R-32 Sealed System Repair; General Information - Friedrich Kuhl KCS12B10A Service Manual

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.
NOTICE:
Individuals working on these units must be EPA 608 Certified along with A2L Refrigerant Training.
Warning:
Refrigerant 32 cannot be used as a retrofit for R-410A refrigerant. The mixing of refrigerant across classes is prohibited. R-32 Is not
a drop in replacement for R-410A.
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.
Warning:
Job site should be examined for safety hazards such as flammable vapors, ignition sources, ventilation and confined spaces. Create
a safe perimeter with barriers and signs designating a flammable area.
Warning:
Work shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapor being present while
the work is being performed.
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. 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.
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 per EPA guidelines.
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