Proxel Engineering Ltd ------------------------www.proxel-bg.com----------------- -DTSF3+ v2.4 /2017
„DTSF3+” Temperature Controller For Solar Thermal And Heating
Application With 8 Schemes
BRIEF DESCRIPTION
The unit is a programmable digital temperatute controller for solar thermal and
heating plants. It manages the interaction between the solar collector, hot water tank,
storage tank, boiler, pumps, valves and electric heater. The unit helps to improve
thermal comfort by combining high efficiency with autonomy of the system. The
joint functional work of differential temperature, built-in clock and a flexible treshold temperatures
further helps to increase energy savings. It has 8 pre-programmed functional diagrams which cover
vast range of prooved by practice application. The application of the device extends from thermo-
syphonic solar water heaters to more complex solar systems with a combination of hot water tank
and storage tank, boiler and heating. It also can control one HF pump with PWM input.
Functional diagrams, schemes, sensors and outputs arrangement:
1
Scheme 0
– Thermosyphonic panel with integrated tank and trace heating
Sensors
Schm=0; “TSyphTrH”
•
TS1 – trace temperature
•
TS2 – solar tank temperature
•
TS3 – not used;
•
Level sensor - Terminals 3 and 4
Outputs
•
R1 – trace heater
•
R2 – electric heater of solar operated tank
•
R3 – refill valve (N.C.)
Level sensor:
Controls electric valve for proper boiler fill up while monitoring the water level with submerged
electrode.
2
Scheme 1-
Thermosyphonic panel with integrated tank and recirculation;
Sensors
Schm=1; “TSyphReC”
•
TS1 – temperature of suplimentary tank/recirculation point
•
TS2 – solar tank temperature
•
TS3 – trace temperature
Outputs
•
R1 – recirculation pump
•
R2 – electric heater of solar operated tank
•
R3 – * valve – not used
3
Scheme
2- Solar panel with one storage tank and electric heater (standard)
Sensors
Schm=2; „dT.EL+T1”
•
TS1 – temperature of solar panel
•
TS2 – tank temperature at bottom (at coil position)
•
TS3 – tank temperature at top (for heater control)
Outputs
•
R1 – solar pump
•
R2 – electric heater of tank
•
R3 – emergency draining valve
4
Scheme
2а - Solar panel with two storage tanks – Ta-with electric heater, Tb-with solar heating,
Sensors
Schm=2; „dT.EL+T1”
•
TS1 – temperature of solar panel
•
TS2 – temperature of electric heater operated tank
•
TS3 – temperature of solar operated tank
Outputs
•
R1 – solar pump
•
R2 – electric heater of tank
•
R3 – emergency draining valve
2
5
Scheme
3 - Solar panel with two storage tanks – main and suplimentary with priority
Sensors
Schm=3;“dTETa/Tb”
•
TS1 – temperature of solar panel
•
TS2 – temperature of tank („A”) - main
•
TS3 – temperature of tank („B”) -suplimentary
Outputs
•
R1 – solar pump
•
R2 – electric heater of tank („A”)
•
R3 – 3-way valve main/suplimentary tank
6
Scheme
3а - Solar panel with one tank with two solar coils and electric heater
Sensors
Schm=3;“dTETa/Tb”
•
TS1 – temperature of solar panel
•
TS2 – temperature of tank – top („A”)
•
TS3 – temperature of tank – bottom („B”)
Outputs
•
R1 – solar pump
•
R2 – electric heater of tank
•
R3 – 3-way valve top/bottom
7
Scheme
4 - Solar panel with one tank with two coils, electric heater and suplimentary heater
Sensors
Schm=4; “1B+2C+EL”
•
TS1 – temperature of solar panel
•
TS2 – tank temperature
•
TS3 – suplimentary heating source temperature
Outputs
•
R1 – solar pump
•
R2 – electric heater of tank
•
R3 – DHW suplimentary heating valve/pump
8
Scheme
5 - Solar panel with one tank with two coils, suplimentary heater and heating pump
Sensors
Schm=5; “SolDhwCh”
•
TS1 – temperature of solar panel
•
TS2 – tank temperature
•
TS3 – suplimentary heating source temperature
Outputs
•
R1 – solar pump
•
R2 – circulation pump for domestic heating
•
R3 – DHW suplimentary heating valve/pump
9
Scheme
6 – Solar/supplementary heater with two tanks and two pumps, no priority
Sensors
Schm=6; “SOL+2P2T”
•
TS1 – temperature of heat source
•
TS2 – temperature of tank – “A”
•
TS3 – temperature of tank – “B”
Outputs
•
R1 – pump for tank “А“
•
R2 – electric heater of tank “А”
•
R3 – pump for tank “B”
10
Scheme
7 – Unpreasurized solar panel (open to air system) with el. heater and refill function
Sensors
Schm=7; “dT.EL.T1+R”
•
TS1 – temperature of solar panel
•
TS2 – temperature of solar tank
•
TS3 – not used
•
Level sensor - Terminals 3 and 4; reads level of liquid
Outputs
•
R1 – solar pump
•
R2 – electric heater of tank
•
R3 – refill valve (N.C.)
Level sensor: C
ontrols electric valve for proper solar panel fill up while monitoring the water level with
submerged electrode.
