Vent And Air Termination Options; Direct Vent Installations; Direct Exhaust Installations; Provide Combustion Air - Weil-McLain GV90+ Manual

GV90+ Series 2
Venting & air — general

Provide combustion air:

DIRECT VENT
DIRECT EXHAUST
ALL APPLICATIONS

Vent and air termination options

1. Vent and air piping must terminate out the sidewall or through the
roof of the building, using only one of the methods described in this
manual. See Figure 39, page 32 and Figure 40, page 33 for allowable
configurations and piping materials.

DIRECT VENT installations

1. For direct venting, combustion air must be piped from outside to the
boiler, following the instructions in this manual, and compliant with
all applicable codes.
2. Ventilation openings are required for some spaces. See Fig-
ure 42, page 36.
3. If other appliances are located in the same space with the GV90+ boiler,
provide openings shown in Figure 42, page 36.
If combustion and ventilation air openings are not provided
as directed above and the room does not have adequate
ventilation, the higher temperature in the space may result
in reduced component life.

DIRECT EXHAUST installations

1. Combustion and ventilation air must be provided in the boiler room
on direct exhaust installations. Follow all instructions in this manual
(see page 49 for air opening instructions) and all applicable codes to
provide required air openings.
at altitudes above 5,500 feet. Sidewall venting is only allowed
for
altitudes above 5,500 feet.
30
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GAS FIRED WATER BOILER
applications (ducted combustion air) at
— Boiler Manual
(continued)
Combustion air contamination:
openings or intake terminations near
a swimming pool, for example.
Avoid areas subject to exhaust fumes
from laundry facilities. These areas will
always contain contaminants.
Corrosive contaminants and sources
Spray cans containing chloro/fluorocarbons
Permanent wave solutions
Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning
solvents found in household laundry rooms
Adhesives used to fasten building products and
other similar products
Excessive dust and dirt
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture refinishing areas and establishments
Buildings under construction (where air is
contaminated with particulates)
.
place combustion air supply
Part number 550-142-903/1016