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2-12
ELECTRICAL / REFRIGERATION
Use dedicated hoses to service R-290 (propane) refrigeration systems . Hoses or lines should be as
short as possible to minimize the amount of refrigerant contained in them .
Ensure that the refrigeration system is properly grounded prior to charging the system with
refrigerant, to avoid the potential for static build-up .
Extreme care must be taken not to overfill the refrigeration system . After charging, carefully
disconnect the hoses, attempting to minimize the quantity of refrigerant released . Further leak
check the service ports, hoses, refrigerant tanks . The service ports shall be checked for leaks using a
hydrocarbon leak detector with a sensitivity of 3 grams/year (0 .106 Oz/year) leak rate .
Thoroughly leak check the service ports . If no leak is present, use a pinch-off tool to close the ends
of the service tubes before brazing them shut . Remove all service ports . If a Schrader valve is used
on the compressor service tube, it must be removed and the previous steps followed in order to
braze the service tube shut .
Component parts shall be replaced with like
components, and servicing shall be done by
factory authorized service personnel only, so
as to minimize the risk of possible ignition
due to incorrect parts or improper service.
P/N 9FQ6P11007900_B
Refrigeration lines are under pressure.
Refrigerant must be recovered before
attempting any connection or repair.
To avoid serious injury or death from electrical
shock, always disconnect the electrical power
at the main disconnect when servicing or
replacing any electrical component. This
includes, but is not limited to, such items as
doors, lights, fans, heaters, and thermostats.
U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
— LOCK OUT / TAG OUT —
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