Siemens Synco 700 Basic Documentation

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Building Technologies Modular Heating Controller RMH760B CE1P3133en
HVAC Products 8 Main controller and primary controller 05.02.2007
8.5.4 Heat demand transformers
The heat demand transformers described in chapter 7 “Heat demand and heat re-
quests”.
8.6 Mixing valve control
8.6.1 General
The heat output for mixing valve control can be reduced by functions of higher priority
(e.g. limitation of the return temperature) or by functions of other plants (boiler, DHW
heating) via load control.
The following mixing valve settings are valid for both 3-position and DC 0…10 V actua-
tors.
Main menu > Commissioning > Settings > … or
Main menu > Settings > Main controller > Mixing circuit controller
Main menu > Settings > Primary controller > Mixing circuit controller
Operating line Range Factory setting
Actuator run time 1…600 s 150 s
P-band Xp 1…100 K 50 K
Integral action time Tn 0…600 s 60 s
Locking signal gain 0…200 % 100%
• For more detailed information about mixing valve control and its settings, refer to
section
5.7 “Mixing valve control”
• Locking signal gain is used to preselect to what degree the primary controller shall
respond to signals received from load control
8.6.2 Load control
Load control signals from a heat source can have an impact on the primary controller:
A load reduction can be triggered by one of the following functions:
• Protective boiler startup
• Minimum limitation of the boiler return temperature
The primary controller does not respond to locking signals triggered by DHW heating.
From the consumer’s point of view, a load increase can be effected in the form of pump
and / or mixing valve overrun. In that case, the load is only maintained.
8.7 Setpoint increase
Typically, a mixing valve requires a setpoint increase, enabling it to compensate for
boiler temperature variations. With system pumps, this setpoint increase is not a basic
requirement for compensating boiler temperature variations. However, in the case of
long pipes between boiler and consumers, heat losses on the way to the consumers
can occur so that a setpoint increase can be desirable in these situations also.
Main menu > Commissioning > Settings > …
Main menu > Settings > Main controller > Main controller
Operating line Range Factory setting
Setpoint increase
0…50 K 0 K
Load control
Note
Load reduction
Load increase
Settings
Main controller

Siemens Synco 700 Specifications

General

Brand	Siemens
Model	Synco 700
Category	Controller
Language	English