10
C
om
po
ne
nt
s
to
ch
ec
k
S
ec
tio
n
of
th
e
m
an
ua
l
!
(n
ot
e
re
f.
in
br
ac
ke
ts
)
---
---
--- (8
)
--- (7
)
21
.1
20
.2
19
.2
18
.2
17
16
.2
15
.5
13
.2
12
.4
11
.2
10
.8
9.
2
8.
2
7
--- (4
)
22
.1
--- (3
)
--- (2
)
--- (1
)
Loc
k---
out
sig
nal
lam
pre
d
Pre
ssu
re
gau
ge
Saf
ety
val
ve
Exp
ans
ion
ves
sel
Inj
ect
ors
Flu
eth
erm
ost
at
Saf
ety
the
rm
ost
at
Det
ect
ion
ele
ctro
de
Ign
itio
ne
lec
tro
de
Air
pre
ssu
re
sw
itc
h
Fan
and
ven
tur
id
evi
ce
By-
- -p
ass
val
ve
D.h
.w
.te
mp.
pro
be
Mai
nc
irc
uit
tem
p.p
rob
e
D.h
.w
.fi
lte
r
Mai
nc
irc
uit
flo
ws
witc
h
Gas
val
ve
(m
odu
lat
ing
ope
rat
or)
Gas
val
ve
(on
- --o
ffo
per
ato
rs)
Ful
ls
equ
enc
ed
evi
ce
Fun
ctio
ns
ele
cto
rs
(re
g.p
.c.
b)
Reg
ula
tio
np
.c.
b.
Fus
e(r
egu
lat
ion
p.c
.b.
)
D.h
.w
.fl
ow
sw
itc
h
Div
erte
rv
alv
e
Pum
p
D.h
.w
.h
eat
exc
han
ger
D.h
.w
.c
irc
uit
C.h
.c
irc
uit
Con
den
sat
ed
rai
np
ipe
and
tra
p
Flu
ep
ipe
s
Gas
sup
ply
lin
e
Pow
ers
upp
ly
lin
e
D
ef
ec
t
#
Th
e
bo
ile
rd
oe
s
no
ts
up
pl
y
d.
h.
w
.
(c
ol
d
w
at
er
fro
m
th
e
ta
p)
.
R
eg
ul
ar
op
er
at
io
n
in
c/
h
m
od
e
ev
en
du
rin
g
a
dr
aw
in
g
of
fd
.h
.w
.
J
J
J
O
n
c/
h
m
od
e
th
e
te
m
pe
ra
tu
re
of
th
e
m
ai
n
ci
rc
ui
tr
ea
ch
es
75
°
C
an
d
th
e
c/
h
sy
st
em
do
es
no
th
ea
t.
Th
e
bo
ile
ro
pe
ra
te
s
co
rr
ec
tly
on
d.
h.
w
.m
od
e.
J
J
In
co
rr
ec
tm
od
ul
at
io
n
J
J
J
N
oi
sy
bo
lie
r
J
J
Th
e
bo
ile
ro
pe
ra
te
s
co
rr
ec
tly
bu
t
th
e
ga
s
pr
es
su
re
to
th
e
bu
rn
er
re
-
m
ai
ns
at
m
in
im
um
.
J
J
F
Po
or
d.
h.
w
.t
em
pe
ra
tu
re
J
J
J
J
J
(9
)
OFF
Lo
w
d.
h.
w
.f
lo
w
ra
te
J
J
J
---
W
at
er
le
ak
s
fro
m
th
e
sa
fe
ty
va
lv
e
du
rin
g
op
er
at
io
n
on
c/
h
J
J
J
J
---
W
at
er
le
ak
s
fro
m
th
e
sa
fe
ty
va
lv
e
w
he
n
th
e
bo
ile
ri
s
of
f.
J
J
J
N
ot
e
U
se
fu
li
nf
or
m
at
io
n
ca
n
be
ob
ta
in
ed
al
so
fr
om
th
e
op
tic
al
in
di
ca
tio
n
gi
ve
n
by
th
e
ap
pl
ia
nc
e
op
er
-
at
io
n
lig
ht
s
(s
ee
se
ct
io
n
10
.4
).
1
C
he
ck
fo
r2
30
V~
be
tw
ee
n
lin
e
(L
)a
nd
ne
ut
ra
l(
N
)
Ve
rif
y
th
e
in
te
gr
ity
of
su
pp
ly
ca
bl
e,
pl
ug
an
d
ex
te
rn
al
fu
se
s.
C
he
ck
th
e
po
la
rit
y
of
lin
e
an
d
ne
ut
ra
lc
on
ne
ct
io
n
2
Ve
rif
y
th
e
so
un
dn
es
s
of
th
e
ga
s
su
pp
ly
pi
pe
,t
he
po
si
tio
n
of
st
op
va
lv
es
.
C
he
ck
th
e
ga
s
pr
es
su
re
at
th
e
in
le
tt
es
tp
oi
nt
of
th
e
ga
s
va
lv
e
(s
ee
se
ct
.1
2.
3)
w
ith
th
e
bo
ile
ra
tr
es
ta
nd
du
rin
g
op
er
at
io
n
an
d
co
m
pa
re
it
w
ith
th
e
va
lu
es
gi
ve
n
on
th
e
in
st
al
la
tio
n
bo
ok
le
t.
3
C
he
ck
fo
rs
ou
nd
ne
ss
an
d
ab
se
nc
e
of
ob
st
ru
ct
io
ns
.V
er
ify
th
at
th
e
flu
e
te
rm
in
al
is
co
rr
ec
tly
in
st
al
le
d
(s
ee
cl
ea
ra
nc
es
)a
nd
en
-
su
re
th
at
ex
ha
us
tg
as
is
no
ts
uc
ke
d
ba
ck
by
th
e
bo
ile
r.
4
C
he
ck
fo
rs
ou
nd
ne
ss
of
th
e
ci
rc
ui
ta
nd
ve
rif
y
its
co
rr
ec
tf
ill
in
g
(s
ee
al
so
in
st
al
la
tio
n
m
an
ua
l).
5
A
ja
m
m
ed
by
---
pa
ss
co
ul
d
ca
us
e
th
e
ov
er
---
he
at
in
g
of
th
e
m
ai
n
ci
rc
ui
ta
nd
th
e
in
te
rv
en
tio
n
of
th
e
sa
fe
ty
th
er
m
os
ta
t.
6
C
he
ck
th
e
m
in
im
um
ga
s
pr
es
su
re
at
th
e
ou
tle
tt
es
tp
oi
nt
of
th
e
ga
s
va
lv
e
(s
ee
se
ct
.1
2.
3)
an
d
co
m
pa
re
it
w
ith
th
e
va
lu
e
gi
ve
n
on
th
e
in
st
al
la
tio
n
bo
ok
le
t.
7
Ve
rif
y
th
e
cl
ea
nn
es
s
of
in
je
ct
or
s.
8
C
he
ck
th
e
pr
es
su
riz
at
io
n
of
th
e
ex
pa
ns
io
n
ve
ss
el
.R
ef
er
to
th
e
in
st
al
la
tio
n
m
an
ua
lf
or
pr
op
er
va
lu
es
.
9
d.
h.
w
.p
re
ss
ur
e
to
o
hi
gh
or
flo
w
ra
te
to
o
hi
gh
.I
fn
ec
es
sa
ry
in
-
se
rt
a
flo
w
ra
te
lim
ite
r(
15
.6
).
