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Medium Temperature Difference Controller for midsize systems

For 25 basic systems with additional functions for unused relays 

The MTDC is available in different versions with variable relay combinations. It can be equipped with or without speed-control of standard pumps, high-efficiency pumps or both, just according to your needs. 


Sensors and power cable not included.

Connections: 3 sensor inputs for Pt1000 temperature sensors  2 relays and optional PWM0-10V outputs

Features: for 25 basic systems with solar or solid fuel boiler with additional functions for unused relays Self-explanatory operation via 4 entry keys Multilingual full-text menu with help texts and graphic mode with animations

High-contrast lighted display with 128x64 dots Function check and graphical system analysis with long-term memory for statistics about heat quantity and operating hours RTC Real Time Clock with >24h power reserve 

White housing

RAL9003, protection class IP40,

dimensions H 163mm W 110mm D 51mm

Mounting hardware, spare fuse and user manual Basic systems: Solar with storage Solar with swimming pool Solid fuel boiler with storage Storage transfer

Return flow increase Thermostat function Universal Delta T Stop valve Solar with heat exchanger and pool

Solar with thermostat Solar two-zone storage Solar with heating circuit Solar with bypass Solar with heat exchanger

Solar with 2 collector surfaces

Solar with 2 collectors and 2 pumps

Solar with 2 storages and 2 pumps

Solar with 2 storages and valve

Solar with storage transfer

Solar with pool and heat exchanger

Solar with thermostat and valve

Solar with solid-fuel boiler

Solar with cooling 1 (collector cooling)

Solar with cooling 2 (collector cooling)

Solar with cooling 3 (storage cooling)


Additional functions for unused relays:

Solar bypass Backup heating control

Cooling function Return flow increase Anti-legionella function

Storage transfer Universal DeltaT Always On Solid fuel boiler control

Signaling with activated protection function

Signaling with new information message Pressure monitoring Booster for fast system loading

Heating circuit Parallel operating with R1 Parallel operating with R2 Thermostat 2



MTDC Version 5 Technical features

Temperature sensors Pt1000: 0

Relay outputs 230V* of which for speed control of standard pumps: 2

1 Outputs 0..10V or PWM signal: 1

VFSRPS sensors: 0

Number of applications: 25+

LEDs redgreen for display of operating status: 1

Simple heat metering: Yes

Flow based heat metering (Grundfos VFS sensor): No

Pressure monitoring (Grundfos RPS sensor): No

Time and temperature-controlled thermostat function: Yes

Battery-backed Real Time Clock: Yes

Legionella protection via solar: Yes

Legionella protection via additional heating: Yes

Cooling function: Yes

Setup wizard: Yes

System protection: Yes

Collector protection: Yes

Storage protection: Yes

Anti-freeze programs: Yes

Recooling: Yes

Start logic for vacuum tube collectors: Yes

Control program for self-dumping systems (drain-back): Yes

Data storage with statistics and graphic analysis: Yes

Error memory and analysis with date and time: Yes

Menu blocker: Yes Ethernet connection (via data logger): No

Warranty: 2 Years

Sorel MTDCV5

Sales Tax Included

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