Manual

This control is operated by a negative-rate Bellville spring-augmented
diaphragm.
Location and Mounting
Select a location recommended by the equipment manufacturer. Use
the four (4) lugs on the case to mount the control on a panel or smooth
wall surface, or mount directly by the pressure connection.
The control is not position-sensitive and may be mounted in any position.
However, vertical is preferred when there is a possibility of sludge accu-
mulation or condensed water freezing in the pressure chamber.
Pressure Connection
The pressure connection is a standard female 1/4˝ NPT taper pipe
thread. Pipe thread sealant tape or pipe thread sealant should be used
to assure a pressure-tight joint.
Wiring
A 3/4˝ conduit connection is provided for wiring. Wire in accordance with
local electrical codes or equipment manufacturer’s instructions. Use a
short piece of BX between rigid conduit and control so that control will
not be subject to the stress of conduit expansion and contraction.
Electrical ratings are shown on the label.
DO NOT OVERLOAD
Setting Operating Point
Remove the transparent cover over the adjusting wheel. Move the
wheel by hand to the desired pressure on the vertical scale. If the
adjusting wheel is difficult to move, a small screwdriver inserted in the
adjusting wheel arms will provide extra leverage. A stop is provided at
the top and bottom of the scale to prevent setting beyond the control’s
range. Dial markings are for the High operating point. Switch will reset
at a lower pressure. Dial markings are a guide for setting. Actual set-
ting should be checked with a good pressure gage.
Warning: A failure resulting in injury or damage may be caused by over-
pressures, excessive vibration or pressure pulsation, excessive temper-
ature, corrosion of pressure-containing parts and movement assembly,
electrical overload or other misuse.
Series 1000W Diaphragm Operated Pressure Switches
Installation and Operating Instructions
Bulletin IN-1001
2.725
[69.22]
1.725
[43.82]
1.350
[
34.29]
1/4 NPT
2.687
[68.25]
4.500
[114.3]
7
.269
[184.63]
3.750
[95.25]
.
625 [15.88]
2.094
[53.19]
5.000 [127.00]
Ø.265
[6.73]
A
DJUSTING
WHEEL
3/4 NPT CONDUIT
CONNECTION
1.913
[48.59]
3.825 [97.16]
MERCOID DIVISION
DWYER INSTRUMENTS, INC.
P.O. BOX 258 • MICHIGAN CITY, INDIANA 46360 U.S.A.
Phone: [phone] www.dwyer-inst.com
Fax: [phone] e-mail: [e-mail]
SPECIFICATIONS
Wetted Materials: Aluminum pressure chamber with polyimide
diaphragm or 316 SS pressure chamber with FEP diaphragm.
Temperature Limits: -30 to 170°F (-35 to 77°C).
Pressure Limit: 3000 psig (206.8 bar).
Enclosure Rating: Weatherproof, meets NEMA 4X.
Switch Type: SPDT snap switch.
Electrical Rating: 15A @ 125/250 VAC resistive.
Wiring Connections: Screw type.
Conduit Connection: 3/4˝ female NPT.
Process Connection: 1/4˝ female NPT.
Mounting Orientation: Any position.
Set Point Adjustment: Internal thumbwheel.
Weight: 3 lb (1.4 kg).
Deadband: See chart
Agency Approvals: CE, UL.
Note: When used on steam, a pigtail siphon and Type 3 (FEP)
diaphragm should be used. Maximum case ambient temperature: 170°
F (76.7° C).