Samsung MCM-D201N - Welding with Nitrogen Blowing; Installing ASSY EEV

14
Installing an AHU KIT
Welding with nitrogen blowing
① ③ ④ ⑤
⑥
⑥
②
➀
Refrigerant pipe
➁
Location for welding
➂
Tape
➃
Hands valve
➄
Reducing valve
➅
Nitrogen gas
1. When welding a pipe, perform nitrozen blowing work.
- If you didn't blow the nitrogen for pipe welding, many oxides would be accumulated inside the pipe, which may cause
the valve of refrigerant system and compressor to operate abnormally.
2. When inputting the nitrogen gas, the rate of ow for nitrogen gas should be less than 0.02MPa using the reducing
valve. (You should be able to feel the degree on your skin.)
Installing ASS'Y EEV(Not provided)
1. Check that ASS'Y EEV is installed inside the AHU.
- Since dew condensation may occur around the ASS'Y EEV pipe, install the ASS'Y EEV at a place where condensate water
can be drained.
2. Check whether IN and OUT pipe connection is correct.
3. Essential to check the ASS'Y EEV main body is installed vertically.
- ASS'Y EEV main body should be installed within the range of +/- 15˚ of standard for vertical installation. Otherwise, the
reliability of ASS'Y EEV cannot be guranteed.
4. Fix the EEV to AHU xing groove rmly as shown in the image A below.
A
B
A: High pressure pipe from outdoor unit(IN)
- Diameter : Ø12.7mm
B: Low pressure pipe to AHU heat exchanger(OUT)
- Diameter : Ø12.7mm
30°
Standard for vertical
installation
Standard for vertical
installation
30°
Insulator
Clamp(Work area for AHU
manufacturer)
Insulator(Work area for AHU
manufacturer)
Clamp
A