Midco DS45B User Manual
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 Z21.8alatest edition and National Fuel Gas Code, ANSI
Z223.1-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 gas utilization equipment to satisfactorily
meet the application needs must be made by a MIDCO
distributor (or other qualified agency) using factory
specified and 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/CGA 1-B149.1 or 2. When the
conversion burner is used on 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 gas utilization equipment. Inform the userof the hazards of storing flammable liquids and vapors in the vicinity of this
gas utilization equipment and remove such hazards.
Affix this manual adjacent to the conversion burner.
CODE COMPLIANCE IS THE SOLE RESPONSIBILITY
OF THE INSTALLER.
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.
Installation and service must be performed by a qualified installer, service
agency or the gas supplier.
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 call your gas
supplier from a neighbor's
phone. Follow the gas suppliers'
instructions.
• If you cannot reach your gas
supplier, call the fire department.
USER: Retain this manual for future reference. If other than routine service or maintenance as
described in this manual is required, contact a qualified service agency. DO NOT ATTEMPT REPAIRS.
An inadvertent service error could result in a dangerous condition.
SAFETY INFORMATION TERMS: The following terms are used to identify hazards, safety precautions or special nota-
tions 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 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.
Installation and Service Instructions
Midco International Inc.
4140 West Victoria Street Chicago, Illinois 60646
tel 773.604.8700 fax 773.604.4070
web www.midco-intl.com e-mail sales@midco-intl.com
1207
8470 72
Printed in USA
Economite DS45B
Gas Conversion Burner
Quality Designed for Proven Performance
The Economite Model DS45B direct spark ignition conversion burner is adaptable to most gas utilization equipment, including
gravity and forced circulation furnaces and boilers, and is particularly recommended for horizontal and downdraft gas utilization
equipment since it needs no draft to maintain a pilot. Power burner design makes it perfectly suited for oil burner replacement.
Part 1 Installation
Specifications
Part 1
Installation
Derate burner for altitudes over 2,000 feet by 4% for each 1,000 feet of additional elevation.
IMPORTANT: The ECONOMITE DS45B is 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 gas
utilization equipment 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 gas utilization equipment
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 gas utilization equipment 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, provision must be made for an outside air supply near the gas utilization equipment
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.
______________________________________________________
Clean the gas utilization equipment, combustion chamber, heat exchanger interior and
flue connections. Remove all adhering tars, scale, dirt and soot. Inspect for actual leaks
and/or potential leaks.
Cement all joints, including those in the gas utilization equipment base and around 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.
______________________________________________________
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 an existing oil burner combustion chamber liner can be used, if in good
condition.
2
SPECIFICATIONS NATURAL or PROPANE Gas
AIR DELIVERY (Approximate Air Delivery at Zero Draft Draft)........ 85 SCFM*
MAXIMUM FIRING RATE**..............................................................400 MBH***
MINIMUM FIRING RATE**...............................................................200 MBH***
TUBE DIAMETER................................................................................4 inches
TUBE LENGTH....................................................................................9 inches
MINIMUM COMBUSTION CHAMBER SIZE
400 MBH................................................10" W X 161/2" L or 15" dia.
300 MBH.......................................................9" W x 14" L or 13" dia.
200 MBH.......................................................7" W x 11" L or 10" dia.
GAS PRESSURE REQUIRED
NATURAL................................................................5.0" to 14.0" W.C.
PROPANE.............................................................11.0" to 14.0" W.C.
STANDARD VOLTAGE......................................120 Volts..................60 Cycle
FLAME SAFETY..........Direct Spark Ignition of Main Flame, Electronic Safety
MAIN AUTOMATIC VALVE...........................................3 Function Redundant
* SCFM = Standard Cubic Feet/Minute
** Ratings Based on 1000 BTU/cu. ft. NATURAL, 2500 BTU/cu. ft. PROPANE at
Sea Level
*** 1 MBH = 1,000 BTU/Hr.One gallon fuel oil =140MBH.
II Preparation of the Gas
Utilization Equipment
I Ventilation
III Combustion Chamber
Part 1 Installation
Part 1
Installation
Continued
IV Chimney, Vent
Connector*, and
Draft Control
*Formerly referred
to as Flue Pipe
3
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 flame contact on the heat exchanger walls or
flueways.
If a built up chamber liner is required, use 2300
o
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 liner opening with refractory material as shown
by Figures 1 and 2. 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.
NOTE: In no case should the burner tube be allowed to extend into the chamber proper; it
must be set flush to 1" short of the inside surface, because high combustion chamber
temperatures will cause premature electrode deterioration.
Special heat resistant alloy extension tubes and instructions are available for those
applications where the burner tube is too short to reach the combustion chamber (such as
old-fashioned gravity warm air furnace installations).
WARNING: Burner cabinet 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. Non-standard arrangements may be available for
some models; consult factory for details if required.
Before permanently setting the burner in place, check that the venturi casting openings
are free of foreign materials and the electrodes have not been damaged or displaced. See
Figure 6.
______________________________________________________
The chimney shall be inspected
for unsafe conditions such as
deteriorated masonry and
excessive soot or other blockage
or potential blockage.
The Vent Connector shall be
connected to a chimney already
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.
III Combustion Chamber
Continued
Figure 1: Dry Base Boiler with Combustion
Chamber Liner (Warm Air Furnace
Construction is Similar)
Figure 2: Wet Base Boiler with Unlined
Combustion Chamber
Figure 3: Draft Hood Positions
V Electrical
The length of horizontal uninsulated Vent Connector between 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.
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. 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.
Gas utilization equipment requiring controlled draft may
be equipped with a listed double acting barometric draft
regulator, installed and adjusted in accordance with the
manufacturer’s instructions, if approved by local codes.
A device which will automatically shut off 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.
______________________________________________________
Installation wiring and grounding of 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. Be sure to hook up to
permanently live circuit. Provide a fused on-off disconnect switch carrying a minimum 3
amp fuse.
4
Part 1 Installation
Part 1
Installation
Continued
IV Chimney, Vent
Connector*, and
Draft Control
Continued
250 MBH
320 MBH
400 MBH
7”
8”
9”
Maximum
Input
Flue Pipe
Diameter
Table 1: Recommended
Vent Connector Sizes
Figure 4: Wiring Diagram
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