Tabla De Contenido - Technische Alternative ESR 21 Manual Del Usario

Simple solar control unit
The ESR21-R or ESR21-D is a differential control unit that has been consciously made
easy to install and operate. Its wide range of controls makes it useful in a multitude of appli-
cations.
It offers the following functions:

All of the switch-on and switch-off points can be set separately

A clear display with icons for all of the values displayed

Status display for the immediate recognition of extraordinary conditions

Solar start function

Pump blockage if collector overheats

Anti-freeze function

Heat quantity counter

Pump speed control (ESR21-D only)

Data link (for temperature evaluation on PC via D-LOGG, BL-NET or C.M.I.)

Use of KTY (2 k) or PT1000 temperature sensors

Overvoltage protection at all inputs

Easy to install and operate
Table of contents
Hydraulic diagrams ................................................................................................ 4
Solar unit program 0, 1 ............................................................................... 4
Sensor installation ................................................................................................. 5
Installing the device ............................................................................................... 5
Electrical connection ................................................................................... 6
Safety requirements ............................................................................................... 6
Operation .......................................................................................................... 7
The main level ........................................................................................................ 8
The parameter menu Par ....................................................................................... 9
Changing a value (parameter) .................................................................. 10
The menu Men ..................................................................................................... 10
Status display Stat ............................................................................................... 10
Tips onTroubleshooting ........................................................................................ 11
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