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Sealed System
Perimeter Hot Tube Repair Kit
Effective July 1, 1992, Section 608 of the Clean Air Act
prohibits individuals from knowingly venting ozone
depleting compounds used as refrigerants into the
atmosphere while maintaining, servicing, repairing, or
disposing of refrigerant equipment.
A hot tube repair kit is used to bypass a leaking
Perimeter Hot Tube (Yoder-Loop). The Perimeter Hot
Tube must be bypassed in the sealed refrigeration
system and a low wattage heater wire installed inside the
tube. This heater will prevent condensation from forming
on the exterior front edge of the cabinet.
Hot Tube Heater Kit Contains:
1 Copper Bypass Tube
1 Plastic Sleeve
1 Filter-Drier
1 Heater Wire
3 Clamps
1 Harness Adapter
3 Screws
2 Wire Connectors
Step 1 - Bypassing Perimeter Hot Tube
1.
Disconnect service cord from power supply.
2.
Recover refrigerant from system.
3.
Remove filter-drier.
4.
Using a tubing cutter, cut and de-burr tubing from
perimeter hot tube at filter-drier inlet and between
condenser and hot tube.
5.
Install copper bypass tube and replacement filter-
drier. Use 45% silver solder for all connections.
6.
Drill or pierce three holes in cabinet to hold clamps.
Secure by-pass tube just below cabinet edge with
three clamps and screws provided.
When clamped in place the by-pass tube should
NOT touch any plastic lines, such as water lines
for ice makers and/or filters as well as drain lines.
7.
Evacuate and recharge refrigeration system. Refer
to serial plate for correct charge.
Step 2 - Installing the Heater Wire
1.
Attach Vacuum Pump and Gauge Set to one end
of perimeter hot tube with the adapter and plastic
sleeve. (See Figure 7-18)
2.
Cutoff waxed end of fiberglass braid that is extended
past end of heater wire, and make knot in end just a
little smaller than inside diameter of hot tube.
Take the time to remove all the bends from the
heater (caused from being rolled up) by pulling
the heater and braid through a shop rag with a
small amount of silicone on the rag and laying it in
a roll at the open end of the Hot Tube. It will make
heater installation go faster. Using of a good two
stage, 5 CFM Vacuum Pump will also make heater
installation go faster.
3.
Insert knot on end of braid into open end of
perimeter hot tube.
4.
With braid inserted, start vacuum pump and place
your thumb over end of tube. When good vacuum
is obtained, release your thumb and begin to feed
braid into hot tube. Continue this process until
string reaches plastic sleeve.
5.
Disconnect plastic sleeve.
6.
Pull braid out while pushing equal amount of braided
heater wire into tube at other end until heater wire
appears inside braid.
7-20
Figure 7-18.
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