Unit installation

22 OMRCPMICRO
Remote Demand Limiting
Demand limiting applies to ALR and WHR chillers only. Remote demand limiting may be accomplished by
connecting to terminals #131 and #132 on TB7. A 4-20mA signal is required. Based on the 4-20mA signal,
demand limiting will cause the chiller to limit the total number of stages regardless of the amount of cooling
actually required. A signal of 4mA or less allow all stages to operate while a 20mA or more will allow only one
stage to operate. The effect of the 4-20mA signal may be determined using Figures 8, 9 and 10. Under Menu
#18, demand limits, the number of stages allowed by demand limiting will be displayed as well as the actual
remote demand limit signal in milliamps.
Figure 8, Remote demand limit, 4-stage unit
Figure 9, Remote demand limit, 6-stage unit
Figure 10, Remote demand limit, 8-stage unit