74
Installation
8.1.8.4.2
Safety device
1 Temperature pressure valve
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.
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
gas is released, releasing sound will be heard.
Temperature pressure valve is used to prevent too high
temperature in DHW tank (> 94°C, 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 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 “8.1.9.3.3 Wiring of DHW”.
Do not install DHW electric heater without temperature
protection device.
8.1.8.4.3
DHW tank installation
Recommend installing this equipment to balcony or outdoor at
temperature from 0°C to 43°C.
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.
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.
contaminated by impurities.
Install DHW tank
(1) Check DHW tank for complete accessories.
(2) When mounted on ground, ensure the bottom of DHW
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
be installed to reach the inner wall of the DHW tank and
keep in good contact with it.
Water proof
cable gland
Outer wall of the
DHW tank
Inner wall of
the DHW
tank
DHW tank thermistor
Thermal grease
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