Raypak 1334001 operating instructions

Rev. 15 reflects the following:

Changes to: “Hard” water specification on page 23, Wiring Diagram headers - “W2/WH2” was “WH2” on page 38, “WH1” was “WH2” on pages 39-44

Additions: Adjustment procedure for two-stage Robertshaw gas valve (including Fig. 39) on page 46

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