MRV Communications AE242FCAKA, AE212FCAKA Refrigerant piping, Pipe cutting and expanding

Installation Procedure

Refrigerant piping

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 Phosphorus deoxidized copper seamless pipe (TP2M) for air conditioner

Model		AE072FCAKA	AE122FCAKA	AE182FCAKA
		AE092FCAKA	AE142FCAKA	AE212FCAKA
				AE242FCAKA
Pipe size	Gas side	ÿ9.52	ÿ12.70	ÿ15.88
(mm)	Liquid side	ÿ6.35	ÿ6.35	ÿ9.52

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	A
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.	Pipe expander

Connection of refrigerant pipe

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.

1. Pipe cutting 2. Removing burrs

3.Insertion nut 4. Pipe expansion

Pipe expansion dimensions as follows:

Pipe diameter ÿ	Size A (mm)
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

Correct Incorrect

Slope Damage Bur Partial Overlong

The connection of indoor unit pipes must use double spanners.

The installing torque shall be as given in the following table.

Connecting pipe	Installing torque	Increased installing
O.D.(mm)	(N-m)	torque (N-m)
ÿ6.35	11.8 (1.2kgf-m)	13.7 (1.4 kgf-m)
ÿ9.52	24.5 (2.5kgf-m)	29.4 (3.0 kgf-m)
ÿ12.70	49.0 (5.0 kgf-m)	53.9 (5.5 kgf-m)	Double-spanner
ÿ15.88	78.4 (8.0 kgf-m)	98.0 (10.0 kgf-m)
			operation

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