Daikin LRNUN5A7Y1, Installer And User Reference Manual

Page: 66 / 140

16 | Piping installation
Installer and user reference guide
66
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
Requirement Limit
LRYEN10* LRYEN10* +
LRNUN5*
Maximum piping length
Examples:
▪ A+B+C+D+(E or F)
(a)
≤Limit
▪ a+c+d+(e or f)
(a)
≤Limit
▪ A2+B2+(C2 or D2)
(a)
≤Limit
▪ a2+b2+(c2 or d2)
(a)
≤Limit
Refrigeration side: 130 m
(b)
Air conditioning side: 130 m
Piping length between LRYEN10* and
LRNUN5*
Not specified, but piping must be
horizontal
Maximum branch piping length
▪ Example refrigeration side:
- C+D+(E or F)
(a)
- c+d+(e or f)
(a)
- c+g
- j
▪ Example air conditioner side:
- B2+(C2 or D2)
(a)
- b2+(c2 or d2)
(a)
Refrigeration side: 50 m
Air conditioning side: 30 m
Maximum height
difference
between outdoor
unit and indoor
unit
(b)
Outdoor higher
than indoor
Example: H2,
H4≤Limit
35 m
"To install an oil trap" [
4
66]
Outdoor unit lower
than indoor unit
Example: H2,
H4≤Limit
10 m
"To install riser piping" [
4
67]
Maximum height difference between
blower coil and showcase
▪ Example: H3≤Limit
5 m
Maximum height difference between
air conditioners
▪ Example: H1≤Limit
0.5 m
(a)
Whichever is longer
(b)
For low load restrictions, see "14.5.2 Constraints for refrigeration" [
4
49].
To install an oil trap
If the outdoor unit is installed higher than the indoor unit, install an oil trap in the
gas piping every 5 meter. Oil traps will make the oil return more easily.