Installation User guide

II0111B
Page 1 of 1
Extended Wiring Harness with
Metri-Pack® Connectors (5-Pin)
for Remote-Mounted Commercial Regulators
Installation Instructions
C. E. Niehoff & Co
.
BRUSHLESS ALTERNATORS
Mating connector included
with harness
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Harness includes 20 A slow-blow
fuse (Bussman MDA20 or equiv.)
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1. When required, install adapter plate CEN Part No. A9-490 at remote location as indicated by bus
manufacturer.
2. Before installing regulator, make sure setpoint switch on back of regulator is set for appropriate battery
type. See Table 1 and Figure 1. Then install regulator on adapter plate.
3. Connect extended wiring harness between regulator and alternator. Make sure harness plugs are securely
connected to regulator and alternator sockets.
4. When connecting orange REG/IGN wire and red NO-CHARGE wire from vehicle harness into mating 2-pin
connector, crimp and solder the connections and make sure pins are secured tightly in connector body.
5. Connect green wire to regulator IGN terminal and white wire to regulator D+ terminal.
6, Using cable ties every 12-14 inches, securely support wiring harness between alternator and regulator.
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Step 4: Orange wire from REG/IGN source to pin A
in 2-pin connector
Step 4: Red wire to NO-CHARGE input into pin B in
2-pin connector
Step 5: White wire from pin B
(D+ Multiplex input)
in 2-pin connector
to D+ terminal on regulator—
torque to 3.4 Nm/30 lb. in.
Step 5: Green wire from
pin A (IGN source)
in 2-pin connector
to IGN terminal on regulator—
torque to 3.4 Nm/30 lb. in.
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Extended
Wiring Harness
4 places—1/4-20 screws and
lockwashers (provided) torque
to 8.5 Nm/75 lb. in.
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4 places—#10-32 screws
torque to 8.5 Nm/75 lb. in.
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Figure 2 – Remote-Mounted Commercial Regulator with Extended Alternator Wiring Harness
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P terminal
Diagnostic LED
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C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline [phone]
Table 1 – Voltage Select Switch Position
4 Voltage Setpoints (Fig. 1)
Position 1 27.5 V
Position 2 28.0 V
Position 3 28.5 V
Position 4 29.0 V
Battery Type
Maintenance
Maintenance-Free
Maintenance-Free
Battery Isolator setpoint
Note: On Group 31 batteries, if boiling or excessive gassing occurs with high voltage
setpoint (position 3), change to medium voltage setpoint (position 2).
Figure 1 – 4 Voltage Setpoints
1
2
3
4