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Thermostatically controlled circulation pumps cycle on and off to maintain a user's chosen temperature and consume less energy than a continuously operating pump. By installing a thermostatically controlled pump just after the farthest fixture on the loop, cyclic pumping maintains ready hot water up to the last fixture on the loop instead of ...
A thermal immersion circulator comprises a circulator pump or motorized impeller to move the fluid, a heating element immersed in the fluid, an accurate temperature probe, and control circuitry which compares the measured temperature with the desired value and supplies power to the heater as required to stabilize the temperature.
The basic job of the controller is to turn the circulating pump on when there is heat available in the panels, moving the working fluid through the panels to the heat exchanger at the thermal store. Heat is available whenever the temperature of the solar panel is greater than the temperature of the water in the heat exchanger.
In these systems, individual radiators can be modulated. Alternatively, a number of loops with several radiators can be installed, the flow in each loop or zone controlled by a zone valve connected to a thermostat. In most water systems, the water is circulated by means of one or more circulator pumps. This is in marked contrast to steam ...
By using a double pump system together with variable and automatic control, the pump is able to decrease its energy consumption while increasing efficiency and reliability. [7] Using the pump's variable controls allows the pump to base its amount of energy consumption on how much it is actually performing, cutting down on usage during non-peak ...
Simple mechanical and control design ("SPST thermostats") Redundancy: If one zone pump fails, the others can remain working; Far superior method of linking multiple heat sources. Such as gas and solid fuel in one system. Disadvantages: Higher initial installation cost. Circulator pumps cost more than zone valves; Higher power consumption.
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