9
Service Manual for Refrigerated Back Bar Model RUF 48
Door Replacement and Adjustment
General
Doors may become misaligned during shipment
but are easily adjusted.
1. For a low hanging door, use a 3/8” open wrench
to tighten, but do not over tighten, both top and
bottom hinge screws.
2. Place a flat screwdriver against outer side of
bottom hinge and lightly tap with a hammer
until door is properly aligned.
3. If necessary, place flat screwdriver against
inner side of top hinge and tap lightly with
hammer until door is properly aligned.
4. After properly aligning doors, tighten all hinge
screws securely.
Door Gasket Replacement
General
The door gasket has a retaining panel.
1. Remove gasket door panel and mounting
screws.
2. Remove gasket and door panel.
3. Position new gasket and panel on door.
4. Secure with mounting screws. Tighten screws
evenly around door panel.
Recharging Refrigeration System
General
To analyze the performance of a refrigeration
system, temperature readings are recorded and
converted to pressure readings using a standard
pressure/temperature chart.
When it is necessary to service a factory-sealed
refrigeration system and return it to its properly
sealed condition, strictly adhere to the following
approved procedure.
Tools
• Standard hand and refrigeration tools
• Refrigerant Type: R-134A, Refer to data tag
for amount
Charging Procedure
NOTE: Prior to refrigeration system service, special
care must be taken during the evacuation process to
remove air, moisture and other non-condensables
from the system. Duke Manufacturing recommends
the following triple evacuation method. Failure to
follow this procedure may result in poor refrigeration
system performance.
1. Evacuate system to 1500 microns.
2. Break vacuum to 2 psig with dry nitrogen. If
dry nitrogen is unavailable, use same type of
refrigerant as used in system.
3. Evacuate system to 500 microns.
The system is now ready to receive refrigerant
charge according to information on data plate.
CAUTION: Never use oxygen or acetylene in
place of dry nitrogen or refrigerant
for leak testing. A violent explosion
may result, causing property damage,
personal injury or death. When using
nitrogen to pressure test, always use
a pressure regulator. Failure to do so
will result in extremely high pressure
of the compressor or other system
components and result in property
damage, personal injury and death.
NOTE:
Prior to repair, ensure there is enough
process hose (approximately 12”) present to
complete the repair using the above procedure.
If not, install a new process hose before repair
sequence.
