SHUT OFF GAS AND ELECTRIC SUPPLIES TO THE APPLIANCE
CONVERSION: LPG TO NATURAL GAS
1.
Remove the burner as described in Section 15.2.5. Remove the end-cap and withdraw the
gauze tube. Replace and refix the end-cap.
2.
Remove the main burner injector as described in Section 15.2.6. and discard.
3.
Remove the pilot injector as described in Section 15.2.8. and discard.
4.
Remove the fan assembly as described in Section 15.3.2. Remove the fan restrictor assembly
(see Fig.1of this leaflet) and refix the venturi.
5.
Refit the fan assembly and re-connect the sensing tubes.
Note:
+
tube to the
+
Ve side of the
venturi. Clear tube to the Ve side of the venturi.
6.
Re-assemble the appliance using the new injectors and the new burner.
7.
Remove the facia and remove the link from the terminals marked LPG on the control board.
Refer to Fig. 54 of the Installation and Service instructions.
8.
Re-commission the appliance as described in Section 13 and reset the burner pressures. Refer
to Table 1. and Fig. 33.
IMPORTANT
: Set the maximum burner pressure before the minimum burner pressure. The mini-
mum burner pressure to be used is that for the hot water.
9.
Fix the appropriate labels and re-position the red arrow on the data plate to indicate the gas type.
10.
Up-date the Benchmark log book.
This leaflet is accurate at the date of printing but will be superseded and should be disregarded if specifications and/or appearances are
changed in the interests of continued improvement.
All goods sold are subject to our official Conditions of Sale, a copy of which may be obtained on application.
PUBLICATION 8 716 104 703a 12/01
Bosch Group
Worcester Heat Systems Limited, Cotswold Way, Warndon, Worcester WR4 9SW.
Telephone: (01905) 754624. Fax: (01905) 754619.
Technical Helpline (08705) 266241.
www.worcester-bosch.co.uk
