12
110332-04 - 2/23
PHTM II
Installation, Operating & Service Instructions
4. If boiler is installed in room with other
appliances, provide adequate air for combustion
and/or ventilation in accordance with other
appliance manufacturer's instructions and
applicable code. If other appliance(s) require two
openings at least 100 in.
2
(650 cm
2
) each, no
additional openings are required for this
boiler.
Combustion Air and Venting
WARNING
Asphyxiation Hazard.
Boiler requires a special venting system
designed for positive pressure. Supplied vent
connector connects to CPVC, polypropylene,
and stainless steel venting listed in Section
7, General Venting. Failure to vent boiler in
accordance with these instructions could cause
products of combustion to enter the building
resulting in severe personal injury, death or
substantial property damage.
!
DANGER
Component Malfunction.
Outdoor combustion air must be piped directly
to boiler air connection. Ensure combustion air
does not contain contaminants and is not drawn
from an area likely to have contaminants per
Table 5-2. For example, never pipe combustion
air from areas near swimming pools or laundry
room exhaust vents. Contaminated combustion
air will damage boiler resulting in severe
personal injury, death or substantial property
damage.
!
Contaminants to avoid:
Spray cans containing chloro/fluorocarbons (CFC’s)
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
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
Table 5-2: Corrosive Combustion Air
Contaminants and Sources
1. Use only vent and air piping and termination
methods listed in Section 7, General Venting. Vent
and air piping must terminate either horizontally
through a sidewall or vertically through a roof or
chase. Locate boiler so vent and air intake piping
can be routed through building and properly
terminated.
2. Ensure installation does not exceed maximum
air and vent pipe lengths and terminations
are located in acceptable location per these
instructions and all applicable local codes.
5
Locating Boiler
(continued)
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