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Installation, Operation, Maintenance
Mar 03, 2017 · weld directly on the heat exchanger shells. Only an authorized ASME-certified repair agency may weld directly on ASME-certified shells. After weld-ing, an “R” stamp is required. CAUTION: Working with HVAC equipment can be hazardous due to electricity, moving parts, chemicals, combustion and other hazards. Use safe work
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