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High altitude orifice sizing – Alliance Laundry Systems T433I User Manual

Page 40

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Gas Requirements

M414038

38

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High Altitude Orifice Sizing

For proper operation at altitudes above 2000 feet
(610 meters), the gas orifice size must be reduced to
ensure complete combustion. For CE Marked models,
consult local gas supplier.

Table 6

Non-CE Marked Models

Model

Gas

Altitude

Orifice

New

Rate

feet

m

No.

inches

mm

Quantity

Part No.

(Btu/hr)*

120FG

Natural

Gas

2001 – 4000

610 – 1220

14

0.1820

4.6

3

M411371

276,000

4001 – 6000

1221 – 1830

16

0.1770

4.5

M411373

252,000

6001 – 8000

1831 – 2440

17

0.1730

4.4

M411374

228,000

8001 – 10,000

2441 – 3050

19

0.1660

4.2

M402995

204,000

L.P.
Gas

2001 – 4000

610 – 1220

35

0.1100

2.8

M402487

276,000

4001 – 6000

1221 – 1830

36

0.1065

2.7

M411375

252,000

6001 – 8000

1831 – 2440

38

0.1015

2.6

M411376

228,000

8001 – 10,000

2441 – 3050

40

0.0980

2.5

M406361

204,000

170FG

Natural

Gas

2001 – 4000

610 – 1220

14

0.1820

4.6

4

M411371

363,400

4001 – 6000

1221 – 1830

16

0.1770

4.5

M411373

331,800

6001 – 8000

1831 – 2440

17

0.1730

4.4

M411374

300,200

8001 – 10,000

2441 – 3050

19

0.1660

4.2

M402995

268,600

L.P.
Gas

2001 – 6000

610 – 1830

30

0.1285

3.3

3

M401021

363,400

6001 – 8000

1831 – 3050

31

0.1200

3.0

M401017

300,200

* Btu/hr derate of 4% per 1000 ft. (305 m) of altitude.