Omega TDFS2 User guide

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SERIESTDFS2|W.E. ANDERSON THERMAL DISPERSION FLOW SWITCH

TDFS2-1-P-06

TDFS2-2-P-06

BENEFITS/FEATURES

• Betterreliabilityandlifeexpectancythanmechanicalowswitcheswithnopaddlesorvanestowearorbreak,nojamsinthe

 paddlemovement,andnosealsonmovementassemblytowearorleak

• Longoperationlife,asitisnotaffectedbyemptypipebyavoidingoverheatingwithheatingabovetheprocesstemperature

 andthencoolingdowntoprocesstemperature

• Lowersystemruncostwithlowpressuredropwith10%insertionintotheow(e.g.1/8˝for3/4˝schedule40pipe)

DESCRIPTIONAPPLICATIONS

• Boiler ow proving

• Hot water heaters

• Chillers

• Liquid transfer systems

The Series TDFS2 Thermal Dispersion Flow Switch is a thermal ow

switch that indicates whether the ow rate is above or below a user set ow rate. The unit incorporates two LED status indicators providing visual switch indication. The set ow rate (setpoint) is easily eld adjustable with included magnet and the unit has both NO and NC NPN outputs.

SPECIFICATIONS

Service Compatible water-based uids.

Wetted Materials 316 SS.

PipeRange 1/2 to 1-1/2˝ (15 to 40 mm) or 2 to 10˝ (50 to 250 mm) (model selectable).

SetPointRange 0.5 to 10 ft/s (0.15 to 3.0 m/s).

Repeatability 0.07 ft/s (0.02 m/s) +3% of setpoint.

Typical Deadband 0.1 ft/s (0.03 m/s) +15% of setpoint.

TemperatureLimits Ambient: 5 to 140°F (-15 to 60°C); Process: 5 to 140°F (-15 to 60°C), Storage: -40 to 185°F (-40 to 85°C).

PressureLimits 300 psig (20.67 bar).

ResponseTime Approximately 8 s.

PowerRequirement 9-24 VDC.

SwitchingCurrent 400 mA, derate 5 mA/°C above 23°C.

CurrentConsumption Average: 93 mA; Peak: 300 mA.

Electrical Connection 1/2˝ NPT female or cable gland with 4 conductor 22 AWG 6´ (1.83 m) long (model selectable).

ProcessConnection 1/2˝ NPT or BSPT male (model selectable).

EnclosureRating NEMA 4X (IP65).

HousingMaterials 316 SS, 416 SS, polycarbonate, neoprene, and acrylated urethane.

Switch Type 1 NO NPN, 1 NC NPN.

InputPowerandProtection 0.5 A fuse (resettable) reverse polarity protected.

SwitchedOutputProtection 0.5 A fuse (resettable) reverse polarity protected.

AgencyApprovals CE.

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DIMENSIONS WIRINGDIAGRAM

TDFS

[48.26]

CABLE

CABLE GLAND

1-1/8 HEX

4-3/16

[106.17]

1-21/64

[33.78]

29/64 [11.68]

TDFS2-1-P-06

STATUS INDICATOR

SETPOINT TARGET

PROCESS CONNECTION 1/2˝ NP

SENSOR

POWER (RED)

NC (GREEN)

NO (WHITE)

LOAD(S)

–

DC SUPPLY 9-24 VDC

CABLE

CABLE GLAND

5-5/8

1-1/8

HEX

[142.88]

2-25/32

[70.49]

1-29/32

TDFS2-2-P-06

STATUS INDICATOR

SETPOINT TARGET PROCESS

CONNECTION 1/2˝ NPT OR BSPT

SENSOR

HOWTOORDER

Use the bold characters from the chart below to construct a product code.

TDFS2 -1 -P -06 BSPT

SERIES

TDFS2: Thermal dispersion ow switch

PIPESIZE

-1:1/2 to 1-1/2˝ (15 to 40 mm)

-2: 2 to 10˝ (50 to 250 mm)

ELECTRICALCONNECTION

-C: 1/2˝ female NPT with PVC cable for conduit connection

-B: Cable gland with burial rated cable

-P:Cable gland with PVC jacketed cable

ACCESSORIES

GROUND (BLACK)

HOUSING (DRAIN WIRE)

EARTH GROUND

OPTIONS

-BSPT:1/2˝ BSPT process connection

CABLELENGTH

-03:3 ft cable (0.91 m)

-06:6 ft cable (1.83 m)

-10:10 ft cable (3.05 m)

-15:15 ft cable (4.57 m)

-20:20 ft cable (6.07 m)

-25:25 ft cable (7.62 m)

-30:30 ft cable (9.14 m)

-35:35 ft cable (10.67 m)

-40:40 ft cable (12.19 m)

-45:45 ft cable (13.72 m)

-50:50 ft cable (15.24 m)

Model Description

100571-00 Replacement set point magnet

DWYER INSTRUMENTS, INC.

Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.