Start-Up And Service; Initial Start-Up - Viessmann VB2 Series Start-Up/Service Instructions

Initial Start-up

See Operating Instructions, Service Instructions of
Power Burner and Boiler Control
1. Ensure combustion and ventilation air
openings of boiler room are open and
that chimney and all flue pipes are
connected, sealed and unobstructed
inside. Verify that all requirements in
the Combustion Air Supply section of
the boiler Installation Instructions are
met.
2. Ensure proper operation of expansion
tank (see Maintenance/Service
manual).
3. Ensure that system piping is flushed
out to remove debris and/or sludge.
Failure to do so could cause
settlement in the boiler causing
overheating and damage not covered
by warranty.
4. Fill heating system with water and
bleed out air completely. Ensure
complete system is properly vented
of air.
Max. system operating press.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure relief discharge press.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. Perform a pressure test of the boiler
and the water piping. Pressure test
must not exceed 1½ times the
maximum system operating pressure
(45 psig ) of the boiler. Pressure
relief valve must be removed during
pressure test. Any leaks must be
corrected.
6. Ensure fuel proper/adequate fuel
supply exists; open oil or gas shut-off
valve.
WARNING
DO NOT USE GASOLINE
CRANKCASE DRAININGS OR ANY
OIL CONTAINING GASOLINE.
7. Verify completeness of all discussion
points on the following pages in the
section entitled Service before
starting up system.

Start-up and Service

WARNING
Keep boiler clear and free from
combustible materials, gasoline, and
other flammable vapors and liquids.
Do not obstruct the flow of
combustion and ventilation air.
If the nitrogen pressure of the
precharged expansion tank is less
than the static pressure of the
system, inflate membrane pressure to
slightly exceed pressure of system.
The static pressure required at the
tank is based upon the static height
of the system.
Water treatment should be considered
in areas where it is known that boiler
feed water contains a high mineral
content and hardness.
<30 psig In areas where freezing might occur,
an antifreeze may be added to the
30 psig system water to protect the system.
Please adhere to the specifications
given by the antifreeze manufacturer.
Do not use automotive silicate-based
antifreeze.
Please observe that an
antifreeze/water mixture may require
a backflow 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. System also may
contain components which might be
negatively affected by antifreeze.
Check total system frequently when
filled with antifreeze.
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