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Triton
Installation and Operation Instructions - Natural Draft
5.0 GENERAL VENTING
Triton boilers are certified as Natural Draft appliances. ANatural Draft installation draws combustion air from the
room and uses the stack effect and draft system to exhaust flue gases using a chimney.
Air Supply - Allowances for combustion air must be supplied to the appliance space, due to the fact that the
heating appliance consumes large volumes of combustion air. In most instances, a permanent opening with an
unobstructed or "free area" of 1 square inch for every 1000 BTU's of input will provide a sufficient amount of
combustion air for the boiler to operate properly. If the building is fairly new and relatively air tight,
compensate for the air tightness by using a "free area" that is 15% larger that what was calculated above. Do
not place the boiler in, or adjacent to, a room where an exhaust fan is operating. Refer to "Combustion Air"
section for more details. Installation must comply with Standard CSA B139 (Canada) and NFPA 31 (USA).
Stack Draft - Sufficient draft by natural or mechanical means is necessary for ensuring optimal and consistent
operation. The appliance should have a stack draft sufficient to support stable operation. See Draft Settings.
Avoiding Condensation - Due to the high combustion efficiencies and low stack gas
temperatures, great care must be taken to ensure that the chimney isn't subjected to gas
condensation. The exhaust gas temperature where the flue pipe enters the chimney must
be a minimum of 240
Draft Regulator - A draft regulator must be used and set to regulate the draft of the boiler. Make sure that the
damper is free to operate without sticking, for this will affect the boiler's combustion system. It is important
that the draft be adequate because poor draft conditions will cause poor operation and a possible hazardous
condition.
Draft Settings – The Triton is designed to operate with a -0.04" w.c. draft in the flue
breaching; therefore, ensure there is enough natural or mechanical draft for proper
operation. Due to the design of the Triton it may operate at a positive over fire pressure
up to +0.03 at a -0.02 draft.
Natural Draft Rules and Guidelines
1. Acceptable Venting Material - Use vent material approved by National Standards NFPA 31 (USA) or CSA
B139 (Canada) and local codes.
2. Venting Application - Venting must be connected to a chimney for models operating with Natural Draft.
3. Chimney Condition - Inspect existing chimney before installing new boiler. Deterioration of mortar joints
should be repaired prior to using.
4. Chimney Height - Chimney must extend 3' above the highest point where it exits the roof and 2' higher than
any part of the structure within 10'.
5. Cleaning - Clean chimney, if required; ensure it is clear of any blockages before connecting breeching.
6. Liner Condition - Damaged liner or pipe should be repaired before commencing installation.
7. Minimum Clearances - Observe clearances to combustibles illustrated in Figure 3-1 and Table 3-1:
8. a) Double-wall vent (Type-L) 6 "
9. b) Single-wall vent
10. Chimney Sizes - Minimum chimney sizes should be used. See Table 5-1.
11. Combustion Air - An adequate supply of combustion air must be available to ensure proper combustion.
12. Interlock - If a damper is used to provide make-up air for combustion, it must be interlocked with the burner
to prevent the burner starting before the damper is opened.
Potential Condensation - Oversized chimneys, outside masonry chimneys, and/or de-
rated inputs can result in flue gases condensing in the chimney.
10
o
F or condensation may occur.
9 "
VS80-130
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