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General Information
Table A: Basic Data
Model
No.
Q
uantity of Burners
Vent Size (in.)
Flue Intake
HD101 2 4
4
HD151 3 4
HD201 4 5
HD251 5 5
HD301 6 5
HD401 8 6
7
Fig. 5: Gas Valves
Fig. 4: Air Shutter Adjustment
Raypak HD401 Water Heater User Manual