Watts Radiant HeatWeave Under Floor Manual-En-20080501

8/9/2019 Watts Radiant HeatWeave Under Floor Manual-En-20080501

1/16

Installation Manual

w w w . w a t t s r a d i a n t . c o m 8 0 0 - 2 7 6 - 2 4 1 9

E l e c t r i c R a d i a t F l r W a r i g

CONTENTSIntroducing Heatweave UnderFloorMaterials and Cautions

PART 1Inspect the Mat and Sensor

PART 2Electrical Service Rough-in

PART 3Install the Mat

PART 4Final Wiring

PART 5Install the Insulation

PART 6Wiring Diagrams

PART 7Troubleshooting Guide

Please be aware that local

codes may require this

product and/or the control

to be installed or connected

by an electrician.


2/16

HeatWeave UderFlr i a afe adefficiet electric flr-warig prductfr iterir applicati. It i itededly fr itallati uder a wdubflr i reidetial ad light c-

ercial itallati. It i t deigedfr ther purpe uch a rf w-eltig. Ay ue r itallati f thiprduct ther tha what i tated ithi itallati aual will vid theLiited Warraty.

HeatWeave UderFlr i deigedt deliver apprxiately 10 watt/q.ft. f flr area. The teperature fthe war flr i depedet hwwell the flr i iulated, a well athe iulatig value f the flrigaterial. If the jit pace i ealed

agait air leakage, exterir ri jitare iulated, ad the udereath idef the flr i iulated, t flr cabe heated up t 15F warer tha theywuld therwie be. Due t the iu-latig value f carpet, carpeted flray t achieve the ae teperaturerie. The flr ay r ay t achievethi teperature rie, ad repree-tati are ade regardig the perfr-ace f ay yte.

Fr bet reult, itall ufacedfibergla R-19 r R-13 (r equivalet)belw the at. D t iulate belwthe at with re tha R-19, ad re tha R-11 ttal tp f theubflr, icludig all flr cverig,rug ad ther ite placed tp.HeatWeave UderFlr ca be ued theat a r, a well a war the flr,prvided the heat l f the rfall withi the at capabilitie. Adeiger ut deterie if the utputfr the HeatWeave UderFlr i

Shieldedpower lead

InsULATIon(mInImUm R-13)

HeatWeave UnderFloor mats are only intended for installation

below the subfloor.

Shielded power leads make for a tougher and

safer connection to the controls.

2 HeatWeave UnderFloor Installation Manual

Introducing HeatWeave UnderFlooreugh t atch the heat l f thetructure. Refer t page 3 fr helpfuldeig guidelie.

The HeatWeave UnderFloor Mat

The at i cped f a heatigcable, a fil radiatr t ake a radi-at urface, ad a et f pwer leadfr cecti t the flr-eigctrl. Thee at are aufacturedi ize uitable t heat jit baypaced 12, 16, ad 19.2 ceter.mat are rated either 120 VAC r 240

VAC. select the at legth t fit itthe jit pace available. multipleat ca be ued t fill a larger area,hwever they ut be wired tgetheri parallel (t i erie) if they are t

be cected t the ae ctrl.NEVER combine 120-VAC mats w ith240-VAC mats.

Viit the Watt Radiat Web iteat www.wattradiat.c, r call800-276-2419 if there are ay quetiregardig the itallati f the at rit related electrical cpet.

Subfloor

UnderFloo(with 2 air g

above the m

Insulation

Floor joist

Cross section of typicalUnderFloor installation


3/16

Designing a HeatWeave UnderFloor System

HeatWeave UnderFloor Installation Manual 3

I geeral, HeatWeave UderFlrhuld be italled i all flr areawhere flr warig i deired. It cabe italled t either war the flrr t heat the pace. If HeatWeave i

beig italled t heat the pace, firtperfr a heat l calculati. UeRadiatWrk r a iilar prgra tcalculate the heat l f the r().HeatWeave ca be expected t prvideapprxiately 34 BTU/hr/q.ft. f at.Thi aue the at are italledper thi aual, icludig the ue fprper iulati techique. makeure iulati i italled a hw page 10. There ut be a dead airpace fr UderFlr at t be effec-tive. Thi utput al aue a flr

cverig ther tha carpet ad pad.The utput will be greatly diiihedwith a carpet flr cverig ad/r thelack f prper iulati.

Determine how much Mat isNeeded for the Installaton

T deterie hw uch at ieeded, take e f tw apprache:

1. Fr a rugh etiate, ultiplythe wall-t-wall area by 75%80%.Cvert thi t liear feet f at adelect fr the legth f at hwi the table page 6.

2. Fr a accurate eaureet,lk uder the ubflr t ee whereat ca be tapled. Lkig carefullyat each jit bay, eaure the legth fpe area i that bay that ca receivea at, ad elect the at fr thetable page 6 that fit the pace.Reeber that thee at cat be

cut hrter t fit, r dified i ayway t fit ultiple jit bay. D ticlude i thee eaureet areathat ctai ite that wuld btructitallati f the at (retur air

duct, upply duct, light fixture, etc.).Where at are t italled, the flrabve will t get very war.

