Hitachi RCI Service Manual page 109

3 Piping work and
refrigerant charge
6 Place the insulating material around the drain connection.
Drain hose connection
The correct position for the drain hose connection is shown below.
Prepare a polyvinyl chloride (PVC) pipe with an outer diameter of
26 mm.
The drain hose must have a gradient of 1% (1/100) to 4% (1/25).
The drain hose cannot be installed on an upwards line, not even
on one section of the installation. In this case, the condensate water
accumulates at the lowest point immediately before the raised
section of the installation.
Seal the connection using waterproof chloride sealing material.
Insulate the connection part carefully.
Secure the drain pipe to the connection part using the clamp supplied.
C A U T I O N
• Do not apply too much force when making the drain hose connection as this could damage it.
• Do not use bent or twisted drain pipes as these will cause water leaks.
Insulate the drain pipe and suspend it individually as indicated in
the figure.
C A U T I O N
• Do not apply adhesive between the drain hose connection
and the drain hose.
• Do not install the condensate discharge pipe next to the
gas refrigerant pipes. Any accumulated water could freeze
and block the discharge system.
Check the correct working order of the drainage system.
97
SMGB0063 rev. 1 - 10/2010
Sealing material
Cap
Insulating material:
Drain pipe
(field-supplied)
Clamp
PVC pipe
(outer diameter 26 mm)
Clamp
Clamp
Rear
3
Drainage gradient
Clamp
Rear