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Do not store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.
• Do not touch any electrical switch;

do not use any phone in your building.

• Immediately phone your gas supplier 

from another building. Follow the gas 
supplier's instructions.

• If you cannot reach your gas supplier, 

call the fire department.

Installation and service must be 
performed by a qualified installer, 
service agency or the gas supplier.

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The following terms are used to identify hazards, safety precautions or special notations and

have standard meanings throughout this manual. When you see the safety alert symbol and one of the safety information terms, as
shown below, be aware of the hazard potential.

DANGER: Identifies the most serious hazards which will result in severe personal injury or death.
WARNING: Signifies hazards that could result in personal injury or death.
CAUTION: Identifies unsafe practices which would result in minor personal injury or product and property damage.

INSTALLATION AND

SERVICE INSTRUCTIONS

ECONOMITE MODEL F400B-33

Gas Conversion Burner

The  ECONOMITE F400B-33 conversion burner with intermittent spark ignited pilot is adaptable to most gas utilization equipment,
including gravity and forced circulation furnaces and boilers. It is particularly recommended for firing horizontal or downdraft equipment
since it needs no draft to maintain a pilot. Power burner design makes it perfectly suited for oil burner replacement, including rooftop
and industrial applications.
In the United States,  installation  must  conform  with local codes

or, in the absence of local codes, with Installation of Domestic
Gas  Conversion  Burners,  ANSI Z21.8b-1993
, and  National
Fuel Gas Code, ANSI Z223.1-1992
, or latest edition(s) available
from  American  National  Standard  Institute.  Further reference
should be made to the recommendation of your fuel supplier.

NOTE:  Any  additions,  changes, or conversions required in order

for  the  appliance  to  satisfactorily  meet  the application needs
must be made by a MIDCO distributor (or other qualified agency)
using factory specified approved parts.

In Canada,  installation  must  conform  with  local codes or, in the

absence   of   local   codes,  with  Installation  Codes  for  Gas
Burning    Appliances    and    Equipment,    CGA   Standard
CAN/CGA1-B149.1 
or 2.  When  the  conversion burner is used
on  a  Forced   air  Central  Furnace,  the  two  yellow and black
warning  labels  in  the  literature  envelope  shall be attached in
accordance  with  Installation Code, CGa Standard CAN/CGA
1-B149, Clause 5.4.4.4.  
Further  reference  should be made to
the recommendation of your fuel supplier.

INSTALLER: Inform and demonstrate to the user

the  correct  operation and maintenance of this
appliance.  Inform  the  user  of  the hazards of
storing   flammable  liquids  and  vapors  in  the
vicinity   of   this   appliance  and  remove  such
hazards.   Affix  this   manual  adjacent  to  the
conversion burner.
CODE COMPLIANCE IS THE SOLE 
RESPONSIBILITY OF THE INSTALLER.

USER: Retain this manual for future reference. If

other  than  routine  service or maintenance as
described  in this manual is required,  contact

qualified  service  agency.   DO  NOT

ATTEMPT 

REPAIRS.  An  inadvertent  service

error  could result in a dangerous condition.

WARNING: If the information in these

instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.

MIDCO 

International Inc.

4140 WEST VICTORIA STREET, CHICAGO, ILLINOIS 60646 / (773) 604-8700 FAX: (773) 604-4070

PRINTED IN U.S.A.

1296

8470-73

Summary of Contents for ECONOMITE F400B-33

Page 1: ...s or in the absence of local codes with Installation of Domestic Gas Conversion Burners ANSI Z21 8b 1993 and National Fuel Gas Code ANSI Z223 1 1992 or latest edition s available from American Nationa...

Page 2: ...is of one square inch free area per 1 000 BTU of the total input rating of all gas utilization equipment in the combined space One grille should be located within 12 inches of the ceiling the other wi...

Page 3: ...at transfer to the primary surfaces of the heat exchanger In most cases the existing combustion chamber liner formerly used for oil burner can be used if in good condition In the case of wet base boil...

Page 4: ...ing close to burner as shown in Figure 5 Use pipe joint compound approved for use with Liquid Petroleum Gases Piping must comply with local codes To obtain the maximum firing rate of 700 MBH the NATUR...

Page 5: ...bination Valve to OFF close Pilot Manual Shut Off Valve turn burner power on and set operating control to ON or thermostat to call for heat Let the blower run long enough to accomplish four air change...

Page 6: ...r Switch are turned OFF before removing any parts for service WARNING All cover plates enclosed and guards must be in place at all times except during maintenance and servicing IX PILOT The pilot is o...

Page 7: ...e switch plunger to push it past its operating point When running the actuator pulls the disk clear of the plunger To make a specific test of the interlock circuit 1 Turn burner power OFF 2 Turn Manua...

Page 8: ...justable for outlet pressure range of 2 0 W C to 5 0 W C Outlet pressure settings must be checked while the gas is flowing To adjust outlet pressure remove the seal cap for access to the adjusting scr...

Page 9: ...D AND THE BURNER IS LOCATED IN A BASEMENT CRAWL SPACE OR CONFINING SPACE CONTACT YOUR GAS SUPPLIER ABOUT INSTALLING A GAS LEAK WARNING DEVICE PROPANE GAS IS HEAVIER THAN AIR AND CAN SETTLE IN LOW AREA...

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