Wiring Multiple Mats TogetherEach at i deiged t be italled

i ly e jit bay. The at catbe cut hrter t fit a hrter jit bayr dified i ay way t fill ultiplejit bay. Hwever, re tha eat ay be italled i a jit baywhere there are barrier uch a crbracig. A typical itallati i hw

belw.sice everal at will be required

t war the flr area, the at utbe wired tgether i parallel (t ierie) at a jucti bx belw theflr, the electrical wire fed frthere up t the flr-eig ctrlbx. select at fr the eaiet wirigpible. If all the pwer lead ed upat e ed f the r, it will be ucheaier t wire the tgether i thejucti bx. The jucti bx utbe acceible after all fiihig wrki cpleted. Be ure t piti theat that thi i pible.

Mat Voltage Requirementsselect either 120-VAC at r

240-VAC at (ee table page 6).D t ix 120-VAC at ad c-trl with 240-VAC at ad ctrl

oberve thee geeral vltage guide-lie:

1. Fr area ttalig up t abut190 q. ft. (abut 15 ap), ue120-VAC at with a sustat ctr

2. Fr area exceedig abut 190q. ft. ad up t abut 350 q. ft., ue240-VAC at with a sustat ctrl have at ttalig 15 ap r le.

3. Ue 240-VAC at ad asustat/sustat Relay ctrl yte(ee wirig diagra i Part 6) fr attalig re tha 15 ap at 240

VAC.Regardle f the vltage require-

et i a particular itallati, akure the circuit breaker ca hadle thlad. Fllw all electrical cde frdeteriig the ize f the breaker.

Floor-sensing ControlsT ctrl the HeatWeave

UderFlr yte, itall either aprgraable r -prgraableflr-eig sustat r sustat Relayte. The er huld be italleper itructi i Part 2 (page 7).

Pleae referece the HeatWeavecatalg, r ctact a HeatWeave di-tributr fr re ifrati.

Floor joist

Cross bridging or blocks

Insulated around outside of area

Insulated underneath mat

Areas with ductwork or piping

may not allow mat.

Insulated at ends

UnderFloor mats

Install mats 2 below subfloor


4/16


NEVER cut the at, r reve the fil radiatr, r dify the at i ay way. The at utreai itact. Hwever, the pwer lead ay be cut hrter, if eceary, but everreved cpletely.

NEVER leave the at rlled up r buched i the jit bay. make ure the at i cpletelyurlled ad i italled cpletely flat.

NEVER attept t repair the at if it i daaged. Call the factry fr itructi.

NEVER itall e at tp f ather r verlap the at t itelf. Dig will cauedageru verheatig.

NEVER frget t itall the flr er.NEVER reve the aeplate label.

NEVER allw etal bject uch a taple, etal pipe, ductwrk, r trap t reai i ctact with the fil radiatr f the at.

NEVER taple cler tha 1/4 fr the heatig wire.

NEVER itall the at cler tha 2 fr the ubflr.

NEVER itall the at cler tha 8 fr the edge f utlet bxe ad jucti bxe ued t ut urface lightig fixture.

NEVER ru at acr jit.

NEVER iulate belw the at with greater tha R-19, ad greater tha R-11 ttal tp f the ubflr, icludig all flr cverig,rug, ad ther ite placed tp.

ALWAYS eter at ad er reitace readig i the mat ad ser Reitace Lg (ee page 5) befre, durig, ad after the

itallati prce.

ALWAYS pay cle atteti t the vltage ad aperage requireet f the breaker, the ctrl, ad the at. Fr itace, d tupply 240 VAC t 120-VAC at r ctrl.

ALWAYS ake ure all electrical wrk i de by qualified per i accrdace with lcal buildig ad electrical cde, secti 62 fCEC Part I, ad the natial Electrical Cde (nEC), epecially Article 424, Part IX f the nEC, AnsI/nFPA 70.

ALWAYS ue cpper ly a upply cductr.

ALWAYS affix the warig label (icluded with thi aual) t the ctrl r ther lcati where it i eaily ticed i the areactaiig the at.

ALWAYS eek help if a prble arie. If ever i dubt abut the crrect itallati prcedure t fllw, r if the prduct appear t bedaaged, the factry ut be ctacted befre prceedig with the itallati.

Pleae viit www.wattradiat.c, r call the Deig Departet at 800-276-2419 if there are ay queti r prble

regardig the itallati f the at r it related electrical cpet. If the prduct appear t be daaged, the factry ut

be ctacted befre prceedig with the itallati r prped repair.

Read thee cauti carefully befre begiig the itallati.

Never cut the mat!

NO!

HeatWeave UderFlr at().* see

page 3 t deterie hw uch at i

eeded fr each jit pace.

Flr-eig sustat ctrl* (pr-

graable r prgraable, with

built-i GFCI), r a sustat/sustat Relay

ctrl yte.

