Daikin R410A Split Series Installation Manual download pdf (Page 12)

■English 10

How to Use Reducers

Use the reducers supplied with the unit as described below.

1) Connecting a pipe of φ12.7 to a gas pipe connection port for φ15.9:

2) Connecting a pipe of φ9.5 to a gas pipe connection port for φ15.9:

3) Connecting a pipe of φ9.5 to a gas pipe connection port for φ12.7:

• When using the reducer packing shown above, be careful not to over-

tighten the nut, or the smaller pipe may be damaged. (about 2/3 - 1

the normal torque)

• Apply a coat of refrigeration oil to the threaded connection port of the

outdoor unit where the flare nut comes in.

• Use an appropriate wrench to avoid damaging the connection thread

by overtightening the flare nut.

Flare nut tightening torque

Flare nut for φ9.5

32.7–39.9N·m

(333–407kgf·cm)

Flare nut for φ12.7

49.5–60.3N·m

(505–615kgf·cm)

Flare nut for φ15.9

61.8–75.4N·m

(630–769kgf·cm)

No.1

φ15.9

→ φ12.7

No.2

φ12.7

→ φ9.5

No.3

φ15.9

→ φ12.7

No.4

φ12.7

→ φ9.5

No.5

φ15.9

→ φ9.5

No.6

φ15.9

→ φ9.5

Gasket (1) Gasket (2) Reduce and gasket

No. 1

No. 3

Flare nut (for φ15.9)

Inter-unit piping

Connection port

of outdoor unit

Be sure to attach

the gasket.

No. 5

No. 6

Flare nut (for φ9.5)

Be sure to attach

the gasket.

No. 4

No. 2

Flare nut (for φ12.7)

Be sure to attach

the gasket.

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Daikin R410A Split Series Installation Manual Page 12

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