P/N 9FQ6P11007900_B 2-11
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
Open Vertical Merchandisers
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.
CHARGING
A calibrated scale with +/-2 gram accuracy
must be used to charge the system. The charge
amount is shown on the serial plate. Only R-290
grade refrigerant can be used. Standard propane
does not meet the purity/moisture content of
R-290, and therefore cannot be used to charge
cases.
No gas charge adjustments are allowed. When
connecting hoses between the refrigeration
system, manifold gauges, and refrigerant
cylinder, ensure that the connections are secure
and there are no potential sources of ignition
nearby. Ensure that contamination of different
refrigerants does not occur when using charging
equipment.
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
To Next Page
Loading...
