Midco RE4400DS Service Manual

Installation and Service Instructions

RE4400DS & RE4400DSA

Ne touchez à aucun interrupteur. Ne pas vous servir des

Appelez immédiatement votre fournisseur de gaz depuis

Economite

Gas Burner

In the United States, Installation must conform
with local codes or, in the absence of local codes, with
Installation of the National Fuel Gas Code, ANSI Z223.1-
latest edition,from the American National Standard Institute.
Further reference should be made to the recommendation of
your fuel supplier.

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/CGA 1B-149. Further reference should be

made to the recommendation of your fuel supplier.

WARNING: Additions, changes, conversions, and
service must be performed by an authorized MIDCO
representative, service agency, or the fuel supplier. Use
only MIDCO specified and approved parts.
INSTALLER: Inform and demonstrate to the user the
correct operation and maintenance of the gas utilization
equipment. Inform the user of the hazards of storing
flammable liquids and vapors in the vicinity of this gas
utilization equipment and remove such hazards. Affix
this manual and associated literature adjacent to the
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 and associated literature is required, contact a
qualified service agency. DO NOT ATTEMPT REPAIRS.
An inadvertent service error could result in a dangerous
condition.

FOR SERVICE CONTACT:

Name
Address

WARNING: If the information in these instructions
is not followed exactly, a fire or explosion may result,
causing property damage, personal injury or death.

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.

?

AVERTISSEMENT. Assurez-vous de bien suivre
les instructions données dans cette notice pour
réduire au minimum le risque d’incendie ou
d’explosion pouvant entraîner des dommages
matériels, des blessures ou la mort.

Ne pas entreposer ni utiliser d’essence ni d’autres
vapeurs ou liquides inflammables à proximité de cet
appareil ou de tout autre appareil.

QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:

• Ne pas tenter d’allumer d’appareil.

•
téléphones se trouvant dans le bâtimentoù vous êtes.

•
un voisin. Suivez les instructions du fournisseur.

• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service des incendies.

L’installation et l’entretien doivent être assurés par un
installateur ou un service d’entretien qualifié ou par le
fournisseur de gaz.

Burner Model

Bill of Material #
Phone
Date of Installation

notations and have standard meanings throughout this manual. They are printed in all capital letters using a bold type face
as shown below, and preceded by the exclamation mark symbol. When you see the safety alert symbol and one of the
safety information terms as shown below, be aware of the hazard potential.

The following terms are used to identify hazards, safety precaution of special

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

Midco®International Inc.

4140 West Victoria St. - Chicago, Illinois 60646
tel [phone] fax [phone]

web www.midco-intl.com e-mail [e-mail]

Quality Designed for Proven Performance

Serial Number

Wiring Diagram

602

8471 25

Printed in U.S.A.

Part 1 Installation

Specifications

The ECONOMITE Model RE 4400DS and RE4400DSA burners with direct spark ignition

1

are adaptable to most gas utilization equipment, including furnaces and boilers. Power
burner design makes them perfectly suited for oil burner replacement, including rooftop and
industrial applications.

AIR DELIVERY (Approximate Air Delivery at Zero Draft)
FIRING RATE (NATURAL OR PROPANE )

GAS SUPPLY PRESSURE REQUIRED

TUBE DIAMETER........................................................ 4"

TUBE LENGTH............................................................ 9"

RECOMMENDED COMBUSTION CHAMBER SIZE (AT MAX. BTU/HR)

ELECTRICAL SUPPLY......................................120 VAC...........60 Hertz

ELECTRONIC CONTROL VOLTAGE ................ 24 VAC

FLAME SAFETY....Direct Spark Ignition of Main Flame, Electronic Safety

RE4400DS and RE4400DSA ..... 125 SCFM

3

RE4400DS & RE4400DSA
MAXIMUM MBH
MINIMUM MBH

NATURAL .............................................. 7.0" to 14.0" W.C.

PROPANE ............................................. 5.0" TO 14.0" W.C.

