3
classic m -
User's
Operation
In normal operation the control unit display (F) will show the
codes:
O - Standby
(no demand for heat)
C - Heat demand being supplied.
During
ignition
the LED (E) will flash.
During
normal running
the LED will remain illuminated.
Note.
If the boiler fails to light after 3 attempts the fault code 'L' 'F'
will be displayed.
Press and hold the reset button (D) for 2 seconds then release.
The boiler will repeat the ignition sequence. If the boiler fails to
light consult a CORGI registered installer.
Control of water temperature
The boiler controls the central heating radiator temperature to a
maximum of 82
0
C, adjustable via the CH thermostat knob (C).
Approx CH flow temperatures for the boiler thermostat settings
are:
Knob Setting
Flow Temperature
0
C
0
F
Minimum
66
150
71
160
77
170
Maximum
82
180
To shut down the boiler
1. For short periods
Set the mains on/off switch (A) to OFF.
2. For longer periods
Set the mains on/off switch (A) to OFF. Switch the electricity
supply to OFF. For longer periods the entire system should be
drained, inlcuding the domestic hot water supply.
To relight the boiler
Repeat the procedure detailed in 'To light the boiler'.
Frost Protection
If no frost protection is provided and frost is likely during a short
absence from home leave the heating controls (if fitted) at a
reduced temperature setting.
For longer periods the entire system should be drained.
If the system includes a frost thermostat then,during cold
weather, the boiler should be turned OFF at the time switch (if
fitted) ONLY. The mains supply should be left switched ON, with
the boiler thermostat left in the normal running position.
Boiler Overheat Thermostat
This thermostat will shut down the boiler in the event of
overheating. Should this occur a fault code 'L' 'A' will be
displayed. Press the reset button (D) and the boiler will relight. If
the fault recurs turn off the boiler and consult a CORGI registered
installer.
CAUTION.
To avoid the possibility of injury during the installation, servicing or cleaning of
this appliance care should be taken when handling edges of sheet steel components.
F
B
C
D
E
A
Ecl 1624
Legend
A
Boiler on/off switch
B
"Mains on" LED
C
CH thermostat knob
D
Reset button
E
LED
F
Display
1 BOILER CONTROLS
Summary of Contents for Classic M3050
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