Italtherm CITY BASIC - Draining System and Boiler Block Alarms

30

When it is necessary to drain the heang system, pro-
ceed as described here below:
f Connect a rubber pipe to the draining tap terminal 1 ;
f put the other end of the pipe in a suitable drain or
sink;
f open the draining tap by turning the nut 2 counter-
clockwise, using a suitable spanner;
f when the pressure is COMPLETELY drained, it's pos-
sible to open the radiators venng valves, to allow
the air inlet. The complete system drain is possible
only draining the liquid from the lowest point of the
system itself.
f when everything is over, close taps (turning the nut 2
clockwise) and air vents.
In the primary exchanger a certain quanty of
water of the heang system remains. If you want to remove the boiler from the wall, we advice
you to close with plugs the hydraulic inlet/outlet heang system connecons.
Alarms - boiler block
Following a malfuncon, the boiler can lock-up and show a parcular signalling, consisng of an alarm
code on the display and of the status of the RED light indicator (and eventually of the  and
the YELLOW ones). In the following table, all the alarm signals are listed, their most probable causes
and the suggested soluons.
Each alarm code is complete of the status of the RED light indicator:
= on; = blinking;
; . Some alarms are signalled with a combinaon of two or more lights,
in this case the light colours are explicitly reported close to the relevant status.
  

Signal Probable causes 
01
Boiler just installed
(air mixed to gas).
Retry the ignion several mes: turn the knob
on the unlock
posion
, wait the red light to turn o, then bring the knob
in the previous posion.
The ame has exn-
guished or it did not
ignite
Restore the boiler funcon by turning the knob
on the unlock
posion
, wait the red light to turn o, then bring the knob
in the previous posion.
In case of frequent blocks, verify the correct combuson, the
good state and the cleaning of the burner.
Incorrect
electrical power
supply
Ensure that the Live, Neutral and Earth connecons are correct and
ecient and in parcular that the Live and Neutral are not swapped
(see "Electrical diagram" on page 37).
Remark: The problem could also be caused by an incorrect distribuon of electricity on
the network (neutral unbalanced).