Omega LVN-141/LVN-142 Owner's manual

LVN-141/LVN-142

Vertical Level Switch

Installation:

A s t a ndard N P T fem a l e b o s s in tank top , bottom o r s i d e is al l

that i s r e q u i r ed. U n i t s o p erate i n an y a t t i t u d e - f r om t h e verti-

cal t o a 30° i n c l i n ation - w i t h le a d wires up or d o w n . Stand ard

IP S pipe e xtends uni t s to an y i n t e rm e d i a t e l e v el in the t a n k .

Moisture Protecti on: W hen moisture e x i s t s in co nduit and

ext ension p i p e s , th e p o t ential f o r this m oisture to " wick " down

the wi re leads a n d i n t o t he s w itch assem bl y e xi s t s . S h o uld

this h a p p e n, t h e s wi t c h wi l l appear t o b e c l o s e d d u e to a hi g h

resistance p a t h thr o u g h the moisture. Th e f o l l o wi n g su gges-

tions ma y h elp to p reve n t t h i s f r o m happen i ng:

1. Pitch conduit a wa y f r o m t h e level s wi tc h, so t h a t c onde nsa-

tion wi l l drip a wa y fr o m t h e l e v e l swi tch assem b l y.

2. W h en a vertical r un of e xt e n sion p i p e i s use d to e xtend a

level s witch do wn f r om t h e top of the t a nk , a n on -conductive

silicone oi l sho u l d be u s e d t o fil l th e verti cal run. A l t e rnative-

l y, an a p propriate p ot t i n g m a y be u s e d to fi l l the v e r ti c a l run

to oc cupy the spac e i n w h i c h c ondensati o n w i l l n o r m a l l y f orm.

CAUT ION LVN - 1 4 1 an d LVN -142 level p r oduc ts i n c orp orate a

potti ng c a p o r ar e full y po t t e d. Due to t he bondin g cha racter -

istics o f the p o t t i ng to t he wi re l ead s , the r e is n o wa y of as-

suring a water -tight s eal at t h e p o t t i n g j oi n t. Our p otting c ap

wi l l resis t m oisture to s o m e deg r ee, b u t t he pr e c a u t i o ns m e n -

tioned a b o v e s hou l d b e u s e d t o as s ure m oi s t u re does n't enter

the s witch and cause a s ho r t .

Thread Tr e a t m e n t 1. Sealing: W hen th r eadin g metal th r eads

into a me t a l co u p l i n g , pipe s ea l a n t or PFA tap e is r e c o m m end ed. Due to pote n ti a l com patibi l i t y pr o b -

lems, when s eali ng pl a s t i c t h r e aded units, a c om p a t i b l e p i pe sealant is recomm e n d ed.

2. T i g h t eni ng: W h e n t h r e a di n g a p l a s t i c level s witch i nto a m e t a l c o upl i n g, t h e i nstal l e r s h ould u s e a suita b l e wr e n c h an d

tighten t h e threads o n e to o n e a nd one half ad d i t i o n a l t u r n s p a st hand - t i g h t . O v e r - t o rquing o f t he t h r e ads w i l l r e s ult in

damage to the plastic m o untin g plug.

Electrical Data

See T ypi cal W i r i n g D i a g ram . C o n nect lead wires to l o ad circuit, usi ng app roved

method. Caution: See s peci fi c a t i ons above and “S witch R ati n g s ” b e f o r e con-

necting p o wer.

Standard r e ed s wi t c h es i n OME GA l e v e l s w i t c h units are herm e t i c a l l y - seale d ,

magneticall y a c t u a t ed, m a k e -and- b reak t ype . S wi t c h es a r e S P S T or S P D T a n d

are rat e d in Volt - Am p s (VA). See t h e a d j acent chart for ma xim u m l o a d charac-

teri stics of O ME G A l e v e l s wi tches. CA U T ION : C ontact protectio n i s r e quired for

tran s i ent or hig h i n -rush current . C o n t ac t O ME GA for more detai l s .