GFCI circuit breaker. (sustat ad

sustat Relay ctrl have a built-i

GFCI; therefre, the GFCI-type circuit

breaker i t receded ice tw

material ad Tl neededGFCI ay cflict ad caue prble.

If uig the sustat r sustat Relay

ctrl, ue a tadard circuit breaker.)

Flr er (icluded with ctrl).

HeatWeave UderFlr Itallati Kit*

(iclude a Itallati maual ad

nailTite). Electrical jucti bx fr pwer lead.

A extra-deep electrical bx fr the

flr-eig ctrl.

12-gauge electrical wirig.

* Ite available fr HeatWeave. All ther ite are t icluded ad ca be purchaed lcally.

The sustat ad sustat Relay are apprved fr ue i the U.s. ad Caada, eparate fr theHeatWeave Lited aebly.

3/4 cduit t prtect pwer lead, if

required by lcal cde.

Ludmuth itr.

Digital heter (ulti-eter) able

t eaure up t 20,000 h (W).

Variu electrical/ctructi tl

(taple gu, tape eaure, arker, wiretripper, crewdriver, drill with 1/4 ad

1/2 drill bit, ad electrical fih-tape).

Iulati (R-13 r R-19 fibergla

receded).


5/16

Monitor the Wire!Thrughut the itallati prce

it i very iprtat t take reitacereadig f the at ad flr erwire t ake ure they have t

bee daaged. Ue a quality digitalheter (ulti-eter) able t ea-ure up t 20,000 h (W) t takethee readig. Aalg eter (withthe vig eedle) are t accurateeugh fr thi prduct.

Use the LoudMouth MonitorThe Ludmuth i deiged t itrthe at durig the itallati prce.If the heatig wire i cut r daageddurig itallati, thi device uda alar. Ak abut purchaig thi

valuable tl.


MAT 1 MAT 2 MAT 3

mat serial nuber

mat size

mat Vltage

Factry mat Reitace Rage

OUT OF THE BOX BEFORE INSTALLATION (ohms)

mat black t white

mat black t gree

mat white t gree

ser Wire

AFTER SENSOR AND MAT ARE INSTALLED IN JOIST BAY (ohms)

mat black t white

mat black t gree

mat white t gree

ser Wire

AFTER INSULATION IS INSTALLED (ohms)

mat black t white

mat black t gree

mat white t gree

ser Wire

nte: Wire clr lited are fr 120-VAC at. see directi abve fr the 240-VAC clr cbiati t checkRETAIN THIS LOG TO RETAIN THE WARRANTY! DO NOT DISCARD!

MAT AND SENSOR RESISTANCE LOG

PART 1: Inspect the Mat and SensorEssential Product Informationand Warranty

D t reve the aeplate labelfr the pwer lead (ee pht).Recrd the erial uber, at ize,

vltage, ad at reitace rage itthe reitace lg belw fr each atad er wire.

T retai the Liited Warraty theeite ad the fllwig reitaceeaureet MUST be recrded,a well a all tep f thi aualfllwed. Refer w t the LiitedWarraty the back cver f thiaual fr cplete requireet.

MeasurementsAt the very leat, take reitace read-

ig (1) befre begiig itallati,(2) after the at ad er have beeitalled i the jit bay, ad (3) afteriulati i italled.

Checking for Breaksmeaure reitace betwee the

black ad white lead (black ad bluelead fr 240-VAC at) ad recrd thibelw. Thi eaureet huld bewithi the rage hw the ae-plate label. A cut r break i the wirei idicated by a reitace f ifiiteh ( ctiuity, r oL fr pe

lie).

Checking for Short-Circuitsmeaure reitace betwee the

black ad gree lead ad betweethe white ad gree lead (blue adgree lead fr 240-VAC at) ad

recrd thee belw. Thee eaure-et huld be ifiite h (ctiuity r oL fr pe lie). Acut r pich i the wire i idicated ba reitace value greater tha zer ble tha the at reitace.

If the reitace i t crrect, rif the wire ha bee cut r daaged,te the daaged area ad call thefactry fr further itructi.

Checking the Floor SensorThe sustat ctrl ce with a

flr er. Thi ut be teted prit itallati. Ue a qualitydigital heter that i capable feaurig at leat 20,000 h (W),ad eaure betwee the lead wiref the er. The eaureet variaccrdig t the teperature eedi the tip. The er reitace table page 6 give a et f apprxiatevalue fr cpari.

If reitace i detected, r if threitace value i very differet frthat hw i the er reitace

table, check the heter firt take ure it wa crrectly et. Thectact the factry fr aitace.

Record the information from this nameplatelabel into the Mat and Sensor Resistance Logprovided at right. Leave this nameplate labelattached to the power leads for later inspection.

This Electric Radiant Heating Warning Labelmust be cut out and taped near, or on the face

of the control.

