Refrigerant Pipe Connection - AUX AM Serie Manual De Usuario E Instalacion

4. Refrigerant pipe connection

Before installing, make sure that the height difference, the length of refrigerant pipe and number of bends
between indoor and outdoor units, meet the following specifications.
Max. lenght:
UNIT
Max. Length for all rooms (m)
Max. Leng th for one indoor unit (m)
Max. height different between
indoor and outdoor unit (m)
Max. height different between indoor units (m)
Note: If the outdoor unit is installed above the indoor units and the sum
of all the tanks is more than 7m, an oil trap must be installed in the
gas pipe every 3 meters.
Additional charge (R410A)
UNIT
Charged until
Additional
charge
1. Flaring work
Main cause for refrigerant leakage
is due to defect in the flaring work.
Carry out correct flaring work
using the following procedure:
A: Cut the pipes and the cable.
1. Use the piping kit accessory or pipes
purchased locally.
2. Measure the distance between the indoor
and the outdoor unit.
3. Cut the pipes a little longer than the
measured distance.
4. Cut the cable 1.5m longer than the pipe
length.
B: Burr removal
1. Completely remove all burrs from the cut
cross section of pipe/tube.
2. Put the end of the copper tube/pipe in a
downward direction as you remove burrs in
order to avoid dropping burrs into the tubing.
C: Putting nut on
Remove flare nuts attached to indoor and
outdoor unit, then put them on pipe/tube
having completed burr removal.(not possible
to put them on after flaring work)
REFRIGERANT PIPE CONNECTION
AM2
(2 to 1)
40
20
*(1)
OU higher than IU 15
OU lower than IU
15
10
AM2 (2 to 1)
10m
(Total Liquid Length 1/4")
Total Liquid Length 1/4":
22 x (Total length - 10)
(g)
Max. height difference:
AM3
(3 to 1)
Outdoor unit
60
20
15
15
10
AM3 (3 to 1)
15m
(Total Liquid Length 1/4")
Total Liquid Length 1/4":
22 x (Total length - 15)
。
90
Oblique
Fig.54
Pipe
Point down
Fig.55
Flare nut
Copper tube
38
Indoor unit
Indoor unit
10m
10m
Indoor unit
Roughness Burr
Reamer
Fig.56
5m