KB Electronics KBSC-24FK User Manual

INSTRUCTIONS FOR INSTALLING KBSC SPEED CONTROL

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CONNECTION DIAGRAM FOR 2-WIRE CONTROLS (SWITCH MODELS)

TRIAC

SWITCH

C

ONTROLLED

L

OAD

AC

LINE

CONNECTION DIAGRAM FOR NO SWITCH MODEL (NS) 2-WIRE CONTROLS

AC

LINE

CONTROLLED

LOAD

MOTOR CONTROL

3/8d

PANEL DRILLING TEMPLATE

17/16 sq

15/16

5/8

SAFETY WARNING! Please read carefully before proceeding

Unit should be installed by a qualified electrician in accordance with the national electrical code and other local codes which may apply. This
control must be grounded when installed. Failure to follow these instructions may result in electrical shock or a fire hazard. To reduce the risk of
fire or electric shock, this control is to be used only with fans marked as suitable for use with solid state state speed controls. This control is suit­able for mounting a metal or polymetric field enclosure. These controls must not be used at ratings exceeding those clearly marked on the device.

We are not responsible for any expense, inconvenience or consequent damage caused by items of our manufacture or sale.

1. APPLICATION

a) Motor Type – Shaded Pole, P.S.C., and Universal.

) Required Load – Fans, Blowers and speed dependent

b

loads.

2. WIRING

Warning! – Power must be turned off before wiring.
Connect control in series with motor and line voltage –
never connect control across line.

3. MOUNTING

a) Drill 3/8” hole using mounting template below.

b) Lock washer may be used to prevent unit from rotating.

c) Dial Plate may be secured with bushing lock nut or self-

adhesive backing

4. MINIMUM SPEED ADJUSTMENT

Important – If this option is not supplied, disregard step 4
and continue to step 5.

This control was designed to operate on motors used in
diversified applications. A minimum speed adjustment is
provided to allow independent control of the minimum
speed setting.

a) Motor must be in actual operating conditions to achieve

proper speed adjustment. (Motor will not slow down
unless proper load is applied.)

b) Turn main speed control knob clockwise to lowest speed

position.

c) Locate and adjust minimum speed setting on the side of

the control with an insulated screw driver (rotate clock­wise to decrease minimum speed; counter-clockwise to
increase minimum speed.

d) Motor will now operate from this preset minimum speed

to full speed.

5. FINAL MOUNTING – SWITCH MODELS

a) Install front dial plate (remove protective plastic on face

of dial plate).

b) Turn main control until switch snaps off.

c) Push on knob so that pointer is on the “off” position.

MOUNTING NOTE – For No Switch Models (NS) install

front dial plate and push on knob.

KB ELECTRONICS, INC.

12095 NW 39th Street, Coral Springs, FL 33065-2516 • [phone] • Fax [phone]
Outside Florida Call Toll Free [phone] • E-mail – [e-mail]
www.kbelectronics.com

(A40005) – Rev. B – 6/2001