Risk Analysis And Hazardous Situations According To 97/23/Ce Directive - Lennox WA Series Installation, Operating And Maintenance

RISK ANALYSIS AND HAZARDOUS SITUATIONS ACCORDING TO 97/23/CE DIRECTIVE

N° Event
Violent Chocks, Static or
1A
Dynamic Loads applied
Unit not installed properly or
2A
leveled to the ground
Unsuited hydraulic or
3A
refrigeration pipe-work
Outdoor temperature below
4A
freezing
Circuits exposed to an unusual
5A
heat source.
Unusual increase in the
temperature of the Chilled
6A water return to the evaporator
or the hot return water to the
condenser
Possibility of a unit being hit by
7A
lightning
Installation - Operation - Maintenance manual (IOM) • AIR COOLED CHILLERS & SPLIT UNITS - 0105-E
Effect Risk
Appearance of cracks, distortions, Leaks, liquid or gas projections,
possibility of rupture Metal parts projections.
Unusual stress in the frame
leading to possible and strains Leaks
vibrations and cracks
Unusual stress on the pipe-work
leading to possible and strains Leaks
vibrations and cracks
Partial or complete destruction of
Strains, vibrations and cracks,
the circuit, liquid/gas could be
pipe bursting.
thrown out of the unit
Modification of the mechanical
Partial or complete destruction of
properties of certain materials with
the circuit, liquid/gas could be
a risk or rupture or pipe bursting,
thrown out of the unit
leaks or cracks appearing.
Increase of the refrigerant
pressure in the heat exchanger
Partial or complete destruction of
with a risk of exceeding the
the circuit, liquid/gas/metal parts
working pressure leading to
could be thrown out of the unit
possible strains, vibrations, cracks
and pipe or vessel bursting.
Partial or complete destruction of
Extreme heat, explosion, cracks. the circuit, liquid/gas/metal parts
could be thrown out of the unit
Actions to Eliminate the Risk
Only handling the units using the
chassis and lifting rings if available.
Level the machine during
commissioning. In the case where the
unit is installed on anti-vibration
mountings, all supporting points must
be used and the block hardness must
be selected according to the type of
units being installed.
Proper support and fitting of the pipe-
work on site.
Provide anti-frost protection (ei: Water
treated with Glycol, or trace heaters
along the pipe-work)
Recommended minimum and
maximum outdoor temperature–20°C
to 50°C during operation.
–30°C to 65°C during storage
Do not expose any part of the machine
to a naked flame
Maximum chilled water return
temperature: 45°C
Maximum hot return water
temperature: 50°C
Install a temperature limitation device
Provide an appropriate protection
against lightning.
Information to minimise the
Occurrence of a risk
Handling procedure shown in the
IOM supplied with the unit.
Indications on general mechanical
drawings in the technical guide
and the IOM supplied with the
unit.
Indications in the technical IOM
supplied with the unit.
Indications in the technical IOM
supplied with the unit.
Indications of the Min and Max
outdoor temperature on the unit
nameplate
Indications in the technical IOM
supplied with the unit.
Indications in the technical IOM
supplied
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