4
EN
G
L
ISH
CONNECTING THE PIPING
3
EVACUATION OF THE
EQUIPMENT
4
CAUTION
Do not over tighten, over tightening cause gas leakage.
Model
Piping size (Torque)
Gas
Liquid
UX09*E5*, UX12*E5*, UD12*E5*, UD16*E5*,
UX09*E8*, UX12*E8*, UX16*E8*, UD09*E8*,
UD12*E8*, UD16*E8*
ø15.88mm
(5/8")
[65 N•m]
ø9.52mm
(3/8")
[42 N•m]
CONNECTING THE PIPING TO OUTDOOR UNIT
Decide piping length and then cut by using pipe cutter. Remove burrs
from cut edge. Make fl are after inserting the fl are nut (locate at valve)
onto the copper pipe. Align center of piping to valves and then tighten
with torque wrench to the specifi ed torque as stated in the table.
Local pipes can project in any of four directions.
•
Make holes in the pipe panels for the pipes to pass through.
•
Be sure to install the pipe panels to prevent rain from getting
inside the outdoor unit.
[Removing the service panel].
(1) Remove the three mounting screws.
(2) Slide the service panel downward to release the pawls.
After this, pull the service panel toward you to remove it.
Front pipe panel
Rear pipe panel
Mounting
screws
Service panel
Rear direction
Side panel
Downward
direction
Forward
direction
Close the tube joining area with
putty heat insulator (local supply)
without any gap as shown in right
fi gure. (To prevent insects or small
animal entering.)
Putty or Heat
insulator
(local supply)
WHEN INSTALLING AN AIR-TO-WATER HEAT PUMP, BE SURE TO
EVACUATE THE AIR INSIDE THE UNIT AND PIPES in the following
procedure.
Vacuum
pump
adaptor
Vacuum
pump
OPEN
CLOSE
Close
Gas side
Liquid side
Outdoor unit
Three-way valve
Two-way valve
Close
Indoor unit
1. Connect a charging hose with a push pin to the Low side of a
charging set and the service port of the 3-way valve.
•
Be sure to connect the end of the charging hose with the push
pin to the service port.
2. Connect the center hose of the charging set to a vacuum pump
with check valve, or vacuum pump and vacuum pump adaptor.
3. Turn on the power switch of the vacuum pump and make sure that
the needle in the gauge moves from 0 cmHg (0 MPa) to –76 cmHg
(–0.1 MPa). Then evacuate the air approximately ten minutes.
4. Close the Low side valve of the charging set and turn off the
vacuum pump. Make sure that the needle in the gauge does not
move after approximately fi ve minutes.
Note : BE SURE TO FOLLOW THIS PROCEDURE IN ORDER
TO AVOID REFRIGERANT GAS LEAKAGE.
5. Disconnect the charging hose from the vacuum pump and from the
service port of the 3-way valve.
6. Tighten the service port caps of the 3-way valve at a torque of
18 N•m with a torque wrench.
7. Remove the valve caps of both of the 2-way valve and 3-way
valve. Position both of the valves to “OPEN” using a hexagonal
wrench (4 mm).
8. Mount valve caps onto the 2-way valve and the 3-way valve.
•
Be sure to check for gas leakage.
1. To cut
2. To remove burrs
3. To fl are
Q
Improper fl aring
Q
Inclined Surface
damaged
Cracked Uneven
thickness
When properly fl ared, the internal
surface of the fl are will evenly shine
and be of even thickness. Since the
fl are part comes into contact with the
connections, carefully check the fl are
fi nish.
Bar
Red arrow mark
Handle
Core
Yoke
Clamp
handle
Bar
0 – 0.5 mm
Copper
pipe
Reamer
Point
down
Pipe
CUTTING AND FLARING
THE PIPING
1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not removed, gas
leakage may be caused. Turn the piping end down to avoid the
metal powder entering the pipe.
3. Please make fl are after inserting the fl are nut onto the copper
pipes.
ACXF60-03260.indb 4
8/25/2016 10:10:06 AM
