Combustion Air Supply - Viessmann Vitoflex 300-RF 150 Service And Maintenance Instructions

Vitoflex 300-RF Service & Maintenance

Combustion Air Supply

Codes
Provision for combustion and ventilation air must be made
in accordance with applicable local codes.
In the absence of local codes, use:
CSA B365-10, Installation Code for Solid Fuel Burning
Appliances and Equipment.
Always use latest edition codes.
WARNING
Failure to provide an adequate supply of fresh combustion
air can cause poisonous flue gases to enter living space.
Flue gases entering living space can cause carbon
monoxide poisoning which can result in severe personal
injury or loss of life.
WARNING
Never cover the boiler or store debris or other materials
near the boiler, or in any way block the flow of adequate
fresh air to the boiler. Never cover the combustion air
opening. Advise system operator/ultimate owner
accordingly.
WARNING
The boiler must not be located in areas or rooms where
chemicals are stored, or aggressive vapors (i.e. bleach,
hair spray, methyl chloride, carbon tetrachloride or
perchloroethylene) or high dust levels or humidity levels
are present. Heat exchanger corrosion might occur and
reduce the lifetime of the boiler significantly. If above
criteria are not properly observed and boiler damage
results, any warranty on the complete boiler and related
components will be null and void.
General
This equipment requires fresh air for safe operation.
The boiler location must never be under negative pressure.
Exhaust fans, attic fans, or dryer fans may cause air to be
exhausted at a rate higher than air can enter the structure
for safe combustion.
The heating contractor shall ensure all of the following
requirements are met:
- An adequate supply of combustion air must be
available to ensure proper combustion.
- Ambient air temperatures must be maintained within
safe operating limits.
- When a damper is provided in any opening intended
to admit combustion air into the room within which
the appliance is installed, the damper shall be
interlocked to prevent any boiler from starting
before the damper is fully open.
- Each duct used to convey air from the outdoors
shall have:
1. a cross-sectional area throughout its length at
least equal to the free area of the inlet and outlet
openings which it connects,
2. making a provision for outside combustion air,
the intake shall not be less than 1 ft. (0.3 m)
above the anticipated snow level for the location.
- The heating contractor must check with local
authorities (municipal building department) for
combustion air requirements particular to the area.
See "Installation and Operating Instructions" for more
details.
Safety
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