SECTION 13: T
ROUBLESHOOTING
45 of 55
Press
u
re s
w
itch does not
Check fl
u
e/air s
u
pply d
u
ct for o
b
str
u
ctions; remo
v
e any o
b
str
u
ctions.
operate.
Check for loose/leaky air hoses to the press
u
re s
w
itch; repair/
replace/tighten hoses as req
u
ired. Check for 24V across the secondary
terminals 4 and 5 (red and yello
w
w
ires) of the transformer.
IF NO: Check for 120V across the primary terminals 1 and 3 (
b
lack and
w
hite
w
ires) of the transformer. If 120V is present, replace
transformer. If 120V is not present, check
w
iring
b
et
w
een po
w
er
cord,
b
lo
w
er motor and transformer.
IF YES:Connect a j
u
mper
w
ire across press
u
re s
w
itch terminals; if j
u
mper
w
ire allo
w
s
b
lo
w
er to operate, replace press
u
re s
w
itch.
for part n
u
m
b
er that applies to yo
u
r
u
nit rating. Do not res
u
me normal heater operation
u
ntil
replacement press
u
re s
w
itch has
b
een installed.
Igniter spark gap incorrect.
Reset spark gap to 1/8" (3.175 mm).
BURNER DOES NOT LIGHT
Possible Cause
Try this....
Air in the
g
as line.
Pur
g
e
g
as lines.
Improper gas inlet press
u
re.
Check gas inlet press
u
re at the s
u
pply line. Gas inlet press
u
re sho
u
ld
b
e
as follo
w
s:
Natural Gas:
5.0"
w
c (12.4 m
b
ar) minim
u
m;
14.0"
w
c (34.8 m
b
ar) maxim
u
m
LP Gas:
11.0"
w
c (27.4 m
b
ar) minim
u
m;
14.0"
w
c (34.8 m
b
ar) maxim
u
m
If gas inlet press
u
re does not meet inlet press
u
re req
u
irements, contact
the gas company.
Gas
v
al
v
e does not open.
Check for 24 V across
v
al
v
e terminals.
IF NO: Check
w
iring
b
et
w
een the ignition mod
u
le and the
v
al
v
e. Repair/
replace
w
ires as req
u
ired. If
w
iring is OK, replace ignition mod
u
le.
IF YES: Replace gas
v
al
v
e.
Lo
w
gas o
u
tlet press
u
re.
Check gas manifold press
u
re. Meas
u
re manifold press
u
re at the press
u
re
tap on the gas
v
al
v
Natural Gas:
3.5"
w
c (8.7 m
b
ar)
LP Gas:
10.5"
w
c (26.1 m
b
ar)
If manifold press
u
re does not meet req
u
irements, adj
u
st
v
al
v
e o
u
tlet
press
u
re
w
ith the adj
u
stment scre
w
on the
v
al
v
e.
NOTE:
Proper inlet gas press
u
re m
u
st
b
e
v
erified
b
efore performing o
u
tlet
press
u
re testing.
La
b
els
Prod
u
ct safety signs or la
b
els sho
u
ld
b
e replaced
b
y the prod
u
ct
u
ser
w
hen they are no longer legi
b
le. Please contact Rapid Engineering LLC or
yo
u
r RAPID
™
independent distri
bu
tor to o
b
tain replacement signs or la
b
els.
.
Summary of Contents for CGTH-30
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Page 52: ...CGTH INSTALLATION OPERATION AND SERVICE MANUAL 46 of 55 FIGURE 38 Manometer Reading ...
Page 60: ...CGTH INSTALLATION OPERATION AND SERVICE MANUAL 54 of 55 ...
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