Dwyer instruments, inc – Dwyer AVFS User Manual

Page 2

Adjustment

MAINTENANCE
Upon final installation of the Series AVFS Air Flow Switch, no routine maintenance
is required. The Series AVFS is not field serviceable and should be returned if
repair is needed (field repair should not be attempted and may void warranty). Be
sure to include a brief description of the problem plus any relevant application
notes. Contact customer service to receive a return goods authorization number
before shipping.

Wiring

AVFS-01

Wire colors
BN

brown

blue

black

white

Note: Miniature fuse to IEC60127-2 sheet 1,
≤ 5 A (fast acting)

AVFS-02

Wire colors
BN

brown

blue

black

white

• Apply the operating voltage.
• Switch on the flow (preset value) and keep it constant.
→ Both LEDs (red and green) light; after approx. 60 s one LED goes off.
If the red LED lights:
• turn the pot slowly clockwise

until the red LED
goes off and the green
LED comes on.

If the green LED lights:
• turn the pot slowly counterclockwise until the

green LED goes off and the red LED comes on.

• Turn the pot again slowly clockwise until the

green LED comes on.

If fluctuations as a result of the operating conditions are to be compensated for:
• turn the pot further clockwise after the green LED has lit.

After application of the supply voltage both LEDs light for about 60 s, the output
relay is energized (power-on delay time). The unit then is ready for operation.

Printed in U.S.A. 7/10

FR# R1-443803-00

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000

www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A.

Fax: 219/872-9057

e-mail: [email protected]

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