Daikin FMDQ50A7V3B Manuel D'installation Et D'utilisation page 7

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.
NOTE All field piping must be provided by a licensed
refrigeration technician and must comply with the
relevant local and national codes.
Use a pipe cutter and flare suitable for the used refrigerant.
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.
1 Torque wrench
2 Spanner
3 Piping union
4 Flare nut
Refer to Table 1 for the dimensions of flare nut spaces and the
appropriate tightening torque. (Overtightening may damage the
flare and cause leaks.)
Table 1
Pipe
gauge Tightening torque
Ø6.4 14.2~17.2 N•m
(144~176 kgf•cm)
Ø9.5 32.7~39.9 N•m
(333~407 kgf•cm)
Ø12.7 49.5~60.3 N•m
(504~616 kgf•cm)
Ø15.9 61.8~75.4 N•m
(630~770 kgf•cm)
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, then insulate it.
1 Liquid pipe
2 Gas pipe
3 Insulation for fitting of liquid line
(supplied with the unit)
4 Insulation for fitting of gas line
(supplied with the unit)
5 Clamps (use 2 clamps per
insulation)
FMDQ50~125A7V3B
Air conditioning system
4PW47630-1
1 2
3
4
Flare dimension
A (mm) Flare shape
8.7~9.1
90° ±2
12.8~13.2
A
16.2~16.6
R=0.4~0.8
19.3~19.7
3
1
5
4 2
D
RAIN PIPING WORK
Rig the drain piping as shown in the figure and take measures
against condensation. Improperly rigged piping could lead to leaks
and eventually wet furniture and belongings.
1-1.5 m
1 Hanging bar
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).
- Use the supplied drain hose and metal clamp. Tighten the
clamp firmly.
1 Metal clamp
2 Drain hose
3 White tape (field
supply)
Insulate the drain hose inside the building.
If the drain hose cannot be sufficiently set on a slope, fit the
hose with drain raising piping (field supply).
HOW TO PERFORM PIPING (See figure 8)
1 Ceiling slab
2 Hanging bar
3 Adjustable range
4 Drain hose (supplied with the unit)
5 Metal clamp (supplied with the unit)
6 Drain raising pipe (field supply)
Connect the drain hose to the drain raising pipes, and insulate
them.
Connect the drain hose to the drain pipe on the indoor unit, and
tighten it with the metal clamp.
Installation
Rear suction installation
When canvas duct is installed
When air inlet panel is directly installed
- 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 in
figure 9.
1 Multiple drain piping
2 After piping work is finished, check if drainage flows smoothly.
- Open the water inlet lid, add approximately 1 l of water
gradually and check the drainage flow. (See figure 10)
1 Water inlet
2 Portable pump
3 Water inlet lid
4 Bucket (adding water from water inlet)
5 Drain outlet for maintenance (with rubber drain plug)
6 Refrigerant pipes
1
3
1 2
A
275
350-530
275
Installation and operation manual
4