Product Overview

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MPO-IQ
Installation & Service Manual
BECKETT NX OIL BURNER PART NOS. FOR MPO-IQ SERIES BOILERS
DIRECT VENT APPLICATIONS
NOTE: When ordering parts always give the serial and model numbers shown on the boiler and burner. Also
provide the name of the part(s) and part number as listed below.
Item
No.
Part Description
MPO-IQ147B MPO-IQ189B MPO-IQ231B
Beckett Part Numbers
Complete Oil Burner (without Primary
Control)
BCB9403 BCB9404 BCB9405
1 Air Adjustment Mechanism Assembly 51794U
2 Air Guide 101101U
3 Heat Shield (where used/optional) Specify
4
Air Tube Combination NX70LB NX90LD
Air Tube Mounting Screws #8 x 3/8" 4396
5 Blower Wheel 29994U
6 Connector Tube Assembly, 11" 51127
7 Coupling 2454
8 Rear Access Door 32119U
9 Electrodes Insulator Kit 51811U
10
Fuel Unit, Single Stage, A2EA6520N621L 2184404U
Fuel Unit, Two Stage 51975U
Mounting Screws 1/4 -20 x 7/8" 4189
11a Gasket, Igniter Baseplate
51942U
11b Gasket, Igniter Baseplate Hinge
11c Gasket, Wiring
11d Gasket, Rear Access Door
15 Igniter, Electronic 51771U
16 Inlet Air Box 1010U
18 Inlet Air Adapter, Outside Air Kit 1014U
19 Nozzle Line Electrode and Head Assembly Specify
20
Motor 21805U
Mounting Screws 1/4 -20 x 7/8" 4189
21 Oil Primary (Safety Control) Specify
22 Retention Head Assembly - 6 Slot 51785U
23 Retention Head Assembly - 9 Slot 51815U
24 Splined Nut 3666
25 Spring, Igniter Prop 32058PU
26 Wiring Box 5770
27 Low Firing Rate Baffle (If applicable) 32229U
28 Cover, Burner 51812U
29 Mounting Plate, Burner Cover 32103U
30 Thumbscrews, Cover Mounting 21899U
Not
Shown
Gasket, Flange 32087
Main Housing Assembly 51783
Nozzle Line Heater (If applicable) 51621
13 Service Parts (continued)