1-63
1
1
12
Checking the Drainage
Be careful since the fan will start
when you short the pin on the
indoor control board.
After wiring (refer to
1-10
. E
lectrical
W
iring
.) and drain
piping are completed, use the following procedure to check
that the water will drain smoothly. For this, prepare a bucket
and wiping cloth to catch and wipe up spilled water.
(1) Connect power to the power terminal board (L, N
terminals) inside the electrical component box.
(2) Slowly pour about 1 L of water into the drain pan to
check drainage.
Drainage check
Over 100 mm
Plastic container for
water intake
Water (Approx. 1 L)
Drain pan outlet
(3) Short the check pin (CHK) (6P : 5-6) on the indoor
control board and operate the drain pump. Check the
water flow through the transparent drain pipe and see if
there is any leakage.
* If the check pin (CHK) (6P:5-6) is shorted, the fan starts
rotating at high speed and could cause injury.
(4) When the check of drainage is complete, open the check
pin (CHK) (6P : 5-6) and remount the tube cover.
(5) Checkpoint after installation
After installation of indoor and outdoor units, panels
and electrical wiring, check the
following items.
CAUTION
Important Note for Wiring 4-Way Cassette Type
(1) The power supply inlet is located at the lower area of
the refrigerant tubing side of the unit. The electrical
component box is located at the air intake of the bottom
of the unit.
(2) Before installing the panel for cassette, be sure to carry
out the wiring connection.
(3) Remove the lid located on the bottom of the indoor unit
attaching the electrical component box by unscrewing
the Phillips head tapping screws (×2).
(4) Lead the wires from the power supply inlet to the unit.
Be sure to lead the wires through the power supply inlet.
Make sure that no wire is caught between the indoor unit
and panel for cassette. Otherwise, the unit may cause a
fire.
(5) Connect the wires into the terminals through the power
supply inlet for the electrical component box.
Fix the wires with a clamping clip.
(6) Reinstall the lid of the electrical component box in its
original position with paying attention not to have the
wires caught in the lid.
Refer to “
1-10
. E
lectrical
W
iring
”.
Power supply inlet
Tapping screw position
281258_EU.indb 12
2016-9-1 13:03:44
5. HOW TO PROCESS TUBING
Connecting the Refrigerant Tubing
Use of the Flaring Method
Many of conventional split system air conditioners employ the
flaring method to connect refrigerant tubes that run between
indoor and outdoor units. In this method, the copper tubes are
flared at each end and connected with flare nuts.
Flaring Procedure with a Flare Tool
(1) Cut the copper tube to the required length with a tube
cutter. It is recommended to cut approx. 30 – 50 cm longer
than the tubing length you estimate.
(2) Remove burrs at each end of the copper tubing with a tube
reamer or a similar tool. This process is important and
should be done carefully to make a good flare. Be sure to
keep any contaminants (moisture, dirt, metal filings, etc.)
from entering the tubing.
After
Before
Deburring
Copper
tubing
Reamer
NOTE
When reaming, hold the tube end downward and be sure that
no copper scraps fall into the tube.
(3) Remove the flare nut from the unit and be sure to mount it
on the copper tube.
(4) Make a flare at the end of the copper tube with a flare tool.
Flare nut
Copper
tubing
Flare tool
NOTE
A good flare should have the following characteristics:
●
inside surface is glossy and smooth
●
edge is smooth
●
tapered sides are of uniform length
Caution Before Connecting Tubes Tightly
(1) Apply a sealing cap or water-proof tape to prevent dust or
water from entering the tubes before they are used.
(2) Be sure to apply refrigerant lubricant (ether oil) to the
inside of the flare nut before making piping connections.
This is effective for reducing gas leaks.
Apply refrigerant lubricant.
(3) For proper connection, align the union tube and flare tube
straight with each other, then screw on the flare nut lightly
at first to obtain a smooth match.
Flare nut
Union
●
Adjust the shape of the liquid tube using a tube bender at the
installation site and connect it to the liquid tubing side valve
using a flare.
Connecting Tubing Between Indoor and
Outdoor Units
(1) Tightly connect the indoor-side refrigerant tubing extended
from the wall with the outdoor-side tubing.
Indoor Unit Tubing Connection (
1
,
2
...
n-1
)
Indoor unit type 36 45 50 60 71 100 125 140
Gas tubing (mm)
ø12.7
ø15.88
Liquid tubing (mm)
ø6.35
ø9.52
(2) To fasten the flare nuts, apply specified torque.
●
When removing the flare nuts from the tubing connections,
or when tightening them after connecting the tubing, be sure
to use a torque wrench and a spanner.
If the flare nuts are over-tightened, the flare may be damaged,
which could result in refrigerant leakage and cause injury or
asphyxiation to room occupants.
Outdoor unit
Torque wrench
Spanner
Indoor unit
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2016-9-1 13:03:51
■
HOW TO PROCESS TUBING
SM830252-01_欧州_Single_8・10HP_TD_SM.indb 63
16/10/14 13:57:27
AMP Air Conditioning
www.ampair.co.uk | [email protected]
