Ye
s
Ye
s
Pr
ob
le
m
33
H
ea
te
r
Li
gh
ts
BB
ut
D
oe
s N
N
ot
S
ta
y L
Li
t.
Is Pr
oper Gas
Pressure Supplied
to
the Heat
er?
Is the
Thermocouple
Contact N
ut tight at
the Gas Contr
ol
Valv
e?
Pr
ovide Pr
oper
Gas Pressure. (See Dataplat
e.)
Check f
or Dir
t Betw
een
Contact Butt
on of
Thermocouple and
Electr
omagnet of V
alv
e.
Blo
w Out if Necessar
y.
Snug the Contact N
ut in
Place with Appr
opriat
e
W
rench.
Ye
s
No
Ye
s
Ye
s
Ye
s
Ye
s
Is
Thermocouple Tip Pr
operly P
ositioned?
Tip Should be Exposed 1/2 in.
fr
om Burner
Plat
e.
A.
Im
pr
oper Ignit
er Gap.
(Gap t
o 1/8 in.)
B.
Def
ectiv
e Ignit
er wire.
(Check f
or Continuity
.)
C.
Def
ectiv
e Ignit
er
.
D.
Def
ectiv
e Ignition
Contr
ol.
K
eep Butt
on
Depressed t
o
Allo
w Pr
oper
W
arm Up.
Does Ignit
er
Continually
Spark?
Is Contr
ol
Valv
e Butt
on F
ully
Depressed?
Fully Depress the Contr
ol Butt
on.
No
No
No
No
No
Are
Backflash Switch Contacts “Closed”. (P
er
form Continuity
Check
.)
Det
ermine Cause of
Backflash Switch Opening. (See
Pr
oblem 5.)
No
Ha
ve
Individual
Wires Been Check
ed fr
om
thermocouple Energy Cut-Of
f
to
R
ela
y and Backflash
Switch?
Check Individual
Wires f
or Continuity
.
No
Has
Thermocouple Milliv
olt
Strength Been Check
ed
with Multimet
er?
Set Multimet
er t
o D.C.
Volts. Apply Pr
obes t
o
Terminals on Energy
Cut Of
f Block of
Thermocouple.
R
eadings of 1
0
D.C.
Milliv
olts and A
bo
ve
are A
cceptable.
R
eplace Thermocouple for R
eadings under 1
0
M.V
.
Ye
s
No
Has Dr
op Out
of Pilo
t Contr
ol Magnet
Been Check
ed with
Multimet
er?
Follo
w Same
Pr
ocedure f
or
Checking
Thermocouple. Close Gas Supply V
alv
e t
o
Heat
er
. When Contr
ol
Valv
e Magnet
R
eleases, R
eading
Should be 1
0
Milliv
olt
D.C. or Lo
w
er
. If
Contr
ol V
alv
e Magnet
R
eleases A
bo
ve 1
0
Milliv
olt D.C., R
eplace
Contr
ol V
alv
e.
Ye
s
No
Is R
ela
y
R
eceiving Pr
oper
Voltage?
(See Dataplat
e.)
Check Wiring t
o
R
ela
y f
or Continuity
.
R
epair or R
eplace.
R
ela
y Contacts Do No
t
Close. R
eplace R
ela
y.
Ye
s
Ye
s
Did Y
ou Allo
w
Suf
ficient Time f
or the
Thermocouple t
o W
arm Up
(30-60 Seconds) Bef
ore R
eleasing
Butt
on?
No
19
Summary of Contents for Tradesman CP100
Page 2: ......
