6-27
T-294-01
c. Installing the Expansion Valve
1. Clean the suction line with sandpaper before
installing bulb to ensure proper heat transfer. Apply
thermal grease to the indentation in the suction line.
2. Strap the thermal bulb to the suction line, making
sure bulb is placed firmly into the suction line. See
Figure 6-29 for bulb placement.
3. Insulate the thermal bulb.
4. Braze inlet connection to inlet line, see Figure 6-31.
5. Braze outlet connection to outlet line.
6. Reinstall the cushion clamps on inlet and outlet
lines.
7. Braze the equalizer connection to the equalizer line.
8. Check superheat (refer to section 2.2 and
Table 6-9). Container box temperature should be at
--18
_
C (0
_
).
Copper Tube
(Apply heat for
10-15 seconds)
Bi-metallic Tube Connection
(Apply heat for 2-5 seconds)
Do not use a wet cloth!
Braze Rod
(’Sil-Phos” = 5.5% Silver, 6% Phosphorus)
Figure 6-31. Hermetic Thermostatic Expansion Valve Brazing Procedure
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