28
5.11 Checking flame
supervision device
Operate the boiler and turn off the
gas supply at the boiler gas service
valve. The boiler should attempt to
re-light (sparking at ignition electrode
visible through viewing window) for
approximately 9 seconds, if ignition
does not occur the boiler will
re-attempt ignition after a further 10
second delay before shutting down.
The lock out indicator light will
illuminate. Open the gas service valve
and turn the central heating control (2,
fig. 33) to the reset position ( ). The
boiler should now re-light.
5.12 Final system flush ('hot')
Allow the boiler and system to reach
maximum temperature and check that
the heating system is watertight. Turn
the boiler off and rapidly drain both
boiler and system while still hot.
Refill the system and release all air as
described in Section 5.4. Release
water from the system until the system
design pressure of 1.2 bar is attained.
(The actual reading on the pressure
gauge - (6, fig. 33) - should ideally be
0.5 Bar plus an additional pressure
corresponding to the highest point of
the system above the base of the
boiler - 10 m head equals an
additional 1 Bar reading on the
pressure gauge. The minimum pressure
should not be less than 1 Bar in any
installation).
If the system is to be treated with an
inhibitor it should be applied at this
stage. Sentinel X 100 is suitable for
this purpose and it should be applied
in accordance with the manufacturers
instructions.
Further instructions can be obtained
from Sentinel, Grace Dearborn Ltd,
Tel: 0151 4951861.
Disconnect the temporary filling
connection.
4
1
2
3
fig. 42
GW 605/1
2
1
fig. 43
GW 606/1
5.13 Fitting case
Attach top door panel by slotting side
clips (1, fig. 42) into holes in side
panel and sliding panel down to
secure. Attach bottom door panel by
locating onto top hinge pin (2, fig.
43) and inserting bottom hinge screw
(1, fig. 43) so that it also locates into
the door.
5.13.1 Door hinged at left hand side
If required the appliance lower door
can be altered to hinge on the
lefthand side.
Remove screws from bottom hinge pin
(1, fig. 43) and transfer to left hand
side panel.
Lift bottom of top hinge pin (2, fig.
43)away from casing to release
retaining lug. Rotate top hinge
through 90° to remove. Refit to left
hand side casing.
Attach bottom door panel by locating
onto top hinge pin (2, fig. 43) and
inserting bottom hinge screw (1, fig.
43) so that it also locates into the
door.
5.13.2 Fit bottom cover
Attach bottom cover to boiler by
locating over front screws (2, fig. 51)
and secure with rear screws
(1, fig. 51).
