Refrigerant Piping Insulation - Daikin RZAG71N V1B Series Installer's Reference Manual

6 | Preparation
3 Maximum allowable piping length Pair: N/A
4 Maximum branch piping length
5 Maximum difference between
branch lengths
6 Maximum height between indoor
and outdoor
7 Maximum height between
indoors
(a)
Parenthesised figure represents the equivalent length.
Example
If the system layout is as follows...
▪ RZAG125
▪ Triple:
L2
L3
L4
L1
▪ Ø standard

6.3.2 Refrigerant piping insulation

Installer reference guide
32
Requirement
Twin: L1+L2+L3≤Limit
Triple: L1+L2+L3+L4≤Limit
Double twin:
L1+L2+L3+L4+L5+L6+L7≤Limit
Pair: N/A
Twin and triple: L2≤Limit
Double twin: L2+L4≤Limit
Pair: N/A
Twin: L2–L3≤Limit
Triple: L2–L4≤Limit
Double twin:
▪ L2–L3≤Limit
▪ L4–L5≤Limit
▪ L6–L7≤Limit
▪ (L2+L4)–(L3+L7)≤Limit
Pair, twin, triple and double twin:
H1≤Limit
Pair: N/A
Twin, triple and double twin:
H2≤Limit
▪ Use polyethylene foam as insulation material:
- with a heat transfer rate between 0.041 and 0.052 W/mK (0.035 and
0.045 kcal/mh°C)
- with a heat resistance of at least 120°C
▪ Insulation thickness
71
65 m
—
—
Then the requirements are...
1 3 m≤L1+L4
2 L1+L2≤85 m (100 m)
3 L1+L2+L3+L4≤85 m
4 L2≤20 m
5 L2–L4≤10 m
6 H1≤30 m
7 H2≤0.5 m
Limit
100 125+140
—
85 m
85 m
— 85 m
10 m
20 m
—
10 m
10 m
— 10 m
30 m
0.5 m
RZAG71~140N
Sky Air Alpha-series
4P695307-1A – 2024.02