Viking VGR30 Service Manual page 33

TROUBLE SHOOTING GUIDE
PROBLEM
12. Intermittent spark or ghost
spark (Ghost spark occurs
when the ignition system is
in the off position at approx-
imately every 20 minutes).
13. Continued reignition on top
burner.
14. Yellow tipping - produces
soot and blocks flueways.
15. Lifting flames- flames rise
from the ports to burn some
distance above the port, also
known as a noisy flame.
16. Fluctuating flame
17. Floating flame-lazy looking,
no well defined inner cone,
appears to be "reaching" for
air. Normally a strong
aldehyde odor is present.
(Aldehyde-A class of com-
pounds which have a pungent,
distinct odor.)
PROBABLE CAUSE
12A. Lack of or improper ground.
13A. Defective spark switch or
incorrect switch.
13B. Position of spark electrode
13C. Lack of or improper ground.
13D. Defective spark module.
14A. Lack of primary air due to
incorrect air shutter adjustment
14B. Blocked, dirty primary air open- 14B. Clean and readjust burner
ings or blocked burner ports.
14C. An orifice hood out of line will 14C. Align with burner venturi and lube
reduce primary air injection.
14D. Faulty drilling or a dirty orifice. 14D. Clean orifice or replace faulty
15A. Lifting burner flames results
when the flow velocity of air-
gas mixture from a port exceeds
the flame velocity. (Flame
Velocity -the speed at which a
flame moves through a fuel/air
Mixture.)
16A. Normally caused by non
Uniform gas pressure.
17A. Lack of secondary air.
combustion products
recirculated in the burner box
contaminate the air supply.
17B. The appliance may be over-
rated. If so the flue outlet area
may be too small for the gas
rate.
33
CORRECTION
12A.Check ground at outlet. Check
module ground.
13A. Replace switch.
13B. Align spark electrode with burner
port.
13C. Check ground outlet. Check ground
at the module.
13D. Replace spark module.
14A. Open air shutter to get rid of the
yellow tips. CAUTION-too much
primary air will cause lifting, noisy
flames. Balance must be obtained.
drilled orifice.
15A. Reduce primary air.
16A. Check gas pressure
a) supply
b) regulator
16B. Check orifice for blockage.
a) metal shavings
b) dirt or dust
c) excess grease from burner valve.
17A. Open secondary air inlets.
17B. a) Decrease gas flow rate
b) check and clear any blockage
found in the fluway.
c) check for blockage of burners
And clean if necessary.
d) Adjust primary air to get rid of
any yellow tipping which may
have produced soot to block the