Technische Alternative UVR 16x2 User Manual

Solar start / drainback
134
Solar start parameters
Mode
Available for selection: Solar start func.
No. of functions included
Enter the number of functions included
Included functions
Sub-menu: List all the solar functions for the relevant collector array
Activation time
(from – to)
Time window in which the start function is permitted
Flushing time
Flushing time
Interval time
Maximum delay between flushes
Activation gradient
or
Without radiation sensor: The controller uses the activation
gradient to calculate a required temperature increase over the long
term average of the reference temperature, which will start the
flushing process. Setting range: 0-99
Radiation threshold
With radiation sensor: Radiation threshold in W/m
2
at which a
flushing process is permitted.
➢ If one of the included functions is active, the controller will not try to start the system.
➢ If a radiation sensor is used, instead of Activation gradient the computer displays the
required radiation threshold above which the start function is to be active.
➢ If the collector sensor specified in the input variables under Reference temp. is heated by
the sun, the radiation sensor can often be dispensed with. In that case, anaverage will be
calculated for the collector temperature, with special weighting given to the lowest
temperatures reached. The start function is activated when the collector temperature is
hotter than the average by the differential of the activation gradient. A lower activation
gradient therefore leads to an earlier start attempt, and a higher gradient to later attempts. If
it takes more than ten attempts to start the system, the activation gradient should be
increased; if it takes less than four attempts, the gradient should be reduced.
➢ As soon as one of the included solar functions is activated during a start attempt, the start
function will be terminated once the interval time has elapsed.
➢ If the activation gradient is set to zero, then only the activation or interval time will apply and
the temperature curve at the collector sensor will be ignored.

Technische Alternative UVR 16x2 Specifications

General

Data logging	Yes, internal memory
Weight	Approx. 300 g
Input Voltage	24 V DC
Display	LCD, 2x16 characters
Communication Interfaces	CAN
Dimensions	144 x 90 x 59 mm

Summary

General Information

Core Concepts

Input Variables

Explains the link between sensors and function inputs for data.

Parameters and Settings

Hystereses

Adjustable start and stop differentials creating switching hysteresis for control.

Analogue Function

Calculation Parameters

Settings for calculations like minimum, maximum, average, sum, and filter.

Multiplexer and Demultiplexer Parameters

Configuration for selecting input variables and routing output values.

Heating Demand

Cooling Demand

DHW Demand

Shading Function

Individual Room Control

Heating Circuit Control

Operation Modes

Blind Control

Cascade

Cooling Circuit Control

Pasteurisation Function

Message Function

Mixer Control

PID Control

P-I-D Values and Parameters

Explains proportional, integral, and derivative components for system control.

Profile Function

Time Switch

Time Programs and Settings

Scaling Function

Solar Cooling

Solar Control

Solar Start / Drainback

Timer Function

Parameters and Modes

Heat Meter

Parameters and Calibration

Maintenance Function

Conservatory Function

Input Variables and Parameters

Manages window ventilation based on room temp, wind, or rain sensors.

Meter / Counter

Hours Run and Pulse Counting

DHW Circulation

Input Variables and Parameters

Manages DHW circulation pump based on time, pulse, or mixing protection.