IM 1287-6 • REBEL APPLIED ROOFTOP 90 www.DaikinApplied.com
Leak Mitigation System and Sensors
For Additional Instructions on how to operate the Leak
Mitigation System including how to activate a manual
test of the Leak Mitigation System, refer to the unit
controller manual
WARNING
This equipment is equipped with a Refrigerant Leak Detection System. Only
components and Refrigerant Detection Sensors specied by Daikin Applied
may be used for replacement and maintenance.
WARNING
Always ensure the Refrigerant Detection Sensors installed in the equipment
are free of debris and the inlet is not blocked. If replacing a Refrigerant
Detection Sensor always install in the identical orientation as the original
sensor.
Figure 162: Sample Refrigerant Detection Sensor
NOTE: Identify the sensor inlet marked “Do Not Block Inlet”.
WARNING
Auxiliary devices which may be a Potential Ignition Source shall not be
installed in the duct work. Examples of such Potential Ignition Sources are
hot surfaces with a temperature exceeding 700 °C and electric switching
devices.
WARNING
The unit must be stored and/or located to prevent mechanical damage of
the refrigeration system. Do not store the unit near sources of open ame,
electrical switching devices, or hot surfaces above 700°C. If the unit is
stored indoors the storage area should be larger than the Minimum Room
Area specied in this manual. The storage space should be well ventilated
and not allow for the stagnation of leaked refrigerant. Failure to do so may
result in a re or explosion hazard.
WARNING
Only auxiliary devices approved by Daikin Applied or declared suitable for
installation with R-32 shall be installed in the connecting ductwork.
Performing Service
Remove Ignition Sources
Always perform a safety check of the area to ensure the
risk of ignition is minimized before servicing the unit.
Personnel Awareness
Inform maintenance sta and others working in the
local area of the nature of work being carried out. Only
personnel attending to the refrigerant system should be
present.
Check for Presence of Airborne Refrigerant
Check the area with an appropriate refrigerant detector
prior to and during work to ensure all personnel are
aware of potentially toxic or ammable gases in the air.
Ensure that the leak detection equipment being used is
suitable for use with all applicable refrigerants, i. e. non-
sparking, adequately sealed or intrinsically safe.
Presence of re extinguisher
If any hot work is to be conducted on the refrigerating
equipment or any associated parts, appropriate re
extinguishing equipment should be available to hand.
Have a dry powder or CO2 re extinguisher adjacent to
the charging area.
No Ignition Sources
No person carrying out work in relation to a
REFRIGERATING SYSTEM which involves exposing
any pipe work shall use any sources of ignition in such
a manner that it may lead to the risk of re or explosion.
All possible ignition sources, including cigarette
smoking, should be kept suciently far away from the
site of installation, repairing, removing and disposal,
during which refrigerant can possibly be released to the
surrounding space. Prior to work taking place, the area
around the equipment is to be surveyed to make sure
that there are no ammable hazards or ignition risks. “No
Smoking” signs shall be displayed.
Ventilated area
Ensure that the area is in the open or that it is
adequately ventilated before breaking into the system
or conducting any hot work. A degree of ventilation shall
continue during the period that the work is carried out.
Checks to the refrigerating equipment
Where electrical components are being changed,
they shall be t for the purpose and to the correct
specication. At all times the manufacturer’s
maintenance and service guidelines shall be followed.
If in doubt, consult the manufacturer’s technical
department for assistance.
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