Robur Roburbox100, Инструкция по установке и эксплуатации

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GENERAL AND TECHNICAL FEATURES section
Ed. 06/2014 – FW version 1.002 15
1.4 OPERATING TECHNICAL FEATURES
Input management
For each request service on interface (4 in total), according to input configuration
(analogue/digital), RB100 sends turning-on or setpoint request to its DDC in different
ways.
Input specifications only apply if service is active, otherwise no request is
transmitted to DDC:
In particular:
¾
Input configured as digital setpoint:
•
the corresponding turning-on or setpoint request is sent to DDC if service contact
status is “closed”;
•
turning-off request is sent to DDC service if contact is “opened”.
Example of digital input management
For convenience, we refer to heating operation, but the same principle applies to all
request services.
When hot service contact closes, the appliance sends a setpoint request to DDC, thus
DDC manages hot units to meet such request.
Example:
Settings
PARAMETERS
VALUE
WATER THERMOSTAT ADJUSTMENT (set on DDC)
DELIVERY
LOCAL SETPOINT PARAMETER FOR DIGITAL INPUT (Setpoint sent from RB100 to
DDC)
+60°C
DIFFERENTIAL (set on DDC)
-10°C
Operating sequence:
•
hot service contact is closed on RB100 interface;
•
the +60°C setpoint request is sent to DDC (value set);
•
DDC turns on hot machines (if plant is switched to heating, otherwise non-available
service relay activates (APPENDIX);
•
machines are operating: plant water heats up to setpoint temperature = +60°C;
•
machines turn off: plant water, returning from line, gradually cools down to 50°C =
60°C – 10°C (se differential);
•
DDC restarts the machines: plant water heats up again.
•
The cycle repeats until the service contact corresponding to the request (in this case
the hot service) remains closed; if contact opens, the turning-off request reaches
DDC and DDC-controlled units turn off.