Viessmann VITOROND 100 Installation And Service Instructions Manual page 31

Initial Start-Up
Manometer and temperature
gage
Burner instructions.
WARNING
Verify completeness of all discussion
points on the following pages before
starting-up system.
1. Ensure fresh air intake of boiler room
is open and that chimney and all flue
pipes are connected, sealed and
unobstructed inside.
2. Ensure proper size and operation of
expansion tank. Undersized expansion
tanks cause fresh water to be added
to the system through fill valve. This
will cause premature section failure,
which is not covered by warranties.
3. Fill heating system with water and
bleed out air completely. Ensure
complete system is properly vented
of air.
4. Perform a pressure test of the boiler
and the water piping. Pressure test
must not exceed 1½ times the
maximum operating pressure (45 psi)
of the boiler. Pressure relief valve
must be removed during pressure
test. Any leaks must be corrected.
H the max. operating pressure is
45 psig / 310 kPa
H the max. testing pressure is
68 psig / 465 kPa.
5. Ensure proper and adequate fuel
supply exists; open oil shut-off valve.
Initial Start-up
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. Normal fill pressure for
most residential applications is 12 to
15 psig when the system is cold. A
lower pressure gage reading usually
indicates loss of water due to
leakage. All leaks must be corrected.
Refer to instructions packaged with
automatic fill valve. Follow local
regulations with respect to backflow
preventers.
Water treatment should be considered
in areas where it is known that boiler
feed water contains a high mineral
content and hardness. Contact local
water treatment company.
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. Ensure a copy of the
Material Safety Data Sheet is left on
site.
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. Follow
anti-freeze manufacturer's
instructions.
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