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3. INSTALLATION
3.1 Water System Piping
Accessories
Shut-off Valve
The switch acts to cut off the water path.
One Way Valve
One-way check to prevent backflow in the water line. Must be installed, accessories factory matched.
Expansion tank
Maintains constant water supply pressure.
Temp limiting valve
Outgoing water temperature is too high for mixing.
Water inlet or outlet pipes: The spec of the water inlet or outlet thread
is RC3/4" (external thread). Pipes must be heat-insulated well.
1)
Installation of the pipe for PTR valve: The spec of the valve
connecting thread is RC3/4" (internal thread). After installation, it
must be confirmed that the drainpipe outlet is exposed in the air.
CAUTION
Piping water system as the above figure. In
case of installing it at a place where outside
temperature below freezing point, insulation
must be provided for all hydraulic components.
The handle of PTR valve should be pulled out
once per half a year to make sure that there is
no jam of the valve.
Please beware of burn, beware of the hot
water from the valve.
The drainage pipe should be
well insulated in order to
prevent water inside pipe from
freezing in cold weather.
There is a risk of freezing if the tank is located
in an ambient temperature below 0°C. To
avoid freezing the water tank, empty the tank
without powering it up. (the unit stays
energized to protect the tank to a certain
extent).
Safety
Valve Pipe
DHW
ICON
Drain pipe
Barrel-drain
Function
Handle
Drainage
pipe
09
NOTE:
The temperature limiting
valve is required on the
hot water usage terminal.
One Way Valve
5L-Expansion Tank for tank
(if required)
Installation Requirements
Must be installed, selected according to the water pipe diameter.
Recommended installation, optional according to the specification of 5L.
Must be installed, selected according to the water pipe diameter.
WARNING
Do not dismantle the PTR Valve.
Do not block off the drainage pipe.
It will cause explosion and injury, if
do not comply with the above
instruction.
EXPLOSION
2)
Installation of the One Way Valve: The spec of the One Way
Valve thread in accessories is RC3/4". It is used to prevent
water from flowing backwards.
3)
After water system piping work, turn on the cold water inlet
valve and hot water outlet valve and start effusing the tank.
When water flow smoothly out from water outlet pipe(tap water
outlet), the tank is full, turn off all valves and check pipeline to
make sure there is not any leakage.
4)
If the inlet water pressure is less than 0.15MPa, a pump should
be installed at the water inlet.
For guarantee the safety usage of tank at the condition of water
supply pressure higher than 0.65MPa, a reducing valve should
be installed at the water inlet pipe.
5)
Condensate may be leaked from unit if drainage pipe is blocked
or unit operates in high humidity environment, a drainage pan is
recommanded as shown as following figure:
Max.22mm
50mm larger than the dia. of unit
User
Temp limiting valve
Tap
Water
Shut-off Valve
Heat Pump
Water Heater
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