To retain the Limited Warranty, resistance

readings and other data MUST be recorded inthe Mat and Sensor Resistance Log below. Usethe LoudMouth (right) to monitor the mat dur-ing the entire installation process.

The LoudMouth

Measure resistances


6/16

Circuit Overcurrent Protectionand GFCI Protection

The HeatWeave at ut be pr-tected by a grud fault circuit iter-rupter (GFCI). If the at are directly

pwered thrugh the sustat ctrl,thee already have a itegral GFCI tprtect the at (d t itall a GFCI


PART 2: Electrical Service Rough-intype circuit breaker t upply a sustatCtrl becaue the repective GFCIay cflict ad caue prble). If adifferet type ctrl r relay i uedthat de t have a built-i Cla A

GFCI, a idicatig-type GFCI circuitbreaker ut be ued t prtect theat. Thi GFCI breaker erve a alcal dicect.

NOTE: Follow all local buildingand electrical codes.

It i receded that the ytebe italled it w dedicated cir-cuit, directly fr the circuit breakerpael. Hwever, all yte aybe able t tap it a exitig circuit.Cult a electricia. make ure therei adequate capacity fr the at() a

well a ay ther ite that ay uethi circuit. The at() huld t beitalled i a circuit with ather GFCI(breaker r utlet), lightig circuit (lw-vltage, halge, r ther type thatue ballat r trafrer that caiterfere), r tr circuit (exhaut fa,ht tub, etc.) due t pible iterfer-ece which ca caue the GFCI thectrl t fale-trip.

The circuit breaker prtectig theat() ut be larger tha 20 ap.Lad the circuit breaker with retha the fllwig: 12 ap a15-ap circuit breaker, 16 ap a20-ap circuit breaker. Additialcircuit breaker will be required frlarger lad tha thee.

select at that re tha15 ap are ru thrugh a sustat rsustat Relay ctrl.

Large Systems on oneFloor-sensing Control

Fr yte that are t large t

directly pwer thrugh e sustat,but ut be perated by e flr-eig ctrl, ue the sustat/sustat Relay fr bet perfrace.Ctact a HeatWeave dealer r the fac-try fr re ifrati.

Install Electrical BoxesSunStat box. Decide the

lcati fr the flr-eig ctrl.Uually thi will be i the ae r athe flr beig wared, but it ca be

uted alt aywhere a lg a iti t i a cfied pace where airflwi retricted. T reach thi bx with theat, the at pwer lead ad the e-r wire lead ca bth be exteded ifeeded with the apprpriate ize wireat a jucti bx.

The ctrl electrical bx ay bea igle-gag platic deep bx, butbe ure t fllw all electrical cderequireet fr bx fill, grudig,etc. whe deteriig the crrect bxfr a particular applicati.

The ctrl bx huld be lcated iterir wall, typically 60 fr theflr, accrdig t cde requireet.

NOTE: The SunStat sensor wirecan be up to 50 ft. long, extendedwith 22- or 24-AWG wire.

SunStat Relay boxes. The sustatal ay be ued a a ater t ctrlsustat Relay. The sustat Relayay be lcated t aywhere a lga they are t i a cfied pacewhere airflw i retricted. T reachthee ctrl with the at, the atpwer lead huld firt g t a juc-ti bx (ee page 9) ad the t arelay. (ee itructi prvided withthe sustat Relay ctrl). There i flr er fr thee relay.

Other junction boxes: It i highlyreceded that a eparate teelelectrical jucti bx be utedbelw the ubflr r i the wall i alcati t which the at pwer leadca be ruted. A eparate wirig drpca be ade fr the ctrl bx

dw t thi jucti bx. Thi akeit uch eaier t itall the yte.

Bottom Plate WorkDrill a hle up thrugh the wall

btt plate t rute the pwer wirigfr the ctrl bx t the at belwthe flr.

Rough-in WiringItall electrical wirig fr the

pwer urce breaker t the ctrlelectrical bx, ad the t the jucti

UnderFloor Mat Sizes, AmperageDraw, and Resistance Ranges.

Aperage Reitace

mat size Draw Rage (h)

