Glow-worm Betacom 3 - Setting the CO₂ Content; Removing the Gas-Air Mixture Unit

Inspection and maintenance 11
0020229560_00 Betacom 3 Installation and maintenance instructions 23
Checking the CO₂ content
Great Bri-
tain
Removed
front cas-
ing/installed
front casing
Natural gas
G20
9.2 ±1 %
◁ The value is OK.
▽ The value is not OK; you cannot start up the
product.
▶ Set the CO₂ content. (→ Page 23)
11.4 Setting the CO₂ content
Conditions: The CO₂ content must be adjusted
1
▶ Turn the screw (1) 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
▶ Only carry out the adjustment in increments of 1/8 turn
and wait approximately 1 minute after each adjustment
until the value has stabilised.
▶ Compare the measured value with the corresponding
value in the table.
Setting the CO₂ value
Great Britain
Removed front cas-
ing/installed front
casing
Natural gas
G20
CO₂ at full
load
9.2 ±0.2 %
Set for
Wobbe
index W₀
14.09 kW⋅h/m³
O₂ at full
load
4.5 ±1.8 vol. %
CO at full
load
≤ 250 ppm
CO/CO₂
≤ 0.0027
▽ If the setting is not in the specified adjustment range,
you must not start up the product.
▶ Inform Customer Service.
▶ Check whether the air-quality requirements with regard
to carbon monoxide are fulfilled.
▶ Install the front casing.
11.5 Removing the gas-air mixture unit
Note
The gas-air mixture unit consists of three main
components:
– Ventilator
– Gas valve,
– Burner cover
1. Switch off the product via the main switch.
2. Close the gas isolator cock.
3. Remove the front casing. (→ Page 10)
B
A
1
C
2
4. Push the clip (1) upwards.
5. Remove the flue pipe (2).
3
4
5
A
B
6. Remove the air intake pipe (3).
7. Remove the plugs from the gas valve (4) and from the
fan (5).