Operating Modes - salmson SIRIUX Série Manuel D'installation Et Mise En Service

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6.2 Function of the pump
There is a control module (Fig. 1a, item 1) in axial design on the motor housing,
which controls the differential pressure of the pump to a setpoint within the
control range. Depending on the control mode, the differential pressure follows
different criteria. In all control modes, however, the pump adapts itself contin-
uously to the changing power requirements of the unit, which is the case espe-
cially when thermostatic valves, zone valves or mixers are used.
The main advantages of the electronic control are the following:
• Energy savings and hence reduction of the operating costs,
• Reduction of flow noises,
• Reduction of the number of differential pressure valves required.

6.2.1 Operating modes

The Siriux series can be operated in "Heating" or "Cooling/air-conditioning"
operating modes. The two operating modes are distinguished from one another
in terms of their tolerance for faults in the handling of fault signals that occur.
"Heating" operating mode:
Faults are handled in a tolerant fashion (as is normally the case), e.g. depending
on the type of fault, the pump does not indicate a fault until the same fault has
occurred repeatedly within a particular period. See Chapter 10.1 and flow dia-
gram - fault / warning signal during "HV operation".
"Cooling/air-conditioning" operating mode:
For all applications for which each fault (in the pump or the system) needs be
detected quickly (e.g. air-conditioning applications).
Each fault, with the exception of the E10 fault (blocking) is indicated immedi-
ately (< 2 sec.). In the event of blocking (E10), various restart attempts will be
carried out, which means that in such cases no fault signal will occur until after
a maximum of 40 sec.
See Chapter 10.2 and flow diagram - fault / warning signal during
"AC operation".
Both operating modes distinguish between faults and warnings. In the event of
a fault, the motor is switched off, the fault code is displayed on the monitor and
the fault is indicated by the red LED.
Faults always result in the activation of the SSM ("collective fault signal" via a
relay).
In the case of dual pump management (double pump or 2x single pumps), the
standby pump starts within the time period specified below following the
occurrence of the fault.
58 Pompes Salmson 01/2013