Miscellaneous; Several Controllers In The Same System - Danfoss ECL Comfort 210 Installation Manual

Installation Guide

9.0 Miscellaneous

9.1 Several controllers in the same system

When ECL Comfort controllers are interconnected by means of
the ECL 485 communication bus (cable type: 2 x twisted pair), the
master controller will broadcast the following signals to the slave
controllers:
• Outdoor temperature (measured by S1)
• Time and date
• DHW heating activity
Furthermore, the master controller can receive information about
the desired flow temperature (demand) from slave controllers.
SLAVE controllers: How to make use of the outdoor
temperature signal sent from the MASTER controller
Situation 1:
The slave controllers only receive information about outdoor
temperature and date / time.
SLAVE controllers:
Change the factory set address from 15 to address 0.
• In , go to System > Communication > ECL 485 addr:
ECL 485 addr. (master / slave address)
Circuit
SLAVE controller: How to react on a DHW heating demand sent
from the MASTER controller
Situation 2:
The slave receives information about a DHW heating activity in
the master controller and can be set to close the selected heating
circuit.
SLAVE controller:
Set the desired function:
• In circuit 1 / circuit 2, go to 'Settings' > 'Application' >'DHW
priority':
DHW priority (closed valve / normal
operation)
Circuit
1 / 2
OFF: The flow temperature control remains unchanged
during active DHW heating / charging in the master
controller.
ON: The valve in the heating circuit is closed during active
DHW heating / charging in the master controller.
Danfoss District Energy
ECL Comfort 210 / 310, application A275 / A375
2048
Setting range Choose
0 ... 15
11052
/ 12052
Setting range
Choose
OFF / ON OFF / ON
In a system with MASTER / SLAVE controllers, only one MASTER
controller with address 15 is allowed.
If by mistake more MASTER controllers are present in an ECL 485
communication bus system, decide which controller is to be MASTER.
Change the address in the remaining controllers. However, the system
will operate but not be stable with more than one MASTER controller.
In the MASTER controller, the address in 'ECL 485 addr. (master / slave
address)' , ID no. 2048, must always be 15.
0
VI.GU.L1.02 DEN-SMT/DK 167