Prior To Start-Up - Viessmann VD2-320 Installation Instructions Manual

Start-up
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.

Prior to Start-up

j Ensure that all turbulators are completely inserted into
the flue gas passageways (open combustion chamber
door).
j Ensure that combustion air openings and ventilation air
openings in mechanical room are open.
j Ensure the heating system has been filled with water
and is completely purged of air.
WARNING
Ensure the water quality was tested and is in
compliance with the guidelines for system-fill water.
Failure to do so may result in improper operation
and/or damage to the heating system.
j Check cold fill pressure of heating system.
j Check oil supply or proper natural or propane gas
supply pressure.
j Ensure proper barometric draft regulator is installed
(field supplied).
j Ensure clean out openings near flue gas collar are
closed tightly.
36
Vitorond 200, VD2 Series 320 to 1080 Installation
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.
The system also may contain components which might
be negatively affected by antifreeze. Check total system
frequently when filled with antifreeze.
j Open valve(s) in oil or gas fuel supply lines.
j Activate all switches for heating system - system
switch, heating system pump, burner power supply,
etc. (observe instructions given by burner
manufacturer).
j If cold-starting burner (or if restarting burner after
lengthy service procedures), close off heating system
supply to ensure the boiler passes through the
dew-point rapidly.
j Once the supply water temperature has risen above
the minimum, gradually open up the boiler supply and
return valves to the heating system, and switch the
burner to automatic.
j Check all gaskets and connections and retighten
if necessary.
j Check and retighten bolts of combustion chamber door
and clean-out opening covers several days after start-up.
Follow instructions of boiler control, oil and/ or gas power
burner during boiler start-up.