AHI Carrier Ceiling Type, Руководство по установке, Страница: 12 / 25

11
installation manual
2. Closing stop valve
1.
2.
Remove the cap and turn the valve clockwise with the
hexagon wrench.
Securely tighten the valve until the shaft contacts the
main bodyseal.
Make sure to tighten the cap securely.
For the tightening torque, refer to the table below.
Table 7-3
Tightening torque N M (Turn clockwise to close)
Stop
Valve size
Shaft (valve body)
Cap
(Valve lid)
Ø6.35
Hexagonal
wrench 4 mm
Ø9.52
Ø12.7
Ø15.9
Hexagonal
wrench 6 mm
Hexagonal
wrench 6 mm
Ø19
Maintenance nut
35 ～ 40
23
～
27
18 ～ 22
13.5
～
16.5 5
～
7
7 ～ 9
9
～
11
11 ～ 13
11.5
～
13.9
Additional Refrigerant Charge
7.2
Refrigerant cannot be charged until field wiring has been
completed.
Refrigerant may only be charged after performing the leak
test and the vacuum pumping.
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.
NOTE
CAUTION
If a negative result is gotten for R from Table 7-4, no
refrigerant needs to be added nor removed.
Additional refrigerant will be twice of R from Table 7-4 if
the indoor unit installed throttle assembly.
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.(
suitable for throttle outdoor unit)
1
2
4
3
5
6
Fig.7-9
Using the vacuum pump
Loosen and remove the maintenance nuts of stop valves A
and B, and connect 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 completely.
Turn on the vacuum pump. At the beginning of 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
manifold valve completely and turn off the vacuum
pump.Make pumping for 15 minutes or more and check that
the compound meter indicates -76cmHg(-1X10 Pa)
Loosen and remove the cap of stop valves A and B to open
stop valve A and B completely, then fasten the cap.
Disassemble the charge hose from the service port of stop
valve A, and fasten the nut.
5
7
Fig.7-8
Fig.7-7
Always use a charge hose for service port connection
After tightening the cap, check that no refrigerant leaks
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
Vacuum pump
Hi-lever
Manifold valve
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.
Table 7-4
Liquid tube(mm) R410A R22
Ø6.35
Ø9.52
Ø12.7
Ø15.9
Ø19
0.022kg/m×(L-5)
0.011kg/m×(L-5)
0.060kg/m×(L-5)
0.030kg/m×(L-5)
0.110kg/m×(L-5)
0.060kg/m×(L-5)
0.170kg/m×(L-5)
0.085kg/m×(L-5)
0.250kg/m×(L-5)
0.125kg/m×(L-5)
0.030kg/m×(L-5)
0.015kg/m×L
0.065kg/m×(L-5)
0.030kg/m×L
0.115kg/m×(L-5)
0.060kg/m×L
0.190kg/m×(L-5)
0.095kg/m×L
0.290kg/m×(L-5)
0.145kg/m×L
orifice in the indoorunit
orifice in the outdoorunit
orifice in the outdoorunit
orifice in the outdoorunit
orifice in the outdoorunit
orifice in the outdoorunit
orifice in the indoorunit
orifice in the indoorunit
orifice in the indoorunit
orifice in the indoorunit
NOTE:The number of bends is up to the length of the max
height drop.Usually for each 10m need a bend.
NOTE:the table above refer to the liquid tube.