Version 1.10 SYX660, SYX662, SYX663 and SYX664 New Features Released - Yplan, Underfloor and Boiler Sensor
| Support Home | Forums | Search |
News and Announcements Controls Discussion Forum / News and Announcements /

Version 1.10 SYX660, SYX662, SYX663 and SYX664 New Features Released - Yplan, Underfloor and Boiler Sensor

Author Dene M...
Moderator
#1 | Posted: 12 Feb 2017 16:48 | Edited by: Dene Matthews  
Better features make more customers happier and save more money - shipping from today the SYX66x range offer some new options:

Boiler Flow Sensor on the old DC1100
Now it is optional to remove the requirement for a Boiler Flow sensor. In the SYX Boiler Set-Up menu the boiler flow sensor used can be set to No or Yes (yes default). This allows easier replacement of a DC1100 or DC1400. The DC controllers would allow the boilers to work without being controlled from a sensor. In today's energy focused world we will always recommend that a sensor is added to the scheme if the original installation wasn't fully featured. When a fast replacement is needed and you don't have a flow sensor available at that time it means the new controller wont run as expected. So to help, we have added the option to no flow sensor operation as was with the DC controller. Adding a Boiler flow sensor later is always advisable and possible, this will allow the boilers to be set point controlled based on the demands of the Heating and HWS as required. The sensor costs will swiftly be recovered through better control.

Not having a flow sensor means the boilers control to the thermostats set on the boilers so these must be set appropriately. Always check, never assume correct settings.

Poor control has seen the increase in Boiler Optimiser control concepts, these interrupt the boilers to increase the use of residual energy and prevent cycling when load is sensed to be small. Checking your controls for correct operation should be your primary task as the controls will prevent the boilers from running for small loads in the first place.

Y Plan Control Option
We have seen several installations where the original DC controller was not applied in the correct way. To help the customer we have added the control mode option of Y plan. This allows a heating and separate hws on/off output from the controller whilst allowing the heating to be optimised and the boilers compensated when the HWS is satisfied by monitoring the cylinder thermostat. The controller can still offer HWS Priority if it is needed and all the remaining SYX features are the same.

Because the VT valve is not used we can use the usual VT Open output for the HTG enable and we can use the VT Valve Close output for the HWS Valve enable. Simply re-allocate the HWS Thermostat to provide a volt free HWS demand on the SYX auxiliary input and set this for HWS Demand Control in the Overrides Set-Up menu.
Link the HWS to be Interlocked to the Boilers in the HWS Menu
Choose the Heating Set-up Menu control mode to be Y Plan (Also can be used for S plan)

The system replaces a DC controller used in this way as sensors for Outside and room, boiler etc will be in place.

Underfloor Heat Demand
In buildings where underfloor heating is used we can monitor the manifold heat demand signal to request the Boiler and enable the VT Valve to start controlling the variable temperature that the floors require but only when a zone is in demand. Connect a volt free demand signal into the Auxiliary input from the Heat demand signal of the underfloor heating system

As always, please post questions if you have any
News and Announcements Controls Discussion Forum / News and Announcements / Version 1.10 SYX660, SYX662, SYX663 and SYX664 New Features Released - Yplan, Underfloor and Boiler Sensor Top
 
  Controls Discussion Forum Powered by Bulletin Board Script miniBB ®