Issue
DC1100 / DC1400 Optimiser / Compensator Controller switched contact output compatibility with existing Boiler / Pump / Control Valve Actuator control circuits.
Environment
- Stand alone Optimiser / Compensator Controller
- CMC1801
- CMC1802
- CMC1803
- CMC1826
- CMC3803
- CSMC3804
- CSMC3805
- DC1100
- DC1400
- Contacts
- Output
Cause
DC1100 / DC1400 Optimiser / Compensator Controller is to be connected to existing Boiler / Pump / Control Valve Actuator control circuits previously connected to Satchwell CMC or CSMC Optimiser / Compensator Controller.
Resolution
IMPORTANT NOTE
Satchwell CMC / CSMC Controller output contacts are VOLT FREE.
S-E Satchwell DC1100 / DC1400 Controller output contacts are LIVE MAINS VOLTAGE.
It may therefore be necessary to install Relays between the DC1100 / DC1400 outputs and any Plant Control Circuits / Control System Devices under control.
For example, where a 24v Valve Actuator was originally controlled via volt free contact outputs of a CMC / CSMC Controller then the Actuator may now need to be controlled via live mains voltage contact outputs of a DC1400 Controller.
A 230v coil Relay will therefore need to be connected to the Valve Open contact output of the DC1400 Controller while another 230v coil Relay is connected to the Valve Close contact output of the DC1400 Controller.
The 24v power to drive the Valve Actuator Open and the 24v power to drive the Valve Actuator Close should then be connected to the Valve Actuator via the contacts of the appropriate Relays.
Should the 24v power source originally have been provided by the CMC / CSMC Controller and no other 24v power source is available on the existing installation then this may be remedied by the installation of a S-E TR 230/24v Transformer.
N. B.
Normally a Satchwell CMC or CSMC Controller would be replaced by a S-E Satchwell DC1400 Controller in order that existing Satchwell Sensors may be retained for connection to the DC1400 Controller.
In the event that a Satchwell CMC or CSMC Controller should be replaced by a S-E Satchwell DC1100 Controller then any existing Satchwell Sensors will also need to be replaced.
DC1100 Overview details appear here.
DC1100 Wiring and Commissioning details appear here.
DC1400 Overview details appear here.
DC1400 Wiring and Commissioning details appear here.
TR Transformer details appear here
