AERCO BMK 3.0 LN Nat. Gas Jan 2011 - Manual (Page 54)

MAINTENANCE
5. Next, lo osen an d r emove the i gnitor-injector
from the burner housing using a 1" open-end
wrench.
6. Check the ign itor-injector f or evide nce of
erosion or c arbon b uild-up. If ther e is
evidence of s ubstantial erosion or c arbon
build-up, the ignitor-injector s hould b e
replaced. If carbon build-up is present, clean
the c omponent us ing f ine em ery c loth.
Repeated c arbon bui ld-up is an indic ation
that the c ombustion s ettings of the unit
should be c hecked. Ref er to Ch apter 4 f or
combustion calibration procedures.
7. Prior to reinstalling the ignitor-injector, a high
temperature, c onductive, ant i-seize c om-
pound must be applied to the threads.
NOTE
If a r eplacement ignitor -injector ( part no.
58023) is bei ng i nstalled, a c ompression
nut c ontaining a b uilt-in f errule wil l be
included with t he r eplacement par t. If
needed, 3 i ndexing washers ar e als o
included. These washers may be needed
to pr operly position the gas inj ector tube
of the ignitor-injector within the 120° angle
shown in Figure 7-2.
120
120
DEG. GAS INJECTOR TUBE
MUST BE WITHIN
THIS RANGE
IGNITOR-
INJECTOR
BURNER
HOUSING
HOUSING
CENTERLINE
Fgurei 7-2
Burner Assembly – Top View
8. Reinstall the ignitor-injector in th e bur ner
housing and t orque t o 80 to 90 i n-lbs.
However, if the burner housing was replaced
just pr ior to r eplacing t he ig nitor-injector,
torque to 1 80 in-lbs, then lo osen a nd r e-
tighten to 80 to 90 in-lbs.
9. Connect the s taged ig nition as sembly to t he
gas inj ector t ube of the ignitor-injector b y
securing the compression nut to t he elbow of
the staged ignition assembly.
10. Reconnect the ignitor-injector cable.
11. Reinstall the side and top panels on the unit.
Table 7-1 - Maintenance Schedule
PARAGRAPH ITEM 6 Mos. 12 Mos. 24 Mos.
Labor
Time
7.2
Ignitor-Injector
(58023)
*Inspect Inspect Replace 15 mins.
7.3
Flame Detector
(66006)
*Inspect Inspect Replace 15 mins.
7.4
Combustion
Calibration
*Check Check 1 hr.
7.5
Testing of
Safety Devices
See CSD-1
Chart in
Appendix I
20 mins.
7.6 Burner Inspect 2 hrs.
7.7
Condensate
Drain Traps
*Inspect
Inspect &
Clean
1 hr.
* Only performed after initial 6 month period after initial startup.
7-2