Daikin FXDQ20M9V3B9, Installation And Operation Manual

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Installation and operation manual
3
25M9V3B9
VRV System air conditioners
3P468515-3 – 12.2016
R
EFRIGERANT PIPING WORK
For refrigerant piping of outdoor unit, refer to the installation manual
supplied with the outdoor unit.
Before rigging tubes, check which type of refrigerant is used.
■
Use a pipe cutter and flare suitable for R410A.
■
Apply ether oil or ester oil around the flare portions before
connecting.
■
To prevent dust, moisture or other foreign matter from infiltrating
the tube, either pinch the end, or cover it with tape.
■
The outdoor unit is charged with refrigerant.
■
Be sure to use both a spanner and torque wrench together when
connecting or disconnecting pipes to/from the unit.
■
Refer to Table 1 for the dimensions of flare nut spaces and the
appropriate tightening torque. (Overtightening may damage the
flare and cause leaks.)
■
When connecting the flare nut, coat the flare both inside and
outside with ether oil or ester oil and initially tighten by hand 3 or
4 turns before tightening firmly.
Coat here with ether oil or ester oil
■
Check the pipe connector for gas leaks.
■
Be sure to insulate the gas pipe and the liquid pipe separately
with polyethylene foam insulation material (thermal
conductivity = 0.041~0.052 W/mK).
Table 1
D
RAIN PIPING WORK
Rig the drain piping as shown in figure and take measures against
condensation. Improperly rigged piping could lead to leaks and
eventually wet furniture and belongings.
1. Install the drain pipes.
• Keep piping as short as possible and slope it downwards so
that air may not remain trapped inside the pipe.
• Keep pipe size equal to or greater than that of the connecting
pipe (Vinyl pipe of 25 mm nominal diameter and 32 mm outer
diameter).
• Do not use a trap in the drain piping and never put the end of
the hose into water.
(See figure 2)
• If you extend the drain hose, always insulate it up to the
outdoor side with polyethylene foam insulation material (field
supply).
• To ensure a downward slope of 1:100, install hanging bars
every 1 to 1.5 m.
• If unifying multiple drain pipes, install the pipes as shown.
2. After piping work is finished, check if drainage flows
smoothly.
• Make sure that the drain hose is firmly connected.
• Pour some water into the drain pan to check if the water flows
smoothly.
When electric wiring work is finished
Check drainage flow during COOL running, explained in chapter
"Test operation".
When electric wiring work is not finished
■
Remove the switch box lid and connect the power supply and
remote controller to the terminals.
(See figure 7)
All field piping must be provided by a licensed refrigeration
technician and must comply with the relevant local and
national codes.
1 Torque wrench
2 Spanner
3 Piping union
4 Flare nut
Inside diameter Wall thickness
Gas pipe insulation 12–15 mm 8–10 mm
Liquid pipe insulation 8–10 mm 7–10 mm
NOTE For the gas pipe, use a polyethylene foam resistant to
a temperature of 110°C.
When inserting the refrigerant piping in the wall hole, take
care not to let dust or moisture come into the piping.
Protect the pipes with a cap or seal the pipe end
completely with tape.
Pipe gauge Tightening torque
Flare dimension A
(mm) Flare shape
Ø6.4
14.2~17.2 N•m
(144~176 kgf•cm)
8.7~9.1
Ø12.7
49.5~60.3 N•m
(504~616 kgf•cm)
16.2~16.6
1 2
4
3
R=0.4~0.8
45
° ±
2
90
°±
2
A
1 Hanging bar
1 Drain hose fixed to the indoor unit
2 Indoor side extension drain hose
3 Wall
4 Polyethylene foam
1 Power supply wiring
2 Wiring port
3 Indoor PC board
4 Power supply terminal board
5 Transmission wiring between units
6 Remote controller wiring
7 Terminal board for unit transmission wiring
8 Electric parts box lid
9 Wiring diagram
10 Electric parts box
1-1.5 m
1