Setting The Co₂ Content; Removing The Compact Thermal Module - Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

12.6 Setting the CO₂ content
Condition: The CO₂ content must be adjusted
▶
Remove the sticker.
▶
Remove the covering cap (1).
▶
Turn the screw (2) to set the CO₂ content (value with
front casing removed).
◁
To increase the CO₂ content: Turn anti-clockwise
◁
To decrease the CO₂ content: Turn clockwise
Note
For natural gas only: Only perform the adjust-
ment in small increments of a 1/8 turn and
wait approx. one minute after each adjust-
ment until the value stabilises.
For liquefied petroleum gas only: Only per-
form the adjustment in extremely small incre-
ments (approx. 1/16 turn), and wait approx.
one minute after each adjustment until the
value stabilises.
▶
Compare the measured value with the corresponding
value in the table.
Setting the CO₂ con-
tent
CO₂ at full load
Set for Wobbe index
W₀
O₂ at full load
CO at full load
CO/CO₂
36
1
2
Removed Fitted front
front casing casing
Natural gas H Natural gas H
9.0 ±0.2 vol. % 9.2 ±0.2 vol. %
14.09 kW⋅h/m³ 14.09 kW⋅h/m³
4.5 ±1.8 vol. %
≤ 250 ppm ≤ 250 ppm
≤ 0.0028 ≤ 0.0028
Setting the CO₂ con-
tent
CO₂ at full load
Set for Wobbe index
W₀
O₂ at full load
CO at full load
CO/CO₂
▽
If the setting is not in the specified adjustment range,
you must not start up the product.
▶
Contact customer service.
▶
Check whether the air-quality requirements with regard
to carbon monoxide are fulfilled.
▶
Refit the covering cap.
▶
Install the front panel.
12.7

Removing the compact thermal module

Note
The compact thermal module consists of four
main components:
– Speed-regulated fan,
– Gas-air mixture unit,
– Gas supply (mixture pipe) with burner flange,
– Premix burner.
Danger!
Risk of death and risk of material damage
caused by hot flue gas.
The seal, insulating mat and self-locking nuts
on the burner flange must not be damaged.
Otherwise, hot flue gases may escape and
cause personal injury and material damage.
▶
Replace the seal each time you open the
burner flange.
▶
Replace the self-locking nuts on the
burner flange each time you open the
burner flange.
▶
If the insulating mat on the burner flange
or on the back wall of the heat exchanger
shows signs of damage, replace the insu-
lating mat.
1. Switch off the product using the on/off button.
2. Close the gas stopcock.
3. Remove the front casing.
4. Tilt the electronics box forwards.
Installation and maintenance instructions ecoTEC sustain 0020253094_05
Removed Fitted front
front casing casing
Liquefied pet- Liquefied pet-
roleum gas P roleum gas P
10.1 ±0.2 vol. 10.3 ±0.2 vol.
% %
21.34 kW⋅h/m³ 21.34 kW⋅h/m³
5.1 ±0.8 vol. %
≤ 250 ppm ≤ 250 ppm
≤ 0.0025 ≤ 0.0025