Doosan DX225LC, Руководство пользователя

Страница: 116 / 136

Electrical System
Page 115
SP000935
2. Check system for vacuum leak.
Allow system to sit for 10 minutes and check whether the
system is holding the pressure. If the pressure has
dropped, it must be repaired before proceeding to the next
step.
3. Vacuuming Procedure
If the system is holding the pressure and it has not
changed for 10 minutes, vacuum out the system for an
additional 20 minutes.
A. Turn on the vacuum pump and slowly open both
valves.
B. Allow vacuum pump to run for additional 20 minutes
until the low-pressure gauge dial reads approximately
750 mmHg.
C. Close both valves and stop the vacuum pump.
4. Installation of Refrigerant Container
A. Before mounting valve on the container, make sure
the handle is in the counterclockwise most position,
with the puncture pin retracted and the mounting disk
is in the raised position.
B. Attach the manifold gauge center hose to the valve
assembly.
C. Turn the disk in the clockwise direction and securely
mount valve onto refrigerant container.
D. Turn the valve handle in the clockwise direction and
puncture the container seal with the pin.
E. Once the can has been punctured, turn the handle in
the counterclockwise direction so the refrigerant can
flow into the manifold gauge center hose. At this time,
do not open the low and high-pressure valves of the
manifold gauge.
F. Press the manifold gauge low side valve to eliminate
the trapped air in the hose.
HDA6069L
Figure 99
1
2
3
HDA6070L
Figure 100
Reference
Number
Description
1 Handle
2 Hose Connection
3 Mounting Disk