18
AHU Kit – Installation Instructions –
11/2021
General information and safety notes
1
U-71PZH3E5, U-71PZH3E8, U-100PZH3E5, U-100PZH3E8, U-125PZH3E5, U-125PZH3E8,
U-140PZH3E5, U-140PZH3E8
Installation height of indoor unit (h
0
)
Indoor unit type
Density limit
line
h
0
≥ 2.2 m
AHU unit (horizontal installation)
Line 1
1.8 m ≤ h
0
< 2.2 m
AHU unit (horizontal installation)
Line 2
h
0
< 1.8 m
AHU unit (vertical installation)
Line 3
[m
c
]
Refrigerant charge amount, specified in kilogrammes (kg)
[m
max
]
Maximum refrigerant charge amount, specified in kilogrammes (kg)
1.950 < [m
c
] ≤ [m
max
] Installation possible above the “Density Limit Line” for the relevant indoor/outdoor unit combina-
tion (see diagrams and tables below)
[m
c
] > [m
max
]
Can not be installed
350
300
250
200
150
100
50
0.0
1.950
2.0 2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0 6.5
5.975
35
30
25
20
15
10
5
0
1.950
2.0 2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0 6.5
5.975
[A
min
]: minimum indoor floor area (m
2
)
[A
min
]: minimum indoor floor area (m
2
)
[m
c
]: refrigerant charge (kg) of the outdoor unit
[m
c
]: refrigerant charge (kg) of the outdoor unit
Line 1
Line 2
Line 3
Elite
U-71PZH3E5
U-71PZH3E8
U-100PZH3E5
U-100PZH3E8
U-125PZH3E5
U-125PZH3E8
U-140PZH3E5
U-140PZH3E8
[m
max
] (kg)
2.850
5.975
1.3.2 Preventing leakages
● Do not let air enter the refrigeration cycle, because this will increase the risk of
explosion and injury due to high pressure inside the refrigerant cycle.
● Keep all tubing runs as short as possible.
● Use the flare method for connecting tubing and apply refrigerant lubricant to the
matching surfaces of the flare and union tubes before connecting them, then tighten
the nut with a torque wrench for a leak-free connection.
● Do not leak refrigerant while working on the refrigerant tubes during installation,
maintenance or repair.
● Check carefully for leaks (see →
) before starting the
test run.
02.08.2021, cH
- h
inst
=> h
0
(for more clarity/uniformity)
06.08.2021, JW: OK
Summary of Contents for PAW-280PAH3M-1
Page 2: ...Notes ...
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