(fig. 7.4)
•
Close boiler drain valves (located
above boiler flow and return servi-
ce valves).
•
Open flow and return service val-
ves at the appliance. Fill appliance
to 2 bar, (refer to section 5 of the
installation and servicing instruc-
tions supplied with the boiler).
•
Test joints for soundness.
Carry out visual check.
•
Check that the cap on the automa-
tic air vent is open 1 to 2 turns.
•
Re-connect the following plug-in
connections (see fig. 6.1, page 6):
plug at the supervision electrode
(3), two black AMP-plugs at the
NTC-sensor of the flow pipe (5, 6),
ignition plug and earth cable at the
ignition electrode (7, 8).
•
Connect extension lead for the
NTC-sensor (at the heat exchanger
on the right) with the red AMP-plug.
(formerly connected to old heat
exchanger NTC positioned on left
hand side, see 1, fig. 7.4). Locate
this connecting lead into the rear
leaf spring (2) below the heat
exchanger (see fig. 7.4).
A lead loosely laid in the combustion
chamber can be damaged by the
spring of the condensation sump.
14
Fig. 7.3
Fig. 7.4
NOTE
(fig. 7.3)
•
Align heat exchanger.
The locating lugs must fit into the
hole (1) and the slot (2) of the
upper brackets.
•
Tighten the four retention nuts (3).
Start with the retention nut on the
upper right and proceed anti-clock-
wise.
GW 895/0
GW 896/0