Drain Pipe - Hitachi RPIH-3.0HNAUNQ Operation, Installation, And Maintenance Manual

Excessive and inadequate refrigerant is a
leading cause of system anomaly. Please
inject the right amount of refrigerant.

6. Drain Pipe

(1) See Fig. 6.1 for connection point of drain
pipe.
(2) Find a PVC pipe with an outside diameter of
32mm.
(3) Fix the PVC pipe to drain pipe through
adhesive and factory-supplied clamp. The
downward inclination of drain pipe is
1/25~1/100.
(4) Make thermal insulation after the proper
connection of drain pipe.
(When a drain pump DUPI-131Q#E
\DUPI-361Q#E is ordered)
Pipe Support
(Field Supplied)
90º Bend (VP25)
(Field Supplied)
Drain Lift Pipe (PVC Pipe, VP25)
(Field Supplied)
Drain Pipe (L300)
Indoor Unit
(Accessory)
Rubber Stopper
Water Pan
(Accessory)
Drain Pump
(When no drain pump is ordered)
Electric Box
1/25~1/100 Downward Inclination
Thermal Insulation Material
Incorrect: Slope Up
Indoor Unit
Elevated Portion
1/25~1/100 Downward Inclination
Shared Drain Pipe
Fig. 6.1 Drain Pipe
Drain Pipe (PVC Pipe, VP25)
(Field Supplied)
1/25~1/100 Downward Inclination
Thermal Insulation Material
(Field Supplied)
Adhesive (Seal)
Drain Pipe
Pipe Clamp
PVC Pipe (Field Supplied)
Incorrect
Connecting Drain Pipe
Correct
Drain pipes shall be separated from other pipes
Where the relative humidity of air inlet or
ambient air exceeds 80%, an auxiliary drain pan
shall be fabricated at installation site and placed
under the indoor unit, as shown in Fig. 6.2.
Auxiliary Water Pan
(Field Supplied)
Fig. 6.2 Water pan
(1) The drain pipe installed shall slope down;
otherwise, the condensate may flow back and
leak into the room when the indoor unit is turned
off.
(2) The drain pipe shall not be connected with sewage
pipe or other drain pipes.
(3)
Where the main drain is connected to other
indoor units, each indoor unit must be higher than
the main. Select drain pipes in ample size
depending on the refrigerating capacity and
quantity of indoor units.
Check if water flows without obstruction following
(4)
the procedure shown below after the proper
connection of wires and drain pipes.
a.
Power on.
b.
Fill the water pan with 2L or 2.5L of water.
.
Check and ensure the water flows without
C
obstruction and no leakage exists. Pour 2L of
water if no water flows out of pipe end.
11
Indoor Unit
Drain Outlet