Raypak 503A Installation & Operating Instructions Manual page 2

Rev. 2 reflects the following:
Changes to: Table A on page 8, Table I on page 20, "Electrical Power Connections" on page 20, Table J on page 27,
Table K on page 29, Table M on page 32, Wiring Diagram on page 43, "Blower Check" on page 46, Table T on page 46,
"Manifold Check" on page 46, "Filter Maintenance" on page 54
Additions: "Motorized Combustion Air Dampers or Louvers" on page 11, "Extractors, draft inducers, and motorized flue
dampers" on page 27, Fig. 28 on page 29, Fig. 45 on page 45
Deletions: None
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