Control; Servicing And Maintenance; Condenser; Replacing The Fan - Tecumseh SILENSYS SILAJ2432P Original Installation Instructions

- 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
'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,
- Further reduce noise levels when the ambient temperature
allows.

6. SERVICING AND MAINTENANCE

Maintenance and commissioning of the unit must be carried out
by people qualified and trained
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. Replacing the fan

- Switch off and isolate the condensing unit.
- Disconnect the fan motor cable from the junctionbox.
- Undo the 4 mounting bolts.
- Take off the fan motor assembly.
- Replace the motor-driven fan and its capacitor (size S model).

6.3. Replacing the compressor

In the case of a replacement of a compressor AJ²,
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
Each time a valve is removed from its support, make sure that
the thread is in good condition and change the seal located in
please refer to the
| Installation Instructions
the groove of the swivel nut.
Tightening torques are defined in appendix.

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.
- Check all cable glands for tightness before starting up the unit.
See appendix 5.

6.7. Filter drier

Silensys® Advanced condensing units are all fitted with a brazed
filter drier.
Replacement filter drier selection:
When changing the filter drier, ensure that it is replaced with an
equivalent in capacity and pressure drop and with the correct
direction of flow.

6.8. Safety devices

The pressostat fitted in the unit is specific to run with the
authorised A2L refrigerants. In case of replacement, consider the
current, the technology of cut out, of the model installed by
Tecumseh in the SILENSYS ADVANCED unit.
The pressure setting made by the manufacturer must be controlled
and adjusted to be in accordance with the local regulation in force.
Compressor compartment Panel fan
Air flow goal is to evacuate the refrigerant out of the compressor
compartment in case of leakage, to shorten the time of flammable
refrigerant presence around electrical components.
1
The limits of use indicated
on the component must
be respected to ensure
that it is not considered a
source of ignition.