[TRNSYS-users] HELP: 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.

[David BRADLEY]

Veekay,
   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
>
> Veekay
> India
>
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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 at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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