780622
23
Zoom out
Zoom in
Previous page
1/52
Next page
Commissioning
23
Condens 7000 WP – 6721841195 (2022/01)
8.3 Setting options for air/gas ratio control valve
Different air/gas ratio control valves are used depending on the rating
of the boiler. The positions of the various test ports and adjusting
screws vary accordingly.
Overview of air/gas ratio control valve GC7000WP 50, GC7000WP
65
Fig. 30 Overview of test ports and adjusting screws ≤ 70 kW
[1] Adjusting screw CO2/O2
[2] Gas pre-charge pressure test port
[3] Gas/air ratio test port
[4] Gas/air ratio adjusting screw
Overview of air/gas ratio control valve GC7000WP 85, GC7000WP
100
Fig. 31 Overview of test ports and adjusting screws ≥ 85 kW
[1] Adjusting screw CO2/O2
[2] Gas pre-charge pressure test port
[3] Gas/air ratio test port
[4] Gas/air ratio adjusting screw
[5] Without function
8.4 Measuring the gas standing pressure (static)
The gas standing pressure must be stable to guarantee correct
operation of the boiler. The measurement is carried out when the boiler
is switched off.
Switch off the appliance.
Remove the front panel.
Open the gas standing pressure test port by turning the adjusting
screw through 2 revolutions ( § 8.3, p. 23).
Set the pressure gauge to “0”.
Connect the pressure gauge to the test port.
Measure the static gas standing pressure.
Make a note of the value in the commissioning report ( § 15.7,
p. 50).
Close the inlet pressure test port.
8.5 Measuring the gas working pressure (dynamic)
The gas working pressure must be stable to guarantee correct operation
of the boiler. The measurement is performed at full load.
As the measurement is taken at the air/gas ratio control valve and not the
gas valve, the permissible gas working pressure may be reduced due to
the pressure drop between the gas valve and air/gas ratio control valve.
Example: GC7000WP 100 to natural gas H, G20.
Permissible gas pre-pressure: min. 17 mbar – max. 25 mbar (
Tab. 24, p. 48).
Pressure drop between gas valve and air/gas ratio control valve is
2.7 mbar ( Tab. 10).
Permissible limit values on the air/gas ratio control valve:
Min. 17 mbar – 2.7 mbar = 14.3 mbar.
Max. 25 mbar – 2.7 mbar = 22.3 mbar.
Table 10 Pressure drop between gas valve and air/gas ratio control valve
Calculate the permissible minimum and maximum gas pre-pressure.
Switch off the appliance.
Remove the front panel.
Open the gas inlet pressure test port by turning the adjusting screw
through 2 revolutions ( § 8.3, S. 23).
Set the pressure gauge to“0”.
Connect the pressure gauge to the test port.
Make sure the heating system can release its heat.
Operate the appliance.
Open the menu Function check > Burner.
Start the Function check by setting the value to 100%.
Check whether the measured value lies within the calculated limit
values.
If the measured value lies outside the calculated limit values, do not
commission the boiler. The cause must be established and the fault
rectified. If this is not possible, shut off the gas supply to the system and
contact the gas supplier.
Make a note of the measured value [mBar] after 1 minute in the
commissioning report ( § 15.7, p. 50).
▶Deactivate Function check.
Close the working pressure test port.
0010034262-001
32 4 1
0010034263-001
32 4
5
1
Max. pressure drop for each gas type
[mbar]
Type G20 G25 / G25.3
GC7000WP 50 1.5 2.0
GC7000WP 65 2.5 2.8
GC7000WP 85 2.6 3.3
GC7000WP 100 2.7 3.7
23


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Bosch Condens GC7000WP at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Bosch Condens GC7000WP in the language / languages: English as an attachment in your email.

The manual is 15.02 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Bosch Condens GC7000WP

Bosch Condens GC7000WP User Manual - English - 12 pages

Bosch Condens GC7000WP Installation Guide - German - 60 pages

Bosch Condens GC7000WP User Manual - German - 12 pages

Bosch Condens GC7000WP Installation Guide - Dutch - 56 pages

Bosch Condens GC7000WP User Manual - Dutch - 12 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info