Maintenance - Dwyer Instruments FLOTECT V6 series Installation And Operating Instructions Manual

EC-Type Certificate Installation Instructions:
Cable Connection
The cable entry device shall be certified in type of explosion protection flameproof
enclosure "d", suitable for conditions of use and correctly installed. For Ta ≥ 65°C
cable and cable gland rated ≥ 90°C shall be used.
Conduit Connection
An Ex d certified sealing device such as a conduit seal with setting compound shall
be provided immediately to the entrance of the valve housing. For Ta ≥ 65°C wiring
and setting compound, in the conduit seal, rated ≥ 90°C shall be used.
Note: ATEX and IECEx units only: The temperature class is determined by the max-
imum ambient and or process temperature. Units are intended to be used in ambient
of -20°C≤ Tamb ≤75°C. Units may be used in process temperatures up to 105°C
providing the enclosure and switch body temperature do not exceed 75°C. The stan-
dard Temperature Class is T6 Process Temp ≤75°C. Alternate Temperature Class
of T5 Process Temp ≤90°C and 115°C (T4) Process Temp ≤105°C are available
consult factory.
Refer to Certificate No: IECEx DEK 11.0039 for conditions of safe use for IECEx
compliant units.
All wiring, conduit and enclosures must meet applicable codes for hazardous areas.
Conduits and enclosures must be properly sealed. For outdoor or other locations
where temperatures vary widely, precautions should be taken to prevent conden-
sation inside switch or enclosure. Electrical components must be kept dry at all
times.
CAUTION: To prevent ignition of hazardous atmospheres, disconnect the device
from the supply circuit before opening. Keep assembly tightly closed when in use.

MAINTENANCE

Inspect and clean wetted parts at regular intervals. The cover should be in place at
all times to protect, the internal components from dirt, dust and weather and to main-
tain hazardous location ratings. Disconnect device from the supply circuit before
opening to prevent ignition of hazardous atmosphere. Repairs to be conducted by
Dwyer Instruments, Inc. Units in need of repair should be returned to the factory
prepaid.
Example
V6 EP B B S 2
Series
V6
Construction
EP
Upper
B
Body Material
S
Lower
B
Body Material
S
Circuit (Switch)
S
Type
D
Process
1
Connection
2
Size
3
4
5
6
LF
Process
Connection
Type
Switch Options
Options
* Options that do not have ATEX and IECEx
Attention: Units without the "AT" suffix are not Directive 94/9/EC (ATEX) compliant. These units are not intended for use in potentially hazardous
atmospheres in the EU. These units may be CE marked for other Directives of the EU.
V6EPB-B-S-2-B-MT flow switch; brass upper housing, brass lower housing, brass
tee with 3/4˝ NPT connections, SPDT snap switch, and high temperature option
B MT
Series V6 flow switch
Explosion Proof and Weatherproof
Brass
303 Stainless Steel
Brass
303 Stainless Steel
SPDT
DPDT
1/2˝ NPT
3/4˝ NPT
1˝ NPT
1-1/4˝ NPT
1-1/2˝ NPT
2˝ NPT
Low Flow Model (1/2˝ NPT connections)
No Tee, Male NPT Connection, Field Trimable Vane
0
Brass Tee
B
Forged Steel Tee
FS
Iron Tee
MI
PVC Tee with NPT*
PVC
PVC Tee with sweat joints*
PVCSW
304 Stainless Steel Tee
S
304 Stainless Steel 150# Tee
S150
(For LF Model no tee material chosen, tee material matches lower housing choice)
Gold Contacts on snap switch for dry circuits (see specifications for ratings)
MV
High Temperature switch rated 400°F (205°C) (see specifications for ratings)*
MT
AT ATEX approved construction (with JCT option standard)
CSA CSA approved construction (with JCT option standard)*
IEC IECEx approved construction (with JCT option standard)
CV Custom Vane
FTR Flow Test Report
GL Ground Lead*
ID
Customer Information on standard nameplate
JCT
Weatherproof and explosion-proof junction box*
JCTLH
Weatherproof and explosion-proof junction box, left side
ORFB
Orifice Brass
ORFS Orifice Stainless Steel
RV Reinforced Vane
TBC Terminal Block Connector*
VIT Viton O-rings in place of Buna-N on low flow models
®
018 .018 Spring
020 .020 Spring
022 .022 Spring
022A .022 Spring with Alnico
031 .031 Spring
V6 With Tee
Cold Water - Factory Installed Tee
Approximate actuation/deactuation low Rates
GPM upper, M /HR lower
3
1/2˝ NPT 3/4˝ NPT 1˝ NPT
1.5 1.0
2.0 1.25 3.0
0.34 0.23 0.45 0.28 0.68
Air-Factory Installed Tee
Approximate actuation/deactuation flow rates
SCFM upper, NM 3 /M lower
3/4˝ NPT 1˝ NPT
1/2˝ NPT
10.0 8.0 14
6.5 5.0
.28 .23 .40
.18 .14
V6 Low Flow, Field Adjustable
Cold Water - Low Flow Models
Approximate actuation/deactuation flow rates
GPM upper, M /HR lower
3
Minimum Maximum
.04 .03 .75 0.60
.009 .007 0.17 0.14
Air - Low Flow Models
Approximate actuation/deactuation flow rates
SCFM upper, NM /M lower
3
Minimum Maximum
.18 .15 2.70 2.0
.005 .004 .08 .06
magnet
®
1-1/4˝ NPT 1-1/2˝ NPT
4.0 3.0 6.0 5.0
1.75
0.91 0.68 1.36 1.14
0.40
1-1/4˝ NPT 1-1/2˝ NPT 2˝ NPT
12 21 18 33 30 43
.34 .59 .51 .93 .85 1.19 1.02
2˝ NPT
10.0 8.5
2.27 1.93
36