12
6.
T
he
b
ur
ne
r
se
em
s
to
cy
cl
e
on
a
nd
of
f m
or
e
th
an
it
sh
ou
ld
.
7.
T
he
b
ur
ne
r
st
ar
ts
, b
ut
th
e
m
ai
n
fa
n
ne
ve
r c
om
es
on
.
• G
as
m
an
ifo
ld
p
re
ss
ur
e
• D
irt
o
n
m
ai
n
ai
r b
lo
w
er
o
r i
m
pr
op
er
s
et
up
of
o
ut
le
t a
ir
du
ct
• B
ur
ne
r s
en
so
r
• H
ea
te
r C
on
tro
l U
ni
t (
H
C
U
)
• F
an
s
en
so
r
• H
ea
te
r C
on
tro
l U
ni
t (
H
C
U
)
• B
lo
w
er
m
ot
or
re
la
y
• C
ur
re
nt
o
ve
rlo
ad
o
n
bl
ow
er
m
ot
or
• B
lo
w
er
m
ot
or
• U
se
a
lo
w
p
re
ss
ur
e
ga
ug
e
(0
-1
5
in
ch
es
o
f w
at
er
c
ol
um
n)
w
ith
1
/8
” N
PT
in
le
t.
In
st
al
l g
au
ge
in
th
e
pr
es
su
re
ta
p
po
rt
lo
ca
te
d
on
th
e
ou
tp
ut
s
id
e
of
th
e
ga
s
va
lv
e.
R
un
th
e
he
at
er
.
Ad
ju
st
th
e
pr
es
su
re
b
y
tu
rn
in
g
th
e
pr
es
su
re
a
dj
us
tin
g
sc
re
w
(l
oc
at
ed
o
n
th
e
in
pu
t s
id
e
to
p
of
th
e
ga
s
va
lv
e)
u
nt
il
th
e
ga
ug
e
re
ad
s
4”
W
.C
.
R
ef
er
to
p
ip
e
si
zi
ng
c
ha
rts
in
th
e
H
ea
t W
ag
on
En
gi
ne
er
in
g
G
ui
de
.
H
ea
te
r r
eq
ui
re
s
9-
14
” W
.C
. i
nl
et
p
re
ss
ur
e.
• C
he
ck
fo
r d
irt
o
r i
ce
b
ui
ld
up
o
n
th
e
ai
r i
nl
et
o
r b
lo
w
er
w
he
el
.
If
us
in
g
du
ct
o
n
th
e
ai
r o
ut
le
t,
in
su
re
th
e
ba
ck
p
re
ss
ur
e
do
es
n
ot
e
xc
ee
d
a
st
at
ic
p
re
ss
ur
e
of
.5
” W
.C
.
C
he
ck
w
ith
lo
w
p
re
ss
ur
e
ga
ug
e.
• O
n
th
e
he
at
er
c
on
tro
l u
ni
t (
H
C
U
) d
is
co
nn
ec
t t
he
w
ire
s
fro
m
te
rm
in
al
s
X1
0
an
d
X1
1.
U
si
ng
a
n
oh
m
m
et
er
, c
he
ck
th
e
re
si
st
an
ce
b
et
w
ee
n
th
e
tw
o
w
ire
s
fo
r a
re
ad
in
g.
C
om
pa
re
to
S
en
so
r R
es
is
ta
nc
e
C
ha
rt
pa
ge
1
7.
R
ep
la
ce
s
en
so
r i
f r
ea
di
ng
is
o
ut
o
f r
an
ge
.
• I
f a
ll
of
th
e
ab
ov
e
ch
ec
k
go
od
, r
ep
la
ce
th
e
H
C
U
.
• O
n
th
e
he
at
er
c
on
tro
l u
ni
t (
H
C
U
) d
is
co
nn
ec
t t
he
w
ire
s
fro
m
te
rm
in
al
s
X1
2
an
d
X1
3.
U
si
ng
a
n
oh
m
m
et
er
, c
he
ck
th
e
re
si
st
an
ce
b
et
w
ee
n
th
e
tw
o
w
ire
s
fo
r a
re
ad
in
g.
C
om
pa
re
to
S
en
so
r R
es
is
ta
nc
e
C
ha
rt
pa
ge
1
7.
• T
ur
n
th
e
3-
po
si
tio
n
m
ai
n
sw
itc
h
to
th
e
fa
n
po
si
tio
n.
I
f t
he
b
lo
w
er
ru
ns
, c
he
ck
th
e
fa
n
se
ns
or
.
If
it
is
g
oo
d,
re
pl
ac
e
th
e
H
C
U
.
• T
ur
n
th
e
3-
po
si
tio
n
m
ai
n
sw
itc
h
to
th
e
fa
n
po
si
tio
n.
I
f t
he
re
la
y
pu
lls
in
, c
he
ck
fo
r v
ol
ta
ge
b
et
w
ee
n
th
e
L1
a
nd
L
2
te
rm
in
al
s.
T
he
n
ch
ec
k
th
e
vo
lta
ge
b
et
w
ee
n
te
rm
in
al
s
T1
a
nd
T
2.
T
he
v
ol
ta
ge
s
ho
ul
d
be
th
e
sa
m
e.
I
f i
t i
s
m
uc
h
lo
w
er
,
re
pl
ac
e
th
e
re
la
y.
• T
ur
n
th
e
3-
po
si
tio
n
m
ai
n
sw
itc
h
to
th
e
fa
n
po
si
tio
n.
C
he
ck
fo
r v
ol
ta
ge
b
et
w
ee
n
th
e
2
so
le
no
id
c
oi
l t
er
m
in
al
s
on
th
e
m
ot
or
re
la
y.
I
f t
he
re
is
n
o
vo
lta
ge
, t
he
o
ve
r
lo
ad
is
b
ad
.
R
ep
la
ce
th
e
m
ot
or
a
nd
b
lo
w
er
a
ss
em
bl
y.
• T
ur
n
th
e
3-
po
si
tio
n
m
ai
n
sw
itc
h
to
th
e
fa
n
po
si
tio
n.
C
he
ck
fo
r v
ol
ta
ge
b
et
w
ee
n
te
rm
in
al
s
T1
a
nd
T
2
on
th
e
m
ot
or
re
la
y.
I
f t
he
v
ol
ta
ge
is
g
oo
d,
re
pl
ac
e
th
e
m
ot
or
.
V
G
4
0
0
T
R
O
U
B
L
E
S
H
O
O
T
IN
G
S
y
m
p
to
m
P
o
ss
ib
le
C
a
u
se
s
P
o
ss
ib
le
S
o
lu
ti
o
n
s