Safety Function; Burner Setting; Settings - Rotex A1 BG Installation And Maintenance Instructions Manual

7.2 Safety function

Fault shutdown and malfunction indicator
A locking fault shutdown takes place if:
– if a flame signal is present during pre-ventilation (remote light
monitoring - fault code 11),
– the speed of the burner blower deviates too much from the set
value (fault code 3),
– during the start (fuel release) a flame is not detected after
5 secs (safety time) and 4 additional failed start attempts,
– the flame fails 5x during continuous burner request (fault
code 5),
– the flow temperature reaches the value for safety temperature
limiting (fault code 1),
– the return temperature reaches the value for safety tempera-
ture limiting (fault code 1),
– inconsistencies arise when using a BurnerChipCard (BCC).
A locking fault can only be reset manually
(see chapter 10.4).
A temporary fault shutdown occurs if
– the flow temperature exceeds the set maximum boiler tem-
perature by more than 5 K (fault code 6),
– the flow or return temperature sensor does not provide a valid
value (short-circuit, interruption - fault code 12),
– the flow temperature exceeds the return temperature by more
than 35 K (fault code 17),
– the flow temperature rises too rapidly (fault code 19),
– the supply voltage is too low (fault code 32),
– the communication between the automatic firing and the con-
troller is interrupted for longer than 2 mins. (fault code 48).
When the above conditions are back in the normal
working range, a burner release is carried out automat-
ically.
A fault is displayed:
– by the red backlight in the display,
– by a clear text fault message with the fault code in the display
on the control section.
Unlocking burner: see chapter 10.4
If more than 5 faults are reset within a 15 minute period,
the fault code 10 is displayed. Another release in then
only possible after 15 mins.

7.3 Burner setting

DANGER OF EXPLOSION!
Escaping gas is a direct threat to human health and
safety. Even a few sparks can cause major explo-
sions.
Before working on gas carrying parts, always close
the main domestic gas stop valve.
If you can smell gas, air the room thoroughly.
Prevent generating sparks or flames (e.g. from a
naked flame, an electrical switch or mobile phone).
Only heating specialists authorised and trained by
the gas or power supply company should be
allowed to work on gas-conducting parts.
FA ROTEX A1 BGe - 02/2014
The burners of the ROTEX A1 can be equipped at the factory with
different blower types, which are operated at different speed set-
tings.
The following settings apply to the blower type
G1G 126 (see type plate on burner blower).
If the burner is fitted with a different blower type, the dif-
ferent facts are documented on an additional sheet.
If a different type of blower is used as a replacement,
the automatic firing must be adapted to suit this change
using BCC.
Before the settings are changed on the burner, check which
burner configuration is installed. The blower type can be read
off of the type plate of the blower (near the outlet flange on the
blower housing).
If changes have been made to the power settings of the burner
or if it has been converted to a different type of gas, this must
be logged in the operating manual and entered on the setting
type plate (fig. 3-1, item 23 and fig. 7-5).
The changeover must be provided with the date of implemen-
tation and the signature of the installer.
When changing to a different type of gas, you must apply a
suitable equipment sticker to the burner housing (see also
section 7.3.4).
Fig. 7-5 Settings type plate

7.3.1 Settings

The set value of the oxygen or carbon dioxide content
depends on the burner load. Intermediate values are
linearly interpolated.
7 x Gas burner
33