Viessmann VB2 Series Start-Up/Service Instructions page 10

Start-up and Service
Service
(continued)
5. Close combustion chamber door
6. Check heating system and domestic hot water connections
7. Ensure proper operation of all safety devices
10
Ensure proper operation of low water
cut-off(s), pressure relief valve, and
pump(s).
Flush float type low water cut-offs (if
used).
If oil-lubricated pumps are used, ensure
proper lubrication.
1. Push in combustion chamber insert
as far as it will go. Handle
must be at bottom.
IMPORTANT
The combustion chamber insert has a
lip at the back. Push combustion
chamber insert into combustion
chamber so that lip slides into matching
notch at the back of the combustion
chamber. Failure to do so will damage
door refractory when door is closed.
2. Close combustion chamber door
and tighten four bolts in a cross-wise
fashion.
3. Reconnect burner fuel line(s).
4. Mount burner hood (if applicable).
WARNING
Reconnect oil burner and follow
instructions found in burner
installation/start-up manual.
WARNING
For gas burner, perform necessary
leak detection tests.
Ensure all connections are pressure
tight.
If motorized zone valves are used,
check and service as necessary.
Refer to manufacturer's instructions for
each of the components listed above.
Follow local regulations with respect to
backflow preventers.