Dwyer V7 - Manual (Page 2)

©Copyright 2010 Dwyer Instruments, Inc. Printed in U.S.A. 2/10 FR# 82-443693-00 Rev. 3
W.E. ANDERSON DIV., DWYER
INSTRUMENTS, INC.
P.O. BOX 358 • MICHIGAN CITY, INDIANA 46361 U.S.A.
Phone: 219/879-8000 www.dwyer-inst.com
Fax: 219/872-9057 e-mail: [email protected]
INSTALLATION
Unpacking
Remove the V7 from the shipping carton and remove any packaging material.
Inspect for damage. If damage is found, notify the carrier immediately.
Set Point
The switch can be installed in any position but the actuation/deactuation flow rates
are based on horizontal pipe runs and are nominal values. The V7 enables the
installer to choose the approximate actuation/deactuation flow rates by trimming
the full size vane according to the template on the vane as shown in Figure 1.
Flows in the following chart are based on installation in standard tees, except the
four inch which is in a 4˝ x 1˝ pipe saddle.
Mounting
Location
• The process pressure and temperature, and ambient temperature must be
within specified limits.
• Make sure the cover is easily accessible to allow for wiring.
Install unit into piping with 1˝ NPT bushing with housing cover facing perpendicular
to flow, see Figure 2 below. When bushings are used they must be back drilled to
allow proper clearance. Bore the I.D. to 1˝ (25 mm). The depth of the bore must
leave internal threads 9/16˝ (14 mm) high for proper engagement between lower
housing of the switch and the bushing. When threading into pipe use wrench on
flats on lower housing only. Check proper vane travel and switch operation after
mounting.
ELECTRICAL CONNECTIONS
Installation must be made in accordance with local codes and
regulations. Wire according to switch action required. The N.O.
(normally open) contacts will close and N.C. (normally closed)
contacts will open when flow increases to the actuation point. The
contacts will return to “normal condition” when flow decreases to
the deactuation point.
The conduit connection must be made such that condensation is not allowed to
enter the switch housing. If necessary install a conduit breather in a separate
conduit body to prevent buildup of moisture. If nonmetallic conduit is used the
protective ground may be connected to the internal ground connection screw. Use
90°C copper conductors only.
MAINTENANCE & REPAIR
Inspect and clean wetted parts at regular intervals. The cover should be in place at
all times to protect the internal components from dust, dirt and weather.
Disassembly or modifications made by the user will void the warranty and could
impair the continued safety of the product. If repair is required obtain a Return
Goods Authorization (RGA) number and send the unit, freight prepaid, to the
address below. Please indicate a detailed description of the problem and
conditions under which the problem was encountered.
Dwyer Instruments, Inc.
Attn: Repair Department
102 Indiana Highway 212
Michigan City, IN 46360
1-7/8
[47.52]
5/8
[15.88]
SWITCH MUST
BE MOUNTED
PERPENDICULAR
TO THE FLOW
WRENCH ON FLATS
FLOW
FIGURE 1
FIGURE 2
GROUND COMMON
NORMALLY OPEN
NORMALLY CLOSED
COMMON NORMALL
Y
OPEN
NORMALL
Y
CLOSED
FIGURE 3
Approximate Actuation-Deactuation Flow Rates for Cold Water
Actuate GPM [lpm]/Deactuate GPM [lpm]
Vane
a (full
vane)
b
c
d
e
f
g
h
i
j
k
l
m
n
o
1˝ NPT
7.5 [28.4]/
6.8 [25.7]
1-1/4˝ NPT
8.13 [30.8]/
7.63 [28.9]
1-1/2˝ NPT
7.5 [28.4]/
6.7 [25.4]
8.3 [31.5]/
7.7 [29.1]
8.3 [31.4]/
7.5 [28.4]
9.8 [37.1]/
9.2 [34.8]
11.65 [44.1]/
10.9 [41.3]
2˝ NPT
12.8 [48.5]/
12.1 [45.8]
12.7 [48.1]/
12 [45.4]
14 [53]/
13.6 [51.5]
13.7 [51.8]/
13.4 [50.7]
16.9 [64]/
15.6 [59.1] 3˝ NPT
31.6 [119.6]/
29.6 [112] 4˝ NPT
58 [218]/
52 [197
F-V7:V-13 2/10/10 3:42 PM Page 2