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Refrigerant Charging
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.
NOTE: Always weigh in refrigerant based on the model nameplate.
Warning:
•
Ensure that contamination of different refrigerants does not occur when using charging equipment.
•
Hoses or lines shall be as short as possible to minimise the amount of refrigerant contained in them.
•
Cylinders shall be kept in an appropriate position according to the instructions.
•
Ensure that the REFRIGERATING SYSTEM is grounded prior to charging the system with refrigerant.
•
Label the system when charging is complete (if not already).
•
Extreme care shall be taken not to overfill the REFRIGERATING SYSTEM.
•
Prior to recharging a system, it shall be pressure-tested with the appropriate purging gas. The system shall be leak-tested on
completion of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the site.
•
NOTE: Because the refrigerant system is a sealed system, service process tubes will have to be installed. First install a line tap and
remove refrigerant from system. Refer to the Refrigerant removal section of this manual for procedures. Make necessary sealed
system repairs and vacuum system.
The acceptable method for charging the sealed system is the Weighed in Charge Method. The weighed in charge method is applicable
to all units. It is the preferred method to use, as it is the most accurate.
The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair, compressor
replacement, or when there is no refrigerant charge left in the unit. To charge by this method, requires the following steps:
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R-32 SEALED SYSTEM REPAIRS
Refrigerant
Safety Group
A2L
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