Operation Manual

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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products QAA75.. / QAA78… / AVS37.. 23. August 2007
Display options
Heating to Comfort setpoint
Info level activated
Heating to Reduced setpoint
Programming activated
Heating to frost protection setpoint
Heating temporarily switched
off
ECO function active
Process running – please wait Holiday function active
Change battery Reference to heating circuit
Burner operating (only oil / gas boiler)
Maintenance / special
operation
Error messages
Display of all symbols and segments.
Selection of space heating mode
This setting is used to switch between the different
operating modes. The selection made is indicated by a
bar which appears below the respective symbol.
Automatic mode
Automatic mode controls the room temperature according to the time program.
Characteristics of automatic mode:
− Heating mode according to the time program
− Temperature setpoints according to the heating program "Comfort setpoint" or
"Reduced setpoint"
− Protective functions active
− Automatic summer / winter changeover (ECO functions)
Continuous operation
or
Continuous operation maintains the room temperature at the selected operating level.
Heating to Comfort setpoint
Heating to Reduced setpoint
Characteristics of continuous operation:
• Heating mode with no time program
• Protective functions active
• Automatic summer / winter changeover (ECO functions) and 24-hour heating limit
inactive in the case of continuous operation with Comfort setpoint
Protection
When using Protection mode, the heating system is off, but it remains protected against
frost (frost protection temperature) provided there is no power failure.
Characteristics of Protection:
• Heating off
• Temperature according to frost protection
Display
2358Z07
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