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Resol Solar Controllers -
DeltaSol® AX
Universal and robust differential temperature controller for solar systems.The DeltaSol® AX is equipped with an adjustable target temperature for minimum or maximum temperature limitation (adjustable by micro-switch). The enclosed silicone sealing cord guarantees a protection against dripping water.
Adjustable temperature difference 2 ... 16 K, hysteresis 1,6 K
Frost protection adjustable by jumper / micro-switch
Maximum or minimum temperature limitations adjustable by micro-switch
DeltaSol® AL / AL-E
DeltaSol® BS4
The RESOL controller for standard solar thermal systems. The DeltaSol® BS controller provides a clear operating concept and is equipped with a display for system-monitoring. Flashing symbols for sensors, pumps and valves enable an immediate allocation of temperatures, temperature differences and active actuators. Details concerning the type and number of the relays as well as additional functions are shown in the table.
Illuminated system-monitoring-display
Up to 4 temperature sensors Pt1000
Pump speed control, Solar operating hours counter
Thermostat function
Tube collector function
Heat quantity measurement,
Heat Dump
Legionella Function
Drainback Option
Holiday Cooling Function
Resol VBus
DeltaSol® BS Plus
DeltaSol® BX
The New DeltaSol® BX is equipped with four relay outputs as well as two PWM outputs for the speed control of energy-saving high-efficiency pumps. Additionally, the controller is equipped with five Pt1000 sensor inputs, two analog Grundfos sensor inputs, an impulse input (V40 Flowmeter) as well as a supplemental L`- output for the connection of an actuator.
The integrated SD memory card slot enables an easy datalogging to an SD memory card as well as a quick and effortless transfer of logged system data to a PC. The extra-large display gives a precise visualisation of the system status.
Pre-defined functions allow easier parametrisation of the system; functional additions such as a drainback option broaden the range of applications. Of course, the DeltaSol® BX is also equipped with a RESOL VBus®.
Extra large display
4 relay outputs
7 sensor inputs
Inputs for Grundfos Direct Sensors
Speed control of high-efficiency pumps
Datalogging onto SD memory card (not supplied)
Drainback option
RESOL VBus®
Energy-saving switch-mode power supply
East/West, 2 Stores, afterheat etc
DeltaSol® E
DeltaSol® MX
The DeltaSol® MX is equipped with 14 relay outputs and four PWM outputs for the speed control of energy-saving high-efficiency pumps; all PWM outputs can be converted into 0-10 V signal outputs. Additionally, the controller has one frequency input, three impulse inputs as well as a range of different sensor inputs. Up to five extension modules can be connected via the RESOL VBus®.
The integrated SD memory card slot enables an easy datalogging to an SD memory card as well as a quick and effortless transfer of logged system data to a PC. The large full graphic display allows the direct display of balance and progression diagrams.
Pre-defined functions allow easier parameterisation of the system; functional additions such as a drainback option broaden the range of applications.
Full graphic display
14 relay outputs
15 sensor inputs
Inputs for Grundfos Direct SensorsTM
Speed control of high-efficiency pumps
Datalogging onto SD memory card
Drainback option
RESOL VBus®
Energy-saving switching-mode power supply
The DeltaSol® AL solar controller is a temperature differential controller that offers all vital functions for a standard solar thermal system. The controller is equipped with a System-Monitoring-Display, which visualises the system parameters quickly and easily. For data communication, the controller has a RESOL VBus® to which additional modules such as remote displays or dataloggers can be connected. The DeltaSol® AL offers e. g. a heat quantity measurement, a solar operating hours counter and can be switched between °C and °F. Operation and function control are as easy as usual.
The AL-E has the added advantage of having built in 16A relays capable of operating an immersion heater - enabling easier installation without the addition of auxilliary relays.
System-Monitoring-Display
Up to 3 Pt1000 temperature sensors
Heat quantity measurement
Easy Manual Pump Switching
Solar operating hours counter
Housing with brand new design
Intuitive operating concept
RESOL VBus®
Extra-low standby power consumption
The DeltaSol® BS Plus controller is pre-programmed for different hydraulic basic systems and equipped with pump speed control and heat quantity measurement.The controller additionally has a time controlled thermostat function and is equipped with the RESOL VBus® for data communication. This VBus® permits twoway communication between modules, PCs or dataloggers. The controller can easily be configurated by PC using the RESOL ServiceCenter Software. Temperatures in certain time slots can be adjusted independently using the integrated thermostat function and real time clock.
Illuminated system-monitoring-display
Up to 4 temperature sensors PT1000
2 semiconductor relays for pump speed control
9 basic systems are possible
Heat quantity measurement
East/West or 2 Store Systems
Thermostat function (time-controlled)
RESOL VBus®
A multitude of adjustable functions and options are possible using 7 relay outputs and 10 sensor inputs for Pt1000, CS10 and V40. Due to its intelligent and easy-to-understand system configuration and its integrated calorimeter, the controller also offers the control of complex systems with up to 4 weather-compensated heating circuits. For data communication and remote maintenance, the controller is equipped with the RESOL VBus®, which permits two-way communication between modules, PCs or dataloggers.
7 basic systems to choose from
Pump speed control, Solar operating hours counter
Heat quantity measurement
Internal calorimeter
4 heating circuits can be activated
10 sensor inputs
7 relay outputs
Function control
RESOL VBus®
For Professional Users.
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