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Important: Heat Sensitive Bulb.
The TXV sensing bulb must be removed or a wet rag
must be wrapped around the suction line between
the Bulb and the braze joint to protect the Bulb from
failure due to overheating.
STEP 5 - Braze refrigerant line connections.
Note: The suction line must be insulated prior to
brazing the line set to the air handler stubs.
1. Pull back the insulation before brazing the suc-
tion line.
2. Wrap the TXV sensing bulb and line section
between the bulb and braze with a wet rag.
3. Braze the refrigerant line connections.
Important: Care must be taken during brazing to
avoid damage to unit components and wiring.
STEP 6 - Pressurize the refrigerant lines and evapo-
rator coil to 150 PSIG using dry nitrogen.
STEP 7 - Check for leaks by using a soapy solution
or bubbles at each brazed location.
Wet Rag on
TXV sensor bulb
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