Dwyer Series 1700 User manual

Dwyer Series 1700 User manual
DT es
011/32 [8.73]
TYP 2 PLACES
4-1/8
[104.78]
STANDARD CONNECTORS
ARE 1/4 [6.35] WIDE
ARE 3/16 [4.76] WIDE
Series 1700 Pressure Switches
Operating Ranges and Deadbands
Approximate Deadband
Ranges
Model | Inches W.C. | At Minimum | At Maximum
Number (MM W.C.) Set Point Set Point
15-.55 0.03 0.06
1710-0 (3.81-13.97) (0.77) (1.53)
1710-5 5-7.5 0.10 0.50
(12.71-190.5) (2.55) (12.71)
1710-10 |7.0-15.0 1.0 1.5
(177.8-381.0) (25.4) (38.1)
Note: 1711 models are identical to 1710 models except for a special
snap switch with gold contacts designed for low current circuits. See
electrical ratings.
CAUTION: USE THESE SWITCHES ONLY WITH AIR OR
OTHER NON-CORROSIVE, NON-COMBUSTIBLE GASES.
INSTALLATION
1. Select a location free of excessive vibration, oil or water, and
corrosive or explosive gases. Ambient temperature must not
exceed 190° F,
2. Mount switches with diaphragm in vertical plane. If conden-
sation is likely, connections should face down to allow drainage.
3. Connect switch to source of pressure, vacuum or differential
pressure. Use '/:” or %6” ID vinyl or rubber tubing.
A.) Differential pressure: Connect higher pressure
to port marked H and lower pressure to port marked L.
B.) Positive pressure only: Connect to port marked H and leave
other port vented to atmosphere.
C.) Negative (vacuum) pressure only: Connect to port marked L
and leave other port vented to atmosphere.
4. Make electrical connections to the quick connect tabs on the
single pole, double throw (SPDT) snap switch. Use only match-
ing 1/4 (F) connectors on standard switches, gold contacts use
*/15” (F) connectors. Do not solder wires directly to switch termi-
nals as damage will result. The normally open contacts will
close and the normally closed contacts will open as pressure (or
vacuum) increases above the set-point.
CAUTION: Do not exceed maximum electrical rating of 5
amps resistive for Model 1710 and 0.1 amps resistive for
Model 1711.
©Copyright 2 2000 er A ene
Series 1700 Differential Pressure Switch
Specifications - Installation and Operating Instructions
3/16 [4.78] TYP
BOLT CIRCLE
—
GOLD CONTACT CONNECTORS
Entes § in na = A. Do
Bulletin E-72
| 1-9H6
SET POINT [39.69]
ADJUSTMENT
SCREW
4-11/16
[119.06] C
COM / (
N.0.
L12oTyp NC
LOW PRESSURE HIGH PRESSURE
5/16 [7.94]
os 29/32 [23.02]
PHYSICAL DATA
Compatibility: Use only with air or other non-corrosive, non-
combustible gases.
Temperature Limit: 190°F (88°C) maximum.
Maximum Pressure: 2 psig (14 kPa).
Pressure Connections: Dual size for '/:” and °/16” ID vinyl or
rubber tubing.
Electrical Ratings: 1710: 5A @ 125, 250, 277 VAC, 1/10 HP @
250 VAC, 150 VA. 1711: 1A @ 125 VAC, ЛА @ 12 VDC.
Wiring Connections: (3) '/:” quick connect.
Set Point Adjustment: External slotted head screw.
Housing: Glass filled PBT (polybutylene terephthalate).
Diaphragm: Molded silicone rubber.
Diaphragm Plate: Aluminum.
Calibration Spring: Blue spring steel.
Weight: 4 ounces (113 grams).
Position: Diaphragm vertical.
ADJUSTMENT
To change the set-point use the following procedure.
1. With the switch in the same position in which it will be used,
attach tubing from the high pressure port to one leg of a tee.
The second leg should be run to a manometer or pressure
gage of known accuracy and in a range appropriate for the
switch being set. The third leg should be connected to a con-
trollable pressure source such as Dwyer No. A-396 calibration
pump or similar device. Keep tubing lengths as short as pos-
sible to assure quick response.
2. Connect a volt/ohm meter or other circuit tester to switch
contacts to indicate when switching occurs.
3. Slowly apply pressure to the system until switching occurs
and note the pressure required. If adjustment is necessary,
turn the set-point adjustment screw clockwise to raise or
counter-clockwise to lower the actuation point. When the
required setting has been reached, exercise the switch through
two or three additional cycles to verify consistent operation.
The first actuation of an inactive pressure switch will normally
be higher than successive operations.
MAINTENANCE
The moving parts of these switches are sealed and require no
periodic maintenance or lubrication. The only adjustment is
that of the set-point. Care should be taken to keep the switch
dry and reasonably free of dirt and dust.
FR#2A-440630-00 Rev.1
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