Worcester HIGHFLOW 400 ELECTRONIC RSF Manuale utente

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: (01905) 754624. Fax: (01905) 754619.

Technical Helpline (08705) 266241.

www.worcester-bosch.co.uk

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