Thermo Technologies SMT 100 User Manual
Page 7
6
2.3.2 TWO PUMP CASCADE SYSTEM
In this configuration
will run when the tank temperature
is below the
set point TT, and Pump
will run (Pump
will switch off) when
rises
above TT.
1
Insert a link between “L” terminal of the PUMP relay and the common
terminal “C” of the AUX relay, (see cascade diagram).
2
Connect
and
(see cascade diagram)
3
Connect the mains supply to the terminals marked MAINS
4
Connect the earth to the pump.
Replace the “top” section of the control unit, and then fasten using the two
side fixing screws. The unit is now ready to be powered up.
When
< TC:
= OFF;
= OFF
When
> TC
: If
< TT::
= ON;
= OFF
and
-
>
If
> TT::
= OFF;
= ON