Refnet Joint Selection; Installation Of Piping Filter - Samsung Electronics DVM Series Technical Manual

. Installation
8. Piping and refnet joint selection

8-6. Refnet joint selection

(1) Selection method of first refnet joint from the outdoor unit
The first refnet joint (joint A) from the outdoor unit shall be selected according to the outdoor unit model.
Refnet joint model
MXJ-0906AU
MXJ-1206AU
MXJ-2212AU
MXJ-3212AU
(2) Other refnet joint selection method
The refnet joint except the first one shall be selected according to the capacity of indoor unit installed.
Total capacity of
indoor unit
less than 55,000 Btu/h
more than 55,000 Btu/h

8-7. Installation of piping filter

Install the piping filter in the liquid refrigerant pipe using flare nuts.
You should install the filter within 3ft. from the outdoor unit.
Specifications of piping filter
- Size: 20µm
- Max applicable pressure: 40kgf/cm
- Types
1-way filter for cooling only model
2-way filter for heat pump model
Length (inch)
A B C D
16 1/2 3 1/8 3/8 -
16 1/2 3 1/8 1/2 -
16 1/2 3 1/2 7/8 3/4
16 1/2 3 1/2 1 1/4 1 1/8
Refnet joint model
Liquid side
MXJ-0906AU
MXJ-1206AU
2
Outdoor Unit
44
Diameter (inch)
E F G H
- 3/8 1/4 - 3/8
- 1/2 3/8 1/4 1/2
5/8 3/4 5/8 1/2 5/8
1 1 3/4 5/8 3/4
Gas side
MXJ-2212AU
MXJ-3112AU
Gas refrigerant pipe
Filter
Liquid refrigerant pipe
I J K
1/4 -
3/8 1/4
1/2 -
5/8 1/2