Flow / Power Limit - Danfoss ECL Comfort 310 Installation Manual

Installation Guide

5.4 Flow / power limit

A flow or energy meter can be connected (M-bus signal) to the ECL
controller in order to limit the flow or consumed power.
The flow / power limitation can be based on the outdoor
temperature. Typically, in district heating systems a higher flow or
power is accepted at lower outdoor temperatures.
The relationship between the flow or power limits and the outdoor
temperature is set in two coordinates.
The outdoor temperature coordinates are set in 'High T out X1'
and 'Low T out X2'.
The flow or power coordinates are set in 'Low limit Y1' and 'High
limit Y2'. Based on these settings, the controller calculates the
limitation value.
When the flow / power gets higher than the calculated limit, the
controller gradually reduces the desired flow temperature to obtain
an acceptable max. flow or power consumption.
Actual (actual flow or power)
Circuit
1
The value is the actual flow or power based on the signal from flow / energy
meter.
Actual limit (limitation value)
Circuit
1
The value is the calculated limitation value.
High T out X1 (flow / power limitation, high limit, X-axis)
Circuit
1
Set the outdoor temperature value for the low flow / power limitation.
The corresponding Y coordinate is set in 'Low limit Y1'.
82 DEN-SMT/DK
ECL Comfort 310, application A376
11110
Setting range Factory setting
Read-out only
11111
Setting range Factory setting
Read-out only
11119
Setting range Factory setting
-60 ... 20 °C 15 °C
Flow / power limitation
High limit Y2
Low limit Y1
-15
Low T out X2 High T out X1
Flow / power
limitation
Desired flow
temp.
VI.GU.B1.02
Outdoor temp.
° C
15
Limit
Time
Danfoss District Energy