Lennox CAMH025SM1M Installation, Operating And Maintenance Manual page 38

3.- COMMISSIONING AND OPERATION
3.2.- PRELIMINARY CHECKS DURING START UP.
The unit must be installed in accordance with local safety
codes and regulations and can only be used in a well ven-
tilated area. Please read carefully the manufacturer's ins-
tructions before starting this unit.
All work on the unit must be carried out by a qualifi ed
and authorised employee.
Non-compliance with the following instructions may result
in injury or serious accidents.
Work on the unit:
The unit shall be isolated from the electrical supply by dis-
connection and locking using the main isolating switch.
Workers shall wear the appropriate personal protective
equipment (helmet, gloves, glasses,etc.).
Electrical system:
Work on electric components shall be performed with the
power off (see below) by employees having valid electri-
cal qualifi cation and authorisation.
Electrical connections can become loose during transport.
Please check them before starting-up the unit Compres-
sors with specifi c rotation direction. Check the correct
rotation direction of the fan before closing the compressor
circuit breakers. If the direction is incorrect, the phases
must be reversed at the head of the main switch.
Refrigerating circuit(s):
After more than 12 hours of power cut, the cranckcase
heater (compressor) should be powered for 5 hours be-
fore any return to service. Non-compliance with this ins-
truction can cause deterioration of the compressors.
Monitoring of the pressures, draining and fi lling of the sys-
tem under pressure shall be carried out using connections
provided for this purpose and suitable equipment. To pre-
vent the risk of explosion due to spraying of coolant and
oil, the relevant circuit shall be drained and at zero pres-
sure before any disassem bly or unbrazing of the refrige-
rating parts takes place.
• 37 •
To evoid the risks of explosion, cooling gases elements
and oil, shall check, before carrying out any dismant-
ling or dissamble any cooling elements, that the circuit
that cause the explosion and its pressure is zero.
There is a residual risk of pressure build-up by degas-
sing the oil or by heating the exchangers after the circuit
has been drained. Zero pressure shall be maintained
by venting the drain connection to the atmosphere on
the low pressure side.
The brazing shall be carried out by a qualifi ed brazier
and shall comply according to code ASME section IX
following the procedures specifi cation.
Before the start up:
- Raise the system to the test maximum pressure (see
fi rmplate).
- Check the correct behaviour of the high pressure de-
vice.
- Check the components general condition and circuit
piping.
Spare parts:
In order to maintain CE marking compliance, replace-
ment of components shall be carried out using spare
parts, or using parts approved by Lennox.
Only the coolant shown on the manufacturer's name-
plate shall be used, to the exclusion of all other products
(mix of coolants, hydrocarbons, etc.).
CAUTION:
In case of fi re, cooling circuits can
cause an explosion and spray
coolant gas and oil.
Installation Manual • COMPACTAIR ADV IOM-MIL157E-0418