Emerson Liebert iCOM Manual De Usuario
Teamwork
79
Liebert
®
iCOM
®
The master unit determines that a 60% call for cooling is required for the system. Since there are two
available cooling units, each unit makes up half of the system proportional band; Unit 1 handles
0-50% system call for cooling and Unit 2 handles 51-100%. For every 1% system call for cooling, each
unit provides 2% of its total cooling capacity.
The 60% system call for cooling exceeds the 50% Unit 1 can provide, so Unit 1 operates at full
The 60% system call for cooling exceeds the 50% Unit 1 can provide, so Unit 1 operates at full
capacity. The remaining 10% system call for cooling (60% - 50% = 10%) is handled by Unit 2. Unit 2
responds by operating at 20% cooling capacity (50% - 10% = 40%).
Figure 64 Teamwork Mode 1, serial staging
4.2.4 Teamwork Mode 2
Teamwork Mode 2 is designed to prevent units within a group from working in opposing modes, some
cooling and some heating. It is best applied in large rooms with unbalanced heat loads. In Teamwork
Mode 2, all temperature and humidity parameters are shared. Unit #1 monitors all of the available
unit sensor readings on the network to determine the greatest demand, whether it be for cooling,
heating, dehumidification or humidification.
For example, if most of the units connected in the group have a cooling request and a smaller number
For example, if most of the units connected in the group have a cooling request and a smaller number
have a call for heating, the units requesting cooling are released to start cooling. The units with a call
for reheat will not reheat, but will operate only their evaporator fans.
Teamwork Mode 2 does not rotate; unevenly distributed working hours are to be expected. Autoset
Teamwork Mode 2 does not rotate; unevenly distributed working hours are to be expected. Autoset
will not adjust the proportional band in this mode.
NOTE
In Teamwork Mode 2, all units must have the same setpoints. The units’ proportional band,
In Teamwork Mode 2, all units must have the same setpoints. The units’ proportional band,
deadband and related settings may differ.
C1
C2
cooling
+100 %
0%
1/2 Proportional Band
+temp.
Unit 2 Deviation : 20%
Setpoint
C1
C2
cooling
+100%
0%
1/2 Proportional Band
+temp.
Setpoint
0%
Setpoint
- temp.
-100 %
+temp.
1/2 Proportional Band
+100%
1/2 Proportional Band
heating
100 %
60%
0%
System Deviation : 60%
System proportional band
Unit 1 Deviation : 100%