16
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Piping installation
Installer and user reference guide
69
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
(a)
For refrigeration piping (A, B, a) and for air conditioner piping (A2, a2)
(b)
For low load restrictions, see
"14.5.2 Constraints for refrigeration"
Piping size between branching areas or between first and second branch
Indoor unit capacity index
(kW)
Piping outer diameter size (mm)
Refrigeration side: liquid pipe
(a)
x≤10.0
Ø9.5×t0.65 (K65)
10.0<x
Ø12.7×t0.85 (K65)
Refrigeration side: gas pipe
(a)
x≤6.5
Ø9.5×t0.65 (K65)
6.5<x≤14.0
Ø12.7×t0.85 (K65)
14.0<x
Ø15.9×t1.05 (K65)
Air conditioner side: liquid pipe
(b)
—
Ø12.7×t0.85 (K65)
Air conditioner side: gas pipe
(b)
—
Ø15.9×t1.05 (K65)
(a)
Piping between branching areas (C, D, c, d)
(b)
Piping from first branch to second branch (B2, b2)
Piping size from branch to indoor unit
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
Refrigeration side
(a)
Same size as C, D, c, d.
If piping sizes of the indoor units are different, connect a reducer close to the
indoor unit to align piping sizes.
Air conditioner side
(b)
Ø12.7×t0.85 (K65)
Ø9.5×t0.65 (K65)
(a)
Piping from branch to indoor unit (E, F, G, J, e, f, g, j)
(b)
Piping from branch to indoor unit (C2, D2, E2; c2; d2; e2)
Stop valve size
Liquid side
Gas side
Refrigeration side
(a)
Ø15.9
Ø19.1
Air conditioner side
(a)
Ø15.9
Ø15.9
(a)
Reducers (field supply) may be required to connect the piping.
16.1.5 To select refrigerant branch kits
Always use K65 T-joints with a suitable design pressure for refrigerant branching.
