Midco EC200 Series Operating instructions

The ECONOMITE Model EC Series gas burner is adaptable to any type gas utilization equipment,
including gravity and forced air circulation furnaces and boilers, and is particularly recommended for
horizontal and downdraft gas utilization equipment since it is a direct spark type burner.
Power burner design makes it perfectly suited for oil burner replacement.
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 Z21.8a- latest 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 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 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 gas 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 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 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,Service Instructions and Parts Manual
Midco®International Inc
4140 West Victoria Street Chicago, Illinois 60646
tel [phone] fax [phone] web www.midcointernational.com
704
8471 38
Printed in U.S.A.
Economite Legacy Series
EC200 and EC300
Conversion Burners

is located in a tight or separate room, additional ventilation
may 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 located in the
confined space. One grille should be located within 12"
inches of the ceiling, the other within 12" 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, provisions 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
not less than one square inch free area per 2,000 BTU. 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/CGA 1-B149.1 or .2 and/or local codes.
___________________________
II - Preparation of the Gas Utilization Equipment
Clean the appliance, heat exchanger interior,
combustion chamber, 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
Part 1 Installation
Specifications NATURAL or PROPANE Gas
Air Delivery
(Approximate air delivery at zero draft)
Maximum Firing Rate**
Minimum Firing Rate**
Tube Diameter
Tube Length
Combustion Chamber Size
100 MBH ***
200 MBH ***
300 MBH ***
Gas Pressure Required
NATURAL or PROPANE
Electrical Supply Standard
Flame Safety
Main Automatic Valve
EC 200 EC 300
40.0 SCFM* 60.0 SCFM*
200 MBH*** 300 MBH***
70 MBH*** 90 MBH***
4 inches 4 inches
7.50 inches 7.50 inches
Recommended Minimum W & H
8" W x 8" H
10" W x 10" H
14" W x 14" H
6.0" to 14.0" W.C. 6.0" to 14.0" W.C.
120/1/60, 2.0 Amps 120/1/60, 3.0 Amps
230 volts 50/60 hz **** 230 volts 50/60 hz ****
24V Electronic Flame Safety, with 100% shut-off, 30-
second pre-purge.
3 Function Redundant 3 Function Redundant
General information
CAUTION: The ECONOMITE EC Series is not intended for
outdoor installation and must be protected from excessive
moisture. Provide adequate clearance for service and proper
operation. ___________________________
Before installation, read these instructions carefully.
The EC 200 / 300 burner is a gas power burner designed for
firing natural or propane gas in most applications. The burner is
a self-contained unit consisting of a blower assembly, burner
head, ignition control and a combination gas valve. The burner
installation involves mounting the burner to the gas utilization
equipment, piping the gas train and connecting the power
supply. Every burner is operationally fire tested at the factory
prior to shipping.
___________________________
I - Ventilation
If the former automatic oil burner provided trouble-free
operation, then the gas utilization equipment area should have
sufficient air for combustion and the 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
2
Notes:
* SCFM=Standard Cubic Feet/Minute
** Ratings based on 1,000 BTU/cu. ft. NATURAL, 2500 BTU/cu. ft. PROPANE at Sea Level.
***1 MBH=1,000 BTU/Hr.
**** Available - Contact Factory
Derate burner for altitudes over 2,000 feet by 4% for each 1,000 feet above sea level.
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3
Part 1 Installation
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.
___________________________
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, an existing oil burner
combustion chamber liner can be used, if in good condition.
Install mounting flange to the burner blast tube. The
distance from the flange to the blast tube edge should be
same as the gas utilization equipment wall thickness plus
the flange gasket thickness. This will allow the burner blast
tube to be flush with the inner chamber wall after the burner
is installed. If the blast tube extends into the combustion
chamber serious damage to the burner may occur, voiding
the warranty, see Figure 1 & 2 for reference. For minimum
combustion chamber dimensions see Table 1.
Mount the burner to the appliance. Use the supplied
gasket to assure a tight seal between the mounting flange
and front plate gasket.
