Checking The Rotary Damper Setting - Viessmann MatriX Service Instructions For Contractors

Commissioning, inspection, maintenance
Checking static pressure and supply pressure
Supply pressure
(flow pressure)
< 15 mbar (1.5 kPa)
15 to 18 mbar
(1.5 to 1.8 kPa)
18 to 50 mbar
(1.8 to 5 kPa)
> 50 mbar (5 kPa)

Checking the rotary damper setting

Fig. 6
1. Open the gas shut-off valve.
2. Check the position of the rotary damper with the
burner in idle mode. Rotary damper windows
must be fully opened. Scale ring
damper servomotor must be set to "0", relative to
marking .
B
3. Check the control cable; see page 15:
Connection and kink-free routing
■
■ Application and seating of retaining clips
4. Start the burner.
14
Measure
Do not make any adjustments. Notify the gas supply utility.
Please note: The boiler may only be operated temporarily with this setting (emergen-
cy mode).
Notify the gas supply utility.
Start the boiler.
Install a separate gas pressure governor with zero off upstream of the boiler system,
and set the pressure to 20 mbar (2 kPa).
Notify the gas supply utility.
A
A
C on the air
(cont.)
0
0
B C
5. Check the position of the rotary damper during the
start-up phase. Rotary damper windows
be almost closed for approx. 5 s. During this time,
scale ring must be set as follows:
C
Rated heating Rated heat in-
output put
P Q
max max
(50/30 °C) cv]
in kW
400
500
630
must
A
Rotary damper
setting
(H ) [net
i
in kW
381
474
593
in °
30
20
30