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Small Temperature Difference Controller v4

Starting at: £82.05 ex VAT
£98.46 inc VAT

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  • Model: STDCV4


"Small" Temperature Difference Controller with 1 SS Relay & 1 PWM
For 9 solar, storage and solid fuel boiler-systems
The STDC 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, according to your needs.

  • 3 sensor inputs for Pt1000 temperature sensors
  • 1 relay plus 1 optional PWM/0-10V output

  • for 9 basic systems
  • 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 115mm W 86mm D 45mm

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 (V3 and V4 only)

STDC Version4 Technical features:
Temperature sensors Pt1000 3
Relay outputs 230V*
    of which for speed control of standard pumps
Outputs 0..10V or PWM signal 1
VFS/RPS sensors 0
Number of applications 9
LEDs red/green for display of operating status 0
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 No
Cooling function No
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) No
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

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