With a wet base boiler, where the entire combustion
chamber is comprised of heat exchange surfaces and no
combustion chamber liner was provided for oil firing, a liner
is usually not required. A liner or target wall may be
necessary if the combustion chamber is unusually short.
To avoid flame contact on the heat exchanger walls or
flueways.
Use 2300°F minimum insulating material when the
application requires the construction or replacement of a
combustion chamber liner
The burner tube must be sealed air tight into the
combustion chamber liner opening with refractory material
as shown by Figures 1 and 2.
CAUTION: In no case should the burner tube be
allowed to extend into the combustion chamber; it
must be set flush with the inside surface.
WARNING: Burner cabinet must be mounted in
orientation shown in Figures 1 and 2. Any other
mounting 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 burner nozzle is free of foreign materials and that the elec-
trodes have not been damaged or displaced, see Figure 8.
___________________________
IV - Chimney, Vent Connector, and Draft Control
WARNING: The chimney should be inspected for
unsafe conditions such as deteriorated masonry and
excessive soot or other blockage. Installation must
conform with local codes. In the absence of local codes,
the recommendation installation compliance is with ANSI
Z21.8b latest edition and NFPA, ANSI Z223.1 latest edition.
WARNING: The Vent Connector shall not be connected
to a chimney that is venting solid fuel burning from any
equipment, any incinerator or any open fireplace.
The Vent Connector shall be made of non-combustible,
corrosion resistant material capable of withstanding the vent gas
temperature produced by the appliance 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 chimney and a single gas utilization equipment shall
Figure 1: Dry Base Boiler with Combustion Chamber
Liner (Similar to Warm Air Furnace Construction)
Figure 2: Wet Base Boiler with Combustion Chamber Unlined
Gas Input
MBH* Width/Height "
100
150
200
250
300
8"
9"
10"
10"
10”
Length "
8"
9"
10"
10"
11”
Table 1: Minimum Combustion Chamber Dimensions
* 1 MBH = 1,000 BTU/Hr
Source: ANSI Z21.8b 1993, Installation of Domestic Gas
Conversion Burners. For other applications, consult factory.
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low voltage (check white and green wire to earth ground)
from other equipment as that can cause the electronic
flame safeguard to malfunction.
Each installation must include suitable limit controls.
The existing oil burner combination limit and operating
controls are NOT SUITABLE for gas burner safety and
operation.
Set the thermostat heat anticipator to the current draw
of the gas burner. The current draw of the gas burner 24V
operating circuit is 0.7 amps.
CAUTION: Label all wires prior to disconnection
when servicing controls. Wiring errors can cause
improper and dangerous operation. Verify proper
operation after servicing.
___________________________
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 fittings. 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 barometric draft regulator shall be installed
in the same room 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.
________________________
V - Electrical
CAUTION: Do not add any power
consuming devices in the low voltage circuit to
prevent overloading of the transformer.
Note: If any of the original wiring as supplied with
the conversion burner must be replaced, it must be
replaced with type TFF wire or equivalent.
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.
Electrical installation must be made in
accordance with the United States National Electric
Code, ANSI/NFPA No.70-latest edition or Canadian
Electrical Code, Part 1, CSA Standard C22.1 and
applicable local code. If the burner is a part of a
gas utilization equipment system, check the wiring diagram as
supplied by the manufacturer.
Refer to the wiring diagram Figure 5 or the same wiring
diagram supplied on the inside of the burner wiring enclosure.
There are three leads (black - L1, white - L2 and green -
ground) and two thermostat wire leads (blue) inside the wiring
enclosure. For proper operation, the burner must be
electrically grounded.
Use 14 gauge copper wire for line voltage wiring. Be sure
to connect to a permanent live circuit. Provide a fused on-off
disconnect switch carrying a minimum 3 amp fuse.
The frame of the burner must be well grounded. A terminal
is provided in the control box for grounding.
