Blue Sky Solar Boost 3024iL DUO-Option - Manual (Page 2)

Page 2 of 4
Microprocessor installation (required for field upgrade only)
¾ WARNING: The microprocessor or 3024 may be damaged by static electricity. Observe industry
standard electrostatic handling precautions. At a minimum discharge yourself by touching grounded
metal prior to handling the microprocessor or touching circuits in the 3024. Touch the “BAT-” terminal in
the 3024 just prior to removing the old microprocessor or inserting the new microprocessor. The risk of
electrostatic damage increases greatly if relative humidity is below 40%.
The Microprocessor must be inserted in the proper Pin-1 orientation and all pins must be properly
seated into the socket.
1. Remove all sources of power, battery and PV.
2. Carefully remove the old microprocessor with a suitable tool. Take care
not to damage the microprocessor socket or other components.
3. Carefully place the new microprocessor p/n 590-0009-01 onto the
socket, but do not press into place. Confirm that the Pin-1 end of the
microprocessor is in the proper orientation closest to the case wall and
that all pins are properly placed into the socket.
4. With one finger on each end of the microprocessor, carefully and
evenly press the microprocessor to fully seat it into the socket. Confirm
all pins are properly seated into the socket with no bent pins, and again
confirm Pin-1 orientation.
5. Reapply battery power. Confirm that the microprocessor operates by
viewing the charge voltage setting value (V
CHG
) as described in the
3024 manual.
Dump Load selection and installation
¾ WARNING: Over current protection for the 3024’s auxiliary output must be provided externally. To
reduce the risk of fire, connect the auxiliary output to 25 ampere maximum over current protection in
accordance with National Electrical Code, ANSI/NFPA 70. Do not connect the auxiliary output to a dump
load capable of drawing more than 20 amperes at the highest battery charge voltage. For dump load
current up to 40 amperes use current booster module part number CBM4070. Over current protection for
CBM4070 must be provided externally. To reduce the risk of fire, connect CBM4070 to 50 ampere
maximum over current protection in accordance with National Electrical Code, ANSI/NFPA 70. Do not
connect CBM4070 to a dump load capable of drawing more than 40 amperes the highest battery charge
voltage. Install and wire the dump load in accordance with the dump load manufacturer’s installation and
safety instructions and National Electrical Code, ANSI/NFPA 70. For dump load wiring clarity these
instructions omit standard 3024 installation. These instructions show generalized connections only and are
not intended to show all wiring, circuit protection and safety requirements.
For proper battery voltage control the dump load resistor value should be just low enough consume full generator current, but not so
low as to exceed the maximum current ratings of the 3024’s auxiliary output or the CBM4070. Since any charging source that drives
battery voltage up to or above the 3024’s charge voltage setpoint will cause current to be delivered to the dump toad, care must be
taken in the selection of both the 3024’s charge voltage setpoints and the charge voltage setpoints of other charging sources. To
prevent the Diversion control system from diverting current to the dump load from other charging sources such as an AC powered
charger or engine driven alternator, the 3024’s charge voltage setpoint must ALWAYS be greater than the voltage applied by these
other chargers. This may necessitate eliminating the 3024’s lower voltage Float charge stage by setting the 3024 for 2-stage charge.
Minimum dump load resistor value may calculated as follows:
R
DUMP-MIN
= V
BAT-MAX
÷ I
DUMP-MAX
Where: R
DUMP-MIN
= Minimum value of dump load resistor in Ohms (
Ω)
V
BAT-MAX
= Maximum expected battery charge voltage in Volts (V)
I
DUMP-MAX
= Maximum dump load current in Amperes (A)
Confirm that each pin is
properly placed into
socket prior to pressing
microprocessor into
place.
Place Microprocessor
into socket with Pin 1
orientation where shown.