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Siemens Building Technologies
HVAC Products
Temperature compensation at HEAT
The controller offers two type of temperature control mode at heat mode.
When SF04=0, the set-temperature at heat will be controlled by ST02;
When SF04=1, the set-temperature at heat will be controlled by ambient-
temperature (OT) ,ST05 and ST06 according to the following formula:
Set-temperature at HEAT =ST05+ST06 (ST05-OT)
The calculated temperature can be used for the control reference, but the
maximum date will not exceed ST14
Boiler
At heat mode, BOILER works as follows:
When OT＜ ST07, BOILER will run as a energy stage by the requirement of
temperature, but BOILER will be the last to get into running, the first to quite from
working.
When OT＞ ST07+ST08, BOILER function will be cancelled.
3 way valve/ daily hot water pump control
When SF10=0, DO7 will control the 3 way valve. Both the indoor side water pump
and 3 way valve will be turned on when running the daily hot water mode.
When SF10=1, DO7 will control the daily hot water pump. The indoor side water
pump is OFF, the daily hot water pump will be ON when running daily hot water
mode.
Alarm
the alert Produced namely output, the alert clearance namely stop exportation.
Control process
TURN ON process at HEAT
When operate TURN ON at heat mode, the controller will work as the following
process:
9.6.1.1 Start the indoor side water pump, 4 way valve;
9.6.1.2 With CN01 delay, start the outdoor side water pump;
9.6.1.3 With CM05 delay, and the water flow switch turned on, at the same time the
time data CM02 meeted, start one compressor.
9.6.1.4 With CM03 delay, and the time data CM02 meeted, start the other compressor if
has.
9.6.2 TURN OFF process at HEAT
■
When operate TURN OFF at heat mode, the controller will work as the following
process:
9.6.2.1 CM01 meeted, turn off one compressor;
9.6.2.2 With CM04 delay, CM01 meeted, turn off the other compressor if has;
SIEMENS Controller
18/28
HEAT PUMP controller
27.11.2006
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