Dwyer Series H2 User manual

Dwyer Series H2 User manual
Bulletin F-64
Series H2 Dual-Action Explosion-Proof Pressure Switches
®
Specifications - Installation and Operating Instructions
3-3/8
[85.73]
Ø2-5/8
[66.68]
3/4 NPT ELECTRICAL
CONNECTION
5
[127.00]
2-15/16
[74.63]
1/4 NPT PRESSURE CONNECTION
Accurate, dependable long-lived operation results from the built-in quality of Duotect®
pressure switches. They are designed for ­sequencing work where two different actions
are to be triggered, as pressure of a liquid or gas increases or decreases. This permits
control and protection of many types of equipment and systems subject to pressure
variations. The patented design consists of two pistons in a concentric arrangement,
operated by a single diaphragm with one pressure chamber. Each piston actuates a
separate switch independent of the other. The switches may be adjusted to operate
together, or at opposite ends of the range, or at any two intermediate setpoints. They
can be easily field adjusted. For quick maintenance, the threaded top is removed to
adjust or service switches without disturbing electrical or pressure connections. The
controls are UL and CSA Listed as Explosion Proof, Class I, Groups B, C, D. Class II
groups E, F & G, and weatherproof NEMA-4.
Expanded Listings. Consult factory for models that are UL Listed (not CSA) Explosionproof Class I, Groups A, B, C, & D; Class II, Groups E, F, & G; Weatherproof, NEMA4X. Contacts rated 10 amp @ 125/250 VAC, 5 amps @ 30 VDC.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
SPECIFICATIONS
Wetted Materials: See model chart on next page.
Temperature Limit: 275°F (135°C). CSA approved -20 to 90°C (-4 to 184°F).
Pressure Limit: 1500 psig (103 bar).
Enclosure Rating: UL listed explosion-proof, Class I, Groups B, C, and D. Class
II Groups E, F, and G. Meets NEMA 4X (IP65). CSA optional. Class I, Groups B, C
& D. Class II, Groups E, F, & G -20°C ≤ Tamb ≤ 75°C T6 [optional -20°C ≤ Tamb ≤
40°C T5] Type 4.
Switch Type: One or two SPDT snap switches.
Electrical Rating: 5A @ 125/250 VAC. 5A res., 3A ind. @ 30 VDC. MV option: 1A
@ 125 VAC, 1A res. or .5A ind. @ 30 VDC.
Electrical Connections: 18 AWG, 18˝ (460 mm) long.
Conduit Connection: 3/4˝ female NPT.
Process Connection: 1/4˝ female NPT.
Mounting Orientation: Any position.
Set Point Adjustment: Internal nut.
Weight: 2 lb (0.9 kg).
Deadband: Approximately 10% of range.
Phone: 219/879-8000
www.dwyer-inst.com
Fax: 219/872-9057
e-mail: [email protected]
MODEL CHART
Example
H2 S 2
MV
H2S-2-MV weatherproof and explosion-proof
pressure control; 316SS chamber with FEB
diaphragm and Buna-N O-rings, dual switch,
adjustable range; low: 25-250 psig (1.72-17.2
bar), high: 30-400 psig (2.07-27.6 bar), gold
contact snap switch for dry circuits.
Construction H2
Series designator, weatherproof and
explosion-proof
Wetted
A
Aluminum chamber with Mylar diaphragm and
Material
Buna-N O-rings
Options
S
316SS chamber with FEB diaphragm and BunaNO-rings
Dual switch, adjustable range; low: 3-40 psig
Adjustable
1
(0.21-2.76 bar), high: 5-75 psig (0.35-5.17 bar)
Operating
Single switch, adjustable range 3-75 psig
Range
1S
(0.21-5.17 bar)
2
Dual switch, adjustable range; low: 25-250 psig
(1.72-17.2 bar), high: 30-400 psig (2.07-27.6 bar)
2S
Single switch, adjustable range 25-400 psig
(1.72-27.6 bar)
3
Dual switch, adjustable range; low: 100-1000
psig (6.89-68.9 bar), high: 150-1500 psig (10.3103 bar)
3S
Single switch, adjustable range 100-1500 psig
(6.89-103 bar)
Options
CSA CSA approved construction
MV
Gold contact snap switch for dry circuits
VIT
Fluorocarbon O-rings
EPDM EPDM O-rings
FEB
FEB diaphragm option where not standard
PRESSURE ADJUSTMENT PROCEDURE
The #1 pressure adjustment (see Figure 1) is for the high range of the switch. The #2
adjustment is for the low range. Due to the configuration of the concentric pistons, the
#1 setting must always be the higher of the two.
To adjust the switch, connect it to a source of controlled pressure such as a hand pump
or a regulated fluid supply.
1. Set the high range switch #1 by screwing the elastic stop nut up or down as
required to obtain switch actuation at the desired pressure. Be sure to set the
switch with the pressure moving in the proper direction: that is, switch actuation
on an increasing pressure or on a decreasing pressure as required by the
application.
2. Set the low range switch #2 in the same manner.
Note: The 4-40 micro switch adjustment screws are factory set and should not be
changed.
WARRANTY
We guarantee our products to be free from defects in workmanship or material, and
will, without charge, at our option, replace or repair within one year from date of
shipment from our factory any product that may be found defective upon inspection
at our factory. Product to be returned transportation charges prepaid. This guarantee
does not obligate us where product has been subject to careless handling, improper
application or faulty installation, and we expressly disclaim any obligation, guaranty or
liability whatsoever except as above stated.
Set Point Adjustment
INSTALLATION
1. Connect pressure switch to supply pressure. (1/4˝ female NPT connection.)
NO. 2
PRESSURE
ADJUSTMENT
NO. 1
PRESSURE
ADJUSTMENT
2. Run connecting wires through external conduit and connect. (3/4˝ NPT
connection).
EXTRA LONGLIFE CHROME
VANADIUM
SPRINGS
3. Color coding legend is as follows:
Black: Common
Red: Normally Closed with no pressure in the system.
Blue: Normally Open with no pressure in the system.
4. The individual wires are tagged as follows:
CO1 - Common for #1 Pressure Adjustment.
(High Range).
NC1 - Normally Closed for #1 Pressure Adjustment.
(High Range).
NO1 - Normally Open for #1 Pressure Adjustment.
(High Range).
CO2 - Common for #2 Pressure Adjustment.
(Low Range).
NC2 - Normally Closed for #2 Pressure Adjustment.
(Low Range).
NO2 - Normally Open for #2 Pressure Adjustment.
(Low Range).
©Copyright 2017 Dwyer Instruments, Inc.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
EXPLOSIONPROOF
ALUMINUM
HOUSING
1/4˝ FEMALE
NPT PIPE
CONNECTION
(UNDERSIDE)
Figure 1
Printed in U.S.A. 12/17
PRE-WIRED
18 GAUGE
LEADS
18˝ (460 MM)
LONG
FR# 440827-00 Rev. 5
Phone: 219/879-8000
www.dwyer-inst.com
Fax: 219/872-9057
e-mail: [email protected]
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