Procedures; Preparations Prior To Start-Up - Viessmann Vitogas 100 GS1 Series Start-Up/Service Instructions

Initial Start-up and Service

Procedures

I
nitial start-up
8

1. Preparations prior to start-up

Vitotronic Boiler Controls
1. Ensure fresh air intake of mechanical
room is open and that chimney and
all flue pipes are connected, sealed
and unobstructed inside.
Verify that all requirements in the
Combustion Air Supply section in the
Vitogas 100, GS1 Installation
Instructions are met.
2. Ensure proper operation of expansion
tank (see Maintenance/Service
manual).
3. To remove debris and/or sludge
ensure that the system piping is
flushed out. 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. boiler operating press.
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Pressure relief discharge press.
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5. Perform a pressure test of the boiler
and the water piping. Pressure test
must not exceed 1½ times the
maximum system operating pressure
(60 psi ) of the boiler. Pressure
relief valve must be removed during
pressure test. Any leaks must be
corrected.
6. Adjust fill pressure to a level
compatible with normal operation.
Recommended operational
fill pressure
. . . . . . . . . . . . . . . . .
when system is cold.
7. Reinstall pressure relief valve.
8. Ensure proper/adequate fuel supply
exists; open gas shut-off valve.
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. The system fill
pressure value must be equal to the
expansion tank pressure value at
approx. 60 ºF/15.6 ºC.
Water treatment should be considered
in areas where it is known that boiler
feed water contains a high mineral
content and hardness.
60 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.
10 - 15 psig 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.