INSTALLATION
1. Remove packing material from switch body-cap and remove tape
from magnet keeper. Adjust vane length if necessary on multi-layer
vanes only (see flow rate charts on next page). Install switch in
thredolet previously welded to line. In some cases, it may be
necessary to install the switch in a flange or tee (see installation
drawings on next page). Note: extreme care must be exercised in
welding the fitting to the line so that it is plumb and level.
ADJUSTMENT OF MULTI-LAYER VANE
Remove only those layers which are too long. Leave the smaller
layers to reinforce the vane. The longest vane fits 6˝ (150 mm) or
larger pipe, the second longest vane fits 4˝ (100mm) pipe, etc.
Actuation-Deactuation rates are shown in the charts on the next
page. To remove vane layers, proceed as follows:
a. Remove the two screws and lockwashers holding the layers
together. Do not lose these special corrosion resistant type 316
stainless steel screws and lockwashers.
b. Remove the unwanted layers.
c. Resecure the vane with the original two screws and
lockwashers.
d. With a hammer, lightly peen the ends of the screws so that they
can't back out.
e. If you lose the screws or lockwashers, don't replace with other
parts which may corrode and break. That will void the warrantee
and might cause severe damage to equipment located
downstream of the switch.
Note:
Custom vane units have been calibrated at factory to meet
requirements. Do not change.
2. The arrow on the side of the switch must point in the direction of
flow.
3. Wiring: UL and CSA units only: thread connecting wires through
conduit and connect. Wire in accordance with local electrical
codes.
Black - Common
Blue - N.O.
Red - N.C.
Note:
Double pole, double throw switches have dual black,
blue and red leads. These are connected in the same manner
as single pole, double throw switches, as described above.
EC-Type Certificate Installation Instructions:
Cable Connection
The cable entry device shall be an EEx d certified cable gland
suitable for conditions of use and correctly installed. The certified
cable gland and cable shall be rated for a minimum temperature
of 80°C.
Conduit Connection
An EEx d certified seal device such as a conduit seal with setting
compound suitable for conditions of use and correctly installed
shall be provided immediately to the entrance of the electrical
housing. The certified conduit seal with setting compound and
cable shall be rated for a minimum temperature of 80°C.
Note:
The switch is deactivated and contacts are in normal
condition when there is no flow in the line.
4. Make sure conduit or cable are properly sealed. Electrical
components must be kept free of moisture, including
condensation, at all times.
CAUTION:
To prevent ignition of
hazardous atmosphere, disconnect the device from the supply
circuit before opening. Keep assembly tightly closed when in
operation.
Note:
ATEX units only: The temperature class is determined by the
maximum ambient or medium/process temperature. The
approved ratings are: T6 -20°C
)
Tamb
)
75°C. Product may be
used in a maximum ambient or medium/process temperature of
75°C.
1-5/
8
[41
.
2
8
]
CLEARANCE FOR
COVER REMOVAL
3-11/32
8
4
.
93
2-23/32
[69,06]
1-1/2 MALE NPT
PROCE
SS
CONNECTION
[25
.
40]
A
B
C
D
E
F
G
S
TANDARD V4
8
10
9
6
7
4
3
1
2
3
4
5
7
6
9
10
8
CENELEC V4
NC
C
NO
Ref #
1
2
3
4
5
6
7
8
9
10
Standard V4
N/A
N/A
Explosion-proof housing
with 3/4˝ female NPT
conduit connection.
16 AWG, 6˝ (152 mm) long.
Internal
Magnet arm and switch
assembly.
Switch body of SAE 72
Brass or 316 Stainless Steel.
Five layer vane, 316 Stainless
Steel, Designed for 1/2˝ to 8˝
pipes. Usable in larger pipe
sizes.
Magnet keeper of 430
Stainless Steel.
Vane block of 316 Stainless
Steel.
ATEX/SAA
Cover lock.
External ground.
Explosion-proof housing with
3/4˝ female NPT conduit
connection.
Terminal Block
Internal ground.
Magnet arm and switch assembly.
Switch body of SAE 72 Brass or
316 Stainless Steel.
Five layer vane, 316 Stainless
Steel, Designed for 1/2˝ to 8˝
pipes. Usable in larger pipe
sizes.
Magnet keeper of 430 Stainless
Steel.
Vane block of 316 Stainless
Steel.
Dim
A
B
C
D
E
F
G
V4 in (mm)
8-3/16 (207.96)
6 (152.40)
4-11/16 (119.06)
1 (25.40)
1-5/16 (33.34)
7/8 (22.23)
11/16 (17.46)
V4-2 in (mm)
8 (203.20)
6-3/4 (171.45)
3-15/16 (100.01)
1-3/4 (44.45)
9/16 (14.30)
11/16 (17.63)
1/2 (12.70)
ATEX/
S
AA
TERMINAL CONNECTIONS
SPDT
TERMINAL CONNECTIONS
DPDT
Northeast Controls Incorporated
Tel: 845-986-8546 | Fax: 845-810-7625
Northeast Controls Incorporated
Tel: 845-986-8546 | Fax: 845-810-7625
www.dwyerstore.com
