Issue:
Are there schrader valves under the differential pressure switch?
Resolution:
On the first built RTAA 130-400 ton RTAA Chillers, the capillary tube on the high pressure side of the switch was connected to a port on the oil line shutoff valve. The capillary tube on the low pressure side of the switch was brazed into the copper line that feeds oil to the rotors.
On later chillers, a schrader valve was added upstream of the oil line shutoff valve. The switch's high side capillary tube was modified to include a stem depressor and flare fitting. The switch flare fitting connects to this schrader valve. Later, a schrader valve and stem depressor was also added to the low side capillary tube of the DP switch.
Notes:
Refer to RTAA-SB-10 (Figure 6, page 7) to determine if the vintage of chiller
Changes:
Other Question/Problem/Cause Statements:
Facts:
- Air-Cooled Chiller (Pueblo) (RTAA 130-400 Ton)
Document Identifier: DOC-83378
WARNING:
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