Europea n Pressu r e D i r e c t i v e A d dendu m

The product is desig n ed a n d m anufac tured in acc o r d a n c e with S o u n d E n g i n e e r i n g P rac-

tice as def i ned b y th e P r es s u r e

Equipment D i r e c t i v e 9 7 / 23/EC. This p r o d uc t m u s t n ot be used a s a “safet y access o r y” as

defined b y th e P r es s u r e Eq u i p m e n t D i r e c t i v e , A r t i c l e 1, Pa r a g raph 2. 1 . 3 . The p r esenc e

of a C E Mark on th e uni t d o e s n ot re l ate t o the Pr e s s u re E q u i p m ent Directive.

This pr o d u c t is suita bl e fo r Cl a ss I an d Class II ap p l i c a t i o n s o n l y, pe r th e re -

quirem ents of s t a n d a r d E N6 073 0 a n d any additional sp e c i f i c requirem ents fo r a

part i cular applicati on o r m ediu m b e i n g s e n s e d. Class I c o m p l i anc e of metal b o d i e d units requ i r e s a g r o und c on-

nection b e t w e e n the metal b o d y an d the ea r t hing s ystem of t he i n s t al l a t i o n . Class I com pl i a n c e o f plastic bo d i e d

units i n co ntact wit h a co n ducti v e medium requires that the me d i u m be ef f e c t i v e l y ear t h ed s o as to pr o v i d e an

eart h e d barrie r b e t we e n the u n i t an d accessible ar e a s . F o r Cl a s s I I I c o m pliance, a suppl y at s a f et y e xt r a -low

voltage ( S ELV) m u s t be p r o v i d ed. P l e ase cons u l t t h e Fac t o r y fo r c o m p l i ance i nform atio n o n sp e cific part numbers.

Im port ant p o i n t s :

Product m u s t be m a i n t a i n ed an d i n s t al l e d i n s t ri c t a c c o r danc e w i th the N a t i o n al E l e c t r i c a l Code and O MEGA produc t cata-

log and i n s t ruction b ul l e t i n . F a i l ure t o o bserve this war n i n g c o u l d re s u l t i n serious injuri e s o r d a m ages.

An appropriat e e xp l o s i o n -proof enclosure o r i ntrinsicall y s afe i n t e r f a c e device m u s t be used f o r h a zardo us ar e a appl ica-

tions involving suc h things a s ( b u t n o t l i m ited to) igni t abl e m i xtu r e s , c o m b u s t i b l e d ust and flam m a b l e m aterials.

** * W ar n i n g : T o p r e v e n t i g ni t i o n of flam m a b l e o r c o m b u s t i b l e a t m ospheres, disc o nnect p o we r before se rvi c i n g .

Pressure a nd tempe r a t ur e l i m itations sho wn on i ndivi d u a l c a t a l o g pages and d r a w i n gs f o r t h e specifi ed level

swi t c h e s m u s t not b e e xc e e d e d . T h e s e pressures and t e m peratures t a k e i n t o consider a t i o n po s s i b l e s yst em surge pre s -

sures / t e m peratur e s and t h e i r f r e quencies.

Selection of materials fo r c om p a tibilit y with the media is c r i t i c a l t o t h e l i f e a n d o p erat i on of O ME G A l evel swi t c h es. Tak e

care i n the proper s e l e c t i o n of m aterials of construction; partic u l a r l y w etted m ate ri a l s .

Life expe c t anc y of s witch c o n t a c ts varies with appli c ati ons.

Am b i e nt tem p e ratur e c han g e s d o a f f e c t s wi tch set points, sinc e the spec i fic gravi t y of a li quid c an vary with t e m p e r a t u r e .

Level s witches h a v e b e e n d e s i g ned to resist shock a n d v i b r a t i o n; ho wever, shock a n d vi b r a t i o n should be m i n i m ize d .