Midco F400B-33 Parts List

REPLACEMENT PARTS LIST

For manufacturing dates and manual
availability, refer to historical data below and
on page 3.

Manual:

F400B-33 Installation and Service Manual (8470-73)

First production April 1994 (date code 1594).

ECONOMITE MODEL

F400B-33

IMPORTANT: Availability of parts as well as specifications are subject to change without notice.

Please consult factory for item availability.

AVOID ERROR IN PARTS SELECTION. When ordering use complete MIDCO Part Number and
Description. Furnish burner model number, bill of material number and date code from
specification plate.

Midco International IncMidco International Inc.

4140 WEST VICTORIA STREET, CHICAGO, ILLINOIS 60646 [phone] FAX: [phone]

www.midco-intl.com e-mail sales@midco-intl .com

PRINTED IN U.S.A.

498

8472-60

LAYOUT MAY NOT BE AS SHOWN

AVOID ERROR IN PARTS SELECTION . When ordering use complete MIDCO Part Number and Description. Furnish
burner model number, bill of material number and date code (if available) from rating plate.

-2-

PART NO.

3981-00

DESCRIPTION

PART NO.

DESCRIPTION

4904-45
4905-15

4" Diameter Stainless Sleeve
Quadrant—Air Shutter Adjustment
Air Shutter—Internal

5253-10
5269-05

PVC Tubing—7¼16"I.D. x 2" long
Blower Interlock Switch (MICRO Switch) with

Bracket
4917-00
4918-11
4919-60
4919-90
4921-50
4922-90
4924-10
4944-02

4944-07

4944-10
4948-50
4959-05
5201-00
5201-10
5202-08

5211-51

5212-20*
5214-20*

5225-26
5234-40
5234-50
5237-00

5249-01
5249-32
5250-00

Main Orifice Holder
Orifice Elbow (1"NPT)
Blower Wheel with Centrifugal Actuator and Disc
Centrifugal Actuator Disc
1¼6 HP Motor
Primary Air Shutter Kit
Inlet Side Plate
Main Spud 25¼64" drill (.390) minimum

capacity—
NATURAL—drill 7¼16" (.437) for 400/540 MBH
range and omit for 540/700 range
Main Spud #9 drill (.196) minimum capacity—
PROPANE—drill for desired capacity per manual
Main Spud Extension
Motor Spacer (4 required)
External Pilot Air Tube Kit
1¼2" sq. Pass Thru for 1¼4" Tube Fitting (gas line)
1¼2" sq. Pass Thru for 5¼16" Tube Fitting (air line)
Pilot Spud #55 (.052) Drill [was #54 (.055)]—
NATURAL and PROPANE
Motor, Wheel and Side Plate Assembly 120¼1¼60
Cartridge Assembly
Cartridge Assembly (O.E.M. Thermo-cycler)
Blower Housing and Burner Tube Assembly
Flamerod Gland Nut
Flamerod Assembly
Pilot Assembly with Insulators, Rods, Temflex

and Baffle
Pilot Air Baffle
Spark Rod Assembly
Pilot Tip with Cone less Insulators, Rods,

Temflex and Baffle

5272-00
5939-01
6784-00

8400-00

8401-00
8402-37
8404-23

8406-69*

8419-50

8423-16

8429-26

8470-73*

8450-21
8451-06
8484-72

8484-75

8502-15

8509-05*
2020100*
2020400*
2020500*
2030302*

Blower Inlet Grille
Flamerod Wire—5" through 9" Burner Tube
Transformer Assembly 120/1/60 24V-40VA
1¼8" NPT Pilot Regulator—1 PSI maximum

inlet (Maxitrol RV12)
1¼8" NPT Pilot "B" Cock
1¼8" NPT Pilot Solenoid 24/1/60
1" Ball Valve with side tap
Motor Relay Single Pole 24V-14AMP (O.E.M.

only)

1

1" Redundant Combination/Pilot Valve
(Robert Shaw)

Blower Interlock Switch (MICRO BZ-2RQ174-A2)

1

Electronic Control (M-H S8680J1004)
Installation and Service manual
Orifice Holder Sealing Gasket
Spark Rod Insulator sleeve
Heyco Strain Relief (SR-4K-1)—Flame Rod

Wire
Heyco Strain Relief (SR-11-2)—Spark Rod

Wire
Wire Assembly
Spark Cable (O.E.M. Thermo-cycler)
4" Mounting Flange
4" long Accessory Blast Tube Extension
8" long Accessory Blast Tube Extension
Kit to convert NATURAL burner to PROPANE;

includes minimum spud to be drilled per
manual, Pilot Regulator Spring, Propane
Regulator Head and Instructions.

* NOT SHOWN

1. WARNING:Explosion hazard. Can cause serious injury or death. This device can malfunction if it gets wet. Never try to use a
device that has been wet—replace it.

NOTES

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