Dwyer 1900 Serie Instrucciones De Montaje Y Operación

Series 1900 Pressure Switch
Specifications - Installation and Operating Instructions
Series 1910 pressure switch. All
pressure and electrical connections
and set point adjustments are on one
side for easy installation.
Advanced design and precision construction permit these switches to perform
many of the tasks of larger, costlier units. Designed for air conditioning service, they
also serve many fluidics, refrigeration, oven and dryer applications. For use with air
and non-combustible gases. Series 1900 switches are available with set points of
0.07 to 20 inches water column. Set point adjustment can be made easily - before or
after installation. Range screw is inside conduit enclosure to help prevent tampering.
For easy mounting and access, pressure and electrical connections and set point
adjustment are located on one side. This permits installation in corners or spaces too
small for other switches.
SPECIAL MODELS & ACCESSORIES
Special close coupled street elbow for right angle pressure connections. Can be
installed on switch anytime. Zinc plated aluminum.
Weatherproof Housing
16 ga. steel enclosure with
gasketed cover (NEMA 4)
[22.23]
for wet or oily conditions.
Withstands 200 hour salt
spray test. Wt. 5 Ibs. (2.3
kg). Switch must be factory
installed. Change 1910 base
number to 1911 and add -WP
3/4
[19.05]
suffix. Example: 1911-1-WP.
4-3/4
[120.65]
4-1/4
Explosion-Proof Housing
[107.95]
NEMA 7, 9 NEMA 3. (7
4X Ø.281 [7.14]
lbs). Switch must be factory
[146.05]
installed. Change model to
1911 and add -EXPL suffix.
Example: 1911-1-EXPL.
Aluminum base and cover
rated Class I, Groups C & D,
Div. 1. Class II, Groups E, F,
1/8 FEMALE NPT
HIGH PRESSURE CONNECTION
& G, Div. 1.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Series 1910 switch with conduit
enclosure off. Shows electric switch
and set point adjustment screw.
WEATHERPROOF ELECTRIC
CONNECTION HUB
4 [101.6] SQ.
1/29 NPT FEMALE
7/8
(4) 5-16 [7.94] DIA.
MTG. HOLES
NC
3/4 [19.05]
1-1/4 [31.75]
3 [76.2]
5-1/2
3-1/8 [79.38]
HIGH PRESS. LOW PRESS.
[139.7]
CONN. 1/8 N.P.T. CONN. 1/8 N.P.T.
2-3/4
1/8 NPT HIGH PRESSURE CONN.
[69.85]
TAPPED FOR
6-1/2 [165.10]
1/2 ELECTRICAL
CLEARANCE FOR 1/2 NPT PROCESS
CONDUIT CONN.
COVER REMOVAL
CONNECTION
5-3/4
4-1/4
[107.95]
2X 4-1/4
1/16 4-5/16 [10.54]
[107.95]
5-3/4
[1.59] 5-13/32 [137.32]
1/8 NPT LOW 2X 6-1/8
[146.05]
[155.58]
PRESSURE CONN.
1/8 FEMALE NPT
LOW PRESSURE CONNECTION
3 [76.20]
6-5/8 [168.28]
41/64 Ø7/8 [22.23]
[16.27] CONDUIT
1-19/32
[40.48] CONNECTION
2-11/32
1-3/4 [44.45]
[59.53]
CLEARANCE
FOR COVER
REMOVAL
The Dwyer-engineered force-motion amplifier increases the leverage of
diaphragm movement and results in a switch with excellent sensitivity and
repeatability.
SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Environment: Standard model intended for indoor use.
Wetted Materials: Consult factory.
Temperature Limits: -30 to 180°F (-34 to 82.2°C) (32°F for non dry air).
Pressure Limits: 45˝ w.c. (11.2 kPa) continuous, 10 psig (68.95 kPa) surge.
Humidity Limit: 80% RH (non-condensing).
Altitude Limit: 6560 ft (2000 m) max.
Switch Type: Single-pole double-throw (SPDT).
Repeatability: ±3%.
Electrical Rating: 15 A @ 120-480 VAC (~), 60 Hz. Resistive 1/8 HP @125
VAC(~), 1/4 HP @ 250 VAC(~), 60 Hz. Derate to 10 A for operation at high cycle
rates.
Electrical Connections: 3 screw type, common, normally open and normally
closed.
Installation Category: III (transient over-voltage).
Process Connections: 1/8˝ female NPT.
1-1/8 Mounting Orientation: Diaphragm in vertical position. Consult factory for other
[28.58]
position orientations.
Set Point Adjustment: Screw type inside conduit enclosure.
NO
Pollution Degree: 2.
Weight: 1lb. 4.5 oz. (581 g).
Agency Approvals: CE, UL, CSA, FM.
COM
POWER INPUT
TERMINALS
Explanation of Symbols
+ –
Symbol Publication
3/32
~
[2.38]
IEC 60417 - 5032
GROUNDING
SCREW
IEC 60417 - 5019
1-1/16
[26.99]
Series 1910 Switches - Models Operating Ranges, Deadbands
Operating Range,
Model in w.c.
1910-00 0.07 to 0.15
3X 1-1/16
1910-0 0.15 to 0.5
[26.99]
1910-1 0.40 to 1.6
1910-5 1.40 to 5.5
1910-10 3.0 to 11.75
1910-20 4.0 to 20.0
Phone: 219/879-8000
Fax: 219/872-9057
1/8 FEMALE NPT
HIGH PRESS. 60 TYP
CONNECTION
3
[76.20]
1-5/16
[33.32]
Ø3-1/2
TYP
[88.90]
51/64
[20.24]
1-7/8
[47.63]
2-9/32
[57.94]
2-7/16 [61.90]
Description
Alternating current
Protective conductor terminal
Approximate Dead Band
At Min. Set Point At Max. Set Point
0.04 0.04
0.10 0.10
0.15 0.16
0.30 0.30
0.40 0.40
0.40 0.50
www.dwyer-inst.com
e-mail: info@dwyermail.com
Bulletin E-56
(2) Ø3/16 [4.76]
MOUNTING HOLES
ON A 4-3/16 [106.36] B.C.
1/8 FEMALE NPT
LOW PRESSURE
CONNECTION