Start-Up; System Preparation; Combustion Air Supply; Initial System Fill - Viessmann VITOROND 200 VD2A-125 Installation Instructions Manual

Start-up

System Preparation

WARNING
Failure to provide an adequate supply of fresh
combustion air can cause poisonous flue gases
to enter living space which can cause 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 or put anything
inside the draft hood.
Advise system operator/ultimate owner accordingly.
WARNING
The boiler must not be located in areas or rooms
where chemicals are stored, or aggressive vapors
from (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.

Initial System Fill

Ensure that spring-loaded flow check valves are manually
opened prior to filling the heating system with water.
Once the system is completely filled and purged of air,
ensure that spring-loaded flow check valves are again
closed (set into "flow-check" operation).
Water treatment should be considered in areas where
it is known that boiler feed water contains a high mineral
content and hardness.
In areas where freezing might occur, an antifreeze may
be added to the system water to protect the system.
Please adhere to the specifications given by the antifreeze
manufacturer. Do not use automotive silicate-based
antifreeze.
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Vitorond 200, VD2A Series Installation

Combustion air supply

Provisions for combustion and ventilation air must be made
in accordance with applicable local codes.
In the absence of local codes, use CAN/CSA-B149.1 or .2
Installation Codes for Gas Burning Appliances for Canada.
For U.S. installations use section 5.3, Air for Combustion
and Ventilation, of the National Fuel Gas Code ANSI
Z223.1.
For oil burning installations use CSA B-139 for oil
installations in Canada and NFPA 31 Standard for the
Installation of Oil Burning Equipment in the US.
Always use latest editions of codes.
Whenever possible, install boiler near an outside wall
so that it is easy to duct fresh air directly to the boiler
area. Refer to national codes for duct sizing and allowable
lengths. Round ducts can be used.
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.
Please observe that an antifreeze/water mixture may
require a back flow preventer within the automatic water
feed and influence components such as diaphragm
expansion tanks, radiation, etc.
A 40% antifreeze content will provide freeze-up
protection to -10°F (-23°C). Do not use antifreeze other
than specifically made for hot water heating systems.
The system also may contain components which might
be negatively affected by antifreeze. Check total system
frequently when filled with antifreeze.