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Operation
6720813171 (2016/05) 33
“Chimney sweep” button
The “Chimney sweep” button ([3] is used to put the boiler into flue gas
test, service or manual operation mode.
The flue gas test enables the boiler to be run in full-load operation
manually for a short period. See table 10, “Flue gas test”, page 34.
The service mode enables the boiler to be run in part-load operation
manually for a short period. Measurements and settings are carried out
on the boiler during service mode. ( table 11, “Service mode”,
page 34).
Manual operation mode enables the boiler to be operated manually for a
long period. The boiler is switched to manual mode when the control
system has not been installed yet or is out of order ( table 12, “Manual
operation”, page 35).
A maximum heating water temperature in accordance with the setting of
the “Maximum heating water temperature” dial [8] on the BC 10 basic
controller applies during chimney sweep, service and manual operation.
“Service” button
The “Service” button [4] is used to display the current CH flow
temperature, the current system pressure etc. Also see table 22, “BC10
Display readings”, page 53, table 23, “BC10 Display settings”, page 54
and table 24, “BC10 Display codes”, page 54.
Service Tool connection
This service connection is for Worcester service engineers only.
“Burner” (On/Off) LED
The “Burner” (On/Off) LED ( fig. 69, [6]) lights up when the burner of
the boiler is active and it is extinguished when the burner is switched off.
The “Burner” (On/Off) LED indicates the burner status.
“Heat demand” LED
The “Heat demand”LED ( fig. 69, [7]) lights up when the control
system has made a heat demand and it is extinguished when this heat
demand is no longer required.
Maximum CH (boiler) flow temperature dial
The maximum CH (boiler) flow temperature ( fig. 69, [8]) is used to
set the upper CH (boiler) flow temperature limit. The unit is °C.
Display
The heating system display values, display settings and display codes
can be read out from the display ( fig. 69, [9]). If a fault occurs the
display will immediately show the accompanying fault code. The fault
code display will flash if a locking fault is detected.
“DHW mode” LED
The “DHW mode” LED ( fig. 69, [10]) lights up when a DHW request
has occurred and it is extinguished when this DHW request is no longer
required.
DHW temperature dial (Only functional when used in conjunction
with Bosch controllers)
The DHW temperature dial ( fig. 69, [11]) is used to select the
required temperature of the hot water in the hot water cylinder.
The unit is °C ( table 18, page 44).
9.2 BC10 control operating instructions
You can navigate through the menu structure of the boiler on the BC10
using the “Reset” button, the “Chimney sweep” button, the “Service
button” ( fig. 69, items 2, 3 and 4) and the display ( fig. 69, [9])
using table 9 to table 13.
The menu structure consists of 5 menus:
Normal Operation menu
Flue Gas Test menu
Service Mode menu
Manual Operation menu
Settings menu.
WARNING:
Damage to the installation with underfloor heating: by
the floor being overheated.
Limit the maximum CH flow temperature using the
“Maximum CH flow temperature” dial [8] to the
maximum flow temperature of the floor heating
circuit (usually maximum 40 °C).
WARNING:
Damage to the installation due to frost while manual
operation is switched on. After a power failure or after
switching off the supply voltage, the heating system may
freeze since manual operation is no longer active then.
Start manual operation after switching on the heating
system, so that the system is permanently in
operation (especially if there is a risk of freezing).
LED Status Explanation
On Burner
operational
Boiler water is being heated.
Off Burner off The CH (boiler) flow temperature has
reached the set temperature or there is no
heat demanded.
Table 8 Meanings of “Burner” (On/Off) LED indications
Normal operation menu
Step 1 [\/2/4| Display value. Currently measured CH flow temperature in °C. Also see section 14.2, page 53.
Step 2 Continue in Normal operation menu? Yes: step 3
No: step 1
Step 3 Press the e button.
Step 4 [p/1.6| Display value. Currently measured system pressure in bar. Also see section 14.2, page 53.
Step 5 Press the e button.
Step 6 [-/h/\| Random display code. In this case: Operating phase: Boiler in heating mode. Also see section 14.3, page 54.
Step 7 Have at least 5 seconds passed without a button being pressed and/or has the mains voltage been interrupted? Yes: step 1
No: step 8
Step 8 Press the e button. step 1
Table 9 Normal operation
33


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