Daikin VRV IV Installer And User Reference Manual page 76

18 | Piping installation
Installer and user reference guide
76
Maximum allowable height difference
H1 ≤50 m (40 m) (if outdoor is located below indoor units)
Conditional extension up till 90 m is possible without additional option
kit:
▪ In case the outdoor location is higher than indoor: extension is possible
up till 90 m and following 2 conditions must be fulfilled:
- Liquid piping size up (see table "Size up" in
refrigerant branch kit and indoor
- Dedicated setting on outdoor unit is required (see [2‑49] in
Field settings" [
▪ In case the outdoor location is lower than indoor: extension is possible
up till 90 m and following 6 conditions must be fulfilled:
- 40~60 m: minimum connection ratio connected: 80%.
- 60~65 m: minimum connection ratio connected: 90%.
- 65~80 m: minimum connection ratio connected: 100%.
- 80~90 m: minimum connection ratio connected: 110%.
- Liquid piping size up (see table "Size up" in
refrigerant branch kit and indoor
- Dedicated setting on outdoor unit is required (see [2‑35] in
Field settings" [
H2 ≤30 m
H3 ≤5 m
Maximum allowable length after branch
The pipe length from the first refrigerant branch kit to the indoor unit ≤40 m.
Example 1.1: unit 8: b+c+d+e+f+g+p≤40 m
Example 1.2: unit 6: b+h≤40 m, unit 8: i+k≤40 m
Example 1.3: unit 8: i≤40 m
However, extension is possible if all below conditions are met. In this case
limitation can be extended up to 90 m.
1
a b c
2
A B C
h i
3
1 2
1 Outdoor unit
2 Refnet joints (A~G)
3 Indoor units (1~8)
Conditions:
a The piping length between all indoor units to the nearest branch kit is ≤40 m.
Example: h, i, j ... p≤40 m
4
120]).
4
120]).
d e f g
D E F G
j k l m n
3 4 5 6 7
H2
"E: Piping between
4
unit" [ 70]).
"E: Piping between
4
unit" [ 70]).
p
H1
8
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VRV IV system air conditioner
4P543427-1A – 2020.10
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