120 VAC12 x 5.5 ft. 0.4 247302

12 x 8 ft. 0.6 167204

12 x 10.5 ft. 0.9 121148

12 x 13 ft. 1.1 9711912 x 16 ft. 1.3 8098

12 x 19 ft. 1.5 6782

16 x 4 ft. 0.4 258315

16 x 6 ft. 0.6 173211

16 x 8 ft. 0.8 126154

16 x 9.5 ft. 1.0 101123

16 x 12 ft. 1.3 82101

16 x 14 ft. 1.5 6985

16 x 16 ft. 1.7 6378

16 x 18 ft. 1.9 5365

16 x 19.5 ft. 2.1 4556

19.2 x 4.5 ft. 0.7 17020719.2 x 6.5 ft. 0.9 127155

19.2 x 8 ft. 1.0 103126

19.2 x 9.5 ft. 1.3 83102

19.2 x 11.5 ft. 1.5 7187

19.2 x 13 ft. 1.7 6378

19.2 x 14.5 ft. 1.8 5466

19.2 x 16 ft. 2.1 4556

240 VAC12 x 10.5 ft. 0.4 500611

12 x 16 ft. 0.6 336411

12 x 21 ft. 0.9 243297

12 x 26 ft. 1.1 195238

16 x 8 ft. 0.4 521636

16 x 12 ft. 0.6 362443

16 x 16 ft. 0.8 253310

16 x 19.5 ft. 1.0 207253

16 x 24 ft. 1.3 168206

19.2 x 6.5 ft. 0.4 526643

19.2 x 9.5 ft. 0.6 359439

19.2 x 13 ft. 0.9 256313

19.2 x 16 ft. 1.0 207253

19.2 x 19 ft. 1.3 167204

19.2 x 23 ft. 1.5 143174

19.2 x 26 ft. 1.7 127156

Floor Sensor Resistance Values

Teperature Typical Value

55F (13C) 17,000 h

65F (18C) 13,000 h

75F (24C) 10,000 h

85F (29C) 8,000 h


7/16

bx belw the flr fr the at lead.Leave 68 f extra wire at the ctrlbx ad jucti bx. Refer t the wir-ig diagra i Part 6 fr aitace.

Install SunStat SensorA flr er ce with the

sustat ctrl ad ut be italledcrrectly t ctrl the flr tepera-ture. Reeber t lcate the er ia flr where a at i lcated. The fl-lwig are receded ethd fritallig the er. other equivalet

ethd ay be ued.

Before installing the sensor, makesure to test it with an ohmmeter.See page 5, Checking the FloorSensor.

Method 1. sice a er aybe difficult t itall i e exitigflr, the er ay be placed uderthe ubflr. Hwever, keep i idthat the teperature the er give

will t be a true flr urface tepera-ture ad the flr-eig ctrl ayeed t be adjuted accrdigly.

Drill a hle thrugh the btt platef the wall t rute the er wire.Feed the er wire dw fr thectrl bx thrugh the flr. (A fih-tape ay eed t be ued i rder td thi.)

The t accurate ethd i t drilla 3/41-lg hle at a agle itthe btt f the ubflr (drillig ata agle prevet pucturig thrugh

flr urface). Lcate thi hle i a


jit bay directly ver where a at willbe italled, abut 2 fr the jit.Iert the er it the agled hlead eal it with adheive. Iulate theer with additial bluebard rfibergla iulati, 12 thick ad 6quare, adhered ad ealed uder theer. Thi will ilate the er frthe heated jit pace ad give a truerflr urface teperature.

Method 2. If it i t pible tdrill a hle t et the er i the ub-flr, it ay be held flat t the ubflr

with a yl wire clip. Lcate the e-r i a jit bay directly ver wherea at will be italled, abut 2 frthe jit. Iulate the er with addi-tial bluebard r fibergla iula-ti, 12 thick ad 6 quare. Thi willhelp ilate the er fr the heatedjit pace.

Method 3. If pible, itall theer directly it r uder the flrcverig area.

If the flr urface i tiled, a grut lieca be reved ad the er laid it

thi grut lie.Drill a hle it the wall behid the

baebard tri area ad directly belwthe ctrl electrical bx.

Feed the er thrugh the kck-ut,dw t the hle that wa drilled ear theflr, ad ut it the flr abve wherethe heatig at will be italled. Lcatethe er at leat 1 ft. fr utide wallad ear the ceter f a jit pace.

Cplete the ret f the itallatibefre cverig r regrutig ver theer.

Method 3: Remove the grout 1/4 to 1/2deep. Install sensor. Reinstall grout over thesensor and sensor wire.

Subfloor

Floor surface

Sensor tipBead of constructionadhesive

Angled hole drilledfor floor sensor

Floor joist

Minimum 1-thickinsulation

Insulation (6 square)

Diagram showing Method 1 for installing the floor sensor into the subfloor.


8/16


PART 3: Install the Matsee Part 6 fr typical wirig dia-

gra.oberve the fllwig rule, plu all

ther electrical/buildig cde ad theCauti Page 4 whe itallig the

at():Do not allow the foil radiator ofthe mat to be m ounted such thatit contacts metal objects such asnails, staples, metal pipes, heat-ing ducts, and joist straps.

Keep the mat at least 2 awayfrom recessed fixtures (lights,etc.), ventilation openings, andother openings.

Keep the mat at least 8 away

from the edges of outlet boxesand junction boxes used tomount surface lighting fixtures.

Keep the mat at least 6 awayfrom heat-sensitive items such astoilet rings, flexible ducting, andother items rated less than 194F(90C). Consult manufacturers ofthose items.

REMEMBER:Pay careful attention to areaswhere ductwork, wiring, or other

items do not allow the mat tobe installed. Keep in mind thatwhere mats are not installed, thecorresponding floor area abovewill not get very warm.

