79
User manual
Hydrobox module AQMS80X1i
EN
PART 2. INSTALLATION MANUAL
6. REFRIGERANT PIPING CONNECTION
When connecting refrigerant piping, do not let substances or gases other than the specified refrigerant enter
the unit. The presence of other gases or substances will lower the unit’s capacity, and can cause abnormally
high pressure in the refrigeration cycle. This can cause explosion and injury.
Note on Pipe Length
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 the following table:
The Maximum Length And Drop Height Based on Models. (Unit: m/ft.)
Type of model
Capacity (Btu/h)
Length of piping
Maximum drop height
North America, Australia
and the eu frequency
conversion Split Type
<15K
25/82
10/32.8
≥15K - <24K
30/98.4
20/65.6
≥24K - <36K
50/164
25/82
≥36K - ≤60K
65/213
30/98.4
Other Split Type
12K
15/49
8/26
18K - 24K
25/82
15/49
30K - 36K
30/98.4
20/65.6
42K - 60K
50/164
30/98.4
CAUTION
Oil traps
If the indoor unit is installed higher than
the outdoor unit:
• If oil flows back into the outdoor
unit’s compressor, this might cause
liquid compression or deterioration
of oil return. Oil traps in the rising
gas piping can prevent this.
An oil trap should be installed every 10m
(32.8ft) of vertical suction line riser.
Gas piping
Oil trap
Outdoor unit
Liquid
piping
10m/32.8ft
10m/32.8ft
Indoor unit
The indoor unit is installed higher than the outdoor unit
