Types Of Primary Controller; Control Of Mixing Valve; Pump Control - Siemens Synco 700 Series Basic Documentation

Heat requests
Fault setting
primary controller
Building Technologies
HVAC Products
The heat requests can be received from other devices via bus. In addition, there are 3
binary inputs and 1 analog input for signalling heat requests.
9.3

Types of primary controller

If only a pump or twin pump is configured, the primary controller consists of system
pump control. If, in addition, a mixing valve is configured, the primary controller consists
of mixing circuit control plus pump or twin pump control.
Y1
B1
M1
B7
Primary controller type 1:
With mixing valve
B1 Flow temperature sensor (* = optional, for display only)
B7 Return temperature sensor (* = optional, for display only)
M1 System pump (can be a twin pump)
Y1 Mixing valve
Primary controller type 1 with mixing circuit can provide optional maximum limitation of
the return temperature while primary controller type 2 only controls a system pump
depending on demand.
The flow or return temperature sensor of primary controller type 2 can be used for
display purposes.
By configuring the outputs, it is defined whether a primary controller type 1 or type 2 is
used. Without configuration of a mixing valve, type 2 is automatically used. It is also
possible to define a flow temperature boost with the type 2 controller to compensate for
temperature losses in the case of long pipes.
9.3.1

Control of mixing valve

For control of the mixing valve, a 3-position or DC 0...10 V actuator can be used. The
selection is made by configuring the relevant output.
9.3.2

Pump control

Pump control offers a number of monitoring choices, no matter if it is a single or twin
pump.
For more detailed information about pump control and twin pumps, refer to section 5.8
"Pump control".
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Primary controller > Fault settings > Overload pump
Operating line
Fault acknowledgement
Fault acknowledgement B
Boiler sequence controller RMK770
9 Precontrol
B1*
M1
B7*
Primary controller type 2:
With system pump
Range
None / Acknowledge /
Acknowledge and reset
None / Acknowledge /
Acknowledge and reset
Factory setting
Acknowledge
Acknowledge
139/232
CE1P3132en
23.04.2009