Optima Optima 901, User Instructions

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901
6
3.0 VENTILATION
If the appliance is installed in a compartment or cupboard, do not obstruct any purpose provided
ventilation openings. Do not usethe compartment or cupboard for storage purposes.
4.0 FROST PROTECTION
Note - The boiler has its own built-in frost protection which automatically fire the boiler in low
temperature situations irrespective of the selector switch setting. Electricity supply must be left on.
For frost protection of the system (radiator, etc.), a frost thermostat can be fitted, or if the boiler is turned
off for long periods contact your installer or other competent person to drain the system. The system
must be re-filled by your installer or other competent person.
5.0 HIGH LIMIT CUT-OFF THERMOSTAT
The boiler is fitted with a safety overheat cut-off thermostat, should it operate the pilot burner will go out.
Should this happen, wait at least 3 minutes before attempting to re-light the boiler. The boiler should
be relight in accordance with the «Boiler Lighting Instructions». If the safety overhead cut-off
thermostat continues to fail consult your installer, service engineer or other competent person.
6.0 If the pump sticks, it can usually be freed by removing the chrome center screw (a small amount of water
will escape) and manually free the impeller using a screwdriver in the end of the shaft.
Simple Checks
If a fault is suspected or discovered, you should contact your installer, service engineer or other competent person.
The following list however, is a series of simple checks that should be made before contacting your installer:
a) Is the plug properly located in the socket and 3 amp fuse intact?
b) Is the electricity supply switch on?
c) Is gas supply on and is pilot alight?
d) Is the room thermostat (if fitted) set high enough?
e) Is the boiler thermostat set high enough?
f) Is the time clock in the ON position? (i.e. calling for central heating)
g) Are the radiator valves open?
h) Is the central heating selector switch set correctly?
i) Is the pressure on the pressure gauge indicating more than 1 bar?
Time Clock
A 24 hour time clock is fitted to the boiler to control the central heating, this will come into operation when the selector
switch is turned to the position marked “heating timed and hot water”.
AUTO
+
-
R
OVER RIDE
12:31
x
x
4
A
B
E
R D P
AUTO P
O I
F
P
A Slide switch: set clock - auto - set programme
B Display. Symbol in Display = Timer ON
P Select programme ON/OFF 1.....8
D Push buttons Time + Time -
E Override: Boiler will switch ON if boiler is OFF;
and OFF if is ON
F I=Heating continuous - AUTO=Heating timed - O=Heating disabled
R Reset (with pencil) only with switch A in set clock position