1. Rapidzone Operation: Network Data Sharing
Discharge air temp information is broadcast to zone controllers via E-Bus
Discharge Air Temp
DAT
RTU TL Z1 Z2 Z3
Terminal load information is sent to RTU controller via E-Bus
Terminal Load

2. Zone Controller Operation: DAT Control
Suitable?
DAT in
MOD
Open Y
Occupied
mode? N
Damper
Min Pos Y
Damper
Closes N

3. Setpoint Knob Operation
Setpoint knob determines centre of deadband between heating and cooling
Example:
deadband is set for 6°
knob set for 73°
heat setpoint becomes 70 °
cool setpoint becomes 76 °
deadband exists between 70 ° - 76 °
Heating
Setpoint
Cooling
Setpoint
Deadband 73 70 76

4. Rapidzone Operation: Terminal Loads
Terminal Load: zone deviation from setpoint
Terminal Load is broadcast from each zone to RTU via E-Bus
< 20 % zone is satisfied
> 20 % zone requires heating or cooling
Zones can be configured as ‘priority’, terminal load multiplied by 1.5
163%
-163%
0 %
Heat On
Cool On
+20 %
-20 %
Deadband
Zone Satisfied

5. Terminal Load RTU Z1 TL + 18 Z2 TL + 18 Z3 TL + 25
RTU will run in cooling mode until Zone 3 is satisfied (TL drops below 20%)
Zones 1 and 2 remain closed or in minimum position Z1
TL + 18 Z2
TL + 18 Z3
TL + 25

6. Terminal Load RTU Z1 TL - 25 Z2 TL + 18 Z3 TL + 25
RTU will alternate between heating and cooling until:
zone 1 heating satisfied
zone 3 cooling satisfied
Zone 2 remain closed or in minimum position
Length of Heat / Cool runtime entered by Rapidzone software Z1
TL - 25 Z2
TL + 18 Z3
TL + 25

7. Terminal Load RTU Priority Z1 Z2 Z3 TL + 25 TL + 18 TL - 18 x 1.5
Zone 2 configured as priority zone, terminal load multiplied by 1.5
RTU will alternate between heating and cooling until:
zone 2 heating satisfied
zone 3 cooling satisfied
Zone 1 remain closed or in minimum position
Length of Heat / Cool runtime entered by Rapidzone software
Priority Z1 Z2 Z3
TL + 25
TL + 18
TL - 18
x 1.5
TL - 27