Raypak HI DALTA HD101 User Manual download pdf (Page 24)

ances shall not terminate over public walkways or

over an area where condensate or vapor could

create a nuisance or hazard or could be detrimen-

tal to the operation of regulators, relief valves, or

other equipment. Where local experience indi-

cates that condensate is a problem with Category

I and III appliances, this provision shall also apply.

8. Locate and guard vent termination to prevent acci-

dental contact by people or pets.

9. DO NOT terminate vent in window well, stairwell,

alcove, courtyard or other recessed area.

10. DO NOT terminate above any door, window, or

gravity air intake. Condensate can freeze, causing

ice formations.

11. Locate or guard vent to prevent condensate from

damaging exterior finishes. Use a rust resistant

sheet metal backing plate against brick or mason-

ry surfaces.

12. DO NOT extend exposed vent pipe outside of

building. Condensate could freeze and block vent

pipe.

US Installations

Refer to latest edition of the National Fuel Gas Code.

Vent termination requirements are as follows:

a) Vent must terminate at least four (4) feet below,

four (4) feet horizontally, or one (1) foot above any

door, window or gravity air inlet to the building.

b) The vent must not be less than seven (7) feet

above grade when located adjacent to public walk-

ways.

c) Terminate vent at least three (3) feet above any

forced air inlet located within ten (10) feet.

d) Vent must terminate at least four (4) feet horizon-

tally, and in no case above or below unless four (4)

feet horizontal distance is maintained, from elec-

tric meters, gas meters, regulators, and relief

equipment.

e) Terminate vent at least six (6) feet away from adja-

cent walls.

f) DO NOT terminate vent closer than five (5) feet

below roof overhang.

g) The vent terminal of a direct vent appliance with

an input over 50,000 BTUH per hour shall require

a 12-inch vent terminal clearance.

h) Terminate vent at least one (1) foot above grade,

including normal snow line.

) Multiple direct vent installations require a four (4)

foot clearance between vent caps.

Installations in Canada

Refer to latest edition of CAN/CGA-B149.

A vent shall not terminate:

a) Directly above a paved sidewalk or driveway

which is located between two single family

dwellings and serves both dwellings.

b) Less than 7 ft. (2.1m) above a paved sidewalk or

paved driveway located on public property.

c) Within 6 ft. (1.8m) of a mechanical air supply inlet

to any building.

d) Above a meter/regulator assembly within 3 ft.

(914mm) horizontally of the vertical center-line of

the regulator.

e) Within 6 ft. (1.8m) of any gas service regulator

vent outlet.

f) Less than 1 ft. (305mm) above grade level.

g) Within the 3 ft. (914mm) of a window or door which

can be opened in any building, any non-mechani-

cal air supply inlet to any building or the

combustion air inlet of any other appliance.

h) Underneath a verandah, porch or deck, unless

(i) the verandah, porch or deck is fully open on a

minimum of two sides beneath the floor, and

(ii) the distance between the top of the vent termi-

nation and the underside of the verandah,

porch or deck is greater than 1 ft. (30 cm).

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Raypak HI DALTA HD101 User Manual Page 24

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