Convection Cooling - U-Line U-3018RFOL-00 Service Manual

Convection Cooling

All 3000 series units are equipped with an advanced convection
cooling system. Convection cooling stabilizes cabinet temperature,
cools product faster and increases energy efficiency.
Evaporator Fan
The evaporator fan is responsible for circulating warm air from the
refrigeration zone, past the evaporator and back into the refrigerated
zone.
The evaporator fan is factory set to have a 1 minute delay at the
beginning of a cooling cycle. This delay gives the evaporator time to
cool properly before warm air is passed over it. The fan will continue
to run for an additional 2 minutes at the end of a cooling cycle. Fan
delay times can be modified through the service menu. See "Fan
Delay" on page 17.
Evaporator fan operation is also determined by door switch state. If
the door switch circuit opens the fan will stop. When the door
switch circuit is closed the fan will either continue running with the
cooling cycle, or if not currently cooling, the fan will run for 1 minute
to circulate air and clear any condensation that may have appeared on
glass doors and shelves.
Note: If the unit is set to sabbath mode the evaporator fan will no
longer respond to the state of the door switch.
In order to operate efficiently the evaporator fan blade and vents
should be unobstructed and free of any dust buildup.
Evaporator Fan Replacement
Should the evaporator fan need to be replaced follow the steps
below.
1. Remove any product from the unit.
2. Disconnect power to the unit.
3. Remove upper back panel.
Back Panel
4. Disconnect fan electrical connection
Electrical
Connection
Upper
Fan
5. Remove insulating foam from refrigerant line pass-through hole.
6. Remove internal shelving, bins, or wine racks.
7. Remove shelf clips, rack, or bin mounting rails.
8. Remove thermistor housing.
9. Remove two evaporator plate screws from top of evaporator
plate.
10. Grasp evaporator fan shroud and gently pull plate away from the
rear of the unit.
11. While pulling the evaporator plate clear of the unit, it may be
necessary to use your free hand to manipulate the fan plug end
through the pass-through hole.
12. Remove the 4 screws mounting the fan shroud to the evaporator
plate.
Note: When installed, arrow on fan points away from evaporator.
13. Remove and replace fan. Take special care to properly route fan
wire.
NOTICE
Fan must be oriented to pull air in through lower evaporator
plate vents and push air out at fan mounting location.
14. Installation is the reverse of removal. Before replacing back panel
fill refrigerant line pass-through hole with sealant gum.
u-line.com
General Information
Evaporator Plate
Screws
Thermistor
Housing
23