Installation procedure – MRV Communications AE09~212FCAKA User Manual

Page 31

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30

Supplementary refrigerant

The refrigerant supplementation shall be as specified in the installation instructions
attached with the outdoor unit. The added refrigerant shall be R22.
The adding procedure shall be aided with a measuring meter
for a specified amount of supplemented refrigerant

Requirement

Overfilling or underfilling of refrigerant will cause compressor
fault. The amount of the added refrigerant shall be as specified
in the instructions.

Connection of refrigerant pipe

The connection of indoor unit pipes must use double spanners.
The installing torque shall be as given in the following table.

Double-spanner
operation

Connecting pipe

O.D.(mm)

я6.35

я9.52

я12.70

я15.88

Installing torque

(N-m)

11.8 (1.2kgf-m)

24.5 (2.5kgf-m)

49.0 (5.0 kgf-m)

78.4 (8.0 kgf-m)

Increased installing

torque (N-m)

13.7 (1.4 kgf-m)

29.4 (3.0 kgf-m)

53.9 (5.5 kgf-m)

98.0 (10.0 kgf-m)

Conduct flared connection work to
connect all refrigerant pipes.

Pipe cutting and expanding

If the pipe is too long or the flare is damaged,
it needs to be cut or expanded.

Pipe expander

Pipe expansion dimensions as follows:

6.35 mm (1/4

"

) 0.8 ~ 1.5

9.52 mm (3/8

"

) 1.0 ~ 1.8

12.7 mm (1/2

"

) 1.2 ~ 2.0

15.88 mm (5/8

"

) 1.4 ~2.2

Pipe diameter

ÿ

Size A (mm)

A

Allowable pipe length and drop

These parameters differ according to the outdoor unit. See the instruction manual attached
with the outdoor unit for details.

Pipe material and size

Pipe material

Model

Phosphorus deoxidized copper seamless pipe (TP

2

M) for air conditioner

Pipe size

(mm)

AE072FCAKA
AE092FCAKA

Gas side

ÿ9.52

Liquid side

ÿ6.35

AE122FCAKA
AE142FCAKA

я12.70

я6.35

R

efrigerant piping

Installation Procedure

AE182FCAKA
AE212FCAKA
AE242FCAKA

я15.88

я9.52

1. Pipe cutting 2. Removing burrs

3.Insertion nut 4. Pipe expansion

Slope Damage Bur Partial Overlong

Correct

Incorrect

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