4 which disengag es the control circu it when the heating sy stem water pressure dec reases (when there is not enough
water in the heating system ). When the system becom es replenished with water, th e boiler automatically re launches
operation. Proper deaerati on of the heating system must be assured prior t o launching and also during boiler
operation. The hea ting system bleeding is partially ensured by the autom atic vent v alve which is placed a t the outlet
of heating w ater from the b oiler body.
♦ Selected impor tant characteristi cs and meri ts of THERM- EL electr ic boilers:
• t o p m i c r op r o c es s o r c o n tr o l
• d i g i t a l 3 - c h a r a c t e r LE D d i s pl a y ( d i sp l ay s s e l ec t ed te m p e r a tu r es , p r e s su r e , o u tp u t , e r ro r a n d o t h e r m e s s ag e s ) o r to u ch L C D
d is p l a y ( d i sp l ay s al p h a - n um e r i c s e le c te d t e m pe r a t u r es , p re s s u r e, o u t p u t , e rr o r an d o t h e r m e s s ag e s )
• v e ry qu i e t o p e ra t i o n ( s w i tc h p o w e r r e l ay o f t h e h e a ti n g b o d ie s )
• s t a t e-of- t he - ar t d e s ig n
• e r go n om i c , i n te r ac t iv e c on t r ol
• f l ue n t r eg u la t io n b y 0 . 5 k W ( EL 5) , 1 k W ( E L 9 ) , 1 . 5 k W (E L 14 ) a n d 2 . 5 k W fo r l o w e r ou t p u t s e r ie s E L 8, 1 5 , 2 3 (5 k W f o r
u pp e r o u t p u t s e ri e s – E L 3 0 , 3 8 an d 4 5 )
• s e rv i c e- a dj u s t ab l e pu m p d e c el e r a ti o n
• p r ot e c t i o n of t h e pu m p ag ai n s t p a r t ic u l a t e b u i l d-up
• P I D re g u la t io n
• a n t i- f re e z e p r o te c ti o n
• D H W h ea t in g op t io n ( te r m i n a l s f o r a n e x t e r na l t h re e - w ay v al v e, N TC t em pe r a tu r e se n s o r o r a s to r a g e t a n k th e r m o s t at )
• o p ti o n a l c o n n e c ti o n o f a n e xt e r n al N TC se n s o r ( in t e g r at e d e q u it h e r m re g u l a ti o n )
• c o n n ec t i o n o f a n N TC t e m pe r a t u r e r oo m s e n so r (a u to m a ti c co n t r o ll i ng sy s te m a s a r oo m r e g u la t o r )
• i n t eg r a t e d sa f e t y s w it c h c o n t a c t or f o r a l l o u t pu t p h a s e s
• p o s s ib i l i ty o f a n i n t e l li g e n t c a s c a d e b oi l e r c o n n e c t i on f o rm a t (u p to 3 2 b o i l er s – w i t h s m o ot h o u t p u t m od u la t i on )
• o p ti o n a l e x t e rn a l c o n tr o l b y m ea n s o f G S M ( ex t e rn al m od e m n e c e s s a ry )
• o p ti o n a l c o n n e c ti o n o f a n e xt e r n al r e g u l a to r w it h O pe n T h er m co m m un i c a ti o n
• b a la n c e d lo a d i n g o f t he h ea t i n g b ar s a n d b o d ie s
• p o w e r r e l a ys d o n o t f o rm p a r t o f t h e p r o c e s s o r b o a r d p r i nt e d c ir c ui t s ( e a s y s er v ic i n g a n d r ep l a ce m en t ) . S p ec ia l r e l a y s w i t h
i n t eg r a t e d f as t on s w e r e u s e d , i .e . h i g h c u r r e nt s d o n ot f l o w t hr o ug h p r i nt e d c i r c ui t s.
• b o il e r s t ar t s y s te m f u n c t io n i n g o n t h e b a si s o f a m as s r e m ot e c o n tr o l ( MR C )
• e x te r n a l c o n t ro l o f e n e rg y in p u t ( r e l i e f r e l ay )
• s o ft s t a r t
• i n t eg r a t e d G r un d f o s UP S 1 5 /6 0 p u m p
• i n t eg r a t e d 7 l e x p a n si o n v e ss e l (w i t h t h e lo w e r p e r f o rm a n c e s e r i e s )
• i n t eg r a t e d sa f e t y v a lv e
• a u to m a ti c b l e e d i ng
• d i gi t a l h e a ti n g w a te r p r e s su r e se n s o r ( f i t te d w it h a l l ty p e s )
• a u to- d i ag n o s t ic s , u n e qu i v o c a l s e r v i ce no t i fi c a t i on o f d e f ec t s
• o p ti o n a l b o il e r p a r am e t er ad j u s tm en t ( ri c h s e rv i ce m en u )
• t h re e- di g it d i sp l ay ( d i sp l ay s s e l ec t ed te m p er a tu r e s , p r e s su r e, ou t p u t , e rr o r m e s s ag e s et c . )
• f u r t h e r 7 L E D s fo r u n eq u i v o ca l s i g n a ll i n g o f t h e o p er a t io n a l c o n d i ti o ns
• o p ti o n o f a d efa u l t s e t t i ng ( i m m e di a te c h an g e o f o p e ra t io n i n t o t h e fa c t o ry s e t ti n g s m od e )
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