Boiler Function - Bosch Worcester Greenstar Danesmoor 12/18 Installation, Commissioning And Servicing Instruction Manual

~
Beller
overheat
......
thermostat
tripping out
Short
cycling.
r--.-
Flue
overheat
......
thermostat
tripping out
8720808218-90.1Wo
Is the system water
circulating normally?
No
'
Check and rectify the
system/circulating pump.
Is the boiler/burner
output matched to the
r
heating load?
No
'
Reduce the boiler/burner
output following the
instruction manual settings.
Is there an automatic bypass fined,
Yes.,. (3m min. circuit length), ifTRVs are
used on all radiators?
No
'
Fit an automatic bypass valve to give
at least a 3 metre circuit when
activated.
Is the short cycling
Yes-. caused by the external
controls?
No
'
Replace the control
thermostat.
Are all the baffles and
Yes.,..
Is the control thermostat
Yes.,. bulb pushed firmly down Yes.,.
the thermostat pocket?
No
'
Push themostat fully
down the thermostat
pocket
Check and correct all
external controls.
Is the boiler filled with
water?
Yes.,. restrictor plate/s fitted7 (See Yes.,..
Replace the flue
overheat thermostat
No
Check boiler & flue for damage,
replace any damaged
components before filling boiler.
installation section for details).
No
t
Refit baffles and restrictor
plate/s as appropriate for
output
Is flow temperature
above 85°?
No
t
Replace high limit stat
(manual reset).
-Yes.,. Replace control stat.
UNDER NO CIRCUMSTANCES
MUST AN APPLIANCE BE LEFT
OPERATING WITH ANY CONTROL
LINKED OUT OR OVERRIDDEN.