Daikin FXLQ-M Engineering Data page 23

EDUS39-600-F7_a
Not recommendable but in case of emergency
You must use a torque wrench but if one is not available,
you may follow the installation method mentioned below.
After the work is finished, make sure to check that
there is no gas leak.
When you keep on tightening the flare nut with a spanner,
there is a point where the tightening torque suddenly
increases. From that position, further tighten the flare nut at
the angle shown below:
Table 3
Further tightening
Pipe size
angle
φ 1/4"
60 to 90 degrees
φ 3/8"
60 to 90 degrees
φ 1/2"
30 to 60 degrees
φ 5/8"
30 to 60 degrees
7. DRAIN PIPING WORK
Install the drain pipe as shown below and take measures
against condensate. Improperly installed piping can
leak on furniture and belongings.
(1) Install the drain pip-
ing:
Connect the drain
hose (1) using the
attached hose and
parts, as shown in the
drawing to the right.
Piping process
inside unit
Tilt
• If converging multiple drain pipes, install according to the
procedure shown below.
Slope downwards at a gradient
of at least 1/100
Select converging drain pipes with gauges suitable for the
operating capacity of the unit.
(2) After piping work is finished, check that drainage flows
smoothly.
• Add approximately 1 liter of water slowly from the air
outlet and check drainage flow.
(3) Be sure to insulate all indoor pipes
FXLQ-M / FXNQ-M
(in.)
Recommended arm length
of tool
Approx. 5 7/8
Approx. 7 7/8
Approx. 9 13/16
Approx. 11 13/16
Drip pan
Metal clamp
(accessory) (2)
Drain hose
(accessory) (1)
2 or more
3/4 drain pipe
Cut to suitable length
(length : in.)
CAUTION
• Drain piping connections
Do not connect the drain piping directly to sewage pipes
that smell of ammonia. The ammonia in the sewage might
enter the indoor unit through the drain pipes and corrode
the heat exchanger.
• Keep in mind that water collecting on the drain pipe causes
blockage.
8. ELECTRIC WIRING WORK
8-1 GENERAL INSTRUCTIONS
• All field supplied parts and materials, electric works must
conform to local codes.
• Use copper wire only.
• Follow the WIRING DIAGRAM attached to the unit to wire
the outdoor unit, indoor units and the remote controllers.
For details on hooking up the remote controller, refer to the
INSTALLATION MANUAL OF REMOTE CONTROLELR.
• All wiring must be performed by an authorized electrician.
• This system consists of multiple indoor units. Mark each
indoor unit as unit A, unit B, and so forth, and be sure the
terminal block wiring to the outdoor unit and BS unit is prop-
erly matched. If controls wiring and piping between the
outdoor and indoor units are mismatched, a communica-
tions malfunction is likely. A circuit breaker capable of shut-
ting down the power supply to the entire system must be
installed.
• Be sure to ground the air conditioner.
DANGER
• Do not ground units to water pipes, telephone wires, or
lightning rods because incomplete grounding and lighting
strikes can cause a severe shock hazard resulting in
severe injury or death., Do not ground units to gas pipes
because a gas leak can result in an explosion leading to
severe injury or death.
8-2 ELECTRICAL CHARACTERISTICS
Units
Model Hz Volts
FXLQ12MVJU,
FXNQ12MVJU
208-
60
230
FXLQ18 · 24MVJU,
FXNQ18 · 24MVJU
MCA: Min. Circuit Amps (A); MFA: Max. Fuse Amps (A)
W: Fan Motor Rated Output (W); FLA: Full Load Amps (A)
8-3 SPECIFICATIONS FOR FIELD SUPPLIED
FUSES AND WIRE
Power supply wiring
Model
Field
fuses
Installation
Power
Fan motor
supply
Voltage
MCA MFA W
range
0.5 15 25
Max. 253
Min. 187
0.6 15 35
Remote controller wiring
Transmission wiring
Size Wire Size
FLA
0.4
0.5
22