Befre itallig the at, ipectall jit a well a the uderide fthe ubflr fr ail, crew, r therharp bject that prtrude it the

Test fit the mat between the joists before

stapling the mat to the joists.

1. meaure betwee the flr jitwhere at() will be italled. meaurethe width f the at elected t fitbetwee thee jit. The differecebetwee thee eaureet deter-

ie hw uch at eh reaifr taplig t each ide f the jit.Becaue the ditace betwee flrjit ca vary, takig thee eaure-et will help eure the at will becetered betwee the jit. It i alprudet t tet fit the at by hldigthe at up it the jit cavity.

2. If the at begi ear the ri jit,eaure abut 6 ut fr that rijit. Thi will allw eugh r frthe at pwer lead, ad will prevetueceary heatig f the wall cavity

abve the flr.

3. meaure 2 belw the ubflr adark the jit bth ide f thejit cavity.

4. T help hld up the pwer leadwhile itallig the at, fate enailTite ver the pwer lead

5. Hld the at up alg e jitad begi taplig the at eh algthe 2 ark fr the ubflr. stapleevery 4 t 6 fr abut 2 ft. t get

tarted.

jit cavity. Thee ite ca daagethe at, ad ut be reved, cut ff,r bet flat agait the uderide fthe ubflr r the ide f the jit().

D t taple, cut, r daage the

filed heatig prti f the at i ayway. The fiber eh f the at i theprti that will be ued t taple theat t the jit.

Do not leave the mat rolled up orbunched up in any way in the joistbay. Doing so will cause dangerousoverheating and possible damage.Mats must be installed so that theyare completely flat across the joistcavity.

1.

2.

3.

4.

5.


9/16


6. At the ther ed f the at, placea ail it the jit at 2 belw the ub-flr. Hag the fiber eh f the att the ail. Thi will ake it ucheaier t taple the ret f the at.

7. Ctiue taplig the at eh at

2 belw the ubflr, every 4 t 6.The reve the ail at the ed thatheld it up.

8. Raie the at t the ther jit adtaple the at eh 2 belw the ub-

flr.

9. Uig the ae techique, taple up all ther at.

Power Lead InstallationIf t already de , ut a juc-

ti bx belw the ubflr withireach f the at pwer lead. Itallre tha e jucti bx, if eeded,fr larger jb. The junction box mustremain accessible i accrdace with

electrical cde, cider the lca-ti f the jucti bx carefully huldthe ceilig be fiihed after itallatif the at().

Rute the pwer lead fr theat() t the jucti bx fllwigall electrical ad buildig cde uig

Junction box with multiple sets of mat lead wires, connected in parallel, and connected to the

power supply.

cduit ad additial electrical bxewhere required.

Fr ultiple at, fllw all electrical cde ccerig bx fill axi-u. Cect the lead i parallel(black-t-black, white-t-white), adt i erie.

Cect the at lead t the pwedrp fr the ctrl electrical bx sustat Relay.

Agai, d t verlad the ctrlThe sustat ad sustat Relay ctrut t be laded with ver 15 apf at.

6.

7.

8.

9.


10/16

Install the ControlItall the ctrl() fr the at

accrdig t the wirig diagra pr-vided with the ctrl. see the dia-gra are hw page 1113.

Cect the pwer upply lead,the pwer drp t the at juctibx, ad the flr er wire t thesustat. Fllw prper wirig prce-dure.

It i a gd idea t verwrap thewire ut with electrical tape t furtherecure the wire it the wire utbefre puhig the ctrl back itthe electrical bx.

If a sustat Relay i ued, cectthe pwer upply lead ad pwerdrp fr the at t the relay. Ru a

2-wire 22-gauge r 24-gauge wire, riilar lw-vltage cable, t cectthe Relay() t the ater sustat.Cect the flr er wire t theater sustat.


PART 4: Final WiringTest the System

After the ctrl are italled adcected, eergize the yte brieflyt tet perati f all cpet.

Refer t the itallati heet pr-

vided with the sustat fr prperettig.

Withut flr iulati, the at willt heat the flr. Whe the sustatcall fr heat t the at, the at willbegi t feel war t the tuch withi1 t 2 iute r . If thi de tccur, recheck the sustat ettig,wirig cecti, ad pwer upply.

Apply the Warning LabelApply the Radiat Heatig Warig

Label (pg. 5) t the ctrl r earby

lcati.

Itall R-13 t R-19 fibergla iula-ti belw the at. Getly pre theiulati up t the at fr bet reult

ad ecure i place with rd, taple,r ther ethd. A gap betwee theiulati ad at i acceptable butwill t give the bet heatig reult.

make ure t iulate at the ed fall heated jit cavitie. Itall iula-ti vertically i thee area t sealthe ed f the heated jit area r,6 after the at tp i a jit pace,puh the iulati up tight agaitthe ubflr ad taple t the ubflr.Thi eure that heated air caecape fr the heated jit pace.If thi i t de, uch heat willecape hriztally thrugh badjit, ri jit, exterir wall, adpe ed f jit pace, ad the flrwill t war a it huld.

seal peig arud pipe, watelie, duct, jit blckig, ad all thergap with ilice caulkig r urethaefa.

