O 2 Sensor - Watts AERCO Benchmark BMK750 Operation And Service Manual

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 8 – MAINTENANCE
removing the flame detector.
Be sure to use the current model flame detector, included in the maintenance kit; some older
flame detectors are shaped differently and may not function properly.
This part and instructions are included in both 12 Month Maintenance Kit P/N 58025-01 (BMK750
–3000) and P/N 58025-11 (BMK5000 & 6000) and all BMK750 – 6000 24 Month Maintenance
Kits.
8.5 O SENSOR
2
The Lean Oxygen Sensor (P/N 61026) should be cleaned and inspected every 12 months. It is
not included in any of the 12- or 24-month maintenance kits.
On BMK750 – 3000 units, it is located on the burner plate at the top of the unit. It may be hot, so
allow the unit to cool sufficiently before removing or replacing the it.
O SENSOR
2
Figure 8-3a: O
On the BMK5000 & 6000, it is located on the burner's rear plate, on the rear of the unit.
O SENSOR
2
(P/N 61026)
GAS LINE TO
EXHAUST
MANIFOLD
Figure 8-3b: O
OMM-0145_A99 • GF-218 •
Sensor Mounting Location – BMK750 & 1000
2
REAR OF UNIT
Sensor Mounting Location – BMK5000 & 6000
2
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
9/18/2019
O SENSOR
2
COVER
(Removed from
original position)
AIR EDUCTOR
ASSY.
For AERtrim
(P/N 24508-TAB)
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