Worcester HIGHFLOW 400 ELECTRONIC RSF Conversion Instructions

CONVERSION INSTRUCTIONS

HIGHFLOW 400
ELECTRONIC RSF
THESE INSTRUCTIONS SHOULD BE USED IN CONJUNCTION
WITH THE MAIN INSTALLATION & SERVICE INSTRUCTIONS
ONLY COMPETENT PERSONNEL SHOULD ATTEMPT THE CONVERSION
ONLY COMPONENTS SUPPLIED BY WORCESTER HEAT SYSTEMS SHOULD BE USED
Conversion Kit:
Component Qty
Burner 1
Burner Injector 1
Pilot Burner Injector 1
PCB Link 1
Fan Restrictor Assembly 1
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
Natural Gas to LPG
LPG to Natural Gas
Part Numbers
NG to LPG LPG to NG
8 716 142 608
8 716 156 338 8 716 156 337
8 716 148 153 8 716 156 300
8 716 104 555
8 716 120 706
7 716 192 304
7 716 192 305
Fig. 1 Fan Restrictor Assembly
Venturi fixing screws
+
Connection
Silicone tube
Connection