PART 5: Install the Insulation

The mat power leads and sensor wire connected

to the control at the electrical box.

REMEMBER: Proper insulating and sealing of the floor cavity is necessary forthe performance of HeatWeave UnderFloor mats.


11/16


PART 6: Wiring DiagramsTypical Electric Wiring Diagram with SunStat Control (120V/240V)Dedicated 120-V, 20-ap (axiu) circuit fr 120V at ,r dedicated 240V, 20-ap (axiu) circuit fr 240V at

(ut be GFCI prtected ule a GFCI sustat i ued).

All electrical wrk ut be de by a qualified liceed electricia i accrdace with lcal buildig ad electrical cde, a

the natial Electrical Cde (nEC), epecially Article 424, Part IX f the nEC, AnsI/nFPA70 ad secti 62 f CEC Part 1.

Ground

Black Black

Black

WhiteWhite White

Line 1

Load 1

Load 2Line 2

120 VAC or 240 VACSensor Wire

(no polarity)

UnderFloor Mat

(maximum 15 amps)120/240 VAC

SunStat Control

CAUTION: Make sure 120 VAC

is supplied to 120VAC mats and240VAC is supplied to 240VAC

mats. Otherwise, dangerous

overheating and possible fire

hazard can result.

Two or more120 VAC or

240 VAC Heating Mats

(maximum 15 amps)

CAUTION: Make sure 120 VAC

is supplied to 120VAC mats and

240VAC is supplied to 240VAC

mats. Otherwise, dangerous

overheating and possible firehazard can result.

Ground

Black Black

Black

White

White White

Line 1

Load 1

Load 2Line 2

120 VAC or 240 VAC

SensorWire

(no

polarity)

120/240 VAC

SunStat Control

Connecting two mats

UnderFloor Mat

(maximum 15 amps)

UnderFloor Mat

(maximum 15 amps)


12/16



(maximum 15 amps)

Ground

Black Black

Black

WhiteWhite White

Line 1

Load 1

Load 2Line 2

0 VAC or 240 VAC

SensorWire

(no

polarity)

120/240 VAC

SunStat Relay



(maximum 15 amps)

Ground

Black Black

Black

WhiteWhite White

Line 1

Load 1

Load 2Line 2

120 VAC or 240 VAC

SensorWire

(no

polarity)

120/240 VAC

SunStat Control

12 HeatWeave UnderFloor Installation ManualSunStat and Relay Connection DiagramsDedicated 120-V, 20-ap (axiu) circuit fr 120V at ,r dedicated 240V, 20-ap (axiu) circuit fr 240V at

(ut be GFCI prtected ule a GFCI sustat i ued).

All electrical wrk ut be de by a qualified liceed electricia i accrdace with lcal buildig ad electrical cde, ad


Use size 18- to 24-gage 2conductor wire to connect

SunStat to Relay.

UnderFloor Mat

(maximum 15 amps)

UnderFloor Mat

(maximum 15 amps)

UnderFloor Mat

(maximum 15 amps)

UnderFloor Mat

(maximum 15 amps)


13/16


All electrical wrk ut be de by a qualified liceed electricia i accrdace with lcal buildig ad electrical cde, a


Relout

2

3

4

5

Relin

Relin

Relout

2

3

4

5

Relin

Relin

Relout

Setback

Sensor

2

3

4

5

R

elout

Relin

Relin

R

elout

Relin

Relin

R

elout

120/240 VAC

SunStat Relay

120/240 VAC

SunStat Relay

Up to 10 SunStat Relays

can be connected to

one SunStat Control

120/240 VAC

SunStat Control

Diagram for connection of signal wire between SunStat and Relays


14/16


Illustrations showing how to connect the LoudMouth monitor to two mats (left) , and how to connect the LoudMouth to

three mats (right). The LoudMouth can monitor no more than three mats simultaneously. Do NOT leave the power leads

connected in series like this when making final wiring connections; the mats will not heat sufficiently. When making final

wiring connections, mats must be wired in parallel.

How to Connect the LoudMouth Monitor to the Mat Power Leads


15/16

ProblemMat resistance measurement isoutside the range printed on thenameplate label.

Floor is not getting warm.

Floor heats continuously.

Control is not working correctly.

Control is not working at all.

GFCI conflicts and false-trips.

Possible CauseA aalg heter (uig a vig eedle)wa ued t take the readig.

If eaureet hw a pe r hrt circuit,the heatig wire ha bee daaged.

If eaureet i jut a little lw r high, rteperature ha affected the reitace.

The at ay be wired i erie r daiychaied with ather at, r ay be wired iparallel with ather at. Either will prvidefale reitace readig.

mat heatig wire ha bee daaged.

GFCI ha tripped, idicated by a light thectrl. Light ay be labeled GFI, ay bebelw the wrd stad by, r the buttlabeled Tet.

