2
Concord CXSD -
User's Guide
electrically isolate the boiler.
WARNING
.
This appliance
MUST
be efficiently earthed.
This appliance must not be subject to incorrect use:
It is
ESSENTIAL
that the instructions in this booklet
are strictly followed, for safe, economical operation
of the boiler.
The
CXSD
incorporates an advanced microprocessor based
control system which operates all electrical functions of the
boiler including automatic ignition, flame detection,
thermostatic control, and high/low burner operation. In
addition, the microprocessor also has onboard
commissioning and servicing instructions and a fault
diagnosis programme.
ON / STANDBY [1/0] BUTTON
Turns the boiler ON and to STANDBY.
When this switch is in the STANDBY position the display will
show :-
On initial start up the boiler will indicate the hardware and
software code, the boiler type, and indicate if the boiler is ON
or at STANDBY.
To switch the boiler ON press the On/Standby [1/0] button.
The display will show :-
This display will be retained for 5 seconds before the
information screens are displayed.
INFORMATION SCREENS
If the boiler is at STANDBY the rotating information screens
will not be in evidence.
See Frame 6 for details on information screens.
2 FEATURES OF THE CONTROL SYSTEM
In addition to the operational characteristics described above,
the control system incorporates the following features
accessible to the user or service engineer:
ADJUSTABLE BOILER TEMPERATURE CONTROL
This is factory preset at 85
o
C but may be adjusted by the user
between 60 and 85
o
C.
PROGRAMMER TIMER
A maximum of 3 time periods per day can be programmed in
to the boiler.
Note
.
This is a boiler timer only and does not replace a
conventional system programmer serving more than one
heating zone.
OUTSIDE SENSOR (Optional extra)
If the optional outside sensor is fitted, the control system will
recognise this and automatically regulate the boiler flow
temperature with respect to changes in the external
temperature. If the sensor is fitted, an extra status information
screen will appear stating whether the device has been
activated or not (i.e. Sensor on/off).
COMMISSIONING INSTRUCTIONS
These are provided to assist the installer to commission the
boiler.
1 THE CXSD CONTROL SYSTEM
The Gas Safety (Installation and Use)
Regulations 1994, amendments 1996 or rules
in force
impose certain statutory obligations on gas
users. This appliance must be installed by a CORGI
registered installer.
WARNING
.
The ON/STANDBY [1/0] button does
NOT
Display
Up / down buttons
On / standby button
CAUTION.
To avoid the possibility of injury during the use or cleaning of this
appliance care should be taken when handling edges of sheet steel components.
