Install Manual

General Information
Automatic Transfer Switch Owner’s Manual 7
illuminate when a load is connected and powered.
See Figure 2-2. The controller has a test button (C) used
to simulate an overload condition. This button operates
even when the transfer signal is inactive.
Figure 2-2. PWRcell ATS Controller
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 and are wired in series with the 240V
branch circuit wiring between the circuit breaker and the
managed load.
Figure 2-3. Smart Management Module (SMM)
Application Considerations
An overload condition is determined by the PWRcell
inverter frequency while the inverter is in island mode.
Loads are managed and de-energized when frequency is
less than 58 Hz for three seconds or less than 50 Hz for
½ second (for 60 Hz systems).
The controller can be used in conjunction with individual
SMMs to manage a combined total of eight loads.
• The priority order determines the order in which
managed loads are re-energized by the load
management system after all of the managed loads
have been de-energized due to an overload
condition.
• Use Priorities A/C 1-4 on the controller as the top
priorities, then up to four SMMs as Priorities 5-8.
• Use only select A/C priorities on the controller 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 controller provided the standby power source 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.
A
B
C
011166
000106
Table 1. Priority Settings
Priority Recovery Time
PWRcell
ATS
Controller
SMM
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