Avanti BD7000 - Manual (Page 17)

17
FLAT BEER
Foamy head disappears quickly: beer lacks usual zestful brewery fresh flavor.
Causes Corrections
1  Greasy
glass
 Do not wash beer glasses together with glasses that have
contained milk or any other fatty substance. Lipstick is a fatty
substance.. Make sure it is removed from glass.
 Excess amount of germicides build up and leave a fatty film on
glass, which may cause flat beer.
 It is preferable to steam and sterilize glasses where health
laws permit.
 Wash glasses thoroughly with a good detergent.
 Do not use soap.
 Do not dry-wipe glasses. Permit glasses to air-dry by placing
them on wire or corrugated metal.
 Rinse in fresh cold water just before serving beer. It is best to
serve beer in a wet glass.
2  Improper drawing of
beer into glass.
 Open faucet quickly and completely.
 Check and find the correct distance to hold glass from faucet
when drawing. Proper foam should be a tight creamy head,
and the collar on the average glass should be ¾” to 1” high.
 Beer drawn without head has appearance of being flat.
3  Not enough pressure.  Increase pressure if beer runs too slowly. Correct flow is to fill
4  Defective Thomas and
Tongue Vents.
 Pressure
is shut off.
 Check all washers frequently, particularly the air vents. A
clogged vent will obstruct the flow of air or Co2.
 Check source of pressure. Check power source when air
compressor is used. Air compressor should never be
connected to light switch. Make certain to have a separate
electric plug outlet for the compressor.
 Check
CO
2
tank, if empty, replace (See inside cover for proper
procedure).
 When barrel is tapped, and proper pressure applied, pressure
must always remain on until barrel is empty.
 If beer is started without first applying pressure beer will be
wild at the start, and flat towards the end.
5  Pre-color,
or beer
system, too cold.
 With an accurate thermometer, check temperature in pre-
cooler or box.
 Temperature at the faucet should always be colder by at least
two degrees than at the precooler or box.
6
 Sluggish
pressure
regulators.
 A regular seat, or the regulator diaphragm, may require
replacing.
 Also, check the same as you would for Corrections 3 & 4.
7  Contaminated
air
source.
 Oil or grease fumes.
 Filter all air after it leaves compressor.
 Oil fume from compressor, of kitchen grease fumes, pumped
into beer, will cause Flat Beer.
 If possible CO
2
gas should be used as a pressure source.
8  Moisture in Air system.  With the use of an air compressor, it is imperative to have a
moisture trap installed in the Pre-cooler, and drained daily.
This is in addition to an activated charcoal filter, necessary to
purify the air just before it enters the barrel.
 With tank type compressors, drain the tank weekly.
 Moisture traps should be drained daily.
9  Rapid movement of air.  An air fan, or exhaust blower drawing air, or blowing air, across
the bar where beer is drawn, may cause the dead of foam to
fall quickly. Fans or blowers should be located so that air
movement is not directly across from where beer is drawn.