Refrigerant Piping - McQuay (5) CCX Series Montageanleitung

1. Piping Length & Elevation
A
B
C
Indoor
Model
Outdoor
Max. Length, A (m)
Max. Elevation, B (m)
Max. No. of Bends, C
Liquid Pipe Size
Gas Pipe Size
Cutting Copper Tube
1/4t
Copper Tube
Fig.R
Remove Burr
Copper Tube
Swaging
Block

REFRIGERANT PIPING

C
A
B
C
CCX20C CCX25C
SLV20B SLV25B
15 15
8 8
10 10
1/4" 3/8"
5/8" 5/8"
D
• When the piping length becomes too long, both the
capacity and reliability drop.
• As the number of bends increases, system piping
resistance to the refrigerant flow increases, thus lowering
the cooling capacity.
• As a result, compressor reliability will be affected.
• Always choose the shortest path and follow the
recommendation as tabulated below:
5CCX10C/CR 5CCX15C/CR
5SLX10C/CR 5SLX15C/CR
12 12
5 5
10 10
1/4" 1/4"
3/8" 1/2"
2. Piping Work
• Do not use contaminated or damaged copper tubing.
• If any piping, evaporator or condenser had been exposed or had been
opened for 15 seconds or more, vacuum the system.
• Generally, do not remove plastic, rubber plugs and brass nuts from the
valves, fittings, tubings and coils until it is ready for connection.
• If any brazing work is required, ensure that nitrogen gas is passed through
coil and joints while the brazing work is being done. This will eliminate
soot formation on the inside wall of copper tubings.
• Cut the pipe stages by stages, advancing the blade of pipe cutter slowly.
Extra force and a deep cut will cause more distortion of pipe and therefore
extra burr.
• Remove burr from cut edges of pipes with a remover as shown in Fig.R.
This will avoid unevenness on the flare faces which will cause gas leak.
• Hold the pipe on top position and burr remover at lower position to
prevent metal chips from entering the pipe.
• Insert the flare nuts mounted on the connection parts of both indoor and
outdoor unit, into the copper pipes.
• The exact length of pipe protruding from the face of the flare die is
determined by the flaring tool.
• Fix the pipe firmly on the flare die. Match the centers of both the flare
die and the flaring punch, and tighten flaring punch fully.
4
5CCX20C/CR 5CCX25C/CR
5SLX20C/CR 5SLX25C/CR
15 15
8 8
10 10
1/4" 1/4"
1/2" 5/8"