Confirm that the polarity is correct; L1 to black wire, neutral
to white. The neutral line should not be subjected to induced 4
Part 1 Installation
Figure 3: Draft Hoods
Figure 4: Location for Barometric Draft Regulator
Figures 3 and 4: Copyright by the American Gas Association.
Used by permission of the copyright holder.
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5
Part 1 Installation
VI - Piping
CAUTION: The available gas pressure should be
within the limits shown in the SPECIFICATIONS
section. Excessive pressure will damage the
Combination Gas Valve and Regulator. If the supply
pressure exceeds the 14.0" W.C. maximum, a suitable
intermediate main regulator must be installed ahead of
the Main Manual Shut-Off Valve shown in Figure 6.
The burner gas supply piping should branch off from the
main line as close to the gas meter as possible. Do not con-
nect to the bottom of a horizontal section. Use new black pipe
and malleable fittings free of burrs.
Provide a sediment trap, union and 1/8" pressure tap in
piping close to burner as shown in Figure 6.
Use pipe joint compound approved for use with natural and
liquid petroleum gases.
Piping must comply with local codes.
To obtain the maximum firing rate of the burner, the fuel
gas supply piping must be sized to provide a minimum of 6" w.c.
pressure to the inlet of the combination valve when the burner
and all other gas appliances are on.
When pressure testing the supply piping, the burner valve train
must be protected.
CAUTION: If the test pressure is 0.5 PSIG or less, closing
the Main Manual Shut-Off Valve will suffice.
DANGER: Explosion hazard.
Do not use oxygen for pressure testing. An
explosion could occur during initial start-up.
Figure 5: Wiring Diagram
Figure 6: Piping Connections
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Capacities shown are for a total pressure drop of 0.3"W.C.
For 0.5"W.C. pressure drop, multiply capacity shown by 1.3.
Propane capacities shown are for a total pressure drop of
0.5” W.C. For higher permissible pressure drops, consult
your gas supplier. Table 2: Schedule 40 NPT
Pipe-Capacity Chart
10
200
590
400
1075
900
40
275
200
500
450
1040
650
75
190
150
360
325
750
475
20
150
400
275
730
600
900
Pipe
Size
3/4
3/4
1
1
1 1/4
1 1/4
1 1/2
1 1/2
Natural
Propane
Natural
Propane
Natural
Propane
Natural
Propane
100
160
300
275
630
400
975
Approximate Capacity -MBH
Pipe Length
Type
of Gas

If the burner piping must be rearranged because of space
limitations, be sure to carry out the general arrangement shown
in Figure 6. The Combination Gas Valve will operate and can be
installed in any position except up-side down.
When the burner is installed in jacketed equipment, it is
recommended that the Combination Gas Valve be left adjacent
to the burner within the vestibule. The Main Manual Shut-Off
Valve can be installed outside of the jacketed equipment.
___________________________
VII Main Gas Spud
The EC200 and EC300 burners are approved for use with
NATURAL or PROPANE gas only, and should be used only with
the gas specified on rating plate.
A Standard Model EC Series Economite is shipped ready
for NATURAL gas and is field convertible to PROPANE gas, see
Table 3.
As shipped, the EC200 has no spud installed, manifold
pressure set at 4.1" w.c., air restrictors off and the air shutter full
open. As shipped the EC 300 has no spud installed, manifold
pressure set at 4.0" w.c., air restrictors off and the air shutter full
open. OEM applications will be set based on the equipment
requirements.
If the required firing rate does not fall within the range of
the installed orifice, or if converting to PROPANE gas, use
Table 3 to select the spud with the correct orifice size (stamped
in inch diameter) for the desired capacity from the spare orifice
bag assembly.
To change the orifice, turn off the Main Manual Shut-Off
Valve and the main electric to the burner. Refer to piping
diagram, Figure 6, to locate the orifice location if required.
WARNING: Reposition the combustion air shutter for
the maximum firing rate of the selected orifice capacity
range.
