Ce-niehoff-co A2-334/A2-335 Regulator Installation User Manual download pdf

II179A

Page 1 of 1

A2-334 & A2-335

Regulators

Installation Instructions

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 14.0 V

Position 2 14.4 V

Position 3 14.8 V

Position 4 15.5 V

Battery Type

Maintenance (D Category)

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:

• Mount A2-334 regulator on alternator in the

same position as the previous regulator. Use

screws and washers (if supplied). Torque

regulator mounting screws to 8.5 Nm/75 lb. in.

• Mount A2-335 regulator in remote location

specified by customer.

3. Plug the alternator-to-regulator harness into the

regulator.

4. Regulator connections:

• Connect IGN terminal to ignition source

through existing switch. Torque M5 terminal

nut on regulator to 4.5 Nm/40 lb. in.

• If required, 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.

A2-334 & A2-335 1
Regulators 1

Summary of Contents

Page 1 - Regulators

II179APage 1 of 1A2-334 & A2-335 Regulators Installation InstructionsC. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202

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