Glow-worm Ultrapower sxi - Manual (Page 32)

32
12 Servicing
If the combustion reading is not within the acceptable values
AND the integrity of the complete flue system and combustion
circuit seals have been verified and the inlet gas pressure
(and gas rate) have been verified, then, it will necessary to
adjust the combustion rate of the appliance.
NOTE: Adjustment is made by turning the gas valve throttle
an ⅛ of a turn, waiting 1 minute to allow the appliance to
stabilise before checking or making further adjustments.
● Remove the sticker covering the “throttle” adjustment screw,
if fitted.
● Rotate the “throttle” (anti-clockwise to increase), to the
required CO2, refer to diagram 12.13 and the “SETTING”
column in the table.
● Exit the forced rate function, press the “mode” and “+”
buttons simultaneously, this will reset the boiler to the default
display. Now proceed to check the minimum rate adjustment.
GAS RATE CHECK
Check the gas rates as described in the commissioning
section.
COMPLETION
If it is not possible to achieve the required results for either
the combustion or gas rates, it will be necessary to complete
a full service of the appliance and then repeat the combustion
check procedure. If after servicing and adjustment of the
appliance the combustion values are still unacceptable
and after further remedial work has been carried out, the
appliance must be disconnected until the CO/CO2 ratio
is acceptable. Advice can be sought from the Glow-worm
Technical Helpline.
12.1 Servicing
NOTE: If the Combustion CO2, CO/CO2 ratio and Gas rate
checks did not require adjustment then it will not be necessary
to complete a full service.
All routine servicing requirements can be achieved by the
removal of the front panels, see diagram 12.2.
Position the control box and domestic expansion vessel into
their service positions, see diagrams 12.3 to 12.6.
Before commencing with a service or replacement of parts.
The boiler should be isolated from the electrical and gas
supplies see diagram 11.1 for the position of the gas service
isolation valve.
BOILER MODULE
FRONT PANEL
SECURING
SCREW (2 OFF)
13440
Diagram 12.2
Diagram 12.3
13417
CONTROL BOX
MOUNTING BRACKETS
CONTROL BOX
SERVICE
BRACKET
*
To move the control box into its service position
carefully pull the control box forwards and
upwards to release from its mounting brackets.
BOILER
MODULE
*
CONTROL BOX
CONTROL BOX
SERVICE BRACKET