CAUTION: The approximate air and gas settings
described below are for initial start-up only. Final start-up
settings must be made in accordance with Section VIII,
Burner Set-Up/Adjustment Instructions for the manifold gas
pressure are detailed in Section XIII, Combination Gas
Valve. ___________________________
VIII - Burner Set-Up/Adjustment
WARNING: Ignition is automatic. Make spark
observations into combustion chamber only with Main
Manual Shut-Off Valve closed. Confirm that gas
utilization equipment does not contain any
accumulated gases. Purge as described in Step 10
below.
1.Before burner start up, be sure to study and familiarize
yourself with the exact sequence of operation and all other
details of this burner and the gas utilization equipment.
2.Check the burner piping and valves for gas leaks by
applying a weak liquid soap solution to unions and joints
with the gas supply on. Leakage will be indicated by the
appearance of soap bubbles. Locate and correct all gas
leaks before proceeding.
3.Purge the air from the gas supply line to expedite the first
light off.
4.Ensure the gas utilization equipment is in the proper
operating condition.
5.Attach two gas manometers to the burner. Connect one
to the inlet pressure tap of the gas valve and the other to
the outlet pressure tap of the gas valve.
6.Connect a microampmeter to the ignition controller
to monitor the flame signal during the start up process.
Refer to the ignition control specification sheet that is
supplied with the burner for proper flame signal
requirements and sequence of control operation.
NOTE: Midco International reserves the right to change
ignition controller or other components without notice.
7.Set the burner air shutter to the proper setting according
to the recommended data in Table 3 for zero draft
condition.`
8.To RE-SET the Electronic Burner Control a manual re-set
is required. Turn the operating control to Off or set the
thermostat below room temperature for at least 30
seconds, or remove the 24v for a
period of 5 seconds, see Section XIV,
Electronic Burner Control.
9. Confirm that Main Manual
Shut-Off Valve is open. Turn Manual
Gas Cock Knob on Combination Gas
Valve to ON.
CAUTION: Purge gas to outside
the building. Do not purge into the
gas utilization equipment.
10. Turn the combination valve knob
on. Turn the burner power on. Turn
operating control to ON or set
thermostat above room temperature.
After four seconds the blower motor
will be start to purge the combustion
chamber. Main flame should come on
after a 30 second pre-purge.
Part 1 Installation
EC 200 Natural Gas
Heat Input
BTU/Hr Manifold Gas
Pressure "w.c.
70,000
100,000
150,000
*200,000
2.6
1.0
2.6
4.1
Air Shutter
Position
1.0
2.0
7.0
9.0
Orifice
Size
0.173"
None
None
None
Air
Restrictor
On
On
On
None
Propane Gas
Manifold Gas
Pressure "w.c.
1.2
2.3
1.2
1.8
Air Shutter
Position
1.0
2.0
7.5
9.0
Orifice
Size
0.173"
0.173"
None
None
Air
Restrictor
On
On
On
None
EC 300 Natural Gas
Heat Input
BTU/Hr Manifold Gas
Pressure "w.c.
90,000
150,000
200,000
250,000
*300,000
2.5
1.3
2.2
2.9
4.0
Air Shutter
Position
1.0
3.0
6.5
6.0
9.0
Orifice
Size
0.173"
None
None
None
None
Air
Restrictor
On
On
On
None
None
Propane Gas
Manifold Gas
Pressure "w.c.
1.1
2.8
1.2
1.6
2.1
Air Shutter
Position
1.0
3.0
6.0
6.0
9.0
Orifice
Size
0.173"
0.173"
None
None
None
Air
Restrictor
On
On
On
None
None
Table 3: Recommended Air Shutter Setting at Zero Draft Conditions and Orifice Size
*As Shipped from Factory
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6

7
Part 1 Installation
Whenever the burner fails to light during the 7-second
ignition trial period, or if the flame is lost during the burner
run cycle and not re-established within 37 seconds, the
Electronic Burner Control will shut off the Combination Gas
Valve and LOCK OUT. To RE-SET see step 8 for restart.
At the end of the purge cycle, typically 30 seconds, the
combination valve will be energized and a spark will be
initiated at the same time. The trial for ignition will be
approximately seven seconds.
