7
installation manual
Make sure to tighten the cap securel y .
For the tightening torque, refer to the table belo w .
T able 6-2
T ightening torque N M ( T urn clockwise to close)
Stop
V alve size
Shaft (valve body)
Cap
( V alve lid)
Ø6.4
Hexagonal
wrench 4 mm
Ø9.5
Ø12.7
Ø15.9
Hexagonal
wrench 6 mm
Hexagonal
wrench 6 mm
Ø19.1
Maintenance nut
35 ～ 40
23 ～ 27
18 ～ 22
13.5 ～ 16.5 5 ～ 7
7 ～ 9
9 ～ 1 1
1 1 ～ 13
1 1.5 ～ 13.9
Additional Refrigerant Charge
6.2
Refrigerant cannot be charged until field wiring has been
completed.
Refrigerant may only be charged after performing the leak
test and the vacuum pumping.
W he n c ha r gin g a syst e m , c a r e s hal l b e t a k e n t ha t i t s
maximum permissible charge is never exceeded, in view of
the danger of liquid hamme r .
Chargin g wit h a n unsuitabl e substanc e ma y caus e
explosion s an d accidents , s o alway s ensur e tha t th e
appropriate refrigerant is charged.
Refrigerant containers shall be opened slowl y .
Always use protective gloves and protect your eyes when
charging refrigerant.
CAUTION
1
2
4
3
5
6
Fig.6-7
Using the vacuum pump
Loosen and remove the maintena n ce nuts of stop valves A
and B, and conn e ct the charge hose of the manifold valve to
the service port 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 value completel y .
T ur n o n th e vacuu m pump . A t th e beginnin g o f pumping ,
loosen the maintenance nut of stop valve B a little to check
whether the air comes in (the sound of the pump changes,
and the indicator of compound meter turns below zero). Then
fasten the maintenace nut.
When the pumping has finished, close the Lo-lever of the
manifol d valv e completel y an d tur n o ff th e vacuu m
pump. Vaccum to 500 microns.
Loosen and remove the cap of stop valves A and B to open
stop valve A and B completel y , then fasten the cap.
Disassemble the charge hose from the service port of stop
valve A, and fasten the nut.
7
Fig.6-6
Fig.6-5
Always use a charge hose for service port connection
Afte r tightenin g th e cap , chec k tha t n o refrigeran t leak s
arepresent.
service port
cap
maintenance nut
Stop valve
Gas side
Liquid side
hexagon hole shaft seal
Outdoor
unit
Indoor
unit
A
C
D
B
CAUTION
Pressure meter Multi-meter
-76 cmHg
Lo-lever
Lo-lever
Charge hose Charge hose
V acuum pump
Hi-lever
Manifold valve
CAUTION
The drain pipe of indoor unit must be heat insulated, or it will
condense de w , 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.
7. 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.
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.
CAUTION
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