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TDC Solar Controls

Temperature difference controllers by SOREL: versatile and user-friendly. Thanks to the clear operator guidance, various types of solar systems can be operated intuitively – from small to complex.

stdc

STDC

“Small” Temperature Difference Controller for simple systems for 9 solar, storage and solid fuel boiler-systems

mtdc

MTDC

“Medium” Temperature Difference Controller for midsize systems for 25 basic systems with additional functions for unused relays

ltdc

LTDC

“Large” Temperature Difference Controller for complex systems for 42 basic systems with additional functions for unused relays

xtdc

XTDC

Xtra large for flexible controlling of complex solar thermal systems with up to 4 storages

mtdce

MTDC-E

Midsize Temperature Difference Controller for basic solar systems with electric backup heating up to 3kW.

ltdce

LTDC-E

Large Temperature Difference Controller for basic solar systems with electric backup heating up to 3kW and control of circulation pump.

airtdc

AIR TDC

Temperature Difference Controller for air collector systems.

drainset

DRAINSET

DrainSet for solar thermal Drain-Back systems.

pooltdc

POOL TDC M

Solar pool controller

pooltdc

POOL TDC M Plus

Solar pool controller with filter pump running time control

STDC MTDC LTDC XTDC MTDC-E LTDC-E
Sensor inputs PT1000 3 4 6 8 3 4
Relay outputs 230V 1 2 3 6 1 2
Relay output voltage-free 1 1 1
Outputs 0..10V or PWM signal
for speed control of high-efficiency pumps
1 1 2 2 1
Number of applications 9 25+ 42+ 48+ 4 8
Extension of pre-defined systems
by selectable additional functions
LEDs red/green for display of operating status
Statistics and graphic analysis of data memory
Flow based heat metering via Grundfos direct sensor (VFS / VVX) 2 2
Pressure monitoring via Grundfos direct sensor (RPS) 2 2
Battery-backed Real Time Clock > 24h
Time and Temperature-controlled thermostat function
Legionella function via solar
Legionella protecion via additional heating
Cooling function
Setup wizard
System protection
Collector protection
Storage protection (CP Tmax)
Anti-freeze protection
Recooling
Start logic for vacuum tube collectors
Control program for self-dumping systems (drain-back)
Function control and error memory with date and time
Menu blocker
Power supply for universal voltage range (100…240VAC) and reduced standby consumption
CAN bus connection for SOREL Connect
Data logging on microSD card via data logger via data logger
Ethernet connection via
data logger
via data logger ✓(only at V2)
Dimensions Height x Width x Depth in mm 115 x 86 x 45 163 x 110 x 51 163 x 110 x 51 228 x 180 x 53 163 x 110 x 51 163 x 110 x 51
Housing colour RAL 9003 RAL 9003 RAL 9003 RAL 9003 RAL 9003 RAL 9003
Protection Class IP40 IP40 IP40 IP40 IP40 IP40
Mounting Hardware, Spare Fuse and User Manual
pcsimulation

PC Simulation

Virtual simulators of any SOREL controller are available free of charge for easy product trial, technical trainings or to facilitate your customer support.

Request Simu
haendlersuche

Where to buy

Find your national SOREL contact person or the nearest SOREL retailer:

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