COZY VC202A-H and Посібник з монтажу та експлуатації - Сторінка 11
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TROUBLE
SHOOTING
CHART
for qualified serviceman
- MAIN BURNER
SYMPTOM
Flame too large
Noisy Flame
POSSIBLE
CAUSES
1. Defective operator section of gas valve.
2. Burner orifice too large.
3. Pressure regulator malfunction.
Noisy pilot.
2. Burr in orifice
(if it whistles
or resonates).
2.
3. Excessive
gas input.
3.
Yellow
tip flames (Some
1. Clogged
main burner
ports.
1.
yellow
tipping
on LP Gas
2. Clogged
draft hood.
2.
is permissible)
3. Linted up air shutter.
3.
Floating
Flame
i. Blocked
venting.
Gas Odor
1. Chinmey
or flue obstruction.
2. Drafts
around
heater.
3. Gas leak.
Delayed
Ignition
i. Pilot flame too small.
Failure to ignite
Condensation
of
water vapor.
Burner
won't
turn off
2. Burner
ports clogged
near pilot.
3. Low gas pressure.
4. Pilot decreases
in size when main
burners
come
on.
5. Drafts
around
unit.
6. Pilot lighter door open causing
disturbance
of pilot flame.
7. Improper
venting.
8. Pressure
regulator
malflmction.
1. Main gas off.
2. Defective gas valve.
1. Improper venting.
l.
2.
Defective
or sticking
automatic
valve.
Excessive
gas pressure
(The supply gas
pressure
must not exceed
1/2 psi or 14"
water column).
CORRECTIVE
ACTION
1. Replace
complete
valve.
2. See orifice chart to determine
the correct
orifice
size
for your Model Number
and elevation.
3. Regulator
must be adjusted
by a qualified
serviceman
usin_ proper
tools and instruments.
1. Reduce
pilot gas with adjusting
screw on combination
gas. (Fig. 1).
Remove
burr or replace
orifice
(Do not enlarge
orifice).
See "Flame
Too Large",
above.
Clean main burner
ports (Do not enlarge
ports).
Clean draft hood.
Check for dust or lint at air mixer opening
and around
the shutter.
i. Clean flue passageways
to relieve blockage.
1. Clean flue.
2. Eliminate
drafts.
3. Shut offgas
service immediately.
Check piping.
Call
gas company.
See "For Your Safety"
(Page
1), and
"Gas Supply"
(Page 3).
1. Check pilot orifice,
clean, increase
pilot gas flow if
necessary
by adjusting
at colnbination
control
valve
(Fig. 1).
2. Clean burner
ports (do not enlarge
ports).
3. Check
gas supply
pressure.
See "Gas Supply".
4. Supply piping
is inadequately
sized.
Consult
local gas
utility or competent
installer.
5. Eliminate
drafts.
6. Close pilot lighter
door.
7. See "Venting"
(Page 2).
8. Regulator
must be adjusted
by a qualified
serviceman
usin_ proper
tools and instruments.
1. Open all manual
gas valves.
2. Replace
gas valve.
1. See "Venting".
i. Clean or replace valve.
2. To con'ect
this situation
contact
the gas company
supplying
the gas.
See "Gas Supply".
TROUBLE
SHOOTING
CHART
- POOR
HEATING
RESULTS
Incorrect
gas input
I. Gas input not checked.
2. Clogged orifice.
3. Pressure
regulator.
4. Thermostat
capillary
tube damaged.
i. Re-check
gas input.
See "Gas Supply".
2. Check orifices for clogging.
If clogged,
clean out the
hole carefully
with a smooth
wood toothpick.
(Do not
in any way enlarge
or distort it).
3. Regulator
must be adjusted
by a qualified
serviceman
using proper
tools and instruments.
4. Replace
gas valve.
Page 11