h 82,040 Watts W and storage capacities up to 100 gallons gal 379 liters L and constructed to Underwriters Laboratories, Inc UL or American Society of Mechanical Engineers ASME requirements.

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A-A-50549

a. For heaters 105,000 Btu/h (30,765 W) or less firing 138,500 Btu/gal (496,924 kJ/L) oil (No. 1 oil) recovery capacity shall be based on DoE regulations, CFR Title 10, Chapter II, Part 430 - Energy Conservation Program for Appliances, as sole determination.

b. For heaters firing 140,000 Btu/gal oil (No. 2 oil), see table I.

TABLE I. Capacity and performance based on 140,000 Btu/gal (502,306 kJ/L) of oil.

Efficiency

Percent

Nominal Storage Capacity in US gallons (liters)

Permissible Deviation from Nominal Capacity (%)

Firing Rate Min

gph (L/h)

Recovery Capacity, Minimum gph (L/h)

60 F (16 C)

rise

80 F (27 C)

rise

100 F (38 C)

rise

30 (114)

40 (151)

50 (189)

70 (265)

85 (322)

100 (379)

0.50 (1.89)

0.75 (2.84)

0.85 (3.22)

1.20 (4.54)

1.35 (5.11)

1.45 (5.49)

106 (401)

159 (602)

168 (636)

237 (897)

267 (1011)

287 (1086)

79 (299)

119 (450)

126 (477)

178 (674)

200 (757)

215 (814)

63 (238)

95 (360)

101 (382)

142 (537)

160 (606)

172 (651)

3.5 Performance. Performance and capacity requirements specified herein shall be based on firing light fuel oil having a heat content of 138,500 Btu/gal (496,924 kJ/L) for input 105,000 Btu/h (30,765 W) (No. 1 oil) or less water heaters, or 140,000 Btu/gal (502,306 kJ/L) (No. 2 oil) for all water heaters as specified (see 7.2). Operation of the heaters shall be under standard atmospheric conditions (60 degrees Fahrenheit ( F)) (16 degrees Celsius ( C)) and 14.7 pounds per square

inch (psi) atmosphere with an inlet water supply temperature of 65-75 F (18-24 C) and nominal specific heat of water of 8.25 Btu/gal (29.6 kJ/L) at 120 F (49 C). The temperature rise at specific points on and adjacent to the heater shall not exceed the maximum allowable temperature rises specified in UL732.

3.5.1 Combustion. Observed smoke at all firing rates under steady-state-test conditions shall not exceed the limits indicated by No. 1 on the Shell-Bacharach Scale with the Model RDC Smokemeter.

3.5.2 Recovery efficiency.

3.5.2.1 For heaters with oil having heat content of 138,500 Btu/gal (496,924 kJ/L). The recovery efficiency for heaters of 105,000 Btu/h (30,765 W) or less shall be in accordance with DoE regulations, CFR Title 10, Chapter II, Part 430 - Energy Conservation for Appliances, and shall be the sole determination.