Tecumseh SILENSYS SILAJ2432P Instrucciones Originales página 13

The total load of the system must not cause the liquid
tank to fill completely. Variations in liquid volume due
to variations in ambient temperature must be such as
to maintain a free gas volume.
Pre-start check list
The condensing temperature, at Mid point, must not exceed 63°C
during the transition periods. Keep the condensing unit away from any
heat source.
Make sure that:
• Check that the cable gland are properly tightened before starting the
unit.
• Ensure that there isn't flammable refrigerant inside the electrical box.
• The power supply voltage is compatible with that of the condensing
unit.
• Electrical safety devices are set correctly for the condensing unit.
• Service valves are fully open.
• Operation of crankcase resistor or heating belt. Make sure that the
latter is always supplied with electricity when the compressor is
switched off.
• Free rotation of condenser fan impeller.
• Inspect system for any faults.
• The refrigeration system must be designed in such a way as not to
allow the compressor to start up more than 6 to 8 times per hour.
• Check that safety pressure switches are set and triggered.
Check list after start up
After the installation has been running for several hours, carry out the
following checks.
• Fan panel is running
• Voltage and current drawn by the condensing unit are correct.
• Direction of rotation of Scroll and Rotary compressors.
• Pressure switch adjustment.
• High and low operating pressures of the installation are correct.
• Fan blades are rotating freely.
• Superheat and sub cooling.
• Superheat and sub cooling.
• Oil level check for multi piston compressors.
The system is checked again for leaks. For remote installation,
refer to the 'recommendations of use handbook'.
Make sure that the installation is running smoothly.
Carry out a general inspection of the installation (e.g. cleanliness,
vibration and/or unusual noises). Ensure the settings and the functions
of the electrical circuits arecorrect.
The lack of refrigerant may be characterized by:
• High and low pressure values that are too low,
• An evaporator that is partially frozen,
• The presence of bubbles on the sight glass.
The excess of refrigerant may be characterized by:
• A high pressure value that is too high,
• Over consuming compressor,
• Important sub cooling,
• A liquid return.
5.4. Control
The rotational speed of the fan(s) is controlled by a pressure actuated
fan speed control. Its function is to:
• Prevent an excessive drop in condensing pressure in winter which
would adversely affect the correct operation of the expansion valve,
SILENSYS ADVANCED HEAT RECOVERY
• Further reduce noise levels when the ambient temperature allows.
See Appendix 6 for setting options.
Terminals 1 and 2 are provided on the unit to control compressor
operation.
They also allow the use of a control box and pump-down operation.
6. SERVICING AND MAINTENANCE
Maintenance and commissioning of the unit must be carried out by
people qualified and trained, according to the regulations in force in the
country where the refrigeration unit is installed.
Unauthorized modifications to Silensys® Advanced condensing units are
prohibited. Authorization from Tecumseh must be obtained prior to any
modification whatsoever.
Any faulty part must be replaced with a genuine spare part. In order
to maintain the low noise levels of the condensing unit over time, we
recommend replacing the anti-vibration mounts and/or isolating pads
as soon as any change in the noise or vibration level of the unit is
noticed.
Connections, fan and compressor compartments can be accessed from
either the side door panel or the front of the unit, without removing
the lid.
6.1. Condenser
The condenser and the condensing unit should be cleaned at least once
a year. Access from the inside of the unit can be gained by removing
the fan cover.
6.2. Condenser fan replacement
Replace the fan (and any condenser) with the model recommended by
Tecumseh.
6.3. Replacing the compressor
In the case of a replacement of a compressor AJ², refer to Appendix 9.
A damaged compressor can potentially pollute the oil of the refrigerating
circuit. Then Tecumseh advises to clean this refrigerating circuit.
6.4. Caution when working on service valves
please
Each time a valve is removed from its support, make sure that the
thread is in good condition and change the seal located in the groove
of the swivel nut.
Tightening torques are defined in §4.7 Refrigeration connections.
6.5. Leak checking and periodical inspections
Use the appropriate equipment to empty or refill the system (recovery
machine, goggles, gloves etc.).
A leak detection check must be carried out according to the local
regulations or at least once a year.
6.6. Electrical connections, running pressures and
temperatures checking
Systematically check the tightening of all screwed electrical components.
Check regularly:
• Safety and control devices,
• The condition of electrical and refrigeration connections (e.g. for any
loosening or oxidation),
• Operating conditions,
• The mounting of the condensing unit on its base,
• The housing fixings (no vibration),
• Crankcase heater operation.
• While maintenance, pay attention to the electrical box sealing. No
ingress of refrigerant or liqud should be possible.
INSTALLATION INSTRUCTIONS
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