Watts AERCO Benchmark 2.0LN, Operating & Maintenance Instructions

Page: 49 / 101

MAINTENANCE
7- 2
Table 7-1. - Maintenance Schedule
PARAGRAPH ITEM 6 Mos. 12 Mos. 24 Mos.
Labor
Time
7.2
Spark Igniter
(GP-122435-S)
*Inspect Inspect Replace 15 mins.
7.3
Flame Detector
(66006)
*Inspect Inspect Replace 15 mins.
7.4
Combustion
Adj.
*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 Trap
Inspect
Inspect &
Clean
1 hr.
* Only performed after initial 6 month period after initial startup.
7.3 FLAME DETECTOR
The flame detector, part number 66006, 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 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 and flame
detector gasket, if removed.
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.
IGNITER CONTACTOR
FLAME DETECTOR
Figure 7.2
Spark Igniter and Flame Detector Location
Cut-Away View