11. To make a preliminary setting of the burner input,
determine the manifold gas pressure required from
Table 3 and adjust the Combination Valve Pressure
Regulator accordingly, see Section XIII, Combination Gas
Valve.
WARNING: Repeated unsuccessful attempts to
light will result in accumulated gases in gas utilization
equipment and chimney. To prevent these gases from
reaching an explosive level, periodically purge the gas
and chimney.
12. If ignition failure occurs, the main power must be
turned off to reset. If the burner fails again refer to the
trouble chart.
13. Readjust the combustion air shutter to provide a quiet,
soft blue flame with well defined orange and yellow tips for
NATURAL gas or with well defined yellow tips for
PROPANE.
14. Check the operation of the burner; start and stop it
several times with the thermostat or operating control.
15. With the burner running, check the operation of all limit
and associated safety controls.
16. PERFORM THE FOLLOWING FINALADJUSTMENTS
for combustion and flue gas temperature. Take the flue gas
samples and temperature immediately ahead of the draft
control.
A.The flue gas temperature should be above 325°F but
not exceeding 550°F. Excessive flue gas temperatures will
result in low efficiencies. Low flue gas temperature may
cause excessive condensation. Reset gas input if
necessary to adjust stack temperature.
B.Make the final setting of the combustion air shutter by
checking the flue gases with an ORSAT or similar
combustion testing instrument. The carbon monoxide content
should conform to local codes, or in their absence to the level
specified in the United States or Canadian Standard referenced
on the front cover of this manual; and the carbon dioxide con-
tent should be approximately 9.5% for NATURAL and 12.1%
for PROPANE, or within the limits prescribed by local codes.
17. Check the draft control to make sure there is no spillage of
flue products into the room.
Note: For subsequent normal starting and shut-off procedure,
refer to CONSUMER INSTRUCTIONS or to the lighting
instruction plate mounted on the burner.
___________________________
IX - Determining the Firing Rate
To determine the firing rate for NATURAL gas accurately, use
time test dial to determine the number of seconds for one
revolution and use the following formula.
Then divide by 1,000 for MBH value:
For PROPANE gas, consult your supplier for method of deter-
mining firing rate.
___________________________
X - Air Restrictor
When the EC 200 burner is to be used at 150 MBH/hr and
below, or EC 300 burner is to be used at 200 MBH/hr and
below, the air restrictors should be installed on the burner head
to get the best combustion performance.
For easy installation follow the steps below.
1.Check the associated package containing two air
3600 x test dial size x BTU value
No. of seconds for one rev. test dial. = BTU/Hr.
3600 x 1 x 1000
20 = 180,000 BTU/Hr. = 180 MBH
Example:
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Figure 7: Air Restrictors

restrictors (A & B), four 8-32 x 5/16 socket screws and four
#8-32 nuts. NOTE: There is a slight difference between the
two air restrictors.
2.Disassemble the blast tube from the blower housing by
removing the nuts on the flange.
3.Put the air restrictor A in the place, see Figure 7 for
reference. The air restrictor A should be installed on the
back side of the burner head; on the same side of the
electrodes. Install one screw in the middle hole of air
restrictor and put one nut on the screw.
4.Put the air restrictor B in the place, see Figure 7 for
reference. Install one screw in the middle hole of air
restrictor and put one nut on the screw.
5. Line up two air restrictors and put the other two screws in
place. Then tighten four of them.
6.Assemble the blast tube back to the blower housing.
___________________________
XI - Nozzle and Electrodes
DANGER: Be sure that the Main Manual Shut-Off Valve,
Combination Valve and Burner Power Switch are turned off
before removing any parts for service.
Service will normally consist of inspection and cleaning.
Check the electrodes for deterioration and the insulators for
cracks. The electrodes are adjustable. If defective replace. Be
sure to replace the rubber boot over the spark electrode and
treat electrode leads with care. Due to high voltage any damage
to the insulation is a potential leak path. When a new electrode
is installed, be sure to set the spark gap and flame sensor
dimensions, as shown in Figure 8.
