L.B. White I-3 Infraconic - Manual (Page 22)

21
No
Problem 5 Heater Does Not Return Back to Low Heat.
Does
main burner shut of
f
when thermostatic
head is
set belo
w r
oom
te
m
perature?
R
emo
v
e
thermostatic head fr
om v
alv
e body:
A
.
If heat
er returns t
o
lo
w fheat when y
ou push do
wn on plunger pin of v
alv
e, replace
thermostatic head and sensor assembly
.
B.
If heat
er still does no
t cy
cle t
o
lo
w heat, the v
alv
e is sticking and should be
replaced.
Heater backflashes gas through air inlet. Problem 4
Is inner
cone seam
fractured or is tip
damaged or
missing?
R
eplace Combustion Cone.
Ye
s
No
Are
inject
or
body
, orif
ices,f
ilt
er
,
v
enturi tube, or inner
cone par
tially plugged
with dir
t?
R
eplace the orif
ice.
Clean all o
ther
com
ponents.
No
Is pr
oper
gas pressure
being supplied t
o
the heat
er?
Check f
or pr
oper
gas pressure.
Pr
oper pressure at
high heat Should
R
ead 5 PSIG.
Ye
s
No
Combustion Cone Kits Par
t
N
umber
5
7
2
129
Ye
s
Are burner
assembly
nuts loose?
Ye
s
Tight
en the nuts
Is the burner
plat
e or burner gask
et
crack
ed?
Ye
s
R
eplace the burner
plat
e.or gask
et
No No
Is inner cone
w
eld seam
aligned t
o
burner plat
e
no
tch?
No
P
osition the inner cone
w
eld seam in burner plat
e
no
tch.