L.B. White I-17 Infraconic - Manual (Page 24)

24
No
Problem 6 Heater does not return back to low heat.
Does
main burner decrease
in heat
when thermostatic head is
set belo
w r
oom
te
m
perature?
R
emo
v
e
thermostatic head fr
om modulating v
alv
e assembly:
A
.
If heat
er returns t
o
lo
w f
ire when y
ou push do
wn on plunger pin of v
alv
e, R
eplace
thermostatic head/sensor assembly
.
B.
If heat
er still does no
t cy
cle t
o
lo
w f
ire, the modulating v
alv
e is sticking and
should be replaced.
Heater backflashes gas through air housing. Problem 5
Is inner
cone seam
fractured or is tip
damaged or
missing?
R
eplace combustion cone.
Ye
s
No
Are
air housing. v
enturi
tube, burner
orif
ice,f
ilt
er
, or inner
cone par
tially
plugged with
dir
t?
Clean these com
ponents.
No
Is pr
oper
gas pressure
supplied t
o
the heat
er?
Check f
or pr
oper
gas pressure.
Pr
oper pressure at
high heat should
read 5 PSIG.
Ye
s
No
Combustion Cone Kits
Par
t
N
umber
2
1
08
7
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.