Installation and operation manual
6
-
Tighten the metal clamp until the screw head is less than
4 mm from the metal clamp part as indicated in the
illustration.
-
After the testing of drain piping is finished, attach the drain
sealing pad (4) supplied with the unit over the uncovered
part of the drain socket (= between drain hose and unit
body).
-
Wrap the supplied large sealing pad over the metal clamp
and drain hose to insulate and fix it with clamps.
-
Insulate the complete drain piping inside the building (field
supply).
-
If the drain hose cannot be sufficiently set on a slope, fit
the hose with drain raising piping (field supply).
How to perform piping
(See figure 7)
1
Connect the drain hose to the drain raising pipes, and
insulate them.
2
Connect the drain hose to the drain outlet on the indoor unit,
and tighten it with the clamp.
Precautions
-
Install the drain raising pipes at a height of less than
675 mm.
-
Install the drain raising pipes at a right angle to the indoor
unit and no more than 300 mm from the unit.
-
To prevent air bubbles, install the drain hose level or
slightly tilted up (
≤
75 mm).
Testing of drain piping
After piping work is finished, check if drainage flows smoothly.
Add approximately 1 l of water gradually through the air
discharge outlet.
Method of adding water. See
figure 11
.
Check the drainage flow.
In case electric wiring work is finished
Check drainage flow during COOL running, explained in
"Test operation"
on page 9
.
In case electric wiring work is not finished
-
Remove the control box lid. Connect the power supply firmly to
the terminal. See
figure 10
.
-
Reattach the control box lid and turn on the power.
-
Do not touch the drain pump. It may result in electric shock.
-
Confirm the drain operation looking at the drain socket.
-
After checking the drainage flow, turn off the power, remove the
control box lid and disconnect the power supply from the
terminal again.
-
Reattach the control box lid.
1
Drain socket (attached to the unit)
2
Drain hose (supplied with the unit)
1
Drain socket (attached to the unit)
2
Drain hose (supplied with the unit)
3
Metal clamp (supplied with the unit)
4
Drain sealing pad (supplied with the unit)
5
Large sealing pad (supplied with the unit)
6
Drain piping (field supply)
1
Ceiling slab
2
Hanger bracket
3
Adjustable range
4
Drain raising pipe (nominal diameter of vinyl pipe = 25 mm)
5
Drain hose (supplied with the unit)
6
Clamp metal (supplied with the unit)
2
1
1
6
2
4
3
5
4 mm
3
5
2
A
A'
A-A'
1
NOTE
The incline of attached drain hose should be
75 mm or less so that the drain socket does
not have to withstand additional force.
To ensure a downward slope of 1:100, install
hanging bars every 1 to 1.5 m.
When unifying multiple drain pipes, install the
pipes as shown in
figure 9
. Select converging
drain pipes whose gauge is suitable for the
operating capacity of the unit.
1
T-joint converging drain pipes
1
Plastic watering can (tube should be about 100 mm long)
2
Service drain outlet (with rubber plug) (Use this outlet to
drain water from the drain pan)
3
Drain pump location
4
Drain pipe
5
Drain socket (water flow view point)
1
Control box lid
2
Power supply wiring
3
Power supply terminal block
4
Clamp (field supply)
5
Unit transmission wiring
6
Terminal block for transmission wiring
7
Opening for cables
8
Wiring diagram label
(on the back side of the control box lid)
9
Earth cable
10
Remote controller wiring
Power supply terminal block (3)
L
N
EN3P320142-1F.book Page 6 Tuesday, October 3, 2017 2:46 PM
