Stoelting O231, Руководство по обслуживанию

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A. REFRIGERANT RECOVERY
1. Disconnect the machine from electrical supply
before removing any panels for servicing.
2. Remove all panels.
3. Connect the recovery unit to the suction and
discharge service valves of the compressor.
4. Connect power to the machine.
5. Turn the machine on by pressing the Main Power
Off/On button.
6. Press the right arrow, SET, then the SEL button to
access the technician level on the control.
7. Activate the Liquid Solenoid on the left side or the
right side. Activating the solenoids is done through
the Left Output Control or Right Output Control
menus which are located under Utilities in the
Testing and Manual Operation screen. Refer to
Section 4 for details.
8. Operate the recovery unit per manufacturer’s
instructions
9. After recovery is complete, deactivate the solenoid
by exiting the Testing and Manual Operation
screens.
B. EVACUATING THE REFRIGERATION SYSTEM
1. Close any open ports in the refrigeration system.
2. Connect a vacuum gauge to one of the Schrader
valves next to an evaporator.
3. Connect the evacuation unit to the suction and
discharge service valves of the compressor.
4. Connect power to the machine.
5. Turn the machine on by pressing the Main Power
Off/On button.
6. Press the right arrow, SET, then the SEL button to
access the technician level on the control.
7. Activate the Liquid Solenoid on the left side or the
right side. Activating the solenoids is done through
the Left Output Control or Right Output Control
menus which are located under Utilities in the
Testing and Manual Operation screen. Refer to
Section 4 for details.
8. Evacuate the system until the gauge reads 300
microns of mercury (300µ Hg) for 5 continuous
minutes.
10. If the system will not maintain a standing vacuum
test with the vacuum pump off (gauge increases
towards atmosphere), find the leak, fix it, and
evacuate again.
11. After evacuating is complete, deactivate the solenoid
by exiting the Testing and Manual Operation
screens.
5.3 REFRIGERANT CHARGING
Refer to the following procedures to properly charge the
refrigeration system. Stoelting recommends liquid refriger-
ant charging.
NOTE
For qualified service personnel only. Anybody work-
ing with refrigerants must be certified as a Techni-
cian TYPE I as required by 40 CFR 82 Subpart F
and hold all State and/or local refrigerant handling
certifications. In addition, all handling, storage, and
disposal of refrigerants must be in accordance with
Environmental Protection Agency (EPA) guidelines
and standards and all State and local guidelines and
standards.
A. Ensure the electrical supply has been removed
before continuing.
B. If the system has been opened or if there was a
leak, refer to Section 5.2 - Refrigerant Recovery
and Evacuation to evacuate the system prior to
charging.
C. Refer to machine’s information plate for total charge
requirements.
NOTE
The refrigeration system of the O231 is critically
charged. Be sure to charge the system to the weight
listed on the machine’s information plate.
D. For liquid refrigerant charging, connect refrigerant
cylinder to the discharge Schrader valve of the
compressor.
E. Energize the solenoid valve.
F. Add the proper amount of refrigerant according to
the machine’s information plate.
WARNING
Hazardous voltage
Make sure the machine is off when disassembling
for servicing. The machine must be disconnected
from electrical supply before removing any access
panel. Failure to disconnect power before servicing
could result in death or serious injury.
CAUTION
The solenoid valves must be energized to allow all
refrigerant to be recovered and to prevent injury when
brazing.