Install Instructions
CG
i
GAS-FIRED
wATER
BOILER-
sERIEs
a-
Boiler
Manual
llc
Troubleshooting - control module lights (cont.)
CHART
3 - PURGE & POWER
hgh
ts flashing
-
Usually
i
ndicates
pre
ssure
switch
stuck
c
losed
or
failed
to
make
within
5
minutes
-
I&
WARNINGI
Electrical shock hazard - Wherever you see & TURN OFF
POWER&
, foll
ow
the instru
ct
i
ons
. Failure to follow
instructions could r
es
ult
in
severe personal inju
ry,
death,
()(subs
tant
ia
l property damage.
.
Reset
bo
iler control
by
tu
rn
ing
off
power
at
service switch
or
turning down thermostat for 2 to 20 seconds .
.
Thermostat should call
fo
r h
ea
t and approp
ri
ate zone valves open .
Does
inducer
motor
operate?
No
I I
Yes
+
.
Wa
it
45
seconds .
Does
in
ducer
motor
operate?
No
Yes
+
.
Remove INDUCER plug (
Figure
38
,
Item
6, page
53
)
Wa
it 5 minutes .
.
from plug receptacle
of
con
tr
ol module.
Is PURGE light nashing?
.
Place
vo
lt
me
ter leads across the 120
VAC
N
an
d
120
VAC
H
pi
ns
of
the INDUCER receptacle (middle and
No
bottom pins).
I I
Yes
Does the voltmeter
in
dic
ate
120
VAC
?
No
Yes
~
.
Try reseating plug in
module receptacle and
.
Boiler s
hou
ld be in
restart.
.
If
indu
ce
r still
does
not
normal operating
wo
rt<
, replace inducer
sequence.
Are
vent
or
combustion
air
assembly.
.
Observe operation until
passages blocked?
.
Retes
t.
thermost
at
is sa
ti
sfied
and inducer has
completed its
pos
t-
purge
.
Remove one
of
t
he
wires connected to the press
ur
e
cycl
e.
swttc
h.
.
Check continui
ty
across t
he
swtt
ch
terminals .
No
I I
Yes
Does
the
ohmmeter
in
dic
ate
the
switch
is
closed?
No
I
Yes
~ ~
Replace control
.
Check
ai
r pressure swtt
ch
.
per manual
Sec
t
io
n 11 b.
.
Clear passages
an
d
mod
ul
e.
Replace
if
necessary .
recycle
bo
iler.
Retes
t.
.
.
.
Retes
t.
.
Recheck
bo
iler operation.
56
Part Number 550-142-780/0712