Full Product Manual

Installation, Tests and Troubleshooting
8 Owner’s/Installation Manual for SMM
Connections
Figure 3 -3. Wiring Diagram
1. Turn OFF both UTILITY (NORMAL) and EMERGENCY
(STANDBY) power supplies before connecting power
source and load lines to transfer switch and SMM.
NOTE: Suitable conduit fittings must be installed in knockout
openings when running supply and load wires.
NOTE: Use at least 75 ºC rated wire and gauge per installa-
tion instructions. Refer to table for recommended wire size
based on load current.
2. Run line supply wires per applicable NEC code articles
for wiring method selected.
3. Run load wires per applicable NEC code articles for
wiring method selected.
4. Connect line supply wiring to line side of SMM contactor
field terminals. See Figure 3-2. Tighten field terminals to
25 in-lbs (2.8 Nm).
5. Connect load supply wiring to load side of SMM
contactor field terminals. See Figure 3-2.
NOTE: If neutral and ground wires are included, connect
inside SMM using a listed termination device.
The unit is now ready to apply power and perform testing.
Setting Priorities
High priority 240 VAC loads should be set to the highest
priorities so those loads recover first, in the event of generator
overload.
NOTE: The highest priority, and first load to activate is Priority 1.
The last load to activate is Priority 8.
Setting priority determines timing for 3 scenarios:
• Order in which loads recover
• Delay time until power returns during an outage
• Delay time for post load shed recovery
An example configuration is shown below. Configurations will
vary depending on customer prioritization of loads:
Priority 1 - Baseboard heat
Priority 2 - Air conditioner
Priority 3 - Range
Priority 4 - Dryer
Priority 5 - Non-essential circuits
Priority 6 - Pool pump or hot tub
Priority 7 - Other circuits
Priority 8 - Other circuits
1. Set the priority of each SMM module as desired (using
the example configuration for reference).
2. Apply priority decal in a suitable location on electrical
panel to record chosen priority designations.
3. Record priorities on decal.
Setting Lockout
Most installations will require the lockout switch will be
DISABLED. When performing a whole house backup with a
generator not sized to manage all household loads, SMM's can
be used to disable appliances or circuits during an outage. For
non-essential loads that will not be used on generator power,
set lockout switch to ENABLED.
Tests
Utility Test
1. Turn utility power ON and enable all module feeding
circuits.
2. Verify LED begins to flash at one second intervals.
3. All contactors will close after five minutes. LED will
illuminate, and stay ON.
4. Wait 30 seconds after contactor closes, then press TEST
button and verify module load shed. LED will flash at one
second intervals.
5. Wait five minutes, plus predefined priority set time for
module to recover.
6. Contactor will CLOSE and LED will illuminate, and stay
ON.
Legend
A Red (240 VAC - Line)
B Black (240 VAC - Line)
C Red (240 VAC - Load)
D Black (240 VAC - Load)
E White - Neutral (as required)
F Green - Ground (as required)
G Black - Factory (PCB)
H Red - Factory (PCB)
I Blue - Factory (PCB)
J Blue - Factory (Jumper)
Temperature rating of conductor: 75 ºC (167 ºF)
Conductor types (must be copper): RHW, THHW, THW,
THWN, XHHW, USE, ZW
Size AWG Maximum Current Rating
14 20A
12 25A
10 35A
8 50A
000108
A
B
E
F
C
D
I
H
G
J
(000116)
DANGER
Electrocution. Turn utility and emergency
power supplies to OFF before connecting power
source and load lines. Failure to do so will result
in death or serious injury.