Refrigerant Piping Connection; Notes On Pipe Length And Elevation - INVENTOR V5MDI32-18WiFiR/U5MRS32-18 Installations-Handbuch

Refrigerant Piping Connection

Safety Precautions
WARNING
• All field piping must be completed by a
licensed technician and must comply with
the local and national regulations.
• When the air conditioner is installed in a
small room, measures must be taken to
prevent the refrigerant concentration in
the room from exceeding the safety limit
in the event of refrigerant leakage. If the
refrigerant leaks and its concentration
exceeds its proper limit, hazards due to
lack of oxygen may result.
• When installing the refrigeration system,
ensure that air, dust, moisture or foreign
substances do not enter the refrigerant
circuit. Contamination in the system may
cause poor operating capacity, high
pressure in the refrigeration cycle,
explosion or injury.
• Ventilate the area immediately if there is
refrigerant leakage during the installation.
Leaked refrigerant gas is both toxic and
flammable. Ensure there is no refrigerant
leakage after completing the installation
work.
Refrigerant Piping with Twin Indoor Units
When installing multiple indoor units with a single outdoor unit, ensure that the length of the
refrigerant pipe and the drop height between the indoor and outdoor units meet the requirements
illustrated in the following diagram:
The drop height
between indoor
and outdoor unit
must be less than
or equal to 20m
Page 18
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unit
H2
The line branch pipe
(65.6')

Notes On Pipe Length and Elevation

Ensure that the length of the refrigerant pipe,
the number of bends, and the drop height
between the indoor and outdoor units meets
the requirements shown in Table 7.1:
Table 7.1: The Maximum Length And Drop
Height Based on Models. (Unit: m/ft.)
Type of model
North America,
Australia and the
eu frequency
conversion Split
Type
Other Split Type
Outdoor unit
L1
L
L2
Indoor unit
Fig. 7.1
Capacity Length of
piping
(Btu/h)
<15K 25/82
≥15K - <24K 30/98.4
≥24K - <36K 50/164
≥36K - ≤60K 65/213
12K 15/49
18K-24K 25/82
30K-36K 30/98.4
42K-60K 50/164
Indoor unit
The drop height
between two
indoor units
H1
must be less
than or equal to
50cm (19.6")
7
Maximum drop
height
10/32.8
20/65.6
25/82
30/98.4
8/26
15/49
20/65.6
30/98.4