WIDTH 10"
LENGTH 16.5"

4

4

400
132

RE4400DS & RE4400DSA

2

5

Part 1

Installation

I Ventilation

1. Standard burners are shipped as NATURAL gas models. Contact your Midco®dealer for

TABLE 1: Burner Specifications

PROPANE gas burners.

2. SCFM = Standard Cubic Feet / Minute.

3. All Ratings Based on 1000 BTU/Cu. Ft. NATURAL and 2500 BTU/cu.ft PROPANE. Derate
burner for altitude over 2,000 feet by 4% for each 1,000 feet above sea level.

4. 1 MBH = 1,000 BTU/hr.

5. For 50 Hertz applications the RE4400DS and RE4400DSA will be derated by 20%. Contact the
factory for details. NOTE: Burners rated for 50Hertz are not UL Listed.

____________________________

CAUTION: The ECONOMITE Model RE4400DS and RE4400DSA Burners are
not intended for outdoor installation and must be protected from excessive moisture.
Provide adequate clearance for service and proper operation.

If the former automatic oil burner gave trouble-free operation, it is probable that the heating
plant area has sufficient infiltration of air for combustion and dilution of flue gases.

Nevertheless, the area must be checked.

? Open basement or utility areas of normal construction, without storm windows or tight
doors, will generally allow sufficient air infiltration. However, if the heating plant is located in
a tight or separate room, ventilation to an open area as described above will be required.
Install two permanently open grills, each sized on the basis of one square inch free area per
1,000 BTU (but not less than 100 square inches) 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 within 12 inches of the floor.
?? If the heating plant is located in an area of unusually tight construction, or if an exhaust
fan, kitchen ventilation system, clothes dryer and/or fireplace is installed in the building,
provisions must be made for an outside air supply near the heating appliance area. Install
permanently open grills sized at not less than one square inch free area per 4,000 BTU of
burner input. When ventilating through horizontal ducts, grills should be sized at not less
than one square inch free area per 2,000 BTU of burner input. In any case, the minimum
dimension of rectangular air ducts shall not be less than 3 inches.
? In Canada, for detailed ventilation requirements, refer to standard CAN 1-B149.1 or .2
and/or local codes.

____________________________

II Preparation of

the Gas Utilization

Equipment

2

? Clean the gas utilization equipment combustion chamber, heat exchanger interior, and flue
connections. Remove all adhering tars, scale, dirt and soot. Inspect for actual or potential
leaks.
? Cement all joints, including those in the heating appliance base and around the door
frames, to prevent leakage into, or out of the combustion chamber.
? The access or firing door should open easily to relieve pressure. If positive latches exist,
they should be modified to permit easy opening; a spring loaded door holder is
recommended.
? On all boilers, make certain the pressure relief safety valve is in good operating condition.

3

Part 1

Part 1 Installation

Installation Continued

III Combustion

Chamber

____________________________

A combustion chamber liner is normally required to protect non-heat transfer surfaces and to
provide a radiant bed for rapid heat transfer to the primary surfaces of the heat exchanger.
In most cases the existing chamber liner can be used, if in good condition.
? In the case of wet base boilers, where the entire firing chamber is comprised of heat
exchange surfaces and no chamber liner was provided for oil firing, a liner is usually not
required for the ECONOMITE. However, a liner or target wall may be necessary if the firing
chamber is unusually short, in order to avoid excess flame contact on the heat exchanger
walls or flueways.

? If a built up chamber liner is required, use 2,300°F minimum insulating material.
? The burner tube, or the stainless steel sleeve that is included with the burner, must be

sealed air tight into the combustion chamber opening with refractory material. The sleeve is
preferred as it is designed to properly locate the end of the tube relative to the inside wall of
the combustion chamber, and to permit burner removal without breaking the seal.

CAUTION: In no case should the burner tube be allowed to extend into the
chamber proper; it must be set at least 1" short of the inside surface because high
combustion chamber temperatures will cause premature pilot, electrode, burner tube
and sleeve deterioration.

