Oval 80
v.2
and Sentinel
v.2
Radiant Tube Heaters
Owner’s Manual • Oval 80
v.2
and Sentinel
v.2
27
O
n
e T
im
e
D
iff
eren
tial
air
pres
sure
sw
itc
h c
on
ta
ct
s a
re
cl
os
ed b
ef
or
e f
an m
ot
or
st
ar
ts
.
T
w
o T
im
e
s
D
iff
eren
tial
air
pres
sure
sw
itc
h c
on
ta
ct
s h
ave
no
t c
lo
se
d.
In
di
ca
te
s n
o
ai
r p
rov
in
g i
n f
an s
ec
tio
n
of
h
eater
R
e
d L
E
D Fl
a
s
h
in
g
Is
p
re
ss
ur
e s
w
itc
h
st
uck
c
losed
?
(C
he
ck
c
on
tin
ui
ty
)
Is
p
re
ss
ur
e s
w
itc
h
st
uc
k o
pe
n? C
he
ck
co
nt
in
ui
ty
.
Is
p
ro
pe
r v
ol
ta
ge s
up
-
pl
ie
d t
o f
an m
ot
or
?
D
ef
ec
tiv
e m
ot
or
.
Rep
lac
e m
oto
r.
D
ef
ec
tiv
e i
gn
iti
on
m
od
ul
e.
R
ep
la
ce m
od
ul
e.
D
ef
ec
tiv
e w
iri
ng
o
r c
on
ne
ct
io
ns
to
m
ot
or
. R
ep
ai
r o
r r
ep
la
ce
w
iri
ng
a
nd c
on
ne
ct
io
ns
.
Is
b
ur
ne
r b
ox g
as
ke
tin
g
to
rn
, o
r m
is
si
ng
?
Is
ig
ni
tio
n m
od
ul
e r
e-
ce
iv
in
g p
ro
pe
r v
ol
ta
ge
?
Is
fa
n l
oo
se
o
n m
ot
or
shaf
t?
Is
p
ro
pe
r v
ol
ta
ge s
up
-
pl
ie
d t
o h
ea
te
r?
Pr
ov
id
e p
ro
pe
r v
ol
ta
ge
.
Chec
k elec
tric
al
supply
,
ci
rc
ui
t b
re
ake
rs
, e
tc
.
En
su
re
c
le
ar p
re
ss
ur
e s
w
itc
h t
ub
es
ar
e n
ot p
lu
gg
ed o
r k
in
ke
d. C
he
ck
di
ffe
re
nt
ia
l a
ir p
re
ss
ur
e o
ri
fi
c
es
an
d
ai
r i
nl
et p
la
te o
ri
fi
c
e. I
f p
lu
gg
ed
,
cl
ea
n w
ith
a
ir p
re
ss
ur
e. P
re
ss
ur
e
sw
itc
h o
ut o
f c
al
ib
ra
tio
n,
re
pl
ac
e
pressure
swit
ch
.
R
ep
la
ce b
ur
ne
r b
ox g
as
ke
tin
g.
En
sure
proper
sealing
of
all
bur
ner
bo
x c
om
pa
rtm
en
ts
.
Ti
gh
te
n f
an b
la
de s
et s
cr
ew
R
ep
la
ce a
ir p
re
ss
ur
e s
w
itc
h
D
ef
ec
tiv
e i
gn
iti
on
c
on
tro
l
No
No
No
No
No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
R
a
p
id Fl
a
s
h
H
ea
te
r i
s i
n a 6
0 s
ec
on
ds s
of
t l
oc
k-
ou
t. H
ar
d l
oc
k w
ill
o
cc
ur a
fte
r t
hi
rd t
ria
l, w
ith
e
ith
er
1 o
r 2
fl
a
sh c
od
e. T
he a
ir p
re
ss
ur
e s
w
itc
h c
on
ta
ct
s a
re c
lo
se
d p
rio
r t
o a c
al
l f
or h
ea
t o
r d
oe
s
no
t c
lo
se
o
n a c
al
l f
or h
ea
t a
fte
r t
he m
ot
or s
ta
rts
. R
ef
er t
o S
er
vi
ce I
ns
tru
ct
io
ns
fo
r A
ir P
re
ss
ur
e S
w
itc
h i
n t
hi
s m
an
ua
l.