___________________________
XII - Blower Assembly
Cleaning of the blower wheel is usually the only
service required. Need for cleaning is indicated if the air
inlet of the burner housing shows an accumulation of dust
and lint, or if the character of the flame—long, hazy and yel-
low (sooty)—indicates a deficiency of air. Motor air cooling
vents, if present, should also be cleaned at this time.
___________________________
XIII - Combination Gas Valve
The 24 volt Combination Gas Valve serves three functions:
1.Manual Gas Shut-off
2.Manifold gas pressure regulation
3.Automatic electric redundant (double seated) gas valve
For manual control the Manual Gas Cock Knob is
turned full ON or full OFF.
The Combination Valve Gas Regulator is factory set for
4.1" W.C. for the EC 200 and 4.0" for the EC 300. Manifold
Gas Pressure Tap is located on the outlet end of the
Combination Valve body.
If pressure adjustment is required to change settings,
remove regulator cap for access to slotted adjustment
screw. Turning of adjustment screw counterclockwise
reduces pressure; clockwise increases pressure. Do not
adjust past the point where no change in pressure is noted.
Note: Pressure setting can only be made with burner
running and gas on.
CAUTION: If the gas supply pressure is below its
specified range during adjustment, an overfire
condition could result when normal pressure returns,
particularly if the regulator adjustment screw is
bottomed out. ALWAYS confirm that at least the
8
Part 1 Installation
Figure 8: Retention Plates
Midco International Inc. - Chicago IL - www.midcointernational.com

Part 2 Service and Maintenance
9
minimum rated gas pressure is being supplied to the
burner during regulator adjustments, and NEVER
bottom out regulator screw.
If the pressure regulator fails to maintain a constant
manifold gas pressure within ±0.1" W.C., and it is confirmed
that the inlet gas pressure to the Combination Gas Valve is
a steady 14.0" W.C. maximum during standby, and a
steady 6.0" W.C. minimum with the flame on, the regulator
portion of the gas valve is defective and the entire gas
valve must be replaced.
CAUTION: If the Combination Gas Valve has been
moved or replaced, perform test for leaks with the
burner running.
CAUTION: If leakage through the gas valve occurs
on standby, as evidenced by the presence of any flame,
the entire gas valve needs to be replaced.
___________________________
XIV - Electronic Control
Operation - Power Up/Standby: Upon applying power
(24 volts) to 24VAC, the control will reset, perform a self
check routine, initiate full time flame sensing, flash the
diagnostic LED for up to four seconds, and enter the
thermostat scan state.
Heat Mode: when a call for heat is received from the
thermostat, the control will check the internal blower motor
interlock switch for normally open contracts. The combustion
blower is then energized and once the internal blower motor
interlock switch contacts close, a pre-purge delay begins.
Following the pre-purge period the gas valve is energized and
spark will commence for the trial for ignition period.
When flame is detected during the trial for ignition, spark
should shutoff immediately while the gas valve and combustion
blower remain energized. The thermostat, internal blower motor
interlock switch, and main burner flame are constantly
monitored. When the thermostat is satisfied and the call for
heat ends, the main valve is de-energized immediately, the con-
trol senses the loss of flame signal and initiates an (optional)
post-purge period before de-energizing the combustion blower.
Failure to Light - Lockout: Should the main burner fail to
light, or flame is not detected during the trial for ignition period,
the control will go into lockout. The valve will be turned off
immediately, and the combustion blower will be turned off fol-
lowing an optional post purge period.
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 or submerged.
___________________________
Maintenance
Keep the area around the burner clear and free of combustible
materials, gasoline and other flammable liquids or vapors. Do
not obstruct burner air inlet or ventilation air.
The motor features permanently lubricated ball bearings
and requires no routine oiling or maintenance.
