Movincool Office Pro 10, Руководство по обслуживанию, Страница: 47 / 56

TROUBLESHOOTING AND REPAIR
39
45º
TUBE
BURNER
BRAZING FILLER METAL
VERTICAL UP JOINT
Vertical Up Joint
A
F
B
D
E
C
Refrigeration Cycle Components
PART TO REPLACE DISCONNECT AT
COMPRESSOR ASSY A & D
CONDENSER D & C (Point C is located behind the Compressor)
SUCTION REGULATING VALVE B & E
EVAPORATOR ASSY C & A
CAPPILARY TUBE C & F
B. Removal of Refrigeration Cycle Components

CAUTION
1. Before any refrigeration cycle component can
be replaced, it is necessary to recover the
refrigerant using standard recovery proce-
dures and equipment.
2. To prevent oxidation, dry nitrogen should be
conducted (flow rate 1l/min) through the
pinch-off tube during any brazing operation.
3. During any component replacement involving
brazing, shield nearby parts with a steel plate,
asbestos, etc., to protect them from the flame.
(1) Evaporator
(2) Capillary tube
(3) Condenser
(4) Compressor
NOTE: Hold the compressor body, not the tube,
when carrying the compressor.
• USE OF DRY NITROGEN GAS
During brazing, the inside of the pipe under-
goes an oxidative reaction due to the brazing
flame. Introduce dry nitrogen gas (1l/min.;
adjust with the flow regulator) through the
pinch-off tube of the refrigerant cycle to
prevent oxidation.
NOTE: Take care not to allow dirt, water, oil, etc. to
enter into the pipe
• VERTICAL JOINT
Heat the whole brazed fitting to a proper
brazing temperature. Bring the brazing filler
metal into contact with the fitting so that the
brazing filler metal starts flowing by itself.
Stop heating the fitting as soon as the
brazing filler metal has flown into the clear-
ance. Since the brazing filler metal flows
easily into the portion heated to a proper
temperature, it is essential to keep the whole
fitting at a proper brazing temperature.