Worcester 47-406-54

Inspection/Maintenance
6 720 811 922 (2014/07)46
▶ If the pointer is below 1 bar (when the system is cold), top up with
water to the system until the pointer is between 1 bar and 2 bar
again.
▶ If there is a pressure drop: check the expansion vessel and heating
system for leaks.
10.1.14 CHECKING WIRING
▶ Check wiring for physical damage and replace faulty leads or cables.
10.1.15 CLEANING OF OTHER COMPONENTS
▶ Clean the electrodes, replace if there is any sign of erosion.
10.2 SHORT PARTS LIST
Pressure gauge reading
1 bar Minimum system pressure (when cold)
1 - 2 bar Optimum system pressure
3 bar Maximum system pressure at maximum central
heating system temperature:
must not be exceeded (safety valve opens).
Table 26
Fill the hose with water before topping up the heating
system. This will prevent air entering the central heating
system.
Burner 8 718 120 609 0 Burner gasket 8 711 004 325 0
Electrodes set with Gasket
8 737 600 795 0
Expansion Vessel
8 716 142 502 0
Temperature limiter assembly
8 710 506 267 0
Temperature sensor
8 714 500 087 0
Fan 8 717 204 410 0 Pressure gauge 8 718 224 344 0
Table 27
High limit stat 8 707 206 196 0 PRV 8 716 010 793 0
Gas Valve 8 716 012 485 0 Pump 8 716 010 880 0
Heat Exchanger 8 716 771 987 0 Diverter valve motor
8 718 642 957 0
DHW Temperature sensor
8 716 010 809 0
Flow limiter
8 716 141 054 0 – 8 Litres
8 716 141 057 0 – 10 Litres
8 716 141 061 0 – 12 Litres
Flow turbine
8 717 002 132 0
Pressure gauge assy
8 716 011 067 0
Controller circuit board
8 737 702 958
Fuse 1.6A 1 904 522 740 0
Fuse 0.5A 1 904 522 730 0 Fuse 2.5A (Pack of 10)
1 904 521 342 0
Auto Air Vent 8 718 505 039 0 Terminal end 8 718 681 828 0
Table 27