IV Chimney, Vent

Connector and

Draft Control

Figure 1: Dry Base Boiler with Combustion

Chamber Liner (Warm Air Furnace

Construction is Similar)

WARNING: BURNER MUST BE MOUNTED IN ORIENTATION SHOWN IN
FIGURES 1 AND 2. ANY OTHER MOUNTINGS MAY CAUSE A DANGEROUS
CONDITION, AND WILL VOID BURNER WARRANTY AND AGENCY APPROVALS. NON­STANDARD ARRANGEMENTS MAY BE AVAILABLE FOR SOME MODELS. CONSULT
FACTORY FOR DETAILS IF REQUIRED.

? Before permanently setting the burner in place, check that the main burner ports are free
of foreign materials, and also that the spark electrode assembly has not been damaged or
displaced. See Figures 7A and 7B.

Figure 2: Wet Base Boiler with Unlined

Combustion Chamber

____________________________

deteriorated masonry and excessive soot or other blockage or potential blockage.
Installation must conform with local codes or in the absence of local codes with NFPA,
ANSI Z223.1 latest edition.

venting solid fuel burning equipment, an incinerator or an open fireplace.

? The Vent Connector shall be made of non-combustible, corrosion resistant material
capable of withstanding the vent gas temperature produced by the gas utilization equipment
and of sufficient thickness to withstand physical damage.
? The Vent Connector shall be as short as possible. The entire length shall be readily
accessible for inspection, cleaning, and replacement.
? The length of horizontal uninsulated Vent Connector between the chimney and a single
gas utilization equipment shall not exceed 75% of the height of the chimney above the
connector, or 100% if the Vent Connector is insulated.
? The Vent Connector shall be installed so as to avoid turns or other construction features
which create excessive resistance to flow of vent gas. It shall be installed without any dips or
sags and shall slope upward at least 1/4" per foot.
? A manually operated damper shall not be placed in the Vent Connector or chimney of
any gas utilization equipment.
? The Vent Connector shall be firmly attached to draft hood outlets and flue collars. Joints
between sections of connector piping shall be fastened by sheet-metal screws or other
approved means. The Vent Connector shall be supported for the design and weight of the
material employed to maintain clearance and prevent physical damage and separation of
joints.

WARNING: The chimney shall be inspected for unsafe conditions such as

WARNING: The vent connector shall not be connected to a chimney already

Part 1

Part 1 Installation

Installation Continued

IV Chimney, Vent

Connector and

Draft Control

Continued

? A draft hood or a barometric draft regulator shall be installed in the same room or
enclosure as the equipment in such a manner as to prevent any difference in the pressure
between the hood or regulator and the combustion air supply (see Figures 3 and 4). In no
case shall the relief opening of the draft hood or barometric draft regulator be located at a
point lower than the top of the highest flue passage in the equipment.

Figure 3: Recommended Locations for Draft Hoods

Note: Figure 3 and 4 :

Copyright by American Gas

Association.

Used by permission of the

copyright holder.

Figure 4: Location for Barometric

Draft Regulators

? Gas utilization equipment requiring controlled draft may be equipped with a listed double
acting barometric draft regulator, if approved by local codes (see Figure 4).
? If a device which will automatically shut off the gas to the burner in the event of sustained
backdraft is required. It shall be of the listed manual reset type and installed and adjusted by
a qualified service technician in accordance with the manufacturer’s instructions.
? Refer to gas utilization equipment manufacturer for recommended vent connection
requirements.

____________________________

V Electrical

4

burner housing cover.

CAUTION:Refer to wiring diagram in Figure 5 or located on the inside of the

Installation wiring and grounding to the burner must conform to local codes, or, in their
absence in the United States to National Electric Code, ANSI/NFPA No. 70 latest edition;
in Canada, to Canadian Electrical Code Part 1, CSA Standard C22.1
? Use copper wire not less than 14 gage for line voltage wiring. Hook up to a dedicated line
with an on-off disconnect switch and a minimum 10 Amp breaker.
? The frame of the burner should be well grounded. Normally the piping and/or electric