Expansion Vessel; Flue Gas Sensor - gledhill GB35C Design, Installation And Servicing Instructions

9.9

EXPANSION vESSEL

For access refer to section 9.1 General and for draining procedure section 9.5
Heat Exchanger. After ensuring the appliance is drained down release the flexible
connecting pipe from the hydraulic monoblock assembly by pulling the spring
clip forward and pulling the pipe upwards out of the monoblock and up through
the seal separating the boiler and hydraulic monoblock compartments. Pull the
expansion vessel towards the front of the boiler compartment slightly and then
tilt the top forwards to allow it to be removed.
NOTE: Check the air pressure of the new expansion vessel at the Schrader type
connector provided at the top of the expansion vessel and adjust if necessary
before fitting. When fitting the new expansion vessel check the 'O' ring is in
place on the connecting pipe before pushing into the hydraulic monoblock and
refitting the spring clip.
9.10

FLuE GAS SENSOr

For access refer to Section 9.1 General. Squeeze in the retaining clip on the side
of the electrical connector and pull forward to remove. Unscrew the sensor itself
using a 15mm AF spanner.
rEPLAcEMENT OF PArTS
Expansion vessel connector
Flue gas sensor
(electrical connection not shown)
Page 37