Drain Piping Work - Daikin FXCQ20MVE Installation Manual

Table 4
Pipe size Further tightening angle
 6.4 (1/4")
60 to 90 degrees
 9.5 (3/8")
60 to 90 degrees
 12.7 (1/2")
30 to 60 degrees
 15.9 (5/8")
30 to 60 degrees
7.

DRAIN PIPING WORK

Rig the drain pipe as shown below and take measures
against condensation. Improperly rigged piping could lead
to leaks and eventually wet furniture and belongings.
(1) Carry out the drain piping
• The diameter of the drain pipe should be greater than or
equal to the diameter of the connecting pipe (vinyl tube;
pipe size: 25 mm; outer dimension: 32 mm).
• Keep the drain pipe short and sloping downwards at a
gradient of at least 1/100 to prevent air pockets from
forming.
• If the drain hose cannot be sufficiently set on a slope, exe-
cute the drain raising piping.
• To keep the drain hose from sagging, space hanging
wires every 1 to 1.5 m.
1-1.5m
CAUTION
Setting the unit at an angle opposite to the drain piping
might cause leaks.
• Use the drain hose and the metal clamp.
Insert the drain hose into the drain socket, up to the tape.
Tighten the clamp until the screw head is less than 4 mm
from the hose.
• Wrap the attached sealing pad over the clamp and drain
hose to insulate.
• Insulate the drain hose inside the building.
Metal clamp
Tape
English
Recommended arm length
of tool
Approx. 150mm
Approx. 200mm
Approx. 250mm
Approx. 300mm
1-1.5m
Hanger bracket
Drain hose
Metal clamp
(accessory)
 PRECAUTIONS FOR DRAIN RAISING PIPING 
• Install the drain raising pipes at a height of less than
310 mm.
• Install the drain raising pipes at a right angle to the indoor
unit and no more than 300 mm from the unit.
Ceiling slab
300mm
Metal clamp (accessory)
• If converging multiple drain pipes, install according to the
procedure shown below.
Select converging drain pipes whose gauge is suitable for
the operating capacity of the unit.
(2) After piping work is finished, check drainage flows
smoothly.
• Open the water inlet lid, add approximately 2.5 liter of
water gradually and check drainage flow.
Water inlet
Refrigerant
piping
[ WHEN ELECTRIC WIRING WORK IS FINISHED ]
• Check drainage flow during COOL running, explained under
"TEST OPERATION."
Large sealing pad
(accessory)
4mm
1-1.5m
Hanger bracket
Adjustable
310mm)
Drain raising pipe
Drain hose (accessory)
T-joint converging drain pipes
Portable pump
Water inlet lid
Close
Open
Bucket
7