Bleed Air From Boiler Heat Exchanger; Fill Siphon With Water - Viessmann VITODENS 200-W WB2B Start-Up/Service Instructions

Steps
I
nitial start-up
E
C A
Fig. 4
I
nitial start-up
B
C
A

1. Bleed air from boiler heat exchanger

1. Close isolation valves (not shown)
connected to A and B.
D
2. Connect drain hose to drain valve
C, and connect fill hose to boiler
fill valve F.
3. Close isolation valve D (located
inside the boiler).
4. Open fill valve F.
5. Bleed air from boiler heat exchanger
via isolation valve E and out
B F
through drain valve C until no
more air noise is audible.
6. Close isolation valve E and open
isolation valve D.
7. Bleed air from boiler heat exchanger
via isolation valve D and out
through drain valve C until no
more air noise is audible.
8. Close fill and drain valves C and
F. Open isolation valve E.
9. If the control unit has not been
switched ON prior to filling the
system, switch the control to ON,
and activate the air bleed program
by setting coding address "2F" to
"1" (boiler pump sÖ will be switch
ON and OFF for 30 sec. at a time
over a period of 20 minutes. The
program is automatically disabled
after 20 minutes, and coding
address "2F" is set back to "0").
10.Check system pressure.
11.Ensure adequate fuel supply exists
and open gas shutoff valve.

2. Fill siphon with water

1. Pull off cap A downwards.
2. Undo union nut B and pull off
siphon C downwards.
3. Fill siphon C with water, and
reassemble.
4. Push on cap A from below.
Initial Start-up and Service
Isolation valves D and E must be
open for the boiler to operate
properly (each flow pipe through
valves D and E is equipped with a
flow switch).
To access coding level 1 and setting
the coding address see page 39. For
function and sequence of the air
bleed program, see page 67. While
the air bleed program is running, the
display will show "Entlüftung"
(bleeding air).
Max. operating pressure...60 psig
Min. operating pressure...14 to 23 psig
Pressure relief valve.......30 psig
13