Riello BeSMART Installer And User Manual page 9

Boiler
characteristics
Boiler with
variable delivery
temperature
(controlled by
communication
bus)
Definition of classes
Class I – On/off room thermostat: a room thermostat that controls the on/off
operation of a heater. Performance parameters, including switching differen-
tial and room temperature control accuracy are determined by the thermo-
stat's mechanical construction.
Class V – Modulating room thermostat, for use with modulating heaters: an
electronic room thermostat that varies the flow temperature of the water leav-
ing the heater dependent upon measured room temperature deviation from
room thermostat set point. Control is achieved by modulating the output of
the heater.
Class VI – Weather compensator and room sensor, for use with modulating
heaters: a heater flow temperature control that varies the flow temperature of
water leaving the heater dependent upon prevailing outside temperature and
selected weather compensation curve. A room temperature sensor monitors
room temperature and adjusts the compensation curve parallel displacement
to improve room comfort. Control is achieved by modulating the output of
the heater.
Class VIII – Multi-sensor room temperature control, for use with modulating
heaters: an electronic control, equipped with 3 or more room sensors, that
varies the flow temperature of the water leaving the heater dependent upon
the aggregated measured room temperature deviation from room sensor set
points. Control is achieved by modulating the output of the heater.
BeSMART configuration
Connection via communication bus to the
BeSMART. Delivery temperature to the
boiler calculated on the basis of at least
3 distinct room temperatures. At least 3
BeSMARTs (sensors) connected to at least
3 zone valves (actuators) are required.
9
Class and
contribution
VIII = 5%