Midea 190RDN3-E, Installation And Owner'S Manual

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4
Installation & Owner‘s Manual
4. INSTALLATION
The circulating air for every unit should be more than 350m
3
/h. Make sure there is enough installation space. Refer outline dimensional drawing
(see Fig.3-1,Fig.3-2)
4.1 Water System Piping
3) Installation of the One Way Valve: The one way valve thread is
RC3/4”. It is used to prevent water from flowing backwards.
4) After conection of the water system piping work, turn on the cold
water inlet valve and hot water outlet valve and bleed all air from
the tank. When water flows 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 no any leakage.
5) If the inlet water pressure is less than 0.15MPa, a pump should be
installed at the water inlet.
To guarantee the safe usage of tank, a reducing valve should be
installed in the water inlet pipe if the water pressure exceeds
500kPa.
6) Condensate may leak from unit if drainage pipe is blocked, a
drainage pan is recommended as shown as following figure:
Fig.4-1
1) Installation of the water inlet or outlet pipes: The water inlet
＆
outlet thread is G3/4” (external thread). Pipes must be
heat-resistant and durable.
2) Installation of the pipe for PTR valve: The valve connecting
thread is RC3/4” ( internal thread). After installation, it must be
confirmed that the drainpipe outlet is exposed in the air. When
drainpipe is joint to the pressure relief orifice of this valve, it must
be confirmed that the flexible drainpipe is downwards vertically
and exposed in the air.
Handle
Drainage
pipe
Note:
Water temperature limiting valve
is recommended for mixing the
inlet cold water with outlet hot
water to prevent burns caused
by hot water
Water Outlet
User
water Inlet
Drain port
Tap
Water in
Shut off
Valve
Shut off
Valve
One Way
Valve
Barrel-drain
expansion tank for pressure
relief(recommended)
PTR Valve
Upper
Condensate Outlet
Lower
Condensate Outlet
Water Temperature
Limiting Valve
WARNING
EXPLOSION
● Do not dismantle the PTR Valve,
● Do not block off the Drainage pipe, it will
cause explosion and injury.
CAUTION
● Piping water system as the above figure. In case of installing
where outside temperatures fall below 5
℃
, insulation must be
provided for all hydraulic components.
● The PTR Valve should be operated every
6 month to make sure that there is no
restriction of the valve. Please 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.