Technical information

33
Combi 70 & Combi 90 Oil Boilers
Important: Ensure electrical supply to boiler has
been isolated before fitting the timer.
1 The Electronic Timer Kit (Ref. ETKIT) contains
the following items:
One ACL Type 711 7-day single channel
electronic timeswitch
One wiring harness
2 The wiring harness must be connected to the ACL
Type 711 Electronic Timer as follows:
Blue wire: To MAINS NEUTRAL (N)
terminal of timer
Red wire: To MAINS LINE (L) terminal of
timer
Brown wire: To ON terminal of timer
Brown wire: To COMMON terminal of timer
3 Remove the front top casing panel.
4 Remove the three screws holding the back of the
control panel in place and move it back enough to
allow access to the rear of the timer aperture.
5 From underneath the control panel, remove the
screw securing the bracket behind the timer
aperture. Withdraw and discard the bracket.
6 Remove the blanking piece from the timer aperture,
in the control panel fascia, by firmly pressing on the
Grant logo (in the centre of the black square) until it
is detached from the rear of the fascia. Remove the
blanking piece from the panel and discard.
7 Remove the two screws securing the terminal block
cover (see Fig. 17 or 19) and lift off the cover.
Remove the link from terminals 13 and 14.
8 Fit the 6-way plug on the timer wiring harness,
firmly into the 6-way socket, to connect the timer
to the boiler.
9 Carefully fit the timer into the aperture, and gently
push fully home.
10 Replace the wiring cover in position over the
terminal block, taking care not to trap any wires,
and secure in position with the two screws
previously removed.
11 Replace back of control panel and top casing panel.
Reconnect electricity supply and check operation
of timer. Refer to the User Instructions provided
for operating and setting the timer.
See Fig. 7
If a two pipe system is to be used refer to section 3.4.6.
1 Remove the oil inlet plug from the fuel pump and
connect the elbow of the flexible fuel line supplied
with the boiler.
2 Connect the flexible fuel line to the rigid supply using
the adaptor supplied. The supply enters through one
of the holes at the bottom of the case sides.
4 - BOILER INSTALLATION
Optional plug-in 7 day electronic timer
4.9
Fig. 31 - RDB burner components
1 Pump
2 Control box
3 Reset button with lock-out lamp
4 Flange with gasket (do not remove from boiler)
7
8
1
2
3
5
4
6
5 Air damper adjustment screw
6 Air supply tube connection (balanced flue)
7 Pump pressure adjustment screw
8 Pressure gauge connection
Connect the fuel supply
4.10