Sub-Zero 700 Service Manual page 24

Component Removal
Lower Compartment Heat Exchanger Removal
The lower compartment heat exchanger is behind the
switch enclosure and passes down through a hole in
the back right corner of the lower compartment floor.
NOTE: Before attempting to remove a heat exchanger,
evacuate the refrigerant from the sealed system.
To remove the lower compartment heat exchanger, the
following components must first be removed: both draw-
er assemblies, left side drawer slides, heat exchanger
cover, lower evaporator cover, switch enclosure and the
kickplate/grille. The unit tray will also need to be slid
out.
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.
1. Begin removing heat exchanger by cutting the inlet
and outlet tubes at evaporator.
2. Cut the suction line approximately two inches from
compressor. (See Figure 7-56)
3. Since the filter-drier will be replaced at the same
time, cut drier inlet tube approximately one inch
from drier, leaving capillary tube attached.
Figure 7-57)
4. The heat exchanger will be scrapped, so use a tin
snips or similar tool to cut heat exchanger near hole
in floor of the lower compartment.
5. Pull the pieces of heat exchanger out and clear the
Hot-Melt away from hole.
NOTE: To avoid damaging the unit from the brazing
torch flame, remove the evaporator from the compart-
ment and attach the new heat exchanger to the evapo-
rator outside of the unit.
NOTE: Applying dish soap on the tubing insulation of
the heat exchanger and around the holes in the lower
compartment floor will assist in working the heat
exchanger through the hole.
NOTE: When installing replacement heat exchanger,
be sure to thoroughly clean the tubing before brazing.
NOTE: Apply a bead of silicone around the heat
exchanger where it passes through the hole in the
lower compartment.
#7015817 - Revision A - January, 2010
INTEGRA TED
INTEGRA TED
(736 T (736 T
(See Figure 7-55)
(See
7-24
SERIES
SERIES
all SWS #2970000) all SWS #2970000)
Heat Exchanger
Figure 7-55. Cut Inlet and Outlet at Evaporator
Figure 7-56. Cut Suction line at compressor
Cut cable tie
Leave capillary tube
attached to drier
Figure 7-57. Cut Inlet at Filter-Drier
Cut here
Hole through floor
Cut here
Cut 1" from drier