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General Information
WARNING: Electrical Shock Hazard
Disconnect all power to the unit before starting maintenance. All electrical connections and wiring MUST be installed by a qualified
electrician and conform to all codes which have jurisdiction. Failure to do so can result in property damage, severe electrical
shock or death.
WARNING: This Product uses R-32 Refrigerant
Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacturer.
When not installed, the appliance shall be stored in a room without continuously
operating ignition sources (for example: open flames, an operating gas appliance or
an operating electric heater.
Do not pierce or burn.
Be aware that refrigerants may not contain an odor.
WARNING: Refrigeration System under High pressure
Do not puncture, heat, expose to flame or incinerate. Only certified refrigeration technicians should service this
equipment. R32 systems operate at higher pressures than R22 equipment. Appropriate safe service and handling
practices must be used.
Warning:
Prior to beginning work on systems containing FLAMMABLE REFRIGERANTS, safety checks are necessary to ensure
that the risk of ignition is minimized.
Work shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapour being present while the
work is being performed
General Work Area: All maintenance staff and others working in the installation area shall be instructed on the nature of work being
carried out. Work in confined spaces as defined by the Occupational Safety And Health Administration shall be avoided.
Check for presence of refrigerant:
•
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of
potentially toxic or flammable atmospheres.
•
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.
•
Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide
torch (or any other detector using a naked flame) shall not be used.
•
The following leak detection methods are deemed acceptable for all refrigerant systems:
1. Electronic leak detectors may be used to detect refrigerant leaks but, in the case of FLAMMABLE REFRIGERANTS, the
sensitivity may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)
Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. Leak detection equipment
shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed, and the appropriate
percentage of gas (25 % maximum) is confirmed.
2. Leak detection fluids are also suitable for use with most refrigerants but the use of detergents containing chlorine shall be
avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work.
NOTE: Examples of leak detection fluids are:
•
Bubble Method
If a leak is suspected, all flame sources shall be removed/extinguished.
If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated
(by means of shut off valves) in a part of the system remote from the leak.
Presence of fire extinguisher: If any hot work is to be conducted on the refrigerating equipment or any associated parts, a class ABC
Rated fire extinguishing equipment shall be available to hand. Have a class ABC Rated fire extinguisher adjacent to the charging area.
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R-32 SEALED SYSTEM REPAIR
Refrigerant
Safety Group
A2L
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