INSTALLATION
europa
Installation & Servicing
23
Wiring should be as shown, with minimal disturbance to other
wiring.
External Programmers
On the combi boilers, this should be of the single channel
type (as this boiler does not incorporate a pre---heat facility for
the instantaneous hot water service).
Programmers with room thermostat --- see diagram B.
Note. lf the boiler is installed in a garage it may be necessary
to fit a pipe thermostat, preferably on the return pipework.
Earths are not shown for clarity but must never be omitted.
A
Power supply
terminal block
External controls
terminal block
T
Room thermostat
T
Optional frost’stat
1
2
L
N
3
B
Power supply
terminal block
External controls
terminal block
T
Room thermostat
T
Optional frost’stat
1
2
L
N
3
External programmer
N.B. These diagrams are schematic only and do not show
external terminal strips etc.
25 INITIAL LIGHTING
Legend
A Appiance On lamp
B Domestic hot water temperature control
C Main switch and radiator temperature control
D Boiler reset button
E Lock---out signal lamp
F Programmer
G System pressure and temperature gauge
A
B
C
D
E
F
Central Heating flow
Domestic hot
water outlet
Gas inlet
Domestic cold
water inlet
Central Heating return
europa 224
europa 228
europa 232
G
IMPORTANT Before lighting the boiler you should note
especially that:
1 Check that all the drain cocks are closed and any valves
in the flow and return are open.
2 Check that the system has been filled and pressurised
and that the boiler is not air locked.
3 Remove boiler front panel.
4 Ensure that the pump is free to rotate
i
Remove the vent plug
ii Using a screwdriver, rotate the shaft several times
iii Replace the vent plug
Note
. Some slight water leakage will occur
5 Remove the screw in the burner pressure test point
indicated on the following picture and connect a gas
pressure gauge via a flexible tube.
Be sure to select the correct pressure test point. Refer to
Tables for pressures.
IN
S
T
A
L
L
A
T
IO
N
