Bosch SSB1000 SA, Руководство пользователя

Страница: 44 / 84

6720892984 (2019/02) US SSB
44 | System test
7 .2 .3 Stopping the test
Test OK:
The test mode is stopped when the high limit sensor of the duplex supply
sensor detects the
MAX_TEMP_ERROR
. The
MAX_TEMP_ERROR
is
stored in the boiler error history of the module,
The touchscreen shows the highest temperature of the
T_Supply
sensor
after the physical high limit test has been activated.
Test stopped by operator: When the test is aborted by the operator the
test mode is cleared and the override parameters are restored.
Timeout: When there is no error after 5 minutes the test stops
automatically. In this case the blocking error “
HIGH_LIMIT_FAIL
” is
active for 30 seconds.
7 .2 .4
Monitoring of attempts
The amount of test attempts is limited to 5 within 24hrs.
When the attempts counter > 5 the warning “high limit test wait time
active” is displayed for the module.
After 24hrs the high limit test attempts are cleared and the warning is
removed.
7 .2 .5
Limitations
The sensor temperature high limit test remains active during this test
mode. The setpoint for triggering the
MAX_TEMP_ERROR
lockout on
the sensor temperature is set to 115°C – 3°C hysteresis. When the
Safety Limit switch does not open during this test the sensor temperature
check stops the burner when the temperature increases to over this
setpoint. The error codes for both the Safety Limit switch and the sensor
temperature check are locking code 15,
MAX_TEMP_ERROR
.
When the physical high limit test is over the settings that were overruled
are restored. When the test failed the exchanger flowrate function is
still active and expects the actual flowrate to be over the minimum CH
flowrate. When this isn’t true after the testing period the
LOWEX_FLOW_
PROTECTION
error will be stored after the
HIGH_LIMIT_FAIL
error is
cleared.
7 .3 LWCO Error evaluated at Boiler level
To activate this modality set via Labvision the following parameter in the
Managing boards (Boiler X M1):
Prog. Input LWCO1: LWCO1 input (Boiler Level)
If the LWCO Error occurs in Boiler X, in case of demand request the
whole Boiler X will not start.
The Next 1 will be then called.
M1
LWCO Error!!
LWCO BOILER
M2 M3
BOILER 1 [M1]
CASCADE [M1]
M1
LWCO Error!!
LWCO BOILER
M2 M3
BOILER 2 [M1]
M1
LWCO Error!!
Input ignored!
LWCO BOILER
LWCO
BURNER
M2 M3
BOILER 3 [M1]
7 .4 System test in cascades with air damper
To enable system test a demand must be generated on the cascade
controller.
This is handled by the PB and needed because the air damper must be
opened by the cascade controller before a burner can start.