II. Description of the device
ST–550zPID temperature regulator is intended to control CH boiler with a screw feeder. Due to its
advanced software it offers a range of functions:
• Control of the fan and the feeder
• Control of CH pump
• Control of DHW pump
• Control of two additional pumps
• Control of two mixing valves actuators
• Possibility of connecting a room regulator with traditional or RS communication
• Possibility of connecting ST-65 GSM module
• Built-in Ethernet module enabling the user to view certain parameters and control
certain functions via the Internet
• Possibility of controlling two valves via additional modules (e.g. ST-431N)
Controller equipment:
• CH temperature sensor
• Feeder temperature sensor (protection)
• Floor temperature sensor
• DHW sensor
• Temperature protection (bimetallic mini sensor)
• Supply cable
• Pump supply cables
• Hall-sensor of the fan
• Feeder flap limit switch
III. Installation
The controller should be installed by a qualified person.
WARNING
Risk of fatal electric shock from touching live connections. Before working on the controller
switch off the power supply and prevent it from being accidentally switched on.
WARNING
Incorrect connection of the wires may lead to controller damage!
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