Resizethecommonventingsystemto theminimum ventpipesizedeterminedbyusingtheappropriate tablesin appendixG. (Thesearein thecurrentstan- dardsoftheNationalFuelGasCodeANSIZ223.1in theUSA,andtheappropriateCategory1NaturalGas

andPropaneappliancesventingsizingtablesin the currentstandardsof theCSAB149NaturalGasand

PropaneInstallationCodesinCanada.)

A,CAUTION

3 - The gas piping must not run in or through air ducts, clothes chutes, gas vents or chimneys, dumb waiters, or elevator shafts.

4 - The piping should be sloped 1/4 inch (6.4 mm) per 15 feet (4,57 m) upward toward the meter from the fur- nace. The piping must be supported at proper intervals [every 8 to 10 feet (2.44 to 3.01 m)] with suitable hang- ers or straps, Install a drip leg inside vertical pipe runs to the unit,

5 - In some localities, codes may require the installation of a manual main shut-off valve and union (furnished by the installer) external to the unit, The union must be of the ground joint type,

A, IMPORTANT

Gas Supply

1 - This unit is shipped standard for left or right side instal- lation of gas piping (or top entry in horizontal applica- tions). Connect the gas supply to the piping assembly.

2 - When connecting the gas supply piping, consider fac- tors such as length of run, number of fittings, and fur- nace rating to avoid excessive pressure drop. Table 9 lists recommended pipe sizes for typical applications.

NOTE - Install a 1/8 inch NPT plugged tap in the field piping upstream of the gas supply connection to the unit. The tap must be accessible for test gauge connection. See figure 19. NQ TE - If emergency shutoff is necessarj4 shut off the main manual gas valve and disconnect main power to the fur- nace. The installer should properly label these devices.

TABLE 9

Gas Pipe Capacity - ft3/hr (m3/hr)

Nominal

Internal

 

 

 

 

Length of Pipe -feet(m)

 

 

 

 

Iron Pipe

 

 

 

 

 

 

 

 

Diameter

 

 

 

 

 

 

 

 

 

 

Size

inches

10

20

30

40

50

60

70

80

90

100

inches

(mm)

(3.048)

(6.096)

(9.144)

(12.192)

(15.240)

(18.288)

(21.336)

(24.384)

(27.432)

(30.480)

(ram)

 

 

 

 

 

 

 

 

 

 

 

3/8

.493

95

65

52

45

40

36

33

31

29

27

(9.53)

(12.522)

(2.69)

(1.84)

(1.47)

(1.27)

(1.13)

(1.02)

(.73)

(.88)

(.82)

(.76)

1/2

.622

175

120

97

82

73

66

61

57

53

5O

(12.7)

(17.799)

(4.96)

(3.40)

(2.75)

(2.32)

(2.07)

(1.87)

(1.73)

(1.61)

(1.50)

(1.42)

3/4

.824

360

250

2OO

170

151

138

125

118

11o

103

(19.05)

(20.930)

(10.19)

(7.08)

(5.66)

(4.81)

(4.28)

(3.91)

(3.54)

(3.34)

(3.11)

(2.92)

1

1.049

680

465

375

32O

285

26O

24O

22O

2O5

195

(25.4)

(26.645)

(919.25)

(13.17)

(10.62)

(9.06)

(8.07)

(7.36)

(6.80)

(6.23)

(5.80)

(5.52)

1-1/4

1.380

1400

950

77O

66O

580

53O

490

46O

430

400

(31.75)

(35.052)

(39.64)

(26.90)

(21.80)

(18.69)

(16.42)

(15.Ol)

(13.87)

(13.03)

(12.18)

(11.33)

1-1/2

1.610

2100

460

1180

990

9OO

81o

75O

690

65O

62O

(38.1)

(40.894)

(59.46)

(41.34)

(33.41)

(28.03)

(25.48)

(22.94)

(21.24)

(19.54)

(18.41)

(17.56)

2

2.067

3950

2750

2200

1900

1680

1520

1400

1300

1220

1150

(50.8)

(52.502)

(111.85)

(77.87)

(62.30)

(53.80)

(47.57)

(43.04)

(39.64)

(36.81)

(34.55)

(32.56)

2 -1/2

2.469

6300

4350

3520

3000

2650

2400

2250

2050

1950

1850

(63.5)

(67.713)

(178.39)

(123.17)

(99.67)

(84.95

(75.04)

(67.96)

(63.71)

(58.05)

(55.22)

(52.38)

3

3.068

11000

7700

6250

5300

4750

4300

3900

3700

3450

3250

(76.2)

(77.927)

(311.48)

(218.03)

(176.98)

(150.07)

(134.50)

(121.76)

(110.43)

(104.77)

(97.69)

(92.03)

NOTE - Capacity given in cubic feet (In 3) of gas per hour and based on O.60 specific gravity gas.

Page 20

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Lennox International Inc G50UH-36A-070, G50UH-48C-110 PropaneInstallationCodesinCanada, Gas Pipe Capacity ft3/hr m3/hr
Page 19 Page 21

G50UH-60D-155, G50UH-36B-090, G50UH-36A-070, G50UH-24A-045, G50UH-60D-135 specifications

Lennox International Inc is renowned for its high-quality heating, ventilation, and air conditioning (HVAC) solutions. Among its versatile product lineup are the G50UH series of gas furnaces, which exemplify efficiency and performance. These models, specifically the G50UH-24A-070, G50UH-24A-045, G50UH-36B-090, G50UH-36A-070, and G50UH-48C-135, offer a range of features tailored to meet varying residential heating demands.

One of the key features of the G50UH series is its energy efficiency. Many models in this lineup boast an impressive Annual Fuel Utilization Efficiency (AFUE) rating, which indicates their ability to convert fuel into usable heat efficiently. These high AFUE ratings can lead to significant savings on energy bills, making these furnaces a cost-effective choice for homeowners.

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Safety is paramount in Lennox designs, and the G50UH series is no exception. Each unit is equipped with safety features designed to protect both the furnace and the home. Dual certification ensures that the products meet stringent safety standards. Moreover, features like a self-diagnostic control board streamline maintenance, allowing homeowners to easily identify potential issues.

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