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Bobcat Models B-120A and B-200A
A. NON-DIRECT VENT INSTALLATION
1. Air drawn horizontally from outdoors DIRECTLY
through an outside wall; one louvered opening near the
floor and one louvered opening near the ceiling, each
opening with a minimum FREE air passage area of
550mm 2 /Kw (1 square inch per 4000 Btuh) of total
appliances' input.
2. Air drawn horizontally through HORIZONTAL DUCTS;
one opening near the floor and one opening near the
ceiling, each opening with a minimum FREE air passage
area of 1100mm 2 /Kw (1 square inch per 2000 Btuh) of
total appliances' input.
3. Air drawn VERTICALLY from outdoors; one opening at
the floor and one opening at the ceiling, each opening with
a minimum FREE air passage area of 550mm 2 /Kw (1
square inch per 4000 Btuh) of total appliances' input.
4. Air drawn from inside the building; one opening near the
floor and one opening near the ceiling, each opening with
a minimum FREE air passage area of 2200mm 2 /Kw (1
square inch per 1000 Btuh) of total appliances' input.
IF BOILERS ARE INSTALLED ADJACENT TO OTHER FUEL
BURNING EQUIPMENT, THE AREA OF FREE OPENINGS
MUST BE APPROPRIATELY INCREASED TO
ACCOMMODATE THE ADDITIONAL LOAD.
B. DIRECT VENT INSTALLATION
Adequate air supply should be provided to prevent overheat -
ing of the boiler controls and boiler room. Openings for
passage of air into the boiler room for direct-vent installation
must be at least half of the openings required for the non-
direct vent as mentioned above.
If additional non-direct vent appliances are installed in the
same space and adequate air openings are provided for
them, there are no additional air openings required for the
Bobcat B-120A and B-200A boilers.
For both direct and non-direct installation, the following must
be considered:
- Openings must never be reduced or closed. If doors or
windows are used for air supply, they must be locked open.
- Protect against closure of openings by snow and debris.
Inspect frequently.
- No mechanical draft exhaust or supply fans are to be used
in or near the boiler area.
- Boiler area must never be under negative pressure. The
flow of combustion and ventilating air to the boiler must not
be obstructed.
FLUE GAS VENTING REQUIREMENTS
The Bobcat B-120A and B-200A series boilers are high
efficiency, mechanically forced draft boilers and, therefore,
require different venting arrangements than natural draft,
lower efficiency boilers.
THE FOLLOWING INSTRUCTIONS MUST BE CAREFULLY
READ AND FOLLOWED IN ORDER TO AVOID ANY
HAZARDOUS CONDITIONS DUE TO IMPROPER
INSTALLATION OF THE AIR INTAKE AND FLUE GAS
VENTING SYSTEM.
The vent piping installation MUST be in accordance with these
instructions and with ANSI Z223.1-latest edition and CSA
B149.1-05. Other local codes may also apply and must be
followed. Where there is a conflict between these require -
ments, the more stringent case shall apply.
The use of a vent damper is NOT permitted on this boiler
series.
VENT AND AIR INTAKE MATERIALS
The air intake system for direct vent installations must be 3"
diameter PVC/CPVC schedule 40 pipe, the vent system must
be 3" diameter, certified to ULC 3636 or UL listed single wall
3" diameter AL29-4C* stainless steel material. The following
manufacturers' systems are approved for use within a
specified minimum and maximum equivalent vent length in
this manual.
*AL29-4C is a registered Trademark of Allegheny Ludlum Corp.
Manufacturer
Type/System
Saf-T Standard
Heat-Fab Inc.
elbow
Saf-T, tight radius
Heat-Fab Inc.
elbow
ProTech System
FasNseal
Inc.
Z-Flex Inc.
Z-Vent
Certified PVC or
CPVC Venting
Various
System to ULC
S636
PVC, CPVC
Various
Schedule 40 (air
intake only)
When joining the various components of the Certified PVC or
CPVC Venting or listed stainless steel vent systems, the
manufacturers' instructions should be closely followed to
insure proper sealing. Use sealant specified by vent system
manufacturer for sealing of pipe and fittings, if required. When
joining the ULC S636 Certified PVC or CPVC Venting pipe and
fittings, follow the instructions provided in this manual. All
connections must be liquid and pressure tight. DO NOT use
galvanized flue pipe or any plastic-type materials other than
ULC S636 Certified PVC or CPVC Venting.
The integral adapters on the boiler are designed to
accommodate either ULC S636 Certified PVC or CPVC
Venting or the listed stainless steel vent systems. These
adapters have built-in sealing rings, so no additional sealant
is required. Make sure the pipes are round and burr-free, and
push down into the appropriate step of the adapter, until
snug. (See Figure 5).
Figure 5. Vent and Air Intake Pipe Installation into
Boiler Adapter.
7
Sealant
Not required
Not required
GF, RTV 106
Consult Manufacturers
Instructions
Consult Manufacturers
Instructions
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