Install Instructions

Installation & Service Manual
16
Masonry Chimney Installation
A masonry chimney must be properly sized for the installation
of a gas fired appliance. Venting of an appliance into a cold
or oversized masonry chimney can result in op er a tion al and
safety problems. Exterior masonry chim neys, with one or
more sides exposed to cold out door tem per a tures, are more
likely to have venting problems. The temperature of the flue
gases from an appliance may not be able to suf fi cient ly heat
the ma son ry structure of the chim ney to generate proper
draft. This will result in condensing of flue gases, damage
the masonry flue/tile, insufficient draft and possible spill age
of flue gases into an occupied living space. Care ful ly in spect
all chimney systems before installation. If there is any doubt
about the sizing or condition of a masonry chimney, it must
be relined with a prop er ly sized and approved chimney liner
system.
Inspection of a Masonry Chimney
A masonry chimney must be carefully inspected to determine
its suitability for the venting of flue gas es. A clay tile lined
chimney must be structurally sound, straight and free of
misaligned tile, gaps between liner sections, missing sections
of liner or any signs of con den sate drainage at the breaching
or clean out. If there is any doubt about the condition of a
masonry chimney, it must be relined. An unlined masonry
chimney must not be used to vent flue gases from this appliance.
An unlined chimney must be relined with an approved
chimney liner system when a new appliance is be ing attached
to it. Metallic liner systems (Type “B” double wall or flexible
or rigid metallic liners) are recommended. Consult with
local code officials to determine code requirements or the
advisability of using or relining a masonry chimney.
Sidewall Venting - Negative Draft
Figure 2-6_Unit with Fan Assisted Venting
If draft exceeds the spec i fied range, the fan must be adjusted
or the installation of a baro met ric damper in the flue may be
required to prop er ly control draft. An induced draft fan MUST
be interlocked into the appliance’s control circuit to start when
the appliance calls for heat. The in duced draft fan MUST also
be equipped with a prov ing switch, properly interlocked into
the ap pli ance’s con trol circuit to prove fan operation before
the main burn ers are allowed to fire. A vertical or sidewall vent
termination for an induced draft fan MUST be in stalled per the
recommendations of the fan manufacturer and provide proper
clearances from any combustion or ventilation openings,
win dows, doors or other open ings into the building. All
induced draft fan in stal la tions must comply with local code
requirements.
Fan Assisted Venting
A Power Venter Kit is available on Models 45,000 - 135,000 Btu/hr only
(see Table 2B).
TABLE 2B - VENT MATERIALS
Kit
Number
Input
Btu/hr
Material
KIT3103
45,000 PVC Rated (CPVC Optional)
75,000 PVC Rated (CPVC Optional)
KIT3104
90,000 CPVC Rated
135,000 CPVC Rated
Minimum Vent Length = 12 Equivalent Feet*
(ALL UNITS)
Maximum Vent Length = 25 Equivalent Feet*
(ALL UNITS)
* Equivalent Feet: 90° Elbow = 5 Feet
45° Elbow = 3 Feet
2 Venting
This appliance is NOT approved for sidewall venting as
shipped from the factory. If installation requires that the
flue gases be vented out a sidewall, either an induced draft
fan or a power venter MUST be used. A power venter
that plugs directly into the vent damper plug is available
for models up to 135,000 Btu/hr and may be used for
both sidewall and vertical venting configurations, see Fan
Assisted Venting. Larger models may use an induced draft
fan, which will connect to the terminal strip on the side
of the boiler, see Auxiliary Power Venting Connection to
Terminal Strip, page 33 for more information. A properly
sized and in stalled induced draft fan may also be used
to vent the flue gases ver ti cal ly if required by jobsite
re stric tions. The induced draft fan must be listed by a
nationally recognized test agency, be properly sized and
installed per the rec om men da tions of the in duced draft fan
manufacturer and meet local code requirements. Use care to
ensure that the me chan i cal ly supplied draft operates within
the range of a negative 0.02 to 0.05 inches water column to
ensure proper operation.
DO NOT use Radel or cellular (foam) core
PVC or CPVC pipe.
CAUTION
NOTE: In Canada, CPVC and PVC vent pipe, fi ttings and
cement/primer must be ULC-S636 certifi ed.
 WARNING
DO NOT insulate PVC or CPVC venting
materials. Use of insulation will cuase
increased vent wall temperatures, which
could result in vent pipe failure.