Daikin VRV FXMQ24PBVJU Installation Manual page 10

CAUTION
• The drain piping will be clogged with water and water leakage
may result if the water is accumulated in the drain piping.
• Conduct drain-up piping work if the gradient is insuffi-
cient.
• Attach a support bracket at 3.3 to 4.9 ft (1 to 1.5 m)
intervals for the prevention of piping deflection.
3.3 - 4.9 ft
(1 -1.5 m)
Downward slope of at least 1/100
• Be sure to use the drain hose (2) and metal clamp (1).
Insert the drain hose (2) deep into the base of the
drain socket, and securely fasten the metal clamp (1)
within the taped part on the insertion front end of the
hose.
Be sure to fasten the screw of the metal clamp (1) until
the margin of the screw thread decreases to 3/16 in.
(4 mm) or less.
Metal clamp (1)
(accessory)
Tape
NOTE
Be sure to follow the instructions as below.
• Do not connect the drain piping directly to a sewer that
smells of ammonia.
The ammonia in the sewer may reach through the drain
piping and corrode the heat exchanger of the indoor unit.
• Do not bend or twist the provided drain hose (2) in order
not to impose excessive force on the hose. (Doing so
may result in water leakage.)
• Take the procedure shown in the following illustration to
perform concentrated drain piping.
Concentrated drain piping
Maintain a downward slope of at least
1/100 so that no air bank will be formed.
The drain piping will be clogged with water
and water leakage may result if the water is
accumulated in the drain piping.
English
Support bracket
Drain hose (2)
(accessory)
• The Socket for maintenance can be used for natural
drainage as shown below. As the drain pump operation
does not need for natural drainage, it can be disable by
field setting to reduce power consumption.
(Refer to Table 6)
• Select the diameter of the concentrated drain piping to
suit the capacity of equipment connecting to the concen-
trated drain piping.
Ceiling slab
12 in. (300 mm) max.
Metal clamp (1) (accessory)
Drain hose (2) (accessory)
Drain hose (2) (accessory)
Locate the drain hose horizontally
or with a little upward gradient.
If there is an air bank, noise may be generated
as a result of a water backflow when the drain
pump comes to a stop.
(2) Check the smooth draining of the piping on completion of
the installation of the piping.
[Before electrical work]
CAUTION
• A licensed electrical engineering technician must con-
duct electrical wiring work (including grounding work).
• If no licensed electrical engineering technician is avail-
able, take steps 3 and 4 after the test operation of the air
conditioner is finished.
1. Remove the control box cover, and connect the single-
phase electric wires to terminals L1 and L2 of the ter-
minal block and the ground wiring to the ground ter-
minal.
Perform wiring according to 10-1. CONNECTING
POWER SUPPLY, GROUND, REMOTE CONTROLLER,
AND TRANSMISSION WIRING in 10. WIRING EXAM-
PLE AND HOW TO SET THE REMOTE CONTROLLER.
Seal and insulate
the drain socket.
3.3 - 4.9 ft
(1-1.5 m)
Support bracket
Drain-up piping
(field supply)
Adjustable
(18-3/8 in. (467 mm) max.)
Horizontal or
upward slope
9