Supplied By www.heating spares.co Tel. 0161 620 6677
BOILER SERVICE FUNCTIONS CDI, HIGHFLOW CDI & FS CDI REGULAR
8 716 115 748 (2009/09)
25
6.3
EXPLANATION OF SERVICE FUNCTIONS
6.3.1
FIRST SERVICE LEVEL
1.A MAX. OUTPUT (HEATING)
The heating output can be set to any level between
minimum rated heat output and maximum rated heat
output to limit it to the specific heat requirements.
The factory setting is maximum rated output, depending
on appliance type.
2.B MAX. FLOW TEMPERATURE
The maximum CH flow temperature can be set to
between 35 °C and 88 °C (factory setting). Even if the
CH flow temperature control is set higher, the setting
entered for
2.b
(Max. flow temperature) is not
exceeded.
2.C AIR PURGE MODE
The first time the appliance is switched on, a once-only
venting function is activated. The heating pump then
switches on and off at intervals. This sequence lasts
about 8 minutes.
The 2-digit display alternates between
and the CH
flow temperature.
The automatic vent must be opened and then closed
again once the venting sequence is complete.
•
If the venting function is set to “On” (with automatic
deactivation), the function is set to “Off” once the
sequence has been completed
2.F OPERATING MODE
There are 3 operating modes to choose from.
•
Normal mode
: the appliance operates according to
the commands received from the programmer. The
display shows
0
.
•
Minimal mode
: the appliance runs constantly at
minimum output.
The display shows
1
. The 2-digit display alternates
between the CH flow temperature and
. After
15 min the minimal mode changes to normal mode.
•
Maximum mode
: the appliance runs constantly at
maximum output.
The display shows
2
. The 2-digit display alternates
between the CH flow temperature and
. After
15 min the maximal mode changes to normal mode
3.B ANTI-CYCLE TIME
The anti-cycle time is factory set to 3 minutes.
The shortest possible anti-cycle time is 1 minute
(recommended for single-pipe and hot-air heating
systems).
If the setting 0 is entered, the anti-cycle time is inactive.
B
Enter the anti-cycle time on the commissioning record
enclosed with the appliance.
3.C ANTI-CYCLE FLOW TEMPERATURE DIFFERENTIAL
The switching difference is the permissible differential
from the specified CH flow temperature. It can be set in
increments of 1 K. The adjustment range is 0 to 30 K (is
factory set to 10 K). The minimum CH flow temperature
is 35 °C.
B
The switching difference setting should be entered on
the commissioning record supplied with the
appliance.
3.F BURNER OFF AFTER DHW DEMAND (HOT WATER)
(CDi COMBI & HIGHFLOW CDi ONLY)
The appliance is supplied with the hot water duration
set to one minute.
The hot water duration time specifies how long, after hot
water has been drawn, that the heating mode remains
disabled.
4.F SYPHON-FILL PROGRAMME
The syphon filling function ensures that the syphon trap
is filled when the appliance is first installed or shut down
for a long period. Flue gas is prevented from escaping
into the room that the appliance is installed.
The syphon filling function is activated when:
•
the appliance is switched on at the main switch
•
the burner has not been in operation for at least
48 hours
•
the appliance is switched from summer to winter
mode
Even if the heating output is limited, the
full rated heat output remains available
for hot water.
The venting function can be activated
manually after servicing.
Note: 1K =^ 1 °C.
If the syphon is not filled, flue gases can
escape!
B
Only deactivate the syphon filling
program in order to carry out service
work.
B
Always re-activate syphon filling
program once servicing is complete.
