SubDrive Duplex Alternator
SubDrive Duplex Alternator
SubDrive Duplex Alternator
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Wiring Connections<br />
<strong>SubDrive</strong> <strong>Duplex</strong> <strong>Alternator</strong><br />
1. Verify that the power has been shut off at the main breaker.<br />
2. Open the cover to the <strong>Alternator</strong>.<br />
3. Drive Connections<br />
Connect a two-conductor pressure sensor cable from Drive 1 to the<br />
<strong>Alternator</strong>’s terminal block labeled SD1 on the right side. The red and<br />
black wire connections are interchangeable. (See Figure 2 below).<br />
Whichever Drive unit is connected to the SD1 terminal will be the primary<br />
system fi rst. The Drive unit connected to the SD2 terminal will be the<br />
backup system fi rst.<br />
A. If connecting to a <strong>SubDrive</strong>300, use the supplied two-conductor<br />
pressure sensor cable. Cut the terminals off both ends of the red<br />
and black leads from the existing four-conductor cable. Leave<br />
only the Green and White leads linking the pressure shut-off<br />
switch to its connections on the <strong>SubDrive</strong>300.<br />
B. For all other <strong>SubDrive</strong>s, cut off the quick connect ends and strip<br />
the wire to make a two-conductor cable with stripped leads at<br />
both ends.<br />
4. Repeat step 3 for Drive 2, but connect Drive 2’s pressure sensor cable to<br />
the <strong>Alternator</strong>’s terminal block labeled SD2 on the right side.<br />
Figure 2: Drive Sensor Cable Connections<br />
<strong>SubDrive</strong>300<br />
<strong>Alternator</strong><br />
1 2 1 2<br />
1 2 1 2<br />
PS-HI PS-LO SD1 SD2<br />
PRESSURE 12 VAC<br />
DRIVES<br />
ALARM SENSORS<br />
24V-1A<br />
(A)<br />
PRESSURE<br />
SENSOR SHUT-OFF<br />
To Pressure Shut-off Switch<br />
INT<br />
FAN<br />
NO<br />
RELAY<br />
PFC INV<br />
FAN FAN<br />
PRESSURE<br />
SENSOR SHUT-OFF<br />
PFC<br />
FAN<br />
INT<br />
FAN<br />
(Cut black and red wires; leave only<br />
the green and white connected to<br />
the pressure shut-off switch.)<br />
1 2 1 2<br />
1 2 1 2<br />
PS-HI PS-LO SD1 SD2<br />
PRESSURE 12 VAC<br />
DRIVES<br />
ALARM SENSORS<br />
24V-1A<br />
Note: If using a NEMA 4 <strong>SubDrive</strong>150 or <strong>SubDrive</strong>75 the quick connects or<br />
stripped leads may be used.<br />
(B)<br />
1 2<br />
<strong>SubDrive</strong><br />
10
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