Application

Application Notes
Sequence of Operation – Summary
28
Siemens Industry, Inc.
Application Note
A6V11692042
Smart Infrastructure – Building Products
2019-04-01
Room GreenLeaf
The GreenLeaf symbol on the room operator unit indicates that the room is
operating in an energy-efficient manner (symbol glows green). A user-entered
setpoint change to a non energy-efficient state will result in the leaf symbol turning
red.
⚫ Occupant can restore the room to energy efficiency by pressing the GreenLeaf
button (direct press on leaf symbol). Pressing the GreenLeaf button when it is
red removes the manual setpoint shift and restores the room to energy
efficiency (symbol glows green).
⚫ Setpoint shift tolerance before leaf symbol turns red is 44°F (2C), configurable.
⚫ GreenLeaf status can be externally reset to green (e.g. schedule change). The
behavior is configurable.
Central plant coordination
Collect demand from VAV supply air terminal boxes
The central plant collects and evaluates VAV supply airflow information to
coordinate primary air demand requests from the terminal boxes with central AHU
supply capacity.
Collect demand from room hot water valves (e.g., hot water radiators and
heating coils)
The central plant collects and evaluates hot water demand requests for the primary
hot water plant. In addition, central plant coordination provides for the following:
⚫ Operates the hot water system responsive to room operating modes;
⚫ Kick function (stroke the valves periodically to prevent sticking);
⚫ Disable hot water consumers in hot weather;
⚫ Permits valve position override for balancing or commissioning.
– END OF SEQUENCE OF OPERATION SUMMARY –
(see table of contents for additional information / remaining document sections)