Install Instructions
CG i
GAS
-FI
RED
wATER
eo1LER-
sERIEs
a-
Boiler
Manual
llc
Troubleshooting - control module lights
CHART
1 - Troubleshooting POWER light status
-
Usually
indicates
reversed 120
VAC
polarity
if
POWER
ligh
t
flas
hes
by
itself
-
I
AWARNING
I Electrical shock
ha
za
rd
- Wherever you see .t. TURN OFF POWER& ,
fo
llow t
he
instructi
ons
. Failu
re
to follow
· ·
instr
uc
tions could result in severe personal injury, death or s
ub
stantial property damage.
Is POWER light
off?
• Make sure servi
ce
swtt
ch
or
c
ir
cutt breaker is on
or
No
Yes
fu
ses are good.
• Remove 120 VAC IN plug (
Figure
38,
Item
3, page 53)
on control module.
•
Us
ing
voHme
t
er
, check across
bl
ack and white wi
re
pins
Is POWER light ...
of 120 VAC IN plug.
Fl
ashing Flashing wtth On steady
Does voltmeter indicate 120 VA
C?
alone
another light (not fl
as
hin
g)
1-
No
Yes
TSTAT CI
RC
Chart
Pr
ob
l
em
is with i
nc
oming
light flashing
2
elect
ri
city. Have licensed
PURGE
Chart
Chart
elect
ri
cian repair circu
tt
.
light
flashing
3 5
FLAME
Chart
Chart
• Reconnect 120 VAC IN plug.
light flashing 4
6
• Remove transformer plug (
Figure
38, Item 2, page 53)
Fo
r i
ns
ufficient heat
or
no
heat
pr
ob
lem, go to
on control module.
Chart
7 if POWER light is
on
steady, wtth
no
other
1+-
•
Us
ing
voHme
t
er
, check across left si
de
t
op
and bottom
light fl
as
hing.
pins
of
transformer receptacle.
Does voltmeter indicate 120 VA
C?
No
Yes
~
•
Us
ua
lly indicates
po
lari
ty
on
incoming 120
VAC
power
Rep
la
ce control module.
line is wrong.
Retest.
•
.t.
TUR
N OFF POWER
.t.
at
service switch
or
breaker,
then reverse t
he
HOT and NEUTRAL w
ir
es entering the
bo
il
er
in the J-box.
• Re
in
stall 120
VAC
transformer plug.
• Restore POWER
at
service swtt
ch
or
breaker.
• Remove TS
TA
T transformer
pl
ug (
Figure
38
, Item 5,
Is
POWER
light flashing
now?
page 53)
on
control modul
e.
No
Yes
•
Us
ing
voHme
t
er
, check pins of
pl
ug.
Does voltmeter indicate
24
VAC
?
No
Yes
Have system checked
by
a
+
licensed electricia
n.
If
Replace transformer.
problem persists,
ca
ll your
Retest and check for back
Boiler should n
ow
I
local
Weii-Mclain
sales
feed
of
vo
ltage from
Replace
co
ntrol modul
e.
operate normally.
representative.
system wiring.
Retest.
54
Part Number 550-142-780/0712