Raypak MVB TYPE B 504-2004 Instrucciones de operaciones descargar pdf (Pagina 25)

Table L: Category I Vertical Venting

Vent lengths are based on a lateral length of 2 ft. Refer to the latest edition of the NFGC for further

details. When vertical height exceeds 25 ft, consult factory prior to installation.

* Subtract 10 ft per elbow. Max. 4 elbows.

** Adapters supplied by others.

Termination

The vent terminal should be vertical and should termi-

nate outside the building at least 2 ft above the highest

point of the roof that is within 10 ft. The vent cap

should have a minimum clearance of 4 ft horizontally

from and in no case above or below (unless a 4 ft hori-

zontal distance is maintained) electric meters, gas

meters, regulators and relief equipment. The distance

of the vent terminal from adjacent public walkways,

adjacent buildings, open windows and building open-

ings must be consistent with the NFGC (U.S.) or B149

(Canada). Gas vents supported only by flashing and

extended above the roof more than 5 ft should be se-

curely guyed or braced to withstand snow and wind

loads.

Fig. 20: Vertical Venting

Model

No.

Certified

Vent

Material

Vent Size

(in.)

Vertical Vent

Height

(ft)

Combustion Air

Intake Pipe

Material

Air Inlet

Max. Length* (ft)

Min. Max. 6” Ø 8” Ø 10” Ø

504

Category I

(Type B

Equivalent)

5 25

Galvanized

Steel,

PVC,

ABS,

CPVC

45 100**754 10

1104 10

1504 12

45 85**

2004 14

California Hot Water Supply, Inc.

(800) 249-7244

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Raypak MVB TYPE B 504-2004 Instrucciones de operaciones Pagina 25

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