Lochinvar 80 - 285 User Manual download pdf (Page 21)

Installation & Operation Manual

4 Sidewall direct venting

Vent/air termination – sidewall

Follow instructions below when

determining vent location to avoid

possibility of severe personal injury, death,

or substantial property damage.

A gas vent extending through an exterior

wall shall not terminate adjacent to a wall or

below building extensions such as eaves,

parapets, balconies, or decks. Failure to

comply could result in severe personal

injury, death, or substantial property

damage.

Installation must comply with local

requirements and with the National Fuel

Gas Code, ANSI Z223.1 for U.S.

installations or CSA B149.1 for Canadian

installations.

Determine location

Locate the vent/air terminations using the following

guidelines:

1. The total length of piping for vent or air must not exceed

the limits given in the General Venting Section on page 19

of this manual.

2. You must consider the surroundings when terminating the

vent and air:

a. Position the vent termination where vapors will

not damage nearby shrubs, plants or air

conditioning equipment or be objectionable.

b. The flue products will form a noticeable plume as

they condense in cold air. Avoid areas where the

plume could obstruct window views.

c. Prevailing winds could cause freezing of

condensate and water/ice buildup where flue

products impinge on building surfaces or plants.

d. Avoid possibility of accidental contact of flue

products with people or pets.

e. Do not locate the terminations where wind eddies

could affect performance or cause recirculation,

such as inside building corners, near adjacent

buildings or surfaces, window wells, stairwells,

alcoves, courtyards, or other recessed areas.

Do not exceed the maximum lengths of the

outside vent piping shown in FIG. 4-1B.

Excessive length exposed to the outside

could cause freezing of condensate in the

vent pipe, resulting in potential boiler

shutdown.

Figure 4-1B Alternate PVC/CPVC Sidewall Termination

of Air and Vent w/Field Supplied Fittings

 WARNING

NOTICE

 WARNING

Do not connect any other appliance to the

vent pipe or multiple boilers to a common

vent pipe. Failure to comply could result in

severe personal injury, death, or substantial

property damage.

 WARNING

Sidewall vent and air inlet terminations

must terminate in the same pressure zone.

If using the alternate sidewall termination:

3. The air piping must terminate in a down-turned elbow as

shown in FIG. 4-1B. This arrangement avoids recirculation

of flue products into the combustion air stream.

4. The vent piping must terminate in an elbow pointed

outward or away from the air inlet, as shown in FIG. 4-1B.

f. Do not terminate above any door or window.

Condensate can freeze, causing ice formations.

g. Locate or guard vent to prevent condensate damage

to exterior finishes.

TO BOILER

INTAKE AIR

CONNECTION

FROM BOILER

VENT PIPE

CONNECTION

VENT / AIR

TERMINATION

GRADE OR

SNOW LINE

12"

MIN

12"

MIN

OVER-

HANG

POSSIBLE ORIENTATIONS

Figure 4-1A PVC/CPVC Sidewall Termination of Air

and Vent

Model Kit Number Vent Size

80 - 210 KIT30045 3 inch vent

285 KIT30046 4 inch vent

Table 4A Sidewall Vent Kits

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 75 76

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