There are two ways that Type2 can be used. Most commonly it is used as a differential controller such that it turns on when the difference between two temperatures exceeds a certain amount and then stays on until the difference between those temperatures falls to a different amount. You'd use this in a solar thermal system when you want to turn on the collector if the collector temperature exceeds the storage tank temperature by (for example) 10C no matter what the temperature of the storage tank. This was the method that Alastair correctly suggested.
You can also use Type2 like a more traditional thermostat in which case you typically want to turn on a device when a monitored temperature exceeds (or falls below) a certain set point value. There are proformas for Type2 set up to do this. They are located in Controllers: Aquastat: Heating Mode and Controllers: Aquastat: Cooling Mode. Alternatively you can use Type108 which, while it allows for more than one stage of control, can also be used as a simple thermostat in either heating or cooling mode.
kind regards,
David
On 12/16/2015 12:44, Vinod wrote:
Please help me in TRNSYS 17: How to connect a thermostat switch (Type 2b) to switch ON a pump at a particular temperature range else keep the pump OFF.
My purpose is to run the pump to discharge after achieving a particular temperature.
Thanks
VeekayIndia
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-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com