Weil-McLain SlimFit 2 Series Manual page 24

SlimFit Series 2
®
Venting/combustion air — general
Combustion air contamination
Direct exhaust
1. (combustion air from boiler room):
a. Provide combustion air openings to boiler room as
described in this manual.
b. Ensure the boiler room and combustion air source
areas are free of contaminants.
Figure 21
Corrosive contaminants and sources
Products to avoid
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
Venting/combustion air — options
Boiler vent and air connections:
Provide a vent pipe mfr's Slim-Fit VENT/AIR ADAPTER at boiler vent connection and air connection (if used).
See Figure 96, page 105 for part/kit numbers.
Provide pipe manufacturer's reducer(s) as needed to meet vent/air pipe size used.
BIRD SCREENS —
Provide a vent manufacturer's BIRD
SCREEN at each termination. Bird
screens must be purchased from the vent/
air piping supplier.
BOILER VENT/AIR CONNECTION GASKETS
Verify that the gasket is installed correctly, as shown
in the images at right. The barbed band of the gas-
ket must point DOWN.
BOILER VENT CONNECTION CLAMP
DO NOT over-tighten the vent connection-to-vent
adapter clamp. Tighten securely while checking to
make sure that the clamping band does not deform
or dig into the plastic vent connector.
24
commercial condensing gas
— Boiler Manual
-
fired water boiler
(continued)
Direct vent
2. (combustion air piped from outside):
a. Install air inlet piping for the SlimFit boiler as de-
scribed in this manual.
b. Do not terminate air piping in locations that can allow
contamination of combustion air.
3. See Figure 21 for products and areas which may cause
contaminated combustion air.
Areas likely to have contaminants
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
New building construction
Remodeling areas
Garages with workshops
USE SWEEP ELBOWS FOR ALL VENT AND AIR
PIPING WHEN POSSIBLE
cause higher pressure loss, resulting in less allowable
vent/air piping length. See Figure 24, page 29 for maximum
lengths and reductions required for fittings.
— Short-radius elbows
Outlet
Gasket
Vent or air
connection
Part number 550-100-561/0224