Stroco 15.00 M, Service Instructions Manual

Page: 14 / 38

TECHNICAL SPECIFICATIONS
PAGE 14
Pre-ventilation period: At first start approx. 60 sec.
At restart approx. 10 sec.
Post-ventilation period:
approx. 120 sec.
Under voltage:
At 24V system:
Connection or disconnection approx. 20.5/22 VDC
At 12V system:
Connection or disconnection approx. 10.5/11.5 VDC
Over voltage:
At 24V system:
Connection or disconnection approx. 30/29.5 VDC
At 12V system:
Connection or disconnection approx. 15/14.5 VDC
Safety time:
Max. 15 sec.
Contact load:
Max. 10 Amp (cabin fan pin B5)
Electrical connection:
15 pin AMP connector (A in electrical diagram)
Explanation of terminology
Low temperature boiler supply water
At low supply water temperatures, the control thermostat cuts out at approx. 60°C and cuts in at
approx. 55°C. This is referred to as the low range in this text.
Please note: Connect cable B2 if the low temperature range is desired.
High temperature boiler supply water
At high supply water temperatures, the control thermostat cuts out at approx. 80°C and cuts in at
approx. 73°C. This is referred to as the high range in this text. This is the temperature range most
commonly used.
Please note: Do not connect cable B2 if the high temperature range is desired.
Overheating protection (max. temperature)
Excessive heating of the boiler water is prevented by means of a circuit breaker in the overtempe-
rature thermostat, which is activated at approx. 110°C. If the circuit is tripped, disconnecting the
electrical system, it must be reactivated manually by pressing the black button on the thermostat.
The system does not restart automatically, even if the water has cooled down again.
Safety period in case of flame failure
If no flame is established, the safety relay switches on the ignition to attempt a restart. If there is still
no flame within the relay’s safety period of 15 seconds, the relay cuts out and the systems starts to
post-ventilate. If the safety relay cuts out, the error lamp comes on.
Pre-ventilation
The heater starts up with a pre-ventilation period of 60 seconds. This period is reduced to 10 seconds
once the heater is in regular operation where start and stop is controlled by the thermostat.