auto restores when DHW temperature reduces below
the protection value. The protection value can be selected
according to temperature requirement of DHW. The
recommended protection value is 80°C.
•
Temperature Protection Switch / Temperature fuse (THe1) is
connected in the DHW electric heater power supply circuit,
which can directly cut off the power supply of DHW electric
heater when DHW temperature exceeds the protection value.
The recommended protection value is 90 °C.
•
The detail wiring diagram of DHW tank is shown in section
"9.3.3 Wiring of DHW".
!
C A U T I O N
• Do not install DHW electric heater without temperature protection device.
• Electrical box cover must be opened by qualified electrician.
Power off before open electrical box cover.
8.4.3 DHW tank installation
?
N O T E
• Recommend installing this equipment to balcony or outdoor at
temperature from 0ºC to 43 ºC.
• DHW tank is mounted near floor drain to connect temperature
pressure valve drainage pipe.
• Do not install DHW tank in place with corrosive gas.
•
Installation location is free from frosting.
• Installation location must bear weight of DHW tank containing water.
• Ensure dimension of water pipe is above 1 inch (recommend DN40
water pipe), provide enough volume to pipeline and reduced
resistance in pipeline system.
• DHW tank is located in a place that is convenient for repair and
ensure electrical box is open.
•
No accumulated water around installation location.
• Arrange filter at water inlet pipe, preventing domestic water
contaminated by impurities.
•
Ensure DHW tank is full of water before energizing.
Install DHW tank
1) Check DHW tank for complete accessories.
2) When mounted on ground, ensure the bottom of DHW tank
is flat and vertically. If mounted in bath room where water
exists, recommend installing on a foundation higher than
ground, preventing the bottom being soaked by water.
3) To ensure the measurement accuracy, the DHW tank
thermistor should be coated with thermal grease. The water
proof cable gland (field supplied) is recommended to secure
the sensor firmly. The DHW tank sensor must be installed to
reach the inner wall of the DHW tank and keep in good
contact with it.
Outer wall of the
DHW tank
Water proof
cable gland
20
Inner wall of
the DHW
tank
DHW tank thermistor
Thermal grease