Drain Piping - Hitachi RPIH-4.0FSRE Manuel D'installation Et De Fonctionnement

DRAIN PIPING

6 DRAIN PIPING
6.1 GENERAL INFORMATION
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C A U T I O N
• Do not create an upper-slope or rise for the drain piping, since drain
water will flow back to the unit and leakage to the room will occur
when the unit operation is stopped.
INCORRECT
-
Incorrect: upward slope
Incorrect: rising part
• Do not connect the drain pipe with sanitary or sewage piping or any
other drainage piping.
• When the common drain piping is connected with other indoor units,
the connected position of each indoor unit must be higher than the
common piping. The pipe size of the common drain pipe must be
large enough according to the unit size and number of unit.
CORRECT
-
Š Pump system
1/25 to 1/100
Down-Slope
Drain piping of unit side Common drain piping (VP30)
(Down slope from rising part)
• Drain piping will require insulating if the drain is installed in a location
where condensation forming on the outside of drain pipe may drop
and cause damage. The insulation for the drain pipe must be selected
to insure vapor sealing and prevent condensation forming.
• Drain trap should be installed next to indoor unit. This trap must be
designed to good practice and be checked with water (charged)
and tested for correct flow. Do not tie or clamp the drain pipe and
refrigerant pipe together.
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N O T E
• Install drainage in accordance with national and local codes.
• Pay attention to the thickness of the insulation when insulation is
performed. If it is too thick, piping can not be installed in the unit.
• If there is excessive clearance between the drain pipe connection
and the drain hose, add a sealing material between both parts in
order to fit and not deform the drain hose.
10 PMML0529 rev.1 - 02/2021
Min. 100mm
(higher as possible)
Vinyl chloride pipe (VP25)
This drain piping
shall be separating
from others pipes
After performing drain piping work and electrical wiring, check to
ensure that water flows as in the following procedure:
RPIH Checking with the standard Drainage (drain pump)
• Switch ON the power supply.
• Full the drain pan with approximately 1.2 liters of water. Then
float switch stops the system automatically. In this operation
the drain pump do not stops.
• Switch OFF the power supply after.