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Type 5 D Boiler Controller

Type 5 D Boiler Controller
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T 0500 EN Type 5 D Boiler Controller Self-operated Regulators Application Flow temperature control in hot water boilers using solid fuels Horizontal or vertical installation The controllers are tested according to DIN EN 14597 for plants according to DIN EN 12828. Version The regulators operate according to the liquid expansion principle. Any temperature changes at the thermostat result in a proportional change in lever travel. The lever causes the supply air damper at the boiler to close, reducing the energy supply. The boiler controllers consist of a thermostat, set point adjustment knob, actuating lever and chain. Principle of operation (Fig. 2) The thermowell contains the liquid-filled thermostat (6), which senses the water supply temperature in the boiler. A pin (5) fastened to the bottom of the metal bellows (4) projects out of the thermostat and is fixed inside the knob (1) used to adjust the temperature. The system consisting of the thermostat and the pin is pressed by the spring (3) against a bearing in the knob. This allows the set point to be adjusted. The thermostat is connected to a pivot joint (2), to which the actuating lever (8) to control the damper position is fastened. The force of the spring (3) is calculated such that the weight of the control damper is balanced and does not cause a change in the boiler. The spring also acts as a safeguard against excess temperatures. When the flow temperature rises, the liquid in the temperature sensor (6) expands and pushes the thermostat down since the pin (5) is fixed inside the knob (1). The pivot joint moves and turns the actuating lever axially. The chain (9) causes the damper to close accordingly. In this way, the energy supplied to the boiler is reduced and the boiler temperature falls. If the flow temperature is reduced, the damper opens according to the set point adjustment. The temperature set point is changed by turning the set point adjustment knob. This causes the thermostat and pin to move axially. For example, a higher temperature set point causes the damper to open until the adjusted set point is reached. Fig. 1: Type 5 D Boiler Controller Pivot joint Spring to balance the weight of the damper Metal bellows Temperature sensor filled with expanding liquid Thermowell Actuating lever Adjustment knob for set point adjustment Fig. 2: Sectional drawing of Type 5 D SAMSON AKTIENGESELLSCHAFT · Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 · samson@samson.de · www.samson.de

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Boiler controller Fig. 3: Functional drawing of Type 5 D Boiler Controller Table 1: Technical data · All pressure stated as gauge pressure Type 5 D Boiler Controller Weight, approx. 0.6 kg Fig. 4: Dimensions of Type 5 D Functioning principle according to DIN EN 14597 Connecting thread Excess temperature safeguard 50 °C above the adjusted set point Max. perm. pressure at sensor Transfer coefficient Installation Suitable for horizontal or vertical installation The red inscription on the set point adjustment knob apply when the controller is installed horizontally and the white inscription...

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