Differential controller SGC26H

Presentation

The differential controller SGC26H is intended for the control of domestic hot water heating systems with flat or vacuum collectors and auxiliary heat sources.

In domestic hot water heating systems with flat or vacuum collectors.
In domestic hot water heating systems with auxiliary heat sources.
In storage tank heating systems using a solar system and auxiliary heat sources.
In pool heating systems.

Features

22 preset hydraulic schemes.
1 freely programmable output.
Rotation speed control of 1 classical pump (RMP).
Rotation speed control of 1 energy-efficient pump (PWM, 0–10 V).
Control of two collector field systems.
Control of 2 storage tanks systems.
Possibility to control heating systems using a solid fuel boiler.
Wizard for an easy and quick device start-up.
Measurement and display of generated energy.
Solar system protection when collectors are overheating.
Notifications on the activated protection functions and warnings about system failures.
Possibility to simulate sensors and analyse the system operation.
Remote control with the help of the SeltronHome system.

Documentation

Download

Technical Data Sheet - EN (PDF)

Outlined functions

Start-up wizard

The SGC controller is equipped with a start-up wizard, which takes you through the initial setup of the controller in 2 steps.

Step 1: language selection.
Step 2: hydraulic scheme selection.

Measurement of the energy obtained

When the solar system is also used for domestic hot water heating, we want to know how much heating energy has been obtained from the solar system. The SGC controllers provide an informative and accurate measurement of the solar energy obtained and the display of the data in weekly, monthly and yearly diagrams.

For informative measurements of the solar energy obtained, the maximum reading of the medium flow from the mechanical meter must be entered in the controller setup.
For accurate measurements of the solar energy obtained, a flow meter with a pulse generator or a Vortex flow meter (VFS) must be installed in the solar system.

Connection of an energy-saving circulation pump with external controlled signal

The SGC controller features the speed control of energy-saving circulation pumps with external controlled PWM signal or 0÷10 V. This type of speed control is possible with R2 and R3 relay outputs. All SGC controllers feature the R2 relay output, while the SGC36HV and SGC67HV controllers feature the R3 relay output.

KXD Remote control with the help of SeltronHome system

The SGC controllers may be connected to the SeltronHome platform, which provides the heating remote control using a smartphone or tablet. Remote control is enabled through the CLAUSIUS application for the end user and the KELVIN app for service technicians. With the application you can, for example, switch on one-time domestic hot water heating process outside of a time programme.

Typical hydraulic scheme

Solar collectors, domestic hot water storage tank, solid fuel boiler, auxiliary heating with electricity.

Example: hydraulic scheme 231d.

Technical data

Tehnični podatki	SGC26H
Backlit graphic display
Operating hours meter
Weekly program timer
Connection voltage	230 V~, 50 Hz
Own consumption	2.5 W
Standby power consumption	Max. 0.5 W
No. of inputs	6 pcs temperature sensor (Pt 1000) 1 pc pulse input
No. of outputs	1 pc Triac for speed control (R2) 1 pc PWM or analogue 0÷10 V (Y2)
Relay outputs	4 (1) A ~, 230 V~
Triac outputs	1 (1) A ~, 230 V~
Power supply of built-in clock	Battery CR2032 (Li-Mn) 3 V
Accuracy of built-in clock	+/-1 s (24 h) at 20 °C
Degree of protection	IP20 / EN60529
Safety class	I according to EN 60730-1
Operation mode	1B according to EN 60730-1
Type of temperature sensors	Pt1000 or KTY10
Housing material	ASA – thermoplastic
Permissible ambient temperature	0÷40 °C
Storage temperature	-20÷65 °C
Product weight	400 g
Number of pieces in a package unit	6 pieces
Dimensions
Electrical connection

Performance comparison

	SGC16H	SGC26H	SGC36HV	SGC67HV
Application
In domestic hot water heating systems with flat or vacuum collectors
In domestic hot water heating systems with auxiliary heat sources
In storage tank heating systems using a solar system and auxiliary heat sources	—
In pool heating systems	—
For a single-stage storage tank loading	—	—
For a two-stage storage tank loading	—	—	—
Technical characteristics
No. of preset hydraulic schemes	5	22	53	65
No. of mechanical relays	—	1	1	4
Number of electronic relays	1	1	2	2
No. of temperature sensor inputs	6	6	6	7
Number of collector fields	1	2	2	2
No. of storage tanks	1	2	3	3
Measurement of the energy obtained (kWh)
Option for pulse meter flow measurement (l/min)
Possibility for flow measurement with a Vortex sensor VFS	—	—
Speed control for energy-saving pumps (PWM, 0÷10 V)	1 pump	1 pump	2 pumps	2 pumps
Speed control for standard pumps (RPM)	1 pump	1 pump	2 pumps	2 pumps
Free programming option	—	1 output	2 outputs	3 outputs
System control
Collector fields	1	2	2	2
Storage tanks	1	up to 2	up to 3	up to 3
Solar system domestic hot water heating and an auxiliary heat source	—
Heating support	—
Pool heating	—
Using a solid fuel boiler	—	—	—
Quick cold storage tank start function	—	—	—
Heat source control
Flat or vacuum collectors
Solid fuel boiler
Solid fuel boiler with a pellet burner	—
Liquid fuel boiler	—
Combined boiler	—
Gas flow boiler	—
Heat pump	—
Storage tank
Auxiliary heating using electric heater	—
Options for switching on auxiliary energy sources
The controller features the option of an auxiliary source for heating the water to the minimum temperature
The option for starting the primary energy source immediately or only when the water cannot be heated in a certain period of time	—
The option for configuring the time during which we allow water heating only by using collectors – the controller will not switch on the primary heat source if the calculations show that the water can be heated only by collectors	—
Operation mode with several storage tanks
Constant operation in the “OPTIMUM” mode means an optimum use of solar energy for heating all of the storage tanks taking into account the preferred storage tank	—
The "AUTO" operation mode automatically switches between winter and summer modes according to a preset calendar	—
Constant operation in the “SUMMER” mode means the heating of only the preferred storage tank, other storage tanks are heated only when the preferred one reaches the desired temperature	—
Continuous operation in the “WINTER” mode means an alternating parallel heating of all storage tanks	—
Heating of all storage tanks	—
User functions
Domestic hot water heating according to the time programme
Holiday operation mode
One-time domestic hot water heating
Heating system protection
Anti-legionella protection (for a controlled energy source)
Collector frost protection
Forced pump start at the highest collector temperature
Switching off of the pump when the safety temperature has been exceeded
Solar system protection when collectors are overheating
Storage tank overheating protection
Storage tank recooling to the desired temperature
Periodic starts of pumps during a period of inactivity
A comprehensive overview of the heating system operation
Graphic display of temperatures according to days of the last week
Detailed display of temperatures for the current day
Archiving and graphic display of the solar energy obtained
Notifications on the activated protection functions and warnings about system failures
Possibility to simulate sensors and analyse the system operation.
Remote access
Possibility of USB connection to a PC
Possibility of connectivity to the SeltronHome platform, which allows remote control via a smartphone or tablet
Setup and installation
Wizard for an easy and quick device start-up
13-language user interface
Languages: EN, DE, FR, NL, PL, ES, SL, IT, CS, LT, GR, HU, HR
Setting up the operation by selecting the hydraulic scheme
“Help” button for quick help with the setup
Graphically adjustable time programmes
Option to simulate the system operation
Logging and display of changes made to the setup
Option for retrieval of the basic setup in the event of data loss or unwanted changes
Option for programming free outputs
Possibility of wall or DIN rail installation
Simple installation and connection