Filter
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At least once a year, check the air filter: Replace it
(recommended) or clean it. Remove the boiler front
cover to access the filter box. Turn latches 1/4 turn on
filter box cover to remove filter.
Slant/Fin replacement air filter, part number 66-0515,
must be used. The filter can be cleaned with soap and
water. Shake off excess moisture and after drying,
spray with an adhesive-type air filter spray. Make sure
filter box cover is secured tightly after replacing.
In the case of severe outside dust/dirt conditions which
cause above-average accumulation on the filter, it may
be necessary to change it (or clean it) more often. This
procedure may be done by user or service technician,
providing a record is kept of each replacement or
cleaning date to assure an established diligent routine.
ANNU
AL TECHNICIAN INSPECTIONS
Before each heating season, call your qualified
service technician to perform the following
inspections (and repair any problems encountered).
Check vent system: For corrosion, obstructions, leaks
or sagging. Will require disassembling and resealing of
vent tubing.
Check water system:
For water piping leaks, properly
filled boiler and proper system air elimination.
Check gas piping: For gas valve and piping leaks.
Check boiler controls: For correct settings and
functioning. To include safety controls and calibration.
Check air filter: Replace (recommended) or clean.
System heat exchanger and burner: For sooting,
corrosion or improper operation.
Combustion blower: It’s a sealed component which
does not require lubrication.
Circulator: Some models require lubrication. S.A.E. #20
oil recommended .
The Concept 21 control board, located behind the boiler
front cover, has a set of LED indicator lights which provide
important information at a glance about boiler operation:
Power Indicator (GREEN):
Steady ON means there is
electrical power to the boiler. Light will come on when
power is provided to boiler.
Diagnostic Indicator (RED):
Steady ON or intermittent
flashing indicates a system operation problem.
Flame Indicator (AMBER): Steady ON means the boiler is
running and proper flame detection is sensed.
WHAT THE INDICATOR
LIGHTS TELLS YOU
Before calling a qualified service technician, check the
following first:
• Room thermostat is calling for heat?
• Fuse or circuit breaker is OK?
• Boiler service switch is ON?
• Gas supply is available to gas meter?
• Manual main gas shutoff is open?
• Boiler gas valve knob is in ON position?
Then, observe indicator lights: You can help provide
useful information to the service technician so the
technician can arrive with appropriate replacement parts.
Carefully note the red diagnostic indicator light. (It can be
viewed by looking through the vents in the front cover.)
When a system failure occurs, and there’s power to the
boiler, the indicator light will show a series of quick
flashes. There will be a short interval between the series
when the indicator stops flashing.
Count the number of flashes that occur after the short
no-flashing interval. Using the chart above, determine
correct failure code for number of flashes you counted.
Call a qualilfied service technician and report your boiler
model plus the number of flashes you counted and the
code for the flashes.
Note: The boiler will attempt restart each hour and after a
power interruption. If boiler restarts, diagnostic light will
turn OFF. If boiler does not restart, diagnostic light will
return to either steady-on or the series of flashes.
IN CASE YOUR
BOILER SHUTS DOWN
BOILER FAILURE CODES
Indicator Fault Indicated
Steady on Control internal failure
1 Flash High limit open
2 Flashes No ignition
3 Flashes Pressure switch problem
4 Flashes Ignitor failure
5 Flashes Flame signal loss
6 Flashes Improper flame signal
CONCEPT 21
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