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Wolf Sub-Zero BI Series Service Manual page 17

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Built-In (BI) Series
Built-In (BI) Series
The sealed system components at the top of the appliance sit on a sliding unit tray. There is a slot in the unit tray
running from front to back, with a bolt positioned in the middle of this slot and attached to the top of the appliance.
This allows the tray to be pulled straight forward to aid
in sealed system repairs. (See Figure 6-118) When not
being moved for service, a bolt passing down through a
hole at the front of the unit tray holds it in place.
UNIT COULD TIP FORWARD! MAKE SURE THE
ANTI-TIP BRACKETS ARE IN PLACE AND THE
UNIT
IS
PROPERLY
ATTEMPTING TO SLIDE THE UNIT TRAY OUT.
NOTES:
Removing the condenser fan shroud assembly before
sliding the unit tray out will allow greater access to
sealed system components on the tray. See con-
denser Fan Shroud Assembly removal instructions
earlier in this section.
When tapping into the sealed system, always use
solder-on process valves. Do NOT use bolt-on
process valves as they are prone to leak.
Whenever servicing the sealed system, the high-side
filter-drier MUST be replaced.
High-Side Filter-Drier
NOTE: It is not necessary to slide the unit tray forward
in order to replace a high-side filter-drier.
To remove a high-side filter-drier, first capture the refrig-
erant from sealed system, then (See Figure 6-119):
1. With a file, score a line around capillary tube 1" or
less from drier outlet, then fatigue capillary tube at
this line until it separates.
2. With a tube-cutter, cut inlet tube 1" or less from
drier inlet.
NOTES:
Do not sweat tubing apart. Doing so will induce
moisture into the sealed system.
After capillary tube separates, check tubing for inter-
nal burrs. If burrs exist, repeat step 1 above.
When installing replacement filter-drier, insert capil-
lary tube until it touches screen inside drier, then pull
capillary tube away from screen approximately 3/8"
before brazing. (See Figure 6-120).
Filter-drier outlet must be facing downward in order to
function properly.
(SWS #4380000)
(SWS #4380000)
Model BI-36F Sealed system Components
ANCHORED
BEFORE
Bolt
Figure 6-118. Sliding Out the Unit Tray
Cut Here
Figure 6-119. Filter-Drier Removal
Figure 6-120. Capillary Tube Insertion Note
6-47
Component Removal
3/8" (9.5 mm)
7040317 - Revision A - September, 2015

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