Midco 400-33 Parts List

Replacement Parts

List

Economite Model 400-33

This burner has been manufactured since 1961 and has been relatively unchanged except
for various pilot styles described on page 4. Pilot styles can be determined by the double
digit suffix following "Model 400" on the rating plate.

. Serial number discontinued April 1969 with 94,000.
. Date coding started April 1969 with 1769 (17th week, 1969).

• Pressure tap moved from "B" cock assembly to pilot solenoid February 26, 1986 (date
code 986).

• Motors featuring permanently lubricated bearings used for the first time January, 1987
(date code 487).

• Honeywell R4795A Flame Safeguards superseded by Honeywell RM7895 Flame
Safeguards November, 1993. R4795AFlame Safeguard is not available.

Manuals:
400-33 Installation and Service Manual 8449-84 for 400-33.

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

notice. Please consult factory for item availability.

• Construction required Dual Main Valves (UL 795 Requirement) April 1, 1994 (date code

1394)

• Maxitrol phased out their RV10 and RV60 Regulators February and March 1992 and
replaced them with Models RV12 and RV61. Refer to notes 5 and 6 page 2.

802

8472 01

Printed in USA

Midco®International Inc.

4140 West Victoria Street
Chicago, Illinois 60646
tel [phone]
fax [phone]
web www.midcointernational.com
[e-mail]

Quality Designed for Proven Performance

For manufacturing dates and manual availability,
refer to historical data below and on page 2.

Supersedes EC88, EC131

400-33

Economite 400-33 Exploded View

2

NOTES

1. See MAMMOTH INDUSTRIES, page 3.

2. Some applications, usually O.E.M., require the use of more than one extension. Determine the exact number in your ECONOMITE
before ordering.

3. Motors featuring permanently lubricated ball bearings were used for the first time in production January 1987 (date code 487).

4. 5" and 15" Blower Housing and Blast Tube Assemblies are NOT available. A 5" assembly can be fabricated by hack sawing 4" off of a 9"
assembly. A15" assembly can be made by assembling a 9" assembly with 2020500 (8" long Accessory Blast Tube Extension).

5. Maxitrol and General Controls Pilot Regulators have been used interchangeably. For exact replacement, determine the model used in
your ECONOMITE before ordering. If regulating PROPANE, select 8400-00 (Maxitrol RV-12), as the RV-12 responds better to
PROPANE regulation.

6. 3/4" NPT and 1" NPT Main Regulators have been used interchangeably. Determine the size used in your ECONOMITE before ordering.

7. 3/4" NPT and 1" NPT Main Automatic Valves have been used interchangeably. Determine the size used in your ECONOMITE before
ordering. Several brands have been used, depending on price and availability. MIDCO will provide whatever is currently in stock. If you
desire exact replacement, obtain locally. NOTE: MIDCO stocks only complete valve assemblies. Obtain operator heads or bodies locally.

8. When replacing Fluid Power Valves, obtain exact valve number and brand from valve rating plate, as well as the bill of material number
from the ECONOMITE rating plate. Contact MIDCO for price and availability.

9. Contact MIDCO for availability of early EC manuals.

10. 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.

11. Honeywell R4795A Flame Safeguards were phased out of production November, 1993. Replaced by Honeywell RM7895 Flame
Safeguards. Determine which version is required before ordering.

• REFER TO LISTING

LAYOUT MAYNOT 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.

8402-00