Whirlpool 89263 User Manual

7

1/2
3/4

1

1-1/4
1-1/2

132
278
520

1050
1600

92

190
350
730

1100

73

152
285
590
890

63

130
245
500
760

56

115

215
440
670

50

105
195
400
610

46
96

180
370
560

43
90

170
350
530

40
84

160
320
490

38
79

150
305
460

34
72

130
275
410

31
64

120
250
380

28
59

110

225
350

26
55

100
210
320

Table 1

Natural Gas Pipe Capacity Table (Cu. Ft./Hr.)

Capacity of gas pipe of different diameters and lengths in cu. ft. per hr. with pressure drop of 0.3 in. and specific gravity
of 0.60 (natural gas).

After the length of pipe has been determined, select the pipe size which will provide the minimum cubic feet per hour
required for the gas input rating of the water heater. By formula:

Gas Input of Water Heater (BTU/HR) 

Heating Value of Gas (BTU/FT³) 

3

The gas input of the water heater is marked on the water heater data plate. The heating value of the gas (BTU/FT )
may be determined by consulting the local natural gas utility.

 Cu. Ft. Per Hr. Required=

Additional tables are available in the latest edition of the "National Fuel Gas Code", ANSI Z223.1.

IMPORTANT:  Air for combustion and ventilation must not 
come from a corrosive atmosphere. Any failure due to 
corrosive elements in the atmosphere is excluded from 
warranty coverage.

The following types of installation (not limited to the 
following) will require outdoor air for combustion due to 
chemical exposure and may reduce but not eliminate the 
presence of corrosive chemicals in the air:

• beauty 

shops

• photo 

processing 

labs

• 

buildings with indoor pools 

• 

water heaters installed in laundry, hobby, or craft rooms

• 

water heaters installed near chemical storage areas

Combustion air must be free of acid-forming chemicals 
such as sulfur, fluorine, and chlorine. These elements are 
found in aerosol sprays, detergents, bleaches, cleaning 
solvents, air fresheners, paint, and varnish removers, 
refrigerants, and many other commercial and household 
products. When burned, vapors from these products form 
highly corrosive acid compounds. These products should 
not be stored or used near the water heater or air inlet.

Combustion and ventilation air requirements are 
determined by the location of the water heater. The water 
heater may be located in either an open (unconfined) area 
or in a confined area or small enclosure such as a closet or 
small room. Confined spaces are areas with less than 50 
cubic feet for each 1,000 BTUH of the total input for all gas-
using appliances.