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WD51/2/1997 Chapter 5 : Fault Finding
5.3
CONTINUITY CHECKING
Is th er e 2 3 0 V a t te r m in a l L ?
Is th er e 2 3 0 V a t th e O N / O F F
I s th er e 2 3 0 V a t th e b o ile r
the r m o s ta t ( b oth t e r m in a ls ) ?
Is t h er e 2 3 0 V a t th e f lo w
ov er h e a t th e r m o s ta t ( b o th
Is th er e 2 3 0 V a t th e th e r m al
f us e l in k ( b o th ter m in a ls ) ?
Is th er e 2 3 0 V a t th e f lo w hi g h
I s th er e 2 3 0 V a t th e w a te r
pr e s s . s w itc h ( b o th te rm in a ls ) ?
pr o te c tio n th e r m o s ta t (b o th
Is t h er e 2 3 0 V a t th e g a s lo w
pr e s s . s w itc h ( b o th ter m in a ls ) ?
Installation & Servicing Instructions
ST A R T
ye s
s w itc h ( b o t h te rm in a ls )?
ye s
ye s
ter m in a ls ) ?
ye s
ye s
lim it t h e r m o s t a t ( b o th
ter m in a ls ) ?
ye s
ye s
Is th er e 2 3 0 V a t t h e flu e
ter m in a ls ) ?
ye s
The Keston 170 Condensing Boiler
T o c h e c k c o n t in u it y c o n ne c t o n e pro b e t o a n e u tr a l
an d us e th e o th e r pro b e to c he c k f o r 23 0 V .
n o
C h e c k e x te r na l c o n tro ls .
n o
F a u lty s w itc h - R e p la c e .
B o ile r is u p to t e m p e ra tu r e .
n o
A llo w to c o ol O R p u m p n o t
ru n n in g O R fa u lt y th er m o s ta t -
n o
T h e r m os t a t t ri pp e d - r e s e t O R
fau l t y th e rm o s ta t - R e p la c e .
n o
H ig h c a b in e t te m pe r a tu r e -
c h ec k a ll jo in t s for p r o d u c ts
le a k a g e - R e p l ac e th e r m a l f u s e
n o
H ig h w a te r t e m p e r a tu r e O R
fau l t y th e rm o s ta t - R e p la c e .
n o
C h e c k w a te r le v e l h e a d e r
tan k / s y s t e m pr e s s u r e O R fa u lty
s w it c h - R e p la c e
n o
T h e r m os t a t t ri pp e d - r e s e t O R
fau l t y th e rm o s ta t - R e p la c e .
no
C h e c k g a s s u p p ly t o b o ile r O R
f au l ty s w itc h - R e p la c e .
R e p la c e
Page : 29
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