pump units and controls

- IVAR.SOLAR K pump solar units

• IVAR.SOLAR K2 - dual-pipe pump solar unit with electronic solar pump, safety valve, flow meter, pressure gauge, check valve, thermometers and insulation, terminated with 3/4" female thread
• the IVAR.SOLAR control unit cannot be installed into the insulation of the pump group, only on the wall
• IVAR.SOLAR K1 - single-pipe pump solar unit with electronic solar pump, safety valve, flow meter, pressure gauge, check valve, thermometers and insulation, terminated with 3/4" female thread

Note: For connecting ø 22 or ø 18 mm piping, we recommend using the IVAR.2544 compression fitting.

 - Solar system controllers 

• digital controller for solar systems with backlit display
• Czech menu and commissioning wizard
• option to set the switching differential, cooling-back function,
  collector safety shutdown, option to use special functions for solar
  collectors and other functions - see the manual for individual controller types
• IVAR.ISTDC - 230 V output relay for controlling the circulation pump with the option
  of using a 0-10 V or PWM signal, including 2 Pt1000 temperature sensors,
  9 preprogrammed hydraulic schemes
• IVAR.IMTDC - 2x 230 V output relay for controlling the circulation pump or 3-way
  switching valve, including 3 Pt1000 temperature sensors, 25 preprogrammed
  hydraulic schemes
• IVAR.ILTDC - 3x 230 V output relay for controlling the circulation pump or 3-way
  switching valve and an additional heat source, including 4 Pt1000
  temperature sensors, 42 preprogrammed hydraulic schemes

Frequently Asked Questions

• What does a pump solar unit do? It ensures the circulation of heat transfer fluid between the collector and the storage tank, containing a pump, shut-off and safety elements, and measuring instruments (thermometer, flow meter) in one compact block.
• Is a separate controller needed, or is the unit sufficient without one? A unit without a controller requires a separate controller (e.g. IVAR.SOLAR ILTDC/ISTDC/IMTDC), which controls the pump switching according to the temperature difference between the collector and the storage tank.
• What is the difference between the ILTDC, ISTDC and IMTDC controllers? They differ in the number of controlled circuits and the range of functions (e.g. control of one or several storage tanks, additional functions such as pool heating); the specific range of functions is stated for each model.
• What is the sensor on the pipe/in the well used for? It measures the temperature of the heat transfer fluid in the collector or storage tank and sends a signal to the controller, which switches the pump accordingly.