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Oval-U 100
Radiant Tube Heaters
Owner’s Manual • Oval-U 100
Radiant Tube Heaters
25
On
e T
ime
Di
ffe
re
nt
ial
a
ir pre
ss
ure
sw
itc
h c
on
ta
ct
s a
re
clo
se
d b
ef
or
e f
an m
ot
or
sta
rts.
Tw
o T
im
es
Di
ffe
re
nt
ial
a
ir pre
ss
ure
sw
itc
h c
on
ta
ct
s h
av
e
no
t c
lose
d.
Ind
ica
te
s no
air p
ro
vin
g i
n f
an s
ec
tio
n
of
hea
ter
R
ed L
ED F
la
sh
in
g
Is p
re
ss
ur
e s
wi
tc
h
stu
ck
cl
ose
d?
(C
he
ck c
on
tin
uit
y)
Is p
re
ss
ur
e s
wi
tc
h
stu
ck o
pe
n? C
he
ck
co
nt
inu
ity
.
Is p
ro
pe
r v
olt
ag
e s
up
-
pli
ed
to
fan
m
oto
r?
De
fe
ct
ive m
ot
or
.
Re
pl
ac
e m
ot
or
.
De
fe
ct
ive
ignit
io
n m
od
ule
.
Rep
lac
e m
od
ule
.
De
fe
ct
ive w
iri
ng o
r c
on
ne
ct
io
ns
to m
ot
or
. R
ep
air o
r r
ep
lac
e
wir
ing
a
nd
co
nn
ec
tio
ns
.
Is b
ur
ne
r b
ox g
as
ke
tin
g
to
rn
, o
r m
iss
ing
?
Is i
gn
itio
n m
od
ule
re
-
ce
ivi
ng
p
ro
per
vo
ltag
e?
Is f
an l
oo
se o
n m
ot
or
sha
ft?
Is p
ro
pe
r v
olt
ag
e s
up
-
pli
ed t
o h
ea
te
r?
Pro
vid
e p
ro
pe
r v
olt
ag
e.
Chec
k e
lec
tric
al s
upp
ly,
circ
uit
b
rea
ke
rs
, e
tc.
En
su
re
clea
r pre
ss
ure
sw
itc
h tu
be
s
ar
e n
ot p
lug
ge
d o
r k
ink
ed
. C
he
ck
dif
fe
re
nt
ial a
ir p
re
ss
ur
e o
rifi
ce
s a
nd
air i
nle
t p
lat
e o
rifi
ce
. I
f p
lug
ge
d,
clea
n w
ith
a
ir pre
ss
ure
. P
re
ss
ure
sw
itc
h o
ut o
f c
ali
br
at
io
n, r
ep
lac
e
pre
ss
ure
sw
itc
h.
Rep
lac
e bu
rner
b
ox
g
as
ke
ting
.
En
su
re p
ro
pe
r s
ea
lin
g o
f a
ll b
ur
ne
r
bo
x c
om
pa
rtme
nt
s.
Ti
gh
te
n f
an b
lad
e s
et s
cr
ew
Re
pl
ac
e a
ir p
re
ss
ur
e s
wi
tc
h
De
fe
ct
ive
ignit
io
n c
on
tro
l
No
No
No
No
No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
R
api
d F
la
sh
He
at
er i
s i
n a 6
0 s
ec
on
ds s
of
t lo
ck
-o
ut
. H
ar
d l
oc
k w
ill o
cc
ur a
fte
r t
hir
d t
ria
l, w
ith e
ith
er 1 o
r 2 fl
as
h c
od
e. T
he a
ir p
re
ss
ur
e s
wi
tch c
on
ta
ct
s a
re c
los
ed p
rio
r t
o a c
all f
or h
ea
t o
r d
oe
s
no
t c
los
e o
n a c
all f
or h
ea
t a
fte
r t
he m
ot
or s
ta
rts
. R
ef
er t
o S
er
vic
e I
ns
tru
ct
ion
s f
or A
ir P
re
ss
ur
e S
wi
tch i
n t
his m
an
ua
l.