DORCHESTER DR-RS 105, Инструкция по установке, наладке и обслуживанию

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is
Instruction
m
anu
al
DR-
R
S
56
Wa
rn
in
g
Ma
intena
nce may
o
nly be pe
rformed
b
y a
qu
alifie
d se
rvi
ce and main
te
nance
e
ngin
eer
.
8.4
T
rou
b
lesh
oot
ing
t
a
ble ’no hot
wat
e
r’
If the
wa
te
r he
ater
fai
ls to
sup
ply
any
hot
water
, there are severa
l p
ossibl
e ca
uses.
Refer to
table
Ta
ble
8.3
No hot water
.
Ta
b
le
8.
3
No
hot
water (Sh
eet 1
o
f 2)
Symptom
C
ause
So
lu
tio
n
R
emar
k
No
at
tempt to st
art
the
h
eating
cycle
No volt
age
fro
m
p
ower
su
ppl
y.
1.
C
heck tha
t the isol
ator
is
ON.
2.
C
heck the
vo
lta
ge across th
e isola
tor
.
3.
C
heck the
vo
lta
ge on the ele
ctrica
l co
nne
ctor blo
ck.
4.
C
heck the
vo
lta
ge on the bu
rn
er co
ntrol.
5.
C
heck
the
fuse
in
the
bu
rner
control.
T
he measure
d vo
lta
ge must
b
e
2
30 V
A
C +15
%
-1
0%.
Se
e appe
ndi
x
A
E
lectrical dia
gram DR-RS
. If
you cannot
re
solve
the
e
rro
r, cont
act you
r in
st
al
ler
.
No
at
tempt to st
art
the
h
eating
cycle
(bloc
king e
rror)
T
he ai
r pr
essu
re
sw
itch
d
oes not cl
ose.
1.
Bl
ockage
in
the
flue
g
as d
ischarge
o
r ai
r sup
ply:
•
T
ra
ce
th
e
bl
ocka
ge
.
•
Remove the blo
cka
ge.
2.
Defectiv
e air pressure
switch
•
C
heck th
e wiring
o
f the air pressure
swi
tch.
•
Check th
at
the ai
r
pre
ssu
re sw
itch
is
wo
rki
ng prop
erly
.
If the e
rro
r has b
een
correcte
d,
the wa
te
r hea
ter
will
automatical
ly
re
sume
ru
nni
ng
whe
n the
re i
s a
he
at d
emand
.
If the
e
rro
r can
not b
e
resolved
o
r is
pe
rsi
sten
t,
cont
act you
r
in
st
a
lle
r.
Br
e
ak
in
th
e
therm
o
st
at circuit
s.
1.
C
heck tha
t the control thermo
st
at i
s
switched
(clo
sed).
2.
C
heck the
leads an
d se
nsors of
the
con
trol
a
nd
hig
h-limit
ther
mos
tat
s.
Rep
eate
d
st
arting
of
the
h
eating
cycle
(cyc
ling
of wa
te
r
he
ater)
To
o m
u
ch resist
ance in
the
flu
e gas di
sch
arge
(th
e
ai
r pr
essu
re
sw
itch
o
pens
du
ring
heatin
g).
1.
C
heck tha
t the chimne
y
in
st
al
lation
h
as been
con
structed
in
co
mp
lian
ce with
the
d
irections. See p
arag
raph
3.9
A
ir suppl
y
a
nd flue ga
s di
sch
arge
.
If the
e
rro
r can
not b
e
resolved
o
r is
pe
rsi
sten
t,
cont
act you
r
in
st
a
lle
r.