Fan Pressure Test; Environmental Protection; Inspection/Maintenance - Worcester GREENSTAR 24 Installation, Commissioning And Servicing Instructions

Environmental protection

8.6

FAN PRESSURE TEST

This test is to determine if the heat cell requires cleaning
or attention
NOTICE: Fan pressure test
▶ The boiler must be run at maximum output for the
fan pressure test and flue gas analysis.
▶ Check control pressure at maximum rated output at the mixer unit.
1. Remove the fan pressure test point cover.
2. Connect the digital manometer to the fan pressure test point.
2 .
1 .
Fig. 64 Fan pressure test point
With the combustion air intake pipe fitted and the boiler running at
maximum output, measure the fan pressure:
▶ The pressure reading will be negative, refer to fig 65
▶ If the manometer reading is in the white area of the chart the heat
exchanger/exhaust path/siphon does not require attention.
▶ If the manometer reading is in the black area of the chart then carry
out the following checks:
– Check that the siphon is not blocked.
– Check the exhaust paths for restrictions.
– Clean the heat exchanger with a suitable cleaning tool, refer to
section 10.1.2 - Checking the heat exchanger.
FAN PRESSURE TEST
Clean the Heat Ex.
NG Boilers
Greenstar 28:
- 3.1
Greenstar 24:
0 -1 -2 -3
Fig. 65 Fan pressure readings
▶ Re-check the fan pressure readings.
If the boiler, after completing the above checks, fails the fan pressure
test then contact Worcester, Bosch Group for advice.
▶ After the measurements are taken switch the boiler off.
▶ Remove the combustion air intake pipe.
▶ Disconnect the manometer and replace the test point cover.
▶ Replace the combustion air intake pipe.
40
6 7 2 0 6 1 1 6 2 6 - 7 8 . 1 R
Heat Ex. ok
- 3.9
-4 -5 -6 -7 -8
9 ENVIRONMENTAL PROTECTION
Environmental protection is a fundamental corporate policy of the Bosch
Group.
The quality of our products, their economy and environmental safety are
all of equal importance to us and all environmental protection legislation
and regulations are strictly observed.
We use the best possible technology and materials to protect the
environment taking account of economic considerations.
PACKAGING
We participate in the recycling programmes of the countries where our
products are sold to ensure optimum recycling.
All of our packaging materials are environmentally compatible and can
be recycled.
USED APPLIANCES
Used appliances contain valuable materials that should be recycled.
The various assemblies can be easily dismantled and synthetic materials
are marked accordingly. Assemblies can therefore be sorted by
composition and passed on for recycling or disposal.
10

INSPECTION/MAINTENANCE

To ensure that gas consumption and environmental impact (pollution
etc.) remain as low as possible over an extended period of time, we
recommend that you take out an inspection/maintenance contract with
an authorised contractor covering the annual inspection and servicing
and maintenance at other times as required.
DANGER: Risk of explosion
▶ Turn off gas tap before working on components in
contact with gas.
▶ Check for leaks before working on components in
contact with gas.
DANGER: Risk of poisoning
▶ Check for leaks before working on components in
contact with gas.
DANGER: Risk of electric shock
▶ Always disconnect the power supply to the appliance
at the mains before carrying out any work on the
electrical systems and components (fuse, circuit
breaker).
CONTROL UNIT
If a component fails, a fault is indicated on the display.
All safety, modulation and control components are monitored by the
Control unit.
NOTICE: Leaking water may damage the Control unit.
▶ Cover the Control unit before working on any parts
that carry water.
IMPORTANT NOTES
An overview of fault codes is given on page 48.
• The following test equipment is required:
6 720 811 922 (2014/07)