Install Instructions

Page 10mrcool.com
Safety Precautions
WARNING (for using R290/R32 refrigerant only, continued)
Flushing should be achieved by breaking the vacuum in the system with OFN and continuing to fill
until working pressure is achieved. Then, vent it into the atmosphere, before finally pulling
down to a vacuum. This process should be repeated until no refrigerant is present in the system.
When the final OFN charge is used, the system should be vented down until reaches atmospheric
pressure to enable work to be performed. This operation is vital if brazing is needed to make
repairs. Ensure that the outlet for the vacuum pump is not close to any potential ignition sources
and it has adequate ventilation available.
13. Charging Procedures
In addition to coventional charging procedures, the following requirements should be followed:
Ensure contaminations of different refrigerants does not occur when using
charging equipment.
Hoses or lines should be as short as possible to minimize the amount of
refrigerant contained within them.
Cylinders should be kept upright.
Ensure that the refrigeration is grounded prior to charging the system with refrigerant.
Label the system when charging is complete (if it is not already).
Extreme care should be taken to not overfill the refrigeration system.
Prior to recharging the system, it should be pressure tested with OFN. The system should
be leak tested upon completion of charging, but prior to decommissioning. A follow up leak
test should performed prior to leaving the site.
14. Decommisioning
Before completing the decommissioning process, it is essential that the technician is completely
and thoroughly familiar with all aspects of the equipment. It is recommended and good practice to
recover all refrigerants safely. Prior to completing this task, an oil and refrigerant sample should
be taken in case analysis is required prior to re-use of the reclaimed refrigerant. It is essential that
electrical power is available before this task can be completed. Following these steps:
1.) Become familiar with the equipment and its operation.
2.) Isolate the system electrically.
3.) Before attempting this procedure, ensure the following:
a.) Mechanical handling equipment is available, if required, for handling
refrigerant cylinders.
b.) All personal protective equipment is available and being used correctly.
c.) The recovery process is supervised at all times by a qualified person.
d.) Recovery equipment and cylinders conform to the appropriate standards.
4.) Pump down refrigerant system, if possible.
5.) If a vacuum is not available, construct a manifold so that the refrigerant can be
removed from various parts of the system.
6.) Ensure that the cylinder is positioned on the scales before recovery takes place.
7.) Start the recovery machine and ensure it is operated in accordance with the
manufacturer’s instructions.
8.) DO NOT overfill the cylinders (no more than 80% volume liquid charge).
9.) DO NOT exceed the maximum working pressure of the cylinder, not even temporarily.
•
•
•
•
•
•
•