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Piping installation
Installer and user reference guide
67
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B – 2021.11
Total piping length
1000 m
/500 m
Example 1.1
▪
a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤1000 m
Example 2.1
▪
a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤500 m
▪
Between outdoor branch and outdoor unit (only in case >16 HP)
Actual piping length
10 m
Example 3
▪
r, s, t≤10 m; u≤5 m
Equivalent length
13 m
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 unit"
62]).
-
Dedicated setting on outdoor unit is required (see [2‑49] in
"19.2.8 Mode 2: Field settings"
107]).
▪
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 unit"
62]).
-
Dedicated setting on outdoor unit is required (see [2‑35] in
"19.2.8 Mode 2: Field settings"
107]).
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.
