C.E. Niehoff & Co. A9-4011 Instructions

A9-4011 Temperature Sense Lead

Installation Instructions

1. To install A9-4011 temperature sense lead, see
Figure 1:
a) Connect twin lead ends of A9-4011 tempera­ ture sense lead:

• one to regulator T terminal, using hard­ ware furnished, torque terminal nut to

4.5 Nm/40 lb. in.

• the other to one mounting bolt. Retorque
to 8.5 Nm/75 lb. in.

b) Connect single sense lead ring terminal to

B– terminal on battery as shown in Figure 1.
Tighten hardware securely.

c) Coil up any unused sense lead and use cable

ties every 12-14 inches to securely support
temperature sense lead between regulator
and battery.

2. When the A9-4011 temperature sense lead is not
in use, the regulator will operate at 27.5 V.

3. When A9-4011 temperature sense lead is in use,
the lead senses the ambient temperature within
the battery box and regulator will adjust charge
voltage based on battery temperature—the higher
the battery temperature, the lower the charge
voltage.

Connect to B– terminal on battery

A9-401 1 Temperature
sense lead

T terminal – torque M6 nut

to 4.5 Nm/40 lb. in.

Figure 1 – A9-4011 Temperature Sense Lead

C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline [phone]

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