KTD Electronic regulator

Electronic regulator

Description
The KTD differential control unit is used to programme and control a solar thermal systems. Three different versions are available: the KTD4 version is included in the supply of the R586S-1 circulation group, while the KTD3 and KTD5 versions are used with the R586S circulation group and must be ordered separately. The control unit is user-friendly thanks to its backlit graphic dot matrix display, four buttons, handy programming assistant and on line help pages. It has inputs for temperature probes (like the PT1000), a relay output for controlling an electronic circulator, and one or two relay outputs for commanding a pump (operation/stop) or a motorised valve (open/ closed). The programs on the control unit allow you to set various system
configurations. Operation control functions range from the mere reading of the current measured values to long-term system monitoring and analysis by means of charts and statistics. Numerous other functions complete the possibilities offered by the KTD control unit:
• at any time, you can reset the previous values or, if necessary, the manufacturer's default values;
• the menu locking function prevents any unwanted modification of the operating parameters set during the unit programming phase;
• the anti-lockout function activates the pump or valve connected to the relay for 5 seconds, at regular intervals, to prevent any possible lockout due to a lengthy period of non-use;
• the anti-legionella function heats the boiler to a high temperature at fixed time intervals. The KTD3 and KTD5 versions allow you to view the thermal energy level produced by the solar thermal system thanks to the setting of certain
additional parameters (e.g. glycol type and percentage, and system flow rate); with the KTD4 version on the other hand, you can measure the thermal energy thanks to a specific combined sensor (temperature/flow rate).

Main characteristics
Casing: in 2 parts, ABS
Installation: integrated in the R586S circulation group, or separate (on the wall)
Display: graphic display, 128 x 64 points
Signalling: 1 multi-colour LED
Programming: 4 buttons
Dimensions: 163 x 110 x 52 mm
Compliance: Low Voltage Directive 73/23/EEC
as envisaged by 93/68/EEC,
Electromagnetic Compatibility Directive
89/336/EEC (92/31/EEC version,
93/68/EEC version)

Technical data
Supply voltage: 230 Vac +/- 10 %, 50...60 Hz
Current absorption: 2 VA
Inputs for probes: depending on the version (see table)
Measuring range Pt 1000: from -40 °C to 300 °C
Power outputs
• R1 electronic relay: min. 20 W...max. 120 W
• R2 mechanical relay: 460 VA / 185 W
Internal fuse: 2 A slow-blow 250 V
Protection degree: IP40
Protection class: II