Sub-Zero 700-3 BASE, Technical & Service Manual

Page: 81 / 114

Component Access/Removal
Integrated
(700-
3
BASE)
Series
7-23
#3758424 - Revision B - December, 2005
Evaporator / Heat Exchanger Assembly Removal
(700BC/I-3, 700BF/I-3 Only)
The evaporator / heat exchanger assembly was
installed into the unit by inserting the heat exchanger
down through the hole at top left front of sump. As the
heat exchanger is fed through the hole, the side brack-
ets of the evaporator slide down into channels in sump
and control board enclosure. Tubing insulation is then
installed over the heat exchanger before it is coiled and
attached to the back of unit tray area with a P-clamp
and screw. Then, the heat exchanger is attached to the
compressor and filter-drier.
NOTE: Before attempting to remove the evaporator /
heat exchanger assembly, evacuate the refrigerant from
the sealed system.
To remove the evaporator / heat exchanger assembly,
the kickplate/grill will need to be removed first. Then,
extract the two screws that secure the unit tray to the
unit and slide the tray out (See Figure 7-49).
NOTE: It will be necessary to disconnect the compres-
sor electrical leads in order to pull the tray out far
enough to remove the heat exchanger.
To remove the evaporator/heat exchanger assembly
(See Figures 7-51, 7-52 and 7-53):
1. Since evaporator/heat exchanger assembly being
removed will be scrapped, use a tin snips or similar
tool to cut heat exchanger near hole in sump.
2. Disconnect all electrical leads of components
attached to evaporator and lift evaporator from
sump.
NOTE: There may be a Y-harness between the ther-
mistor electrical connections, with wires exiting through
the heat exchanger hole in sump. This is for factory
test purposes and can be removed or bypassed.
3. Cut suction line approximately 2” (51 mm) from
compressor.
4. Since filter-drier will be replaced, cut drier inlet tube
approximately one inch (25 mm) from drier, leaving
capillary tube attached.
5. Extract screw holding heat exchanger and P-clamp
to rear of unit tray area.
6. Pull heat exchanger down through hole at top left
front of sump and out of unit tray area.
NOTE: When installing replacement evaporator / heat
exchanger assembly, be sure to thoroughly clean tubing
before brazing.
NOTE: After installing replacement evaporator / heat
exchanger assembly, apply a bead of silicone around
heat exchanger where it exits through hole in sump.
Figure 7-52. Cut Suction line at compressor
Cut here
Compressor
Figure 7-53. Cut Inlet at Filter-Drier
Cut cable tie
Cut 1” from drier
Figure 7-51. Cut Suction & Capillary Tube at Evap.
In sump, cut tubing with tin snips or similar tool.
Leave capillary tube
attached to drier