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Boiler Controller TROVIS 5474

Boiler Controller TROVIS 5474
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Application Weather-sensitive control of up to two boilers, designed for single-stage, two-stage or also modulating operating mode. Communication with a control system via the RS 232 interface. The boiler controller TROVIS 5474 works according to singlestage, two-stage or modulating operating mode and is used for weather-sensitive control or for fixed set point control of boiler installations including up to two boilers. This controller is able to control higher flow temperatures than stipulated by its own boiler characteristic when demanded so by downstream controllers. The return temperature may be increased either separately for each boiler or for all of them together. Single-boiler installations allow the connection of an additional heating loop for domestic hot water. Special features: • Fixed or variable boiler operation • Return temperature increase via pump control for each individual boiler • Boiler start-up control • Minimum switch-on and switch-off time per boiler • Reduction of excessive boiler temperature through forced charging of the drinking water storage tank • Safety shut-down in case of excessive boiler temperature • Automatic sequence reversal according to operating hours, outdoor temperature or in case of malfunction • Differential temperature control using variable weighting factors • Forced actuation of pumps • Connection to Modbus is possible • Interface RS 232 for communication with a modem • Interface for meter bus Version TROVIS 5474 (Fig. 1) ■ Boiler controller with RS 232 interface Fig. 1 ■ TROVIS 5474 Boiler Controller

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Inputs and outputs (Fig. 2) The inputs and outputs of the boiler controller are settled by the system code number. To determine the required temperatures, the following sensors are suited: Pt 100, Pt 1000, Ni 200, Ni 1000 and PTC sensors, also applicable in combination. The outdoor temperature can also be processed by a 0 to 10 V analog output. The controller has got two three-step signal outputs or analog outputs responsible for the increase of the return temperature. Six binary outputs control the boiler pump and the boiler stages. Two other binary outputs assigned to small heat outputs...

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Manual adjustment of the characteristic (Fig. 4) The boiler controller can be operated by adjustable boiler characteristic or by fixed flow temperature. In both cases, the flow temperature set point can be reduced during unoccupied periods. The boiler characteristic is determined by entering four arbitrary points (Fig. 4). These points are established at flow temperatures ty from 20 to 120 ° C and outdoor temperatures tA from - 20 to 50 ° C. The maximum and minimum flow temperature can be defined by limit values. Electrical connection and assembly The controller consists of the controller...

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Dimensions in mm Inputs Sensor inputs and binary inputs

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Analog output Analog input Common ground of analog inputs Outdoor temperature sensor Common ground of analog outputs Binary output Binary input Status point, boiler 1, 2 released Status point, boiler 1,2 Common ground Boiler 1,2 Boiler temperature sensor 1,2 AA AE AE_GND AF AO_GND BA BE BM_FK BM_K GND K K MBUS Connection for meter bus RuF Return temperature sensor RuFg Return temperature sensor, for the entire system SM_K Fault message, boiler SM_P Fault message, pump VFg Flow temperature sensor, for the entire system WWA Drinking water demand WWZ Forced charging of drinking water storage...

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AF Outdoor temperature sensor RL KF Boiler sensor 1, 2 RuFg Fig. 7 ■ System code number 5 SAMSON AG ■ MESS- UND REGELTECHNIK WeismullerstraBe 3 ■ 60314 Frankfurt am Main ■ Germany Phone: +49 69 4009-0 ■ Fax: +49 69 4009-1507 Internet: http://www.samson.de Return flow Return temperature sensor 1,2 Return temperature sensor, for the entire system Flow temperature sensor, for the entire system Flow

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