C.E. Niehoff & Co. A2-213/A2-214 Regulator Installation - Manual

II0103B Page 1 of 1
A2-213 and A2-214
Regulators
C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633
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 (D Category)
Maintenance-Free (Group 31)
Maintenance-Free (Group 31)
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. Before installing, turn regulator over and select
appropriate voltage setpoint for battery type
(See Table 1 and Fig. 1).
2. Install new regulator as described below:
a. Mount new regulator on alternator in the same
position as the previous regulator.
b. Use screws and washers (if supplied),
2 or 4 depending on number of original
mounting holes in alternator. Torque regulator
mounting screws to 8.5 Nm/75 lb. in.
3. Plug the alternator-to-regulator harness into the
regulator.
4. A2-214 regulator connections:
• Connect IGN terminal to ignition source
through existing switch. Torque M5 terminal
nut on regulator to 4.5 Nm/40 lb. in.
• D+ terminal provides 28 VDC sense voltage
to multiplex controller. When connecting D+
terminal to controller through a relay, the
relay coil must be diode protected and rated
for proper voltage. Torque M6 terminal nut
on regulator to 4.5 Nm/40 lb. in.
• Connect P terminal to tachometer or relay.
P terminal taps AC voltage, typically half
the charge voltage. Torque M6 terminal nut
on regulator to 4.5 Nm/40 lb. in.
NOTE: If you are replacing an A2-211 regula-
tor with an A2-214 regulator, the existing R
terminal lead should now be connected to
the P terminal on the new A2-214 regulator.
See step above for details.
Installation Instructions
1
2 3
4
5. A2-213 regulator connections:
• Connect IGN terminal to ignition source
through existing switch. Torque M5 terminal
nut on regulator to 4.5 Nm/40 lb. in.
• D+ terminal provides 28 VDC sense voltage
to multiplex controller. When connecting D+
terminal to controller through a relay, the
relay coil must be diode protected and rated
for proper voltage. Torque M6 terminal nut
on regulator to 4.5 Nm/40 lb. in.
• Connect P terminal to tachometer or relay.
P terminal taps AC voltage, typically half
the charge voltage. Torque M6 terminal nut
on regulator to 4.5 Nm/40 lb. in.
Note: If you are replacing an A2-205 regulator with
an A2-213 regulator, make sure you connect the
existing R terminal lead to the P terminal on the
A2-213. The remaining D+ terminal on the A2-213
will not have a connecting cable.
If you are replacing an A2-207 regulator with an
A2-213 regulator, make sure your connect the
existing D+ terminal lead to the D+ terminal on
the A2-213. The remaining P terminal on the
A2-213 will not have a connecting cable.
6. LED operation modes:
• Green lens LED will light STEADY when
regulator is energized and functioning properly.
• Green lens LED will FLASH once every five
seconds when regulator is energized and engine
is not running.
• Green lens LED will not be lit when regulator
is not energized.