3
Concord CXS 40-120 -
User's
Guide
CONCORD CXS 100 - 120 models only
TO SHUT DOWN THE BOILER
For short periods
Turn the boiler off at the time clock or system controls. Wait 6
min. and then turn the boiler control thermostat knob (1) to
OFF. Note the frost warning below.
For long periods
Turn the boiler off at the time clock or system controls. Wait for
6 min. and then turn the boiler control thermostat knob (1) to
OFF. Note the frost warning below.
TO RELIGHT THE BOILER
After short periods
Switch on the time switch or system controls and turn boiler
thermostat knob (1) to the required setting. The boiler will light
providing the external controls are calling for heat.
After long periods
Follow the lighting instructions above. Refill the system if it has
been drained.
FROST WARNING
If frost is likely, leave the boiler thermostat at position 6 and do
not turn off the gas cock.Tthis will enable the built -in frost
thermostat to protect the boiler. Note that this may not protect
remote parts of the system, in which case a seperate frost
thermostat should be fitted or the system drained and the
boiler shut down for as for long periods.
1.
Check that the boiler thermostat knob (1) on the control
box (2) is OFF.
2
. Ensure that the mains gas inlet cock (3) is open (groove
in the square head in line with the gas pipe).
3.
Press in and release the overheat thermostat button (4).
4.
Switch on the electrical supply to the boiler.
5.
Ensure that all system controls (time switch, system
controls etc.) are calling for heat.
6.
Turn the boiler thermostat knob (1) to position 6.
7
. The boiler will light at Low rate and the Boiler-on light (5)
will be illuminated. If it does not light the Lockout light
(6) will be illuminated. Press in and release the Lockout
button (7). The controls will reset and attempt to relight.
8.
The burner will remain at Low rate for about 3 minutes
before going to High rate.
9.
Check all connections for gas soundness, using leak
detection fluid.
10.
Set the boiler thermostat knob and the system controls
to the required settings.
11.
Turn off the electrical supply to the boiler.
TO LIGHT THE BOILER
9
3
3
4
2
9
LEGEND
1.
Thermostat knob
2.
Control box
3.
Mains inlet gas cock
4.
Overheat thermostat
reset button
5.
Boiler on light
6.
Lockout light
7.
Lockout reset button
8.
Overheat light
9.
LH Gas control valve
10.
RH Gas control valve
10
10
7
6
5
1
8
