RS5290000 Rev. 0 42 April 1998
Product Design
Refrigeration System
Compressor forces high temperature vapor into fan-
cooled tube and wire condenser where vapor is cooled
and condensed into high pressure liquid by circulation
of air across condenser coil. (See Refrigerant Flow
Diagram.)
High pressure liquid passes through molecular sieve
drier and into capillary tube. Small inside diameter of
capillary offers resistance decreasing pressure and
temperature of liquid discharged into evaporator.
Capillary diameter and length is carefully designed for
each system.
Capillary enters evaporator at top back. Combined
liquid and saturated gas flows through back to bottom
of coil and into suction line. Aluminium tube evaporator
coil is located in freezer compartment where
circulating evaporator fan moves air through coil and
into fresh food compartment.
Large surface of evaporator allows heat to be
absorbed from both fresh food and freezer
compartments by airflow over evaporator coil causing
some of the liquid to evaporate. Temperature of
evaporator tubing near end of running cycle may vary
from -25° to -32°C.
Saturated gas is drawn off through suction line where
superheated gas enters compressor. To raise
temperature of gas, suction line is placed in heat
exchange with capillary.
Nonelectronic Temperature Controls
Freezer compartment temperature is regulated by air
sensing thermostat at top rear of fresh food
compartment which actuates compressor. Control
capillary is inserted in well which routes capillary into
freezer. Control should be set to maintain freezer
temperature between -17° to -18°C.
Fresh food compartment temperature is regulated an
air damper control governing amount of refrigerated
air entering fresh food compartment from freezer.
Fresh food compartment temperature should be
between 3° and 4°C.
Electronic Control
Electronic control is not repairable. If any component
in control is faulty, entire control must be replaced.
NOTE: Repair or replace all faulty line voltage
components before testing or replacing
electronic control. Do not assume problems are
caused by electronic control system. Opened,
shorted, earthed or otherwise faulty line voltage
components (including power cord and wiring)
can create problems that appear to be caused
by electronic control.
Refrigerated Chiller Fresh Deli Drawer
Chiller Fresh system is a deli drawer in a sleeve.
Control on inner wall of fresh food compartment allows
freezer air to circulate into sleeve maintaining
temperature 4°C ±1° colder than fresh food
compartment.
Boot must be in place over air inlet. Set to maintain
desired temperature in deli drawer.
Beverage Chiller
Control on left inner wall of fresh food compartment
allows freezer air to circulate into beverage chiller
maintaining temperature up to 3°C colder than fresh
food compartment. Valve on outside wall of
refrigerator door allows freezer air to pass to beverage
chiller.
Fresh food compartment temperature can be affected
by additional cold air so freezer temperature control
may need adjustment after beverage chiller
temperature is set.
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit and discharge
capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures require power to be
connected. Ensure all earth wires are connected before certifying unit as repaired and/or operational.
WARNING
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