Watts AERCO Benchmark 2.0, User Manual

Page: 52 / 97

MAINTENANCE
7-2
bushing over the contactor and reconnect
the igniter cable.
8. 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
Spark Igniter
(GP-122435-S)
*Inspect Replace 15 mins.
7.3
Flame Detector
(123970)
*Inspect Replace 15 mins.
7.4
Combustion
Adj.
*Check Check 1 hr.
7.5
Testing of
Safety Devices
See CSD-1
Chart in
Appendix
20 mins.
7.6 Burner Inspect 2 hrs.
7.7
Condensate
Drain Trap
Inspect
Inspect &
Clean
Inspect &
clean if
necessary
1 hr.
* Only performed after initial 6 month period after initial startup.
7.3 FLAME DETECTOR
The flame detector (part no. 123970) is located
in the body of the burner (see Fig. 7.1). The
flame detector may be HOT. Allow the unit to
cool sufficiently before removing the flame
detector.
To inspect or replace the flame detector:
1. Set the
ON/OFF switch on the control panel,
to the OFF position. Disconnect AC power
from the unit.
2. Remove the side and top panels from the
unit.
3. Disconnect the flame detector lead wire.
Unscrew the flame detector and remove it.
(See Fig 7.2)
4. Inspect the detector thoroughly. If eroded,
the detector should be replaced. Otherwise
clean the detector with a fine emery cloth.
5. Reinstall the flame detector hand tight only.
6. Reconnect the flame detector lead wire.
7. Reinstall the side and top panels on the unit.
7.4 COMBUSTION CALIBRATION
Combustion settings must be checked at the
intervals shown in Table 7-1 as part of the
maintenance requirements. Refer to Chapter 4
for combustion calibration instructions.
SPARK PLUG
IGNITER CONTACTOR
FLAME DETECTOR
IGNITER BUSHING
Figure 7.2
Spark Igniter and Flame Detector Location
Cut-Away View