Worcester Greenstar 12i System Instruction Manual page 37

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IHGT/UMION 6 SEIMONG INSTRVCTlONS FOR WORCESTER GAttNS"t.vl 121 S,~
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INSPECTION AND S ERVIC E
Component Access
1. Removl ng outer case
1. Remove bottom panel by pvn;ng rt forward
aod off.
1.1 UOOo and femcwe 2 scfews (A) secu(lng
boiler casing at the
top
of the appliance.
1.2 Undo but do not remove the 2 screws
(B) sec:uring boiler casing at the bottom of
the appliance.
1.3 Pull case forward and remove.
2. Adjusting boiler control to
service position
2.1 Remove screw (C) securing control.
2.2 Gently pull forward until it comes to
rest in service position.
Primary Heat Exdlanger
There is a spedal accassory kit available
specifically designed for cleaning the
heat exchanger. lf required order
7 716 1 92 312.
3 Check fan Pfessure
at
the test point next to
the tan using an electronic manometer.
,. The boiler must be run at maximum output
Pressure
will
read negative and be greater
than:
Natural gas LPG
1 2i System- 3.1 ml>ar 1 2i System - 4.9 mbar
241 System - 3.1 mbat 241 System - 4.1 mbar
• Pressures measuted below these figures
will indicate that the heat exchanger will
require c~ani ng.
INSPECTION AND SERVICE