L.B. White I-17 Infraconic - Manual (Page 23)

23
Problem 4 Outer combustion cone does not heat up on high thermostat setting.
Is pr
oper
gas pressure being
supplied t
o
the
heat
er?
Check f
or pr
oper gas
pressure t
o
the heat
er
.
Pr
oper pressure at high
heat should read 5 PSIG.
Ye
s
No
Is secondar
y
orif
ice plugged?
R
emo
v
e
orif
ice and
clean it.
Ye
s
No
A
.
R
emo
v
e
thermostatic head fr
om
thermostatic v
alv
e body
. If out
er
cone lights, replace thermostatic head and sensor assembly
.
-- OR --
B
R
eplace thermostatic head
v
alv
e body
.
Are there
block
ages in
gas hose, piping,
air housing or v
enturi
tube?
R
emo
v
e
the com
ponent
and clean it.
Ye
s
No