Carrier BW9 Series Installation Instructions Manual page 4

UNIT
Top
Left Side
Right Side
Base
Front
Back
Intake/Vent Piping
Near Boiler Hot Water Piping
LOCATING THE BOILER
All distances measured from the cabinet of the boiler. (See Table
2.)
1. Select a location which is level, central to the piping
systems served and as close to the vent and air intake
terminals as possible.
2. Accessibility clearances, if more stringent (i.e. larger
clearances) than required fire protection clearances, must
be used for the boiler installation. Accessibility clearances
may be achieved with the use of removable walls or
partitions.
3. The boiler is approved for installation in closets and on
combustible floors. This boiler shall NOT be installed on
carpeting.
4. The clearances shown in Table 2
clearances per CSA listing. A minimum 1 in. clearance
must be maintained between combustible construction and
each of the right, top and back surfaces of the boiler. A
minimum 8" clearance is required on the left side,
to allow room for the inlet air pipe. An 18" clearance must
be maintained at the front where passage is required for
cleaning or servicing, inspection or replacement of any
parts that normally may require such attention. Allow at
least 24" at the front and left side and 8" at the top for
servicing. No combustible clearances are required to
venting or combustion air intake piping.
5. Equipment shall be installed in a location which facilitates
the operation of venting and combustion air intake piping
systems as described in this manual.
6. Advise owner of boiler to keep venting and combustion
air intake passages free of obstructions. Both the venting
and combustion air intake piping systems connected to the
outdoors must permit flow through the piping systems
without restrictions for the boiler to operate.
7. The boiler shall be installed such that the automatic gas
ignition system components are protected from water
(dripping, spraying, rain, etc.) during operation and
service (circulator replacement, control replacement, etc.).
8. The boiler must be located where ambient temperatures
(minimum possible room air temperatures where boiler is
installed assuming boiler is not in operation and therefore
contributes no heat to the space) are always at or above 32
degrees F to prevent freezing of liquid condensate.
COMBUSTION AND VENT PIPE REQUIREMENTS
This boiler requires a dedicated direct vent system. In a direct
vent system, all air for combustion is taken directly from outside
atmosphere, and all flue products are discharged to outside
atmosphere.
Combustion air and vent pipe connections must terminate
together in the same atmospheric pressure zone, either through
the roof or sidewall (roof termination preferred). See Fig. 8
through 12 for required clearances.
Table 2—Boiler Clearances (In.)
COMBUSTIBLE
CONSTRUCTION
1
8
1
1
0
1
0
1
indicate required
ACCESSIBILITY/
CLEANING
8
24
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24
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WARNING
!
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in fire,
explosion, personal injury or death.
Keep boiler area clear of debris and free of flammable
and combustible materials, vapors, and liquids to
prevent fires.
WARNING
!
CARBON MONOXIDE POISONING AND FIRE
HAZARD
Failure to follow this warning could result in property
damage, personal injury, or death.
When vent pipe is exposed to temperatures below
freezing, such as when it passes through an unheated
space or when a chimney is used as a chaseway, vent
pipe must be insulated with 1/2" Armaflex or
equivalent. In extreme cold climate areas, use
3/4"Armaflex or equivalent. Combustion air must be
clean outdoor air. Combustion air must not be taken
from inside structure because that air frequently is
contaminated by halogens, which include fluorides,
chlorides, phosphates, bromides and iodides. These
elements are found in aerosols, detergents, bleaches,
cleaning solvents, salts, air fresheners, paints, adhesives
and other household products. Locate combustion air
inlet as far away as possible from swimming pool and
swimming pool pump house.
All combustion air and vent pipes must be airtight and
watertight. Combustion air and vent piping must also
terminate exactly as shown in Fig. 8 or 9. If the
concentric vent termination is being used, refer to Fig.
10 through 12 for proper setup.
Vent connections serving appliances vented by natural
draft shall not be connected into any portion of
mechanical draft systems operating under positive
pressure.
Solvent cements are combustible. Keep away from heat,
sparks, open flame. Use only in well ventilated areas.
Avoid breathing in vapor or allowing contact with skin
or eyes.
CONDENSATE DRAIN REQUIREMENTS
Condensate drain line to be pitched down to floor drain at a
minimum of 1/4" per foot. An external condensate pump (not
furnished) may be used if floor drain is not available. The
condensate pump must be designed for flue gas condensate
application.
4
SERVICING
8
24
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24
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