Icrrect vltage upplied, r iatchedelectrical cpet ued.

mat are wired i erie r daiy chaied(ed-t-ed).

Flr er i le r brke. If ctrl ha adigital diplay, it ay idicate Lo.

Icrrect wirig. The ctrl wa bypaedwhe it wa wired t the pwer upply.

Defective ctrl.

If a prgraable ctrl, the prgraigay be icrrect.

Icrrect vltage upplied, r iatchedcpet ued.

Flr er i t wired prperly, r i twrkig prperly.

Le cecti() lie ide ad/r ladide f ctrl.

n pwer i upplied.

Flr er i t wired prperly, r i twrkig prperly.

Defective ctrl.

mre tha e GFCI the circuit.

Le wirig cecti().

A electric tr r a ballated light urce iharig the circuit with the ctrl.

Solutionobtai a digital heter able t read 0 t 20,000 h ad reeaure the reitace.

Recrd reitace betwee all wire ad ctact the aufacturer.

make the r teperature 7585F, r ctact the aufacturer.

make ure reitace eaureet are fr ly e at at a tie. Dicect ay ther a

meaure at reitace. Check fr bth pe circuit ad hrt circuit a detailed earlier i aual. If daaged, recrd reitace betwee all wire ad ctact the aufacturer.

Check fr le wire cecti. Reet the GFCI the ctrl r circuit breaker. If it trip agcheck fr a hrt circuit i the at a detailed earlier i thi aual. If at i daaged, recrdreitace betwee all wire ad ctact the aufacturer. If at i t daaged, replace thGFCI ctrl. Al ee GFCI cflict belw.

meaure lie vltage, the eaure lad vltage. Bth 120-V at ad ctrl have blacad white lead. 240-V at have black ad blue lead.

multiple at ut be cected i parallel (r black-t-black, white-t-white).

Pull the er wire le fr the ctrl ad reiert the. If thi de t lve the prble the er wire fr the ctrl ad eaure reitace acr the er wire. Fra HeatWeave ctrl er the reitace huld be betwee 17,000 h (at 55F/13C) ad8,000 h (at 85F/29C). see er wire reitace value page 6.

make ure wirig cecti are crrect. Cult the wirig diagra the back f the cthe itructi that cae with the ctrl, r the wirig diagra i Part 6 f thi aual take ure the fur cecti are crrect.

Retur ctrl t dealer fr replaceet.

Carefully read ad fllw ctrl prgraig itructi.

meaure vltage at the ctrl ad ake ure it atche the ctrl vltage ratig, ad the vltage ratig. make ure electrical cpet are cpatible. 120-V at have black adwhite lead. 240-V at have black ad blue lead.

make ure ly e flr er i cected t the ctrl. Al ee ser i le rbrke abve.

Reve ad reitall the wire ut at each cecti. make ure the wire ut are tight.Check all cecti back t the breaker.

Check circuit breaker. meaure vltage at the ctrl. Check all cecti betwee breakead ctrl.

The ctrl ca ly read the igal fr a igle flr er. make ure ly e flr ecected t the ctrl. Al ee ser i le r brke abve.

Retur ctrl t dealer fr replaceet.

GFCI uit will etie trip whe there i thig wrg with the equipet the circuitbut whe there i re tha e GFCI the ae circuit. Rerute pwer t avid havig tha e GFCI the circuit.

Reve ad reitall the wire ut at each cecti. make ure the wire ut are tight.Check all cecti back t the breaker.

Electric tr ad ther electrical device ca caue a GFCI t fale-trip. Ru a dedicated circt the flr-warig yte.


If prble arie with the HeatWeaveUderFlr at r it related electri-cal cpet, pleae cult thitrublehtig guide. If t qualifiedt perfr electrical wrk, it i highly

receded that a qualified, liceedelectricia be hired.

Ay electrical trublehtig wrkhuld be perfred with the pwerreved fr the circuit, ule ther-wie ted.

Althugh thi trublehtig guide

i prvided t ait with prbleexperieced with a HeatWeave flr-

warig yte, reult are ever guateed. HeatWeave de t aueay liability r repibility fr da-age r ijury that ay ccur fr uithi guide.

If prble with the yte peritcall the aufacturer at 800-276-2419

PART 7: Troubleshooting Guide


16/16

mat layut grid ue thi t draw a caled layut f the r t be heated. = ___

Watt Radiat, Ic.

4500 E. Prgre Place

sprigfield, mo 65803-8816

800-276-2419 (tll-free phe)

417-864-6108 (phe)

417-864-8161 (fax)Cpyright 2008 Watt Radiat, Ic. HeatWeave UderFlr Itallati maual HWUFmAn0508 Effective 05/01/2008

HeatWeave prduct are pateted uder freig ad U.s. patet icludig uber 6,303,905, 6,300,598, ad 5,908,573.

E l e c t r i c R a d i a t F l r W a r i g

Documents

Watts Radiant HeatWeave Under Floor Manual-En-20080501