Configuration Manual

Version Document
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001
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ccess V4.X Configuration manual
15 (56) 2018-07-11
Sequence Heating Cooling Start
Heating
Start
Cooling
Sequence name
Sequence-A 3 2 Off 0% 0% Heating
Sequence-B 1 1 0% 0% Exchanger
Sequence-C Off 2 0% 0% Cooling
Sequence-D Off Off 0% 0% Recirculation 1
Sequence-E Off Off 0% 0% Recirculation 2
Sequence-F Off Off 0% 0% Fan heating/cooling
Sequence-G 2 Off Off 0% 0% Heating 2
Sequence-H Off Off 0% 0% Cooling 2
Sequence-I Off Off 0% 0% Exchanger extract
Sequence-J Off Off 0% 0% Extra heating/cooling capacity
Configure: Configuration > Function Configuration > Function Activation> Sequence Configure
type > Heating (Heating 2)
Heating type:
 Water
 Electric
 Combi battery
 Condenser (DX)
Water heating
Control
When the unit is in running mode the heating valve is controlled by the analogue
output and digital output (“Sequence-A pump”) for pump control and/or signal
(“Sequence-A start”) for start heating.
Pump indication
A feedback from pump (“Feedback sequence-A”) can be used, “running indication
or alarm indication.
Frost protection temperature sensor
The heater return water temperature is measured using the analogue input (”Frost
protection sensor”). Low temperatures will generate an internal, proportional signal
that is used to force the heating valve open thereby preventing freeze-up of the
heater.
The internal signal will begin to rise as the frost protection temperature falls below
“Alarm limitation running mode” + “P-band running mode” in order to reach 100 %
output when the signal has fallen to “Alarm limitation running mode”.
Frost guard
When ”Internal signal” reaches 100 % or the digital input (”Defrost switch”) is
activated, the unit is shut down, the heating output is set to completely open mode
and an alarm is activated. The unit is restarted when the alarm has been
acknowledged and the temperature for the frost protection sensor has risen above
“Alarm limit frost” + “P-Band”.
The frost protection alarm limits is set in the Data & settings > Temperature control
> Heating and/or Heating 2.