Dwyer Instruments 530 User manual

The Dwyer Model 530 Air Flow Switch provides excel-
lent sensitivity and reliability at a very reasonable price.
Quality features include rugged die cast zinc body,
stainless steel vane, silicone rubber gasket and SPDT
snap switch. Unit is easily field adjustable from 400-
1600 FPM. Mounting is fast and simple, requiring only
two screws. Vane fits 6 in. or larger ducts. UL approved.
To order, specify Dwyer Model 530 Air Flow Switch.
CAUTION: For use only with air or non-combustible,
non-corrosive gases. Unit is not sealed against dust.
Model 530 Air Flow Switch
Specifications - Installation and Operating Instructions
Bulletin E-65
DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]
SPECIFICATIONS
Service: Air and non-combustible gas flow.
Wetted Materials: Contact factory.
Vane: Stainless Steel.
Temperature Limit: 180°F (82°C).
Switch Type: SPDT.
Electrical Rating: 125 VAC - 9.8 amp full load 58.8
amp locked rotor. 250 VAC - 4.9 amp full load 29.4 amp
locked rotor. Pilot Rating: 470 VA at 125, 250 VAC.
Resistive: 15 amp at 125, 250, or 480 VAC.
Electrical Connections: Screw type terminal.
Conduit Connection: 7/8˝ conduit hole.
Mounting Orientation: Horizontal duct flow
Set Point Adjustment: Screw type.
Weight: 1 lb, 1 oz (481.94 g)
Patent No. 4,725,700
E-65 9/15/06 9:52 AM Page 1

Model 530 Air Flow Switch Bulletin E-65
©Copyright 2006 Dwyer Instruments, Inc. Printed in U.S.A. 9/06 FR# 2C-440532-00 Rev.2
DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]
Specifications - Installation and Operating Instructions
CAUTION: Vane edges are sharp. Use care when
handling.
INSTALLATION
1. Select a location in a horizontal duct at least 10 duct
diameters from fans and 7 diameters from elbows, size
changes, etc. which can cause turbulence. Also, avoid
areas with excess vibration or where the temperature
limits might be exceeded. Switch can be mounted in any
position.
2. Use vane as received for 8″(203 mm) or larger ducts.
Trim at notch for 6″(152 mm) ducts.
3. Cut a mounting hole and slot for the vane and drill two
3.32” (2.38 mm) screw holes as shown in the full size
drawing on the reverse side. Insert switch through slot
and rotate 90° so arrow on switch enclosure points in
direction of air flow. Attach switch to duct with sheet
metal screws provided.
4. To make electrical connections, loosen the retaining screw
and remove the conduit enclosure cover. The SPDT snap
switch has screw terminals marked common, normally open
and normally closed. A ground screw is also provided. On
increasing flow the normally open contacts will close and the
normally closed contacts will open as the set point is passed.
5. To adjust set point, turn the hex screw located near the
ground screw. Rotate clockwise to increase setting or
counter-clockwise to decrease.
6. After all electrical connections and adjustments are com-
plete, replace conduit enclosure cover.
MAINTENANCE
The only adjustment is that of the set point. Care should be
taken to keep switch dry and free of dust, dirt and oil. No
lubrication or routine maintenance is necessary in normal
service.
FLOW SWITCH
ø3-7/16 (87.31)
ø3/32 (2.38)
TYP 2 PLACES
ø1 (25.40)
2-7/16
(61.91)
1/8
(3.18)
TYP
2-7/8
(73.03)
AIR
FLOW
Full Size Mounting Template
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