Specifications

11
tener torque on the tower mounting bolts. The
recommended torque is 54 N.m (40 ft-lbs).
Power
Cables
Nylon
Cable
Ties
Turbine
Mounting
Bolts
Figure 7, Turbine Mounting
Step 4:
Complete the turbine wiring to the PowerCenter
before adding the blades. This is recommended
so that you can test the DC polarity of the wiring
by spinning the alternator by hand. It is very im-
portant that the polarity [positive (+) and negative
(-)] is correct when the turbine is connected to the
PowerCenter. The best way to ensure this is to
complete the wiring and then test the polarity with
a Volt-Ohm-Meter or the polarity checker built into
the PowerCenter. Do not use the polarity checker
on the PowerCenter circuit board with blades on
and the turbine turning under wind power because
the voltage will be too high for the polarity check
circuitry.
To use the PowerCenter’s polarity check, first
connect the suspected negative wire to the ter-
minal marked “TUR - “, then touch the wind tur-
bine positive wire to the “POLARITY CHECK” pad
on the controller. The green LED should light
when the alternator is turned by hand. If it does,
connect the turbine positive wire to the “TUR +”
terminal. If the red LED lights, reverse the leads
and check again.
Wiring recommendations are provided in Section
7 and in Appendix 1, section D. Turning the alter-
nator by hand will provide enough voltage to make
this check. Carefully mark the positive and nega-
tive electrical leads for later reference.
We recommend that you connect the battery bank
to the PowerCenter at this point so that you can
use the Stop Mode to keep the blades from turn-
ing during the turbine and tower raising process.
To connect the battery leads, first connect the bat-
tery negative (-) wire to the terminal marked “BAT
–“. With the battery positive wire touch the pad
marked “POLARITY CHECK”, if red LED (D80)
lights, the connections are backward, double
check everything to find the cause. The green
LED (D70) should come on, if it does leave the
wire in contact with the “POLARITY CHECK” pad
for 5 seconds to charge all capacitors and avoid a
spark when making the battery connection.
Quickly connect the battery positive wire to the
terminal marked “BAT +”. The system will not
operate correctly and could be damaged if the
polarity is reversed.
See “PowerCenter Connections” beginning on
Page 14.
Step 5:
Bolt the tail fin to the tail boom using the eight M5
bolts and washers provided, as shown in Figure 8.
We recommend applying Loctite to the bolt
threads prior to assembly.
Figure 8, Tail Fin Attachment
Tail Fin Fasteners