Lennox AQUALEAN AWC Application Manual page 28

COMMISSIONING AND OPERATION
4.2.- PRELIMINARY CHECKS AT STARTUP
The unit must be installed in accordance with local safety codes
andregulations and can only be used in a well ventilated area.
Please readcarefully the manufacturer's instructions 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 (hel-
met, gloves, glasses,etc.).
Electrical system:
Electrical connections can become loose during transport.
Please check them before starting-up the unit Compressors
with specifi c rotation direction. Check the correct rotation direc-
tion 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. Work on electric components shall be
performed with the power off (see below) by employees having
valid electrical qualifi cation and authorisation.
Refrigerating circuit(s):
After more than 12 hours of power cut, the cranckcase heater
(compressor) should be powered for 5 hours before any return
to service. Non-compliance with this instruction can cause dete-
rioration of the compressors.
Monitoring of the pressures, draining and fi lling of the system
under pressure shall be carried out using connections provided
for this purpose and suitable equipment.
• 26 •
T
o prevent the risk of explosion due to spraying of coolant
and oil, the relevant circuit shall be drained and at zero
pressure before any disassembly or unbrazing of the refri-
gerating parts takes place.
There is a residual risk of pressure build-up by degassing 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. The
brazing shall comply according to code ASME section IX fol-
lowing the procedures specifi c.
Before starting up
- Test the circuit to the maximum working pressure(see the
nameplate)
- Verifi fy the operation of the high pressure swich.
- Check the piping and the components of the refrigerant
circuit.
Replacing components:
In order to maintain CE marking compliance, replacement of
components shall be carried out
using spare parts, or using parts approved by Lennox.
Only the coolant shown on the manufacturer's nameplate
shall be used, to the exclusion of all other
products (mix of coolants, hydrocarbons, etc.).
CAUTION:
In the event of fi re, refrigerating
circuits can cause an explosion
and spray coolant gas and oil.
AQUALEAN - AWC/AWH - MIL118E-1407 / 10-2013