Dwyer A3000 - Manual

INSTALLATION
1. Location: Select a clean, dry, vibration-free location where
ambient temperatures will be between 20 and 120°F (-6.67 and
48.9°C). Tubing supplying pressure to the instrument can be prac-
tically any length but long runs will increase response time slightly.
2. Position: The PHOTOHELIC ® Switch/Gage is factory calibrated
for use with scale in a vertical plane. Operation at other angles may
affect accuracy and/or require zero adjustment. Most models can
be specially calibrated at the factory for other positions if specified
at time of ordering. Ranges below 1˝ W.C. must be used only with
scale vertical.
3. Mounting: The PHOTOHELIC ® Switch/Gage is normally mount-
ed before making electrical connections. The electrical enclosure
is removable at any time regardless of mounting method.
(A) Panel Mounting: Normal mounting is flush or through panel
as shown in Fig. B. Allow 4-
3 /
8
˝ (111.13 mm) clearance behind the
unit for removal of electrical enclosure. Make a 4-13/16˝ (122.24
mm) diameter hole in panel. Insert the PHOTOHELIC
®
Switch/Gage unit from front of panel and slip mounting ring over
case from behind with stepped side facing rear. Fit the snap ring
into narrow groove at back edge of the bezel. Thread four 6-32 x
1-1/4˝ mounting screws into tapped holes in mounting ring and
seat it against snap ring. Tighten screws against back of panel.
See Fig. B.
Series A3000 Photohelic ® Differential Pressure Switch/Gage
Specifications - Installation and Operating Instructions
Bulletin B-33-A
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
The Series A3000 PHOTOHELIC ® Switch/Gage is a versatile
2-in-1 instrument combining a time-proven Magnehelic ® differen-
tial pressure gage with low/high pressure switches. It is designed
to measure and control positive, negative or differential pressure of
air or other non-combustible, non-corrosive gases. Gage reading
is unaffected by switch operation. Switch set points are easily
adjusted with knobs located on gage face. Applied pressure and
switch set points are fully visible at all times. Deadband is one
pointer width, less than 1% of full scale. Each set point controls a
DPDT relay and both relays can be interlocked to provide variable
deadband control.
SPECIFICATIONS
GAGE SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±2% of full scale at 70°F (21.1°C). ±3% on -0 and
±4% on -00 models.
Pressure Limits: -20" Hg. to 25 psig (-0.677 to 1.72 bar). MP
option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar). 36003S
– 36010S; 150 psig (10.34 bar). 36020S and higher;1.2 x full
scale pressure.
Temperature Limits: 20 to 120°F.
(-6.67 to 48.9°C) Low temperature option available.
Process Connections: 1/8˝ female NPT.
Size: 4˝ (101.6 mm) dial face, 5˝ (127 mm) O.D. x 8-1/4˝ (209.55
mm).
Weight: 4 lb (1.81 kg).
SWITCH SPECIFICATIONS
Switch Type: Each setpoint has 2 Form C relays (DPDT).
Repeatability: ±1% of full scale.
Electrical Rating: 10A @ 28 VDC, 10A @ 120, 240 VAC.
Electrical Connections: Screw terminals. Use 167°F (75°C)
copper conductors only.
Power Requirements: 120 VAC, 50/60 Hz; 240 VAC & 24 VAC
Power optional.
Mounting Orientation: Diaphragm in vertical position. Consult
factory for other position orientations.
Set Point Adjustment: Adjustable knobs on face.
Agency Approvals: UL: File No. E38121, Vol. 1, Sec. 4; CSA:
File No. LR22541-34; CE: EN 61000-6-2: 1999, EN 6100-3-2:
2000, EN 61000-3-3: 2000.
Ø4-13/16 [122.24]
HOLE REQUIRED FOR
PANEL MOUNTING 1/2 NPT(M) PRESSURE CONNECTION.
SINGLE HIGH PRESSURE CONNECTION
FOR SERIES 36000S MODELS.
SNAP RING GROOVE
Fig. A
Fig. B
NOTE: Detailed dimension drawings are available from our Customer Service
Dept. for PHOTOHELIC ® switch/gages as installed in two optional enclosures.
For weatherproof housing, request no. 13-700132-00. /For explosion-proof
housing, request no. 13-700113-01.
2-1/2 [63.50]
2-1/16 [52.39]
2 [50.80]
1-1/4
[31.75]
(4) 6-32 HOLES
EQUALLY SPACED ON
A 5-1/8 [130.18] B.C.
Ш4-47/64
[120.25]
Ш5
[127.00]
Ш4 [101.60]
FACE
5-1/2 [139.70]
O.D.
MOUNTING
RING
5/8 [15.88]
5/8 [15.88] PANEL
MAX
3/16 [4.76]
3-7/8 [98.43]
5-1/8 [130.18]
6-3/8 [161.93]
(7-5/8 [193.68]) 4-3/8 [111.13]
HOUSING REMOVAL
3/4 CONDUIT
CONNECTION
Ø4-3/4
[120.65]
3-7/8 SQ
[98.43]
1/8 FEMALE NPT HIGH
PRESSURE CONNECTION
1/8 FEMALE NPT LOW
PRESSURE CONNECTION
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