Raypak 751 Operations Instructions download pdf (Page 33)

This type of installation can cause non warrantable

problems with components and poor operation of the

unit due to the recirculation of flue products. Multiple

direct vent caps, when installed in the same horizontal

plane, should have three (3) foot clearance from the

side of one vent cap to the side of the adjacent vent

cap(s).

Combustion air supplied from outdoors must be free of

particulate and chemical contaminants. To avoid a

blocked flue condition, keep the vent cap clear of

snow, ice, leaves, debris, etc.

The Stainless Steel direct vent cap must be fur-

nished by the boiler manufacturer in accordance

with its listing.

WARNING: For common vent installations call

factory.

WARNING: No substitutions of flue pipe or vent

cap material are allowed. Such substitutions would

jeopardize the safety and health of inhabitants.

Fig. 24: Vertical Direct Venting/Combustion Air

(Category I)

*Vent lengths are based on a lateral length of 2 feet. Refer to the latest edition of National Fuel Gas Code for further details

(ANSI Z223.1) or in Canada, the latest edition of CSA B149 Installation Code.

Table N: Vertical Direct Venting without Add-on Condensing Heat Exchanger

ADB-1501

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 56 57

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Raypak 751 Operations Instructions Page 33