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Piping installation
Installer and user reference guide
68
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
2
A
A2
B2
C2
B
C
D
G
J
j
f
F
E2
D2
E
H4
H3
H1
H1
H2
e
d
g
c
a
b2
a2 e2
d2
c2
1
3
5
4
4
5
5
3
H4
1
Capacity up unit (LRNUN5*)
2
Outdoor unit (LRYEN10*)
3
Indoor unit (showcase)
4
Indoor unit (blower coil)
5
Indoor unit (air conditioning)
A~J
Liquid piping (side showcases and blower coils)
A2~E2
Liquid piping (side air conditioning)
a~g
Gas piping (side showcases and blower coils)
a2~e2
Gas piping (side air conditioning)
H1~H4
Height difference
In case the required pipe sizes (inch sizes) are not available, it is also allowed to use
other diameters (mm sizes), taken the following into account:
▪
Select the pipe size nearest to the required size.
▪
Use the suitable adapters for the change-over from inch to mm pipes (field
supply).
▪
The additional refrigerant calculation has to be adjusted as mentioned in the
following chapters:
-
For outdoor unit without capacity up unit:
-
For outdoor unit with capacity up unit: see
104] but additional refrigerant is not needed because
the capacity up unit is already precharged.
Piping size between outdoor unit and first branch
When the equivalent pipe length between outdoor unit and the furthest indoor
unit is 90 m or more (b+d), the size of the main gas pipe (b) must be increased
(size-up). If the recommended gas pipe (size-up) is not available, you must use the
standard size (which might result in a small capacity decrease).
e
d
b
c
a
a
Outdoor unit
b
Main gas pipe
c
First refrigerant branch
d
Piping between indoor unit and refrigerant branch
e
Furthest indoor unit
System side
Piping outer diameter size (mm)
(a)
Liquid side
Gas side
Refrigeration
Ø12.7×t0.85 (K65)
(b)
Ø15.9×t1.05 (K65)
(b)
Air conditioner
Ø15.9×t1.05 (K65)
Ø19.1×t1.3 (K65)