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ManualsBrandsDelta Electronics ManualsComputer equipmentA80
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Page 36
When this T2-T1 value exceeds the lock-out setting, the boiler will switch off and the following lock out
code will be shown at the display.
When these messages appear and/or the boiler will lock out, it means that there is not enough flow
over the boiler. In this case check the functioning of the pump.
The boiler has no built in water-flow switch. If there is the possible risk of a water-flow blockage of the
(external) heating system, the following pre-cautions can be taken to ensure a water flow over the boil-
er:
Separate the boiler circuit from the (external) heating circuit by using a low loss header or plate
heat exchanger.
When the boiler is not equipped with an internal (built in) water pressure switch, install a water pres-
sure switch externally, in series with the room thermostat.
During and after the commissioning of the boiler, the operation of the boiler pump must be checked,
before leaving the installation/Boiler room.
REMINDER: Always check the running of the pump before firing the boiler!
Display message H e a t e x c h a n g a t r i s k
9 9 9 , 5 h r s
Reason The max delta temperature T1-T2 has exceeded the blocking temperature more
than three times. Set in the parameters P2 CQ-P2 CV (∆T>P2 CV (binnen t=P2 CQ).
Display message F l o w R e t u r n d t f a u l t
F16 p u m p o n 9 9 9 , 5 h r s
Reason The max delta temperature T1-T2 has exceeded the blocking temperature.
Programmed at the parameters P2 CO, P2 CR untill P2CV.
1
2
3
S-CB 80 / 100
2
S-CB 60
S-CB 150/180
1
2
3
3
1
2
SCB120
1
3
Measure the gas pressure in the gas pipe at
the pressure nipple (3) of the gas safety
valve.
NOTE: SCREW 2 IS THE SMALL SCREW,
AS SHOWN IN THE DIAGRAMS.
FIRING THE BOILER Check the minimum gas pressure (20mbar) available at the connection
pipe of the boiler. Use the pressure nipple (3) of the gas valve for this measurement. The minimum gas
pressure for the boiler to operate properly under the correct load must be 20 mbar and/or current
regulations and not exceeding 30mbar
Decrease CO2
Increase CO2