Flowline GT10 Thermo-Flo - Manual (Page 3)

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SAFETY PRECAUTIONS INTRODUCTION
About this Manual:
PLEASE READ THE ENTIRE MANUAL PRIOR TO
INSTALLING OR USING THIS PRODUCT. This manual
includes information on all models of Flowline Thermo-Flo Flow
Switches: FT10 and GT10 series. Please refer to the part number
located on the switch label to verify the exact model which you
have purchased.
User’s Responsibility for Safety:
Flowline manufactures a wide range of flow switches and tech-
nologies. While each of these sensors is designed to operate in a
wide variety of applications, it is the user’s responsibility to select
a sensor 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. Note: Always install the 3/4” Viton
gasket with all versions of Thermo-Flo with metric threads. The G
threaded version will not seal unless the gasket is properly
installed. 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 FT10 and GT10 series sensors are available in two different wet-
ted materials. Models FT10-1__5 and GT10-1__5 are made of
Polypropylene (PP) with Ryton tips. Models FT10-5__5 and GT10-
5__5 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 appli-
cation 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 FT10 OR GT10 SERIES GENERAL PUR-
POSE FLOW SWITCHES IN HAZARDOUS LOCATIONS.
WARNING
The rating for the relay is 60 VA
Flowline’s Thermo-Flo flow switches are not recommended for
use with electrically charged application liquids. For most reli-
able operation, the liquid being measured may need to be elec-
trically grounded.
Always install the 3/4” Viton gasket with all versions of the
powered sensors with metric threads. The G threaded version
will not seal unless the gasket is installed properly.
Technology:
The thermal dispersion flow switch measures liquid or gas tempera-
ture to determine changes in flow velocity. As fluid flows across the
sensing tips, the temperature is reduced proportionately as a function
of the flow rate. When a temperature or velocity shift reaches the user
defined set point, the switch changes state indicating the appropriate
flow condition (flow or no-flow).
FLOWLINE's sophisticated electronics convert the temperature shift
into a signal which indicates whether a flow or no-flow condition
occurs. Depending on how the sensor is wired, this signal may be
wired for normally open or normally closed circuits.
FLOWLINE's Thermo-Flo flow switches have no moving parts to
clog or foul, making them suitable for a variety of applications,
including non-coating and non-scaling liquids. The FT10 series
directly measure mass flow and can operate over a broad range of liq-
uids from 0.4 to 1.2 specific gravity, 1 to 300 cp. The GT10 series
directly measure mass flow and can operate over a broad range of liq-
uids from 0.4 to 1.2 specific gravity, 1 to 300 cp.
Initialization Sequence for FT10 series:
Powering up the FT10 is different in water and in air. When the flow
switch is powered up while submersed, the FT10 will immediately
indicate flow before switching to its correct state. When the flow
switch is powered up while in air, the FT10 will immediately indicate
no-flow before indicating its correct state. A time delay may be used
to eliminate this initialization sequence. Flowline's thermal dispersion
relay controllers feature a 0 to 60 second time delay for your conve-
nience.