T/FS data sheet - Trend
T/FS data sheet - Trend
T/FS data sheet - Trend
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Data SheetT/<strong>FS</strong>Frost Protection ThermostatT/<strong>FS</strong> Frost Protection ThermostatDescriptionCapillary thermostat suitable for the prevention of freezing ofliquid filled heat exchangers or pipes, and similar applications.Switching action is responsive to the lowest temperature alongthe sensing element. IP54 (NEMA 3) housing with tamper-proofcover.Features• 6 metre (6.5 yds) capillary• Manual or automatic reset option• Adjustment range -10 °C to +12°C (14 °F to 54 °F)• IP54 (NEMA 3) housing• Integral mounting bracketPhysical120 mm (4.72”)60 mm (2.36”)Manual Reset Button(T/<strong>FS</strong>-M option)Temperature Setpointindicator130 mm (5.12”)6 m (6.5 yds)Capillary (suppliedcoiled)ø 6 mm(0.24”)70 mm (2.76”)Cable glandACC/FC5 mm (0.2”)50.5 mm (1.99”)130 mm (5.12”)50.4 mm (1.98”)T/<strong>FS</strong> Frost Protection Thermostat Data Sheet 91-2777 Issue 2 03/04/081
T/<strong>FS</strong>Data SheetINSTALLATION(1) Mount frost stat in a reasonably clean location, free fromdamp and condensation, using mounting bracket supplied(120 mm, 4.72” fixing centres).(2) Install the complete length of the element so that it spansthe face area of the heat exchanger, as shown in thediagram, so that it is exposed to all areas where lowtemperatures are likely to be encountered.Thermostat Element DuctTemperature of thermostat bodymust be greater thantemperature setting pointThe element is usually installed on the downstream sideof the heat exchanger and must be fixed in a verticalplane.The capillary has to be positioned with a large bendradius, never less than 25 mm (~1”). It is recomended touse the fixing clips (ACC/FC).The T/<strong>FS</strong> has a 250 Vac, 15 A switching capacity. It should beincorporated directly into the Air Handling Unit Control circuits toprotect heating and cooling exchanges and ductwork fabricAlternatively, the T/<strong>FS</strong> can be used to provide an input to the IQsystem controller to initiate a frost protection control strategy.If the capillary is damaged with a leak of gas the frost statsimulates a low temperature and sets the switch accordingly.Typical Mounting Arrangement2 T/<strong>FS</strong> Frost Protection Thermostat Data Sheet 91-2777 Issue 2 03/04/08
Data SheetT/<strong>FS</strong>CONNECTIONSNote that the room temperature at the thermostat body should not fall below the setting point.(1) Remove anti-tamper screw on top of face, and undoscrew on front of unit and remove front cover.digital inputchannel(2) Insert cable through cable gland and connect signalwires to terminals as shown. The unit can be wirednormally open or normally closed.(3) Adjust setting levels to required temperature set-pointusing screw on top of unit. 5 °C to 7 °C (41 °F to 44.6 °F)is recommended.(4) Replace cover and fit tamper-proof top cover.Note: Ensure cover is screwed shut and cable gland is properlytightened to guarentee IP54 protection.T/<strong>FS</strong>NCCNOredbluewhiteredbluedigital inputchannelredblueIQ1 or IQ2COMINIQ30(0V)N(In)+(24V)NT/<strong>FS</strong> switch shown in‘warm’ state(Examples of IQ connection to normally open contact)DISPOSALWEEE Directive :At the end of their useful life the packaging andproduct should be disposed of by a suitablerecycling centre.Do not dispose of with normal household waste.Do not burn.ORDER CODEST/<strong>FS</strong>-M: Frost protection thermostat with manual resetT/<strong>FS</strong>-A: Frost protection thermostat with automatic resetACC/FC: Set of 6 fixing clipsT/<strong>FS</strong> Frost Protection Thermostat Data Sheet 91-2777 Issue 2 03/04/083
T/<strong>FS</strong>Data SheetSPECIFICATIONSProduct description :T/<strong>FS</strong> frost protection thermostatMeasuring range :-10 to +12 °C (14 °F to 54 °F)Sensing element :6 metre (6.5 yds) gas filled coppercapillaryAmbient limits :-20 to +80 °C (-4 °F to +176 °F), 0 to 95%RH non-condensingControl action :Single pole, single throw circuit openson fall of temperatureElectrical rating :15 A, 250 VacConnections :Screw terminals for 0.5 to 4 mm 2 (12 to26 AWG) cableEnvironmentalProtection :IP54 (NEMA 3)Accuracy:±2°CDimensionsSensing element :3.2 mm (0.13”) dia. x 6 m (6.5 yds) longMinimum bending radiusof sensing element :20 mm (0.79”)Housing :130 mm x 130 mm x70 mm (5.12” x 5.12”x 2.76”) (with mounting bracket)Fixing centres :120 mm (4.72”)Cable entry:22 mm (0.87”) diameter cut-out fittedwith rubber grommetMaterialSensing elementHousingFixing clips:Copper/Tin plated:Base polyamide, cover polycarbonate(V-0):Polyamide (V-0)Please send any comments about this or any other <strong>Trend</strong> technical publication to techpubs@trendcontrols.com© 2008 Honeywell Technologies Sàrl, ECC Division. All rights reserved. Manufactured for and on behalf of the Environmental and Combustion ControlsDivision of Honeywell Technologies Sàrl, Ecublens, Route du Bois 3, Switzerland by its Authorized Representative, <strong>Trend</strong> Control Systems Limited.<strong>Trend</strong> Control Systems Limited reserves the right to revise this publication from time to time and make changes to the content hereof withoutobligation to notify any person of such revisions or changes.<strong>Trend</strong> Control Systems LimitedP.O. Box 34, Horsham, West Sussex, RH12 2YF, UK. Tel:+44 (0)1403 211888 Fax:+44 (0)1403 241608 www.trend-controls.com<strong>Trend</strong> Control Systems USA6670 185th Avenue NE, Redmond, Washington 98052, USA. Tel: (425)897-3900, Fax: (425)869-8445 www.trend-controls.com4 T/<strong>FS</strong> Frost Protection Thermostat Data Sheet 91-2777 Issue 2 03/04/08
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