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FMCQ50~125A8VEB
Air conditioning system
4PW56204-1

Installation and operation manual

4

4.

Check if the unit is horizontally levelled.

Do not install the unit tilted. The indoor unit is equipped with a
built-in drain pump and float switch. (If the unit is tilted against the
direction of the condensate flow (the drain piping side is raised),
the float switch may malfunction and cause water to drip.)

Check if the unit is levelled at all four corners with a water level or
a water-filled vinyl tube as shown in 

figure 12

.

5.

Remove the paper pattern for installation. (For new ceilings
only.)

R

EFRIGERANT

 

PIPING

 

WORK

For refrigerant piping of outdoor unit, refer to the installation manual
supplied with the outdoor unit.

Execute heat insulation work completely on both sides of the gas
piping and the liquid piping. Otherwise, this can sometimes result in
water leakage.

Before rigging tubes, check which type of refrigerant is used.

Use a pipe cutter and flare suitable for the used refrigerant.

To prevent dust, moisture or other foreign matter from infiltrating
the tube, either pinch the end, or cover it with tape.

Use copper alloy seamless pipes (ISO 1337).

The outdoor unit is charged with refrigerant.

To  prevent water leakage, execute heat insulation work
completely on both sides of the gas and liquid piping. When
using a heat pump, the temperature of the gas piping can reach
up to approximately 120°C, use insulation which is sufficiently
heat resistant.

Be sure to use both a spanner and torque wrench together when
connecting or disconnecting pipes to/from the unit.

Do not mix anything other than the specified refrigerant, such as
air, etc..., inside the refrigerant circuit.

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

When connecting the flare nut, coat the flare inner surface with
ether oil or ester oil and initially tighten 3 or 4 turns by hand
before tightening firmly.

If the refrigerant gas leaks during the work, ventilate the area. A
toxic gas is emitted by the refrigerant gas being exposed to a fire.

Make sure there is no refrigerant gas leak. A toxic gas may be
released by the refrigerant gas leaking indoor and being
exposed to flames from an area heater, cooking stove, etc.

Finally, insulate as shown in the figure below (use the supplied
accessory parts)

Piping insulation procedure

1

Water level

2

Vinyl tube

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

Pipe gauge

Tightening torque 

(N•m)

Flare dimension A 

(mm)

Flare shape

Ø6.4

15~17 8.7~9.1

Ø9.5

33~39

12.8~13.2

Ø12.7

50~60

16.2~16.6

Ø15.9

63~75

19.3~19.7

1

2

4

3

R=0.4~0.8

45

° ±

2

90

°±

2

A

Gas piping

Liquid piping

1

Piping insulation material (field supply)

2

Flare nut connection

3

Insulation for fitting (delivered with the unit)

4

Piping insulation material (main unit)

5

Main unit

6

Clamp (field supply)

7

Medium 1 sealing pad for gas piping (delivered with the unit)
Medium 2 sealing pad for liquid piping (delivered with the unit)

A

Turn seams up

B

Attach to base

C

Tighten the part other than the piping insulation material

D

Wrap over from the base of the unit to the top of the flare nut 
connection

For local insulation, be sure to insulate local piping all
the way into the pipe connections inside the unit.

Exposed piping may cause condensation or may
cause burns when touched.

1
2

5

3

4
5

1

Liquid pipe

2

Gas pipe

3

Insulation for fitting for liquid 
pipe

4

Insulation for fitting for gas 
pipe

5

Clamps 
(use 2 clamps per insulation)

A

B

D

C

7

1

2

3

4

5

6

6

A

B

C

1

2

3

4

5

6

6

D

7

Summary of Contents for FMCQ50A8VEB

Page 1: ...INSTALLATION AND OPERATION MANUAL FMCQ50A8VEB FMCQ60A8VEB FMCQ71A8VEB FMCQ100A8VEB FMCQ125A8VEB Air conditioning system...

Page 2: ...0 860 910 840 780 710 840 860 910 950 4 125 130 3 1 840 910 840 910 1 4 2 5 6 3 860 860 910 20 20 35 35 3 5 0 75 675 850 175 300 mm 1 1 5 m 2 3 1 5 6 100 mm 1 0 675 mm 1 3 4 3 1 2 4 100 90 mm 7 mm 80...

Page 3: ...lecido em A e com o parecer positivo de B de acordo com o Certificado C 09 A B C 10 Bem rk som anf rt i A og positivt vurderet af B i henhold til Certifikat C 11 Information enligt A och godk nts av B...

Page 4: ...lastic parts may deteriorate Where corrosive gas like sulphurous gas exists Copper tubing and brazed spots may corrode Where volatile flammable gas like thinner or gasoline is used Where machines gene...

Page 5: ...t the distance between wireless remote controller and indoor unit might be shorter if there are fluorescent lights who are electrically started in the room The indoor unit must be installed as far as...

Page 6: ...see figure 6 2 Fix the paper pattern for installation For new ceilings only The paper pattern for installation corresponds with the measure ments of the ceiling opening Consult the builder for details...

Page 7: ...tightening torque Overtightening may damage the flare and cause leaks Table 1 When connecting the flare nut coat the flare inner surface with ether oil or ester oil and initially tighten 3 or 4 turns...

Page 8: ...ose to insulate and fix it with clamps Insulate the complete drain piping inside the building field supply If the drain hose cannot be sufficiently set on a slope fit the hose with drain raising pipin...

Page 9: ...nit A unit B and be sure the terminal block wiring to the outdoor unit is matching properly If wiring and piping between the outdoor unit and an indoor unit are mismatched the system may cause a malfu...

Page 10: ...es according to the table below When attaching the control box lid make sure not to pinch any wires After all wiring connections are done fill in any gaps in the casing wiring holes with putty or insu...

Page 11: ...the remote controller sensor See note 5 6 Use unit sensor only or remote sensor if installed See note 5 6 Use remote controller sensor only See note 5 6 3 Setting for display of time between 2 filter...

Page 12: ...ining access to terminal devices all power supply circuits must be interrupted To clean the air conditioner be sure to stop operation and turn the power switch off Otherwise an electric shock and inju...

Page 13: ...panel Hold the suction grille open at 45 degrees and lift it upward to unhook it from the decoration panel 3 Remove the air filter actions 2 to 4 in the illustration Refer to procedure step 2 in How...

Page 14: ...H4P Light emmiting diode Defrost Orange SS1 Selector switch MAIN SUB SS2 Selector switch wireless address set Connector for optional parts X24A Connector wireless remote controller X33A Connector ada...

Page 15: ...1 F2 T1 T2 LN P1 P2 F1 F2 T1 T2 LN P1 P2 F1 F2 T1 T2 LN P1 P2 F1 F2 T1 T2 P1 P2 P1 P2 1 4 2 3 5 IN D OUT D F1 F2 F1 F2 Control box LN P1 P2 P1 P2 F1 F2 T1 T2 P1 P2 P1 P2 F1 F2 T1 T2 LN P1 P2 P1 P2 F1...

Page 16: ...4PW56204 1 Copyright Daikin...

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