INVENTOR V5MFI-66, Руководство пользователя и инструкция по установке

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Page 30
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Refrigerant Piping Connection
Bends: no more than 5 places. A minimum pipe run of 3 metres is required to minimise vibration &
excessive noise.
Note on Pipe Length
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.
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
European 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 75/246 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
Oil traps
CAUTION
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 6m(20ft)
of vertical suction line riser
(
＜ 36000Btu/h unit).
An oil trap should be installed every
10m(32.8ft) of vertical suction line riser
(≥36000Btu/h unit).
10m/32.8ft
(≥36000Btu/h unit)
6m/20ft
( ＜ 36000Btu/h unit)
10m/32.8ft
(≥36000Btu/h unit)
6m/20ft
( ＜ 36000Btu/h unit)
Indoor unit/
Outdoor unit
Indoor unit/
Outdoor unit
 Page 31 
Connection Instructions –
Refrigerant Piping
Step 1: Cut pipes
When preparing refrigerant pipes, take extra
care to cut and flare them properly. This will
ensure efficient operation and minimize the
need for future maintenance.
1. Measure the distance between the indoor
and outdoor units.
2.
Using a pipe cutter, cut the pipe a little longer
than the measured distance.
DO NOT DEFORM PIPE
WHILE CUTTING
Be extra careful not to damage, dent, or
deform the pipe while cutting. This will
drastically reduce the heating efficiency
of the unit.
Step 2: Remove burrs
Burrs can affect the air-tight seal of refrigerant
piping connection. They must be completely
removed.
1.
Hold the pipe at a downward angle to prevent
burrs from falling into the pipe.
2.
Using a reamer or deburring tool, remove all
burrs from the cut section of the pipe.
Pipe
Reamer
Point down
Step 3: Flare pipe ends
Proper flaring is essential to achieve an airtight seal.
1.
After removing burrs from cut pipe, seal
the ends with PVC tape to prevent foreign
materials from entering the pipe.
2.
Sheath the pipe with insulating material.
3. Make sure that the pipe is cut at a perfect 90°
angle.
Oblique Rough Warped
90°
4.Remove PVC tape from ends of pipe when
ready to perform flaring work.
5. Clamp flare form on the end of the pipe.
The end of the pipe must extend beyond
the flare form.
Flare form
Pipe
6. Place flaring tool onto the form.
7. Turn the handle of the flaring tool
clockwise until the pipe is fully flared. Flare
the pipe in accordance with the dimensions
shown in table .
3.
Place flare nuts on both ends of pipe. Make
sure they are facing in the right direction,
because you can’t put them on or change
their direction after flaring.
Flare nut
Copper pipe
8. Remove the flaring tool and flare form,
then inspect the end of the pipe for cracks
and even flaring.
PIPING EXTENSION BEYOND FLARE FORM
Pipe
gauge Tightening
torque
Flare dimension (A)
(Unit: mm/Inch)
Flare shape
Min. Max.
Ø 6.35
R0.4~0.8
45
°±
2
90
°
±
4
A
Ø 9.52
Ø 12.7
Ø 16
Ø 19
Ø 22
65-67 N.m
(663-683 kgf.cm)
23.2/0.91 23.7/0.93
75-85N.m
(765-867 kgf.cm)
26.4/1.04 26.9/1.06
18-20 N.m
(183-204 kgf.cm)
8.4/0.33 8.7/0.34
25-26 N.m
(255-265 kgf.cm)
13.2/0.52 13.5/0.53
35-36 N.m
(357-367 kgf.cm)
16.2/0.64 16.5/0.65
45-47 N.m
(459-480 kgf.cm)
19.2/0.76 19.7/0.78