Dwyer 530 - Manual (Page 2)

©Copyright 2014 Dwyer Instruments, Inc. Printed in U.S.A. 3/14 FR# 2C-440532-00 Rev.4
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 must be mounted on top
of a horizontal duct.
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 complete, 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
ш3-7/16 (87.31)
ш3/32 (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
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]