Dwyer TDS User Manual

Warranty, service & repair warranty

Warranty, Service & Repair

WARRANTY

About this Manual:

PLEASE READ THE ENTIRE MANUAL

PRIOR TO

INSTALLING OR USING THIS PRODUCT. This manual
includes information on all models of Dwyer Thermal Dispersion
Flow Switches: TDS series. Please refer to the part number locat-
ed on the switch label to verify the exact model which you have
purchased.

User’s Responsibility for Safety:

Dwyer manufactures a wide range of flow switches and technolo-
gies. While each of these sensors is designed to operate in a wide
variety of applications, it is the user’s responsibility to select a sen-
sor model that is appropriate for the application, install it properly,
perform tests of the installed system, and maintain all components.
The failure to do so could result in property damage or serious
injury.

Proper Installation and Handling:

Because this is an electrically operated device, only properly-
trained staff should install and/or repair this product. Use a proper
sealant with all installations. Never overtighten the sensor within
the fitting, beyond a maximum of 80 inch-pounds torque. Always
check for leaks prior to system start-up.

Material Compatibility:

The TDS series sensors are available in two different wetted materials.
Models TDS 1__ are made of Polypropylene (PP) with Ryton tips.
Models TDS 2__ are made of Polyvinylidene Fluoride (PVDF). Make
sure that the model you have selected is compatible with the application
liquid. To determine the chemical compatibility between the sensor and
its application liquids, refer to an industry reference such as the
Compass Corrosion Guide (available from Compass Publications,
phone 858-589-9636).

Wiring and Electrical:

The supply voltage used to power the sensor should never exceed a
maximum of 36 volts DC. Electrical wiring of the sensor should be
performed in accordance with all applicable national, state, and
local codes.

Flammable, Explosive and Hazardous Applications:

DO NOT USE THE TDS SERIES GENERAL PURPOSE FLOW
SWITCHES IN HAZARDOUS LOCATIONS.

Thermal Dispersion
Flow Switch
TDS Series
Owner’s Manual

I P

If for some reason your product must be returned for factory ser-
vice, contact Dwyer Inc. at (219)879-8000 to receive a Material
Return Authorization number (MRA), providing the following
information:

1. Part Number, Serial Number
2. Name and telephone number of someone who can answer

technical questions related to the product and its application.

3. Return Shipping Address
4. Brief Description of the Symptom
5. Brief Description of the Application

Once you have received a Material Return Authorization number,
ship the product prepaid in its original packing to:

Dwyer Instruments Inc.
PO Box 373
102 Indiana Hwy, 212
Michigan City, IN 46361

Please include the information about the malfunction with your
product. This information enables our service technicians to
process your repair order as quickly as possible.

Step One

WARNING

The rating for the relay is 120 VAC/60 VDC @ 1A. For CE
rated applications, the relay rating is 60 VAC/60 VDC @ 1A.

Dwyer’s Thermal Dispersion flow switches are not recom-
mended for use with electrically charged application liquids.
For most reliable operation, the liquid being measured may
need to be electrically grounded.