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16 important installation warnings, 1 oxygen levels in the system water warning, 2 antifreeze compatibility warning – AERCO Modulex EXT 321 - 1123 User Manual

Page 44: 3 lime scale and corrosive water damage warning, 4 connection to refrigeration system warning, 17 air intake connection, 18 flue manifold connection

16 important installation warnings, 1 oxygen levels in the system water warning, 2 antifreeze compatibility warning | 3 lime scale and corrosive water damage warning, 4 connection to refrigeration system warning, 17 air intake connection, 18 flue manifold connection | AERCO Modulex EXT 321 - 1123 User Manual | Page 44 / 148 16 important installation warnings, 1 oxygen levels in the system water warning, 2 antifreeze compatibility warning | 3 lime scale and corrosive water damage warning, 4 connection to refrigeration system warning, 17 air intake connection, 18 flue manifold connection | AERCO Modulex EXT 321 - 1123 User Manual | Page 44 / 148