American Water Heater 300 Series Instruction Manual page 9

* The manifold pressure is the factory setting and is not adjustable. A negative pressure will be seen with just the blower running without
the Gas Control Valve open.
All models - Maximum Supply Pressure: 14 inches W.C. (3.48kPa)
Minimum Supply Pressure for Natural Gas: 3.50" (.87kPa)
Minimum Supply Pressure for Propane Gas: 8.00" (1.99kPa)
Minimum pressure must be maintained under both load and no load (dynamic and static) conditions.
Input
Rating Rating
(Btu/hr) (kW)
100,000 29.3
Recovery capacity based on 96% thermal efficiency.
DIMENSIONS AND CAPACITY DATA
Table 2 – CAPACITY, GAS AND ELECTRICAL CHARACTERISTICS
Approximate Capacity
U.S. Gals. Liters Gas Type
50 189
75 284
Table 3 – RECOVERY CAPACITIES
F 30 40
Temp.
Rise
C 17 22
GPH 387 291
LPH 1465 1102
*Manifold Pressure Electrical Characteristics
"WC kPA Volts/Hz
Nat./LP 0 0 120/60
Nat/LP 0 0 120/60
Recovery Capacities
50 60 70 80
28 33 39 44
233 194 166 145
882 734 628 549
9
Amperes
<5
<5
90 100 110 120
50 56 61 67
129 116 106 97
488 439 401 367
130 140
72 78
90 83
341 314