Worcester HIGHFLOW 400 ELECTRONIC RSF User manual

CONVERSION INSTRUCTIONS
HIGHFLOW 400
ELECTRONIC RSF
THESE INSTRUCTIONS SHOULD BE USED IN CONJUNCTION
WITH THE MAIN INSTALLATION & SERVICE INSTRUCTIONS
ONLY COMPONENTS SUPPLIED BY WORCESTER HEAT SYSTEMS SHOULD BE USED
Conversion Kit:
Natural Gas to LPG 7 716 192 304
LPG to Natural Gas 7 716 192 305
Component Qty Part Numbers
NG to LPG LPG to NG
Burner 1 8 716 142 608
Burner Injector 1 8 716 156 338 8 716 156 337
Pilot Burner Injector 1 8 716 148 153 8 716 156 300
PCB Link 1 8 716 104 555
Fan Restrictor Assembly 1 8 716 120 706
SHUT OFF GAS AND ELECTRIC SUPPLIES TO THE APPLIANCE
CONVERSION: NATURAL GAS TO LPG
1. Remove the burner as described in Section 15.2.5 and discard.
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. Release the venturi and re-assemble
incorporating the fan restrictor assembly. Join the restrictor to the adjacent venturi connection
(+Ve) using the short length of silicone tube supplied. Refer to Fig. 1 of this leaflet.
5. Refit the fan assembly and re-connect the sensing
tubes. Note: +tube to the restrictor inlet. Clear tube to
the Ve side of the venturi. Refer to Fig. 1 of this leaflet.
6. Re-assemble the appliance using the new injectors
and the new burner.
7. Remove the facia and fit the link to 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 minimum
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.
REFER OVERLEAF FOR LPG TO NG CONVERSION
ONLY COMPETENT PERSONNEL SHOULD ATTEMPT THE CONVERSION
Fig. 1 Fan Restrictor Assembly
+Connection
Silicone tube
Connection
Venturi fixing screws

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: [phone]. Fax: [phone].
Technical Helpline [phone].
www.worcester-bosch.co.uk