●
●
●
●
When the pumping has finished, close the Lo-lever of the manifold
valve completely and turn off the vacuum pump.
When you have pumped for over 15 minutes, please confirm
that the indicator of multimeter is on -1.0X105Pa (-76cmHg)
Loosen and remove the quadrangle cover of stop valves A and
B to open stop valve A and B completely, then fasten them.
Disassemble the charge hose from the repair-mouth of stop
valve A, and fasten the nut.
●
Turn on the vacuum pump. At the beginning of pumping, loosen
the maintenance terminator nut of stop valve B a little to check
whether the air comes in (the sound of the pump changes, and the in-
dicator of compound meter turns below zero). Then fasten the
nut.
●
●
●
●
●
The necessary filling amount of refrigerant
Refrigerant volume to be added is calculated according to outdoor
unit installation manual .Be sure to add refrigerant measuring
by a scale. L: The length of the pipe
Please record the quantity added and store it carefully for future
maintenance.
Expel the air with a vacuum pump (Refer to
Fig.12-4
) (Please
refer to its manual for the way of using manifold valve)
Loosen and remove the maintenance nuts of stop valves A and
B, and connect the charge hose of the manifold valve with the
maintenance terminator of stop valve A. (Be sure that stop
valves A and B are both closed)
Connect the joint of the charge hose with the vacuum pump.
Open the Lo-lever of the manifold valve completely.
●
●
Fasten the nut
Put the connecting tubing at the proper position, wrench the
nuts with hands then fasten it with a wrench. (Refer to
Fig.12-4)
Too large torque will harm the bellmouthing and too small will
cause leakage. Please determine the torque according to
Table.12-2.
Install indoor unit drain pipe
The outlet has PTI screw bread, Please use sealing materials
and pipe sheath (fitting) when connecting PVC pipes.
13. CONNECT THE DRAIN PIPE
All the stop valves should be opened before test operation.
Each air conditioner has two stop valves of different sizes on
the side of the outdoor unit which operate as Lo-stop value, respec-
tively. (Refer to
Fig.10-6
)
Flare nut
Stopper
Cap
Valve body
Valve stem
Fig.12-6
Fig.12-5
-76 cmHg
Lo-lever
Hi-lever
Charge hose
Charge hose
Vacuum pump
Lo-lever
Manifold valve
Multi-meter
Pressure meter
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.
CAUTION
maintenance of motor
˖
Bend
S shap
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 win ding.
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.
Fig.13-1
1.5M~2M
The height difference between drain pipe end to ground or drain
channel should be more than 50mm, and the drain pipe cannot
put in water. If the drain water was discharged to ditch directly,
the drain pipe must be upward bent into a U type water seal to
avoid odor into the interior through the drain pipe.
If the negative pressure of drain pan outlet is high, there must
be a water elbow in drain pipe to avoid poor drain or blow water
for negative pressure. Please install the water elbow as figure
4.4 shown, each unit should install a water elbow. There should
be a plug in water elbow for convenient cleaning.
0 1 2
F
3
E
4
D
5
C
6
B
7
A
89
0 1 2
F
3
E
4
D
5
C
6
B
7
A
89
Installation manual
14
Duct 100% fresh air
