C.E. Niehoff & Co. 200 & 300: Regulator Upgrade Installation - Manual (Page 2)

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C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633
200 Series – A1-200, A1-201, A1-202
N1025, N1026, N1031, N1036, N1037, N1077, N1079,
N1080, N1085, N3036, N7024, N7031, N7040
1. Remove end housing assembly, voltage adjust-
ment cover, screw, and voltage adjustor insula-
tor.
2. Using the third hole as the pilot hole, drill a
9/16” hole.
3. Deburr new hole to prevent damaging new
switch on new circuit board.
4. Install new circuit board and wire per
Figure 4.
Figure 3 - Series 200 Cover Assembly
“R” Lead
(brown wire)
Figure 4 - Series 200 Wiring
“Y” Lead
(brown wire)
Field Lead
(white wire)
Output Lead
(red wire)
GROUND
(white wire)
Voltage Select Switch Position
A2-434 Reg. A2-435 Reg.
Position 1—13.8 V Position 1—27.6 V
Position 2—14.2 V Position 2—28.0 V
Position 3—14.6 V Position 3—28.5 V
Position 4—14.6 V Position 4—29.0 V