Maintenance - Schwank infrasave 4BN6-CB Installation & Owner's Manual

10. MAINTENANCE

1. Prior to each use, inspect the heater for damage - a qualified gas service person must repair
or replace any damaged or malfunctioning components as supplied by the manufacturer.
2. Periodically (monthly) perform a leak test of all visible gas connections to ensure safe opera-
tion - see page 11 for leak test procedures
3. Annually inspect the gas hose that is concealed inside the confines of the post. Refer to the
assembly instructions (pages 9 -10) in reverse order to expose the hose for inspection. If there
is evidence of excessive abrasion or wear, replace the gas hose or any worn or defective com-
ponents only with replacement parts available from the manufacturer.
4. Reassemble the heater and leak test all connections as instructed on page 11.
5. Keep the appliance area clear and free form combustible materials, gasoline and other flam-
mable vapors and liquids
6. Ensure that there is no obstruction to the flow of combustion and ventilation air
7. Visually inspect the burner flame performance.
 The burner area is likely to attract spiders, especially inside the orifice. Annually before
the heater is put into service, the heater should be inspected by a qualified gas service
technician for spider webs, insects, and debris around burner and orifice. A plugged in-
jector or orifice will obstruct the gas flow to the burner. This will result in burner malfunc-
tion and possible damage.
Good Burner Performance:
Uniform color and heat output
 A heater that is operating properly will produce a relatively uniform 'orange glow' over
the surface of the emitting mantel. (Caution: Wind conditions can cool portions of the
emitter surface below the temperature of the visual spectrum.)
 A poorly performing burner will exhibit uneven 'orange glow' at the bottom of the mantle,
and the top portion of the mantle will be dark (below the visual spectrum temperature)
 Other indicators of poor burner performance are:
 A gas 'smell' combined with yellow tipped flames on burner
 Heater does not provide expected heat output capacity
 Burner makes small popping sounds while operating. Note: When heater is warming
up or cooling down a pinging metallic noise is normal.
 A heater in this poor performance condition requires service by a qualified gas service
Uniform
'orange'
colored
mantle
Poor Burner Performance:
Irregular color, dark top,
and heat output at bottom
14
Dark zone at top
Possible uneven
yellow-tipped
flame, small
'popping' sound
(Continued on page 15)
4BN/L6,4SN/L5 Manual
IM100310
RD: DEC 2013
RL: 1B