Daikin CO2 Conveni-pack LRYEN10A7Y1 Installer And User Reference Manual page 68

16 | Piping installation
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
Piping size between outdoor unit and first branch
Installer and user reference guide
68
E D
F
3
G
4
H1
H3
g
f
e d
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:
refrigerant amount" [
- For outdoor unit with capacity up unit: see
refrigerant amount"
the capacity up unit is already precharged.
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).
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
Refrigeration
Air conditioner
1 2
B A
C
5
H4
J
4
a2
j
c a
4
104].
4
[ 104] but additional refrigerant is not needed because
a
d
b
c
Piping outer diameter size (mm)
Liquid side
Ø12.7×t0.85 (K65)
Ø15.9×t1.05 (K65)
A2
B2 C2
E2
5
D2
5 H1
e2
d2
b2 c2
"18.4 To determine additional
"18.4 To determine additional
e
(b)
Ø15.9×t1.05 (K65)
Ø19.1×t1.3 (K65)
H2
(a)
Gas side
(b)
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08