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20 ElEctrIcal / rEfrIgEratIon / controllEr
REPLACING REFRIGERATION SYSTEM
COMPONENTS
STEPS TO RECOVER REFRIGERANT
1. Make sure you are in a well ventilated area before
making any service or repair to the refrigeration
system.
2. Disconnect all power sources from the system.
Some systems may have more than one plug or
power supply.
3. Tap system with line tap valves, attaching gauges to
the high and low sides of the system.
4. Connect hose to an evacuated recovery tank.
Open refrigeration gauges and recovery tank.
5. With the suction valve in vacuum, the refrigerant will
be recovered into the recovery tank.
6. Once recovered, close the tank valve and remove
the guage from the tank and connect nitrogen tank
to the system to purge it with nitrogen.
7. Pull vacuum to a minimum of 200 microns or
lower.
Only Hussmann service technicians or
technicians qualied to handle R-290
(propane) refrigerant should service or
repair this R-290 (propane) equipment
Failure to follow instructions can result
in an explosion, death, injury and
property damage.
refrigeration
line tapping
valve
This refrigeration system uses hot
gas defrost and incorporates a Normal
Closed Solenoid. In order to remove
all the refrigerant for service, the valve
must be held open while the refrigerant
is being evacuated. Failure to remove
all the refrigerant can cause a re or
explosion.
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