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23
Pr
ob
le
m
44
O
ut
er
C
om
bu
st
io
n
C
on
e D
D
oe
s
N
ot
HH
ea
t
Is Pr
oper
Gas Pressure Being
Supplied t
o the
Heat
er?
Check f
or Pr
oper Gas Pressure
to
the Heat
er with a Gas
Gauge. Pr
oper Pressure at
High Fire - 5 PSIG.
Pilo
t Pressure - 20 in. W
.C.
Ye
s
No
Is Main Burner Orif
ice Plugged?
R
emo
ve
Orif
ice and Blo
w
Out With Com
pressed Air
.
R
eplace the Orif
ice if
Block
age Canno
t be
R
emo
ved.
Ye
s
No
If Out
er Combustion Cone still does no
t Light,
R
eplace Pressure Switch.
Are There
Block
ages in
Gas Hose, Piping,
Tubing Assembly
, Inject
or
Body or V
enturi
Tube?
R
emo
ve
the Com
ponent
and Clear the Block
age
Using Com
pressed Air
.
R
eplace the Com
ponent
if Necessar
y.
Ye
s
No
Содержание I17
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