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installation manual
-76 cmHg
Lo-lever
Hi-lever
Charge hose
Charge hose
Vacuum pump
Lo-lever
Manifold valve
Multi-meter
Pressure meter
Additional Refrigerant Charge7.2
CAUTION
Refrigerant cannot be charged until field wiring has been
completed.
Refrigerant may only be charged after performing the leak
test and the vacuum pumping.
When charging a system, care shall be taken that its
maximum permissible charge is never exceeded, in view of
the danger of liquid hammer.
Charging with an unsuitable substance may cause explosions
and accidents, so always ensure that the appropriate
refrigerant is charged.
Refrigerant containers shall be opened slowly.
Always use protective gloves and protect your eyes when
charging refrigerant.
The outdoor unit is factory charged with refrigerant.
Calculate the added refrigerant according to the diameter
and the length of the liquid side pipe of the outdoor
unit/indoor unit connection.
Outdoor
unit
Indoor
unit
Stop valve
Gas side
Liquid side
A
C
D
B
Fig.7-10
Fig.7-11
Table 7-4
Added Refrigerant When
Over 5m
(One-way)
Less than 5m (One-way)
R(g)
L(m)
6.35 Ø
D(mm)
Ø
9.53
Ø12.7
15g/m×L
30g/m×L 60g/m×L
R(g): Additional refrigetant to be charged
L(m): The length of the refrigerant pipe(one-way)
D(mm)
: Liquid Side Piping Diameter
The drain pipe of indoor unit must be heat insulated, or it will
condense dew, as well as the connections of the indoor unit.
Hard PVC binder must be used for pipe connection, and make
sure there is no leakage.
With the connection part to the indoor unit, please be noted not
to impose pressure on the side of indoor unit pipes.
When the declivity of the drain pipe downwards is over 1/100,
there should not be any winding.
The total length of the drain pipe when pulled out traversely
shall not exceed 20m, when the pipe is over long, a prop stand
must be installed to prevent winding.
Refer to the figures on the right for the installation of the pipes.
CAUTION
8. CONNECT THE DRAIN PIPE
Install the drainpipe of the indoor unit
The outlet has PTI screw bread, Please use sealing materials
and pipe sheath(fitting) when connecting PVC pipes.
Drainage test
Check whether the drainpipe is unhindered.
New built house should have this test done before
paving the ceiling.
1.5m~2m
Insulating
material
Downward declivity
lower than 1/100
Bend
S shape
VP30
Downward declivity
lower than 1/100
Put as deep as possible
(about 10cm)
Fig. 8-1
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