Lennox ROOFTOP FLEXY FXK 55, Installation, Operating And Maintenance Manual

Page: 5 / 106

IMPORTANT NOTICE – Safety instructions
FLEXYII_WSHP-IOM-1307-E - 3 -
All FLEXY II Units are compliant with the PED directive 97-23/CE
The following note must be followed carefully
All work on the unit must be carried out by a qualified 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 disconnection and locking using the main isolating switch.
•
Workers shall wear the appropriate personal protective equipment (helmet, gloves, glasses, etc.).
Work on the electrical system:
•
Work on electric components shall be performed with the power off by employees having valid electrical qualification and
authorisation.
Work on the refrigerating circuit(s):
•
Monitoring of the pressures, draining and filling of the system under pressure shall be carried out using connections provided
for this purpose and suitable equipment.
•
To 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 refrigerating 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 qualified brazier. The brazing shall comply with standard NF EN1044 (minimum 30%
silver).
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 fire, refrigerating circuits can cause an explosion and spray coolant gas and oil.
T
RANSPORT
– H
ANDLING
:
- Never lift the unit without forklift protections
- Remove the forklift protection before installation
- An approach ramp must be installed if the unit’s installation requirements tell that it's necessary to reach the main switch.
This recommendation is valid for installations in general and in particular for return and curbs. It’s also valid to reach other parts
of the unit: filters, refrigerant circuit, etc…
-
It’s advised to fix curbs and roofcurbs to the unit
- Whatever the supply configuration is, respect a minimal duct’s length of 2m before any elbow or any duct’s section change.
C
OMMISSIONING
:
- It must only be carried out by trained refrigeration engineers.
- Don’t forget to open the insulation valve on the liquid line before starting the unit
F
ILTERS
:
- Do the filters fire classification’s choice according to local regulations.
F
ANSTART
:
- Any adjustment has to be done power stopped.
G
AS
:
- Any work on gas module must be carried out by qualified personnel
- A unit with gas module must be installed in accordance with local safety codes and regulations and can only be used in
planed installation conditions for outdoor.
- Before commissioning this type of unit, it’s mandatory to ensure that the gas distribution system is compatible with the
adjustment and settings of the unit.