8
FAMILY CX
3.18 Circulator
Circulator residual discharge head
The boilers is equipped with an already hydraulically and electrically connect-
ed circulator, whose useful available performance is indicated in the graph.
The modulation is managed by the board through the DUTY CYCLE PUMP
- access level SERVICE.
The circulator is factory set with discharge head of 6 meters.
The boiler is equipped with an anti-blocking system which starts up an opera-
tion cycle after every 24 hours of stop, with the mode selector in any position.
b
The "anti-locking" function is only activated when the boiler is electrically
powered.
a
It is strictly forbidden to operate the circulator without water.
Where there is the need to use a diff erent curve, the desired level can be
selected on the circulator.
The main characteristics and how to set the desired operation are described
below.
3.18.1
User interface
Note:
The user interface consists of a key
(A)
, a red/green LED
(B)
and four
yellow LED
(C)
set in a line.
The user interface allows to view the operating performance (operating status
and alarm status) and set the operating mode of the circulator.
The performance, indicated by LEDs
(B)
and
(C)
are always visible during
the normal operation of the circulator, while the settings are made by press-
ing button
(A)
.
3.18.2 Indication of the operating status
When the circulator is operating, LED
(B)
is green. The four yellow LEDs
(C)
indicate the consumption of electric power
(P1)
as shown in the following table
LED status
Status
CIRCULATOR
Consumption
in % of
P1 MAX (*)
Green LED on +
1 yellow LED on
Minimum operation
0~25
Green LED on +
2 yellow LEDs on
Minimum-medium
operation
25~50
Green LED on +
3 yellow LEDs on
Medium-maximum
operation
50~75
Green LED on +
4 yellow LEDs on
Maximum operation
100
(*) For the output (P1) absorbed by the circulator, refer to that indicated in
the “Technical Data” table.
3.18.3 Indication of the alarm status
If the circulator has detected one or more alarms the bi-colour LED
(B)
is
red. The four yellow LEDs
(C)
indicate the type of alarm as shown in the
following table.
LED status
ALARM
description
Status
CIRCULATOR
Possible
REMEDY
Red LED
on +
1 Yellow LED
on (LED 5)
The crankshaft
is blocked
Start attempt
every 1.5
seconds
Wait or unblock
the crankshaft
Red LED
on +
1 yellow LED
on (LED 4)
Low input
voltage
Warning only.
The circulator
continues to
operate
Check the
input voltage
Red LED
on +
1 yellow LED
on (LED 3)
Electrical power
supply failure or
circulator fault
The circulator
has stopped
Check the
electrical supply
or replace the
circulator
b
If there are multiple alarms, the circulator displays the highest priority
alarm only.
3.14 Filling the heating system and eliminating air
(Fig. 19)
Note:
When eliminating air form the boiler using the de-aeration tap
(A)
the
siphon fi lls; make sure that the level does not exceed the limit shown in the
fi gure, eventually closing the de-aeration tap
(A)
.
Note:
even if the boiler is fi tted with a semi-automatic fi lling device, the
fi rst fi lling operation must be carried out by turning the fi ller tap
(B)
with the
boiler OFF.
Note:
each time the boiler is powered up, the
automatic venting cycle
is
carried out
Note:
the presence of a water alarm (40, 41 or 42) does not allow the
venting cycle to be carried out. The presence of a domestic hot water
request during the venting cycle interrupts the venting cycle.
Once the hydraulic connections have been made, fi ll the heating system
as follows:
- Set the boiler to OFF
- Slowly open the de-aeration tap
(A)
and the system fi lling tap
(outside
the boiler)
- After about 1 minute, close the de-aeration tap
(A)
- Wait for the pressure to increase: check that it reaches 1-1.5 bar; then
close the system fi lling tap
(B)
.
Note:
if the mains pressure is less than 1 bar, keep the system fi lling tap
(B)
open during the venting cycle and close it once it has fi nished.
- To start the vent cycle shut of the electrical power for a few seconds;
connect the power again leaving the boiler OFF. Check that the gas tap
is closed.
- At the end of the cycle, if the circuit pressure has dropped, open the
fi lling tap
(B)
again to bring the pressure back up to recommended levels
(1-1.5 bar)
The boiler is ready after the vent cycle.
- Remove any air in the domestic system (radiators, zone manifolds, etc.)
using the bleed valves.
- Once again check that the system pressure is correct (ideally 1-1.5bar)
and restore the levels if necessary.
- If air is noticed when operating, repeat the vent cycle.
- Once the operations are fi nished, open the gas tap and ignite the boiler.
At this point it is possible to carry out any heat request.
3.15 Draining the heating system (Fig. 19)
Before draining, set the boiler to OFF and shut off the electrical supply
setting the system's main switch to “off ”.
- Close the heating system's taps (if present).
- Open the de-aeration tap
(A)
- Connect a pipe to the system discharge valve
(C)
, then manually loosen
it to let the water fl ow out.
- Once the operations are fi nished, remove the pipe from the system
discharge valve and close the system discharge taps
(C)
and de-
aeration
(A)
taps again.
3.16 Emptying the domestic hot water circuit
Whenever there is risk of frost, the domestic hot water system must be
emptied in the following way:
- turn off the main water supply tap
- turn on all the hot and cold water taps
- drain the lowest points.
3.17 Condensate siphon (Fig. 19)
When the boiler is fi rst started the siphon for collecting the condensate is
empty.
When eliminating air form the siphon fi lls.
- Slowly open the de-aeration tap
(A)
and leave it open until the amount of
water contained in the siphon reaches the ledge.
- Close the de-aeration tap
(A)
- Check that there are no leaks from the SRD device connection zone and
that the device allows the liquid to run off correctly.
- Check that the system pressure has not dropped below 1 bar. If
necessary, fi ll the system.
Repeat this operation during maintenance work.
CHECK THAT THE CONDENSATE DRAIN OUTLET SIPHON CONTAINS
WATER, IF IT WAS NOT FILLED PROCEED AS DESCRIBED ABOVE.
