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9:CH>C<>CBDHI>CHI6AA6I>DCHWarranty claims will be
denied when condensation occurs.
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Cold Water Starts
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Cold Water Run
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HNHI:BL6I:G8DB>C<768@IDI=:=:6I:GI6@:D;;
Temperature & Pressure Gauge
/=: I:BE:G6IJG: 6C9 EG:HHJG: <6J<: >H ;68IDGN
BDJCI:9>CI=:>CDJI=:69:G
Hydronic Heating
Pump Selection
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Table H: Heater Rates of Flow and Pressure Drops
10°F T 20°F T 30°F T 40°F T
Min. Flow Max Flow
Model
No.
gpm
P (ft)
gpm
P (ft)
gpm
P (ft)
gpm
P (ft)
gpm
P (ft) T
gpm
P (ft) T
302B 50 3.3 25 0.8 N/A N/A N/A N/A 20 0.5 25 90 9.8 6
402B 67 5.8 34 1.4 22 0.6 N/A N/A 20 0.5 34 90 10.0 7
502B 84 9.1 42 2.3 28 1.1 21 0.6 21 0.6 40 90 10.4 9
652B N/A N/A 55 4.1 36 1.8 27 1.1 27 1.1 40 90 10.8 12
752B N/A N/A 63 5.7 42 2.6 32 1.5 32 1.5 40 90 11.3 14
902B N/A N/A 76 8.3 50 3.8 38 2.2 38 2.2 40 90 11.7 17
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NOTE: $C9>K>9J6A 6C9BJAI>7D>A:G DA9 26I:G.I6GI
HNHI:BHG:FJ>G:I=:JH:D;6°![/7D>A:GEJBE
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ADDEEJBE