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4. installing
the refrigerant
piping
If PKA-A.HA(L)
4.4.1.
Storing
in the
piping
space
of the
unit
(Fig.
4-4)
1. Wrap
the supplied
felt tape in the range
of the refrigerant
piping
which
will be
housed
within
the piping
space
of the unit to prevent
dripping.
2. Overlap
the felt tape at one-half
of the tape width.
3. Fasten
the end portion
of the wrapping
with vinyl tape,
etc.
c_
Gas pipe
Liquid pipe
Indoor/outdoor
connection cable
Felt tape
Fig. 4-4
5. Drainage
piping
work
O
X
X
X
i
i
Fig. 5-1
5.1. Drainage
piping work (Fig. 5-1)
• Drain
pipes should
have an inclination
of 1/100
or more.
• For extension
of the drain pipe,
use a soft hose (inner
dia. 15 mm,
19/32
inch)
available
on the market
or hard vinyl chloride
pipe (VP-16/O.D.
e22
mm,
e55/64
inch PVC TUBE).
Make
sure that there
is no water
leakage
from
the
connections.
• Do not put the drain
piping
directly
in a drainage
ditch
where
sulphuric
gas may
be generated.
• When
piping
has been completed,
check
that water
flows
from the end of the
drain pipe.
Caution:
The drain
pipe
should
be installed
according
to this
Installation
Manual
to
ensure
correct
drainage.
Thermal
insulation
of the drain
pipes
is necessary
to prevent
condensation.
If the drain
pipes
are not properly
installed
and
insulated,
condensation
may drip
on the ceiling,
floor
or other
possessions.
Inclined
downwards
B
Must
be lower
than outlet
point
(
Water
leakage
b
Trapped
drainage
E
Air
Wavy
(
The end
of drain
pipe
is under
water.
(H Drainage
ditch
(
5 cm,
1-31/32
inch
or less between
the
end
of drain
pipe
and
the
ground.
(J" Drain
hose
(k
Soft
PVC
hose
(Inside
diameter
15 mm,
19/32
inch)
or
Hard
PVC
pipe
(VP-16)
* Bond
with
PVC
type
adhesive
Fig. 5-2
Fig. 5-3
Preparing
left
and
left
rear
piping
(Fig.
5=2)
Remove
the drain
cap.
• Remove
the drain
cap by holding
the bit that sticks
out at the end of the pipe
and
pulling.
(_, Drain cap
{_i Remove
the drain
hose.
• Remove
the drain
hose by holding
on to the base of the hose {_i (shown
by
arrow)
and pulling
towards
yourself
{_i.
{_i Insert
the drain cap.
• Insert
a screwdriver
etc into the hole at the end of the pipe and be sure
to push
to the base of the drain
cap.
{_i Insert
the drain hose.
• Push
the drain hose until it is at the base of the drain box connection
outlet.
• Please
make
sure the drain
hose hook is fastened
properly
over
the extruding
drain box connection
outlet.
(B} Hooks
Storing
in the
piping
space
of the
indoor
unit
(Fig.
5=3)
* When
the drain hose will be routed
indoors,
be sure
to wrap
it with commercially
available
insulation.
* Gather
the drain
hose and the refrigerant
piping
together
and wrap them
with the
supplied
felt tape 3j.
* Overlap
the felt tape
_J at one-half
of the tape
width.
* Fasten
the end portion
of the wrapping
with vinyl tape, etc.
Gas
pipe
B
Liquid
pipe
Drain
hose
b
Indoor/outdoor
connection
wiring
(E} Fett tape
(3
Fig. 5-4
• ' Check
of drainage
(Fig.
5-4)
1. Open
the front grille
and remove
the filter.
2. Facing
the fins of the heat
exchanger,
slowly
fill with water.
3. After
the drainage
check,
attach
the filter and close
the grille.
7
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