Glow-worm economy plus c 50 Instructions For Use, Installation & Servicing page 18

7.13 Replacement of Flue Blockage
Safety Device
Gain access generally as section 7.1 and Diagram 7.12
Inset A. Remove phial assembly by removing the brass knurled
screw(s).
Inset B. Carefully remove phial and capillary through back of
boiler.
Inset C. Having opened control box remove the electrical
connections from the flue blockage safety device, the locknut
and capillary retaining clip. Fit new flue blockage safety device
in reverse order, making sure that the capillary is secure and
there is sufficient slack at the control box to allow the box to be
opened and closed without damaging the capillary.
Important. Make sure the phial assembly is correctly located on
the two locating studs.
When refitting make sure that the capillary is clear of hot
surfaces, to avoid nuisance shut down of boiler.
INSET A
BRASS
KNURLED
NUTS
FLUE BLOCKAGE
SAFETY DEVICE
221462C
7 Servicing and Replacement of Parts
BRACKET
PHIAL
INSET C
LOCKNUT
PLASTIC
RETAINING
CLIP
INSET B
GROMMET
PLATE
(behind duct)
CAPILLARY
18
SECURING
SCREW for
Grommet Plate
Diagram 7.12