Product Manual

General Information
Automatic Transfer Switch Owner’s Manual 7
See Figure 2-2. The SACM has a test button (C) used to
simulate an overload condition. This button operates
even when the transfer signal is inactive. The Generator
Control Wiring is connected to terminals (D).
Figure 2-2. Smart A/C Module (SACM)
Smart Management Module (SMM)
(sold separately)
Any loads, including central air conditioners, can be
managed using a Smart Management Module (SMM).
The system can accommodate up to eight individual
SMMs.
NOTE: SMMs are self-contained and have individual
built-in controllers.
Figure 2-3. Smart Management Module (SMM)
Application Considerations
Generator overload condition is determined by generator
frequency. Loads are shed when frequency is less than
58 Hz for three seconds or less than 50 Hz for ½ second
(for 60 Hz systems).
The SACM can be used in conjunction with individual
SMMs to manage a combined total of eight loads.
• Use Priorities A/C 1-4 on the SACM as the top
priorities, then up to four SMMs as Priorities 5-8.
• Use only select A/C priorities on the SACM as the top
priorities, then use additional SMMs as the remaining
priorities.
• A SMM can share a priority with an A/C priority on
the SACM provided the generator is sized to handle
the combined surge load from both appliances.
Sharing priorities can allow up to 12 loads to be
managed in a properly sized system.
In any combination of modules, the recovery times after a
loss of utility power or shutdown due to overload are
shown in Table 1: Priority Settings
.
Refer to the SMM Owner’s/Installation Manual for
detailed characteristics and specifications of that product.
004436
A
B
C
D
000106
Table 1. Priority Settings
Priority Recovery Time SACM SSMM
1 5 minutes Yes Yes
2 5 minutes 15 seconds Yes Yes
3 5 minutes 30 seconds Yes Yes
4 5 minutes 45 seconds Yes Yes
5 6 minutes NA Yes
6 6 minutes 15 seconds NA Yes
7 6 minutes 30 seconds NA Yes
8 6 minutes 45 seconds NA Yes