BurnPell RControl EM890, User Manual

Page: 39 / 46

39
16. Alarm descriptions
16.1. BOILER MAX. TEMPERATURE
EXCEEDING
Protection against boiler overheating is done
in 2 steps. In the first step, after
exceeding
Boiler cooling off temperature , the controller
tries to reduce boiler temperature by
dropping excess of heat to the HW silo and
by opening mixer servomotors (only when
Mixer service = activated CH ). If
temperature measured by HW sensor
exceeds value
Max. temp. of HW then HW
pump is deactivated, what is done to protect
users against scalding. If boiler temperature
decreases, then the controller returns to
normal operation. If the temperature will still
increase (reaches 95 degrees C) then
constant alarm will be activated of boiler
overheating joined with sound signal.
The alarm can be deleted by pressing
„TOUCH and PLAY” button or activating and
deactivating power to the controller.
Attention: locating temperature
sensor outside water coat of boiler
i.e. on exhaust pipe is not
beneficial, because it may cause
delay
in detecting boiler
overheating state!
Pic. 28 Alarm of boiler overheating view.
16.2. FEEDER MAX. TEMPERATURE
EXCEEDING
Alarm appears after exceeding feeder
temperature above service parameter:
MENU
→
Service settings
→
Burner
settings
→
Max. feeder temperature
If the feeder temperature increases above
this value the controller will begin burning off
procedure.
Alarm is deleted automatically after feeder
temperature decrease by 10
°
C.
Function which protects against
back fire does not work when
feeder sensor is disconnected or
damaged.
Function which protects against
back fire does not work when The
controller has no electrical power.
The controller can not be used as
sole protection of boiler against
back fire. Additional protecting
automatics is to be used.
16.3. BOILER TEMPERATURE SENSOR
FAILURE
Alarm appears by boiler sensor damage and
by exceeding measuring scope of this sensor.
When alarm appears the burner is
deactivated. Deleting is done by pressing
TOUCH and PLAY button or by deactivating
and activating the controller. The sensor is to
be checked and replaced if necessary.
Checking the temperature sensor is
described in point 12.9.
Pic. 29 Alarm view of „Boiler temperature sensor
damage”.
16.4. FEEDER TEMPERATURE SENSOR
FAILURE
Alarm appears when feeder sensor is
damaged or by exceeding measuring scope
of this sensor. After alarm the boiler is burnt
off.
Deleting is done by pressing TOUCH and
PLAY button or by deactivating and activating
electrical power to the controller.