Table of Contents
Advertisement
I. Description
Temperature controller ST–450 zPID is intended for use with
central heating boilers equipped with feeding screw. It controls water
circulation pump, domestic hot water pump, floor heating pump,
circulation pump, blower (fan) and fuel feeder. It incorporates a valve
control module and can operate with two mixing valves (via additional
ST-61 modules), conventional (two-state) room controller or RS-port
communication, GSM module or Ethernet module.
The advantage of the controller is the ease of use. The user can change all
parameters using a pulser knob. Another advantage is a large and easy-to-
read display where the current boiler operation is shown.
Exemplary view of the main screen:
The ST-450zPID controller is a regulator with a continuous output signal
utilizing the PID regulation algorithm. In this type of controller the blow-in
power is calculated on the basis of the measurement of the temperature of the
boiler and the temperature of flue gas measured on the outlet of the boiler.
Operation of the fan proceeds on an ongoing basis and the blow-in power
depends directly than the measured boiler temperature, the temperature of flue
gas and the difference of these parameters from their preset values.
Stable maintenance of the set temperature without any unnecessary
adjustments and oscillations is the advantage of a regulator with PID.
When using this type of controller with a flue gas outlet sensor, savings in
fuel combustion may reach up to more than ten percent; The outlet water
temperature is very stable, which affects the longer life span of the exchanger
(boiler). Checking the temperature of flue gas at the outlet from the boiler
causes low emission of dusts and gases harmful for the environment. Thermal
energy from the flue gas is not wasted and released to the chimney, but used
for heating.
ST – 450 z PID
- 5 -
Advertisement
Table of Contents