IMPORTANT: Check the burner flame periodically. A proper
NATURAL gas flame will appear blue at the burner face with
orange and yellow tips. A proper PROPANE gas flame will
appear blue at the burner face with yellow tips. If the flame is
too rich, it will appear billowy and yellow with hazy tips. If too
lean, it will appear short and all blue. If the flame does not
appear proper, CONTACT A QUALIFIED SERVICE
TECHNICIAN FOR CLEANING, READJUSTMENT AND/OR
REPAIR.
WARNING: If any flame is observed when the burner is
on standby, or if the ignition spark or gas valve operator is
heard to come on before the motor reaches operating
speed, immediately turn off the Main Manual Shut-off Valve
and power to the burner. A dangerous condition has devel-
oped and must be corrected. CONTACT A QUALIFIED
SERVICE TECHNICIAN FOR CLEANING, RE-ADJUSTMENT
AND/OR REPAIR.
WARNING: If PROPANE gas is used 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 areas or confined spaces. This would create a
dangerous condition and cause an explosion or fire. If you
suspect a gas leak, follow instructions on front cover of
this manual.___________________________
Maintenance
Midco International Inc. - Chicago IL - www.midcointernational.com

Isometric View
10
Figure 9:Isometric of EC200 and EC300
Midco International Inc. - Chicago IL - www.midcointernational.com

11
Consumer Instructions
Item #Part # Description Qty 1a 5236-20 EC200 Burner Head Assembly 1 1b 5236-19 EC300 Burner Head Assembly 1 2 5232-25 Flame and Spark Rod Bracket 2 3 5236-16 EC200/EC300 Spark Rod Assembly 1 4 5236-18 EC200/EC300 Flame Rod Assembly 1 5 8452-44 Bracket Spacer 2 6 5236-43 Air Restrictor Pack Includes Orifice (.173),
Orifice Spring and Hardware 1
7a 5236-13 EC200 Blast Tube 1 7b 5236-14 EC300 Blast Tube 1 8 8495-04 1/2" Elbow 1 9a 8437-57 EC200 Motor Blower Assembly
(Includes Wheel and Motor) 1
5236-64 EC200 Blower Wheel 1 5236-66 EC200 Blower Motor 1
9b 8437-56 EC300 Motor Blower Assembly
(Includes Wheel and Motor) 1
5236-65 EC300 Blower Wheel 1 5236-67 EC300 Blower Motor 1
Item # Part # Descriptions Qty 10 5236-26 EC200/EC300 Washer
EC200 4 EC300 7
11 8487-50 1/2" Close Nipple 2 12a 5236-17 EC200 Special Washer 1 12b 5236-15 EC300 Special Washer 1 13 8493-67 1/2" Full Coupling 1 14 8487-52 1/2" X 2" Long Nipple 1 15 8494-02 1/2" Tee 1 16 5726-72 R Main Spud-173 Dr (#17) Orifice 1 17 6622-30 Orifice Spring 1 18 8496-17 1/2" Square Solid Plug Male 1 19 8492-51 3/4" X 1/2" Hex Bushing 1 20a 8419-70 EC200 -Redundant Combination
Slow Opening Valve 1
20b 8419-75 EC300 Direct Spark Gas Valve
Slow Opening Valve 1
21a 5236-48 Air Shutter Assembly EC200 1 21b 5236-47 Air Shutter Assembly EC300 1 22 5236-35 Inlet Ring And Air Screen Weldment
EC200 Only 1
23 8480-37 4" X 4" Box Cover 1 24 8429-51 EC200/300 Control 1 25 8484-75 Strain Relief 1 26 8505-93 SAEJ2031 Ignition Cable Assembly 1 27 8505-94 Flame Rod Wire Assembly 1 28 5236-23 Control Assembly
(Includes Control; Transformer and Box) 1
Not Shown 8452-16 Mounting Flange Kit 8447-30 120/208/240-24V 40V Transformer 7400-20 Wire Kit
Lighting Instructions
1.Set operating control to OFF or thermostat
below room temperature for at least 30 seconds.
2.Turn manual gas cock knob on combination valve
to ON.
3.Turn burner power ON.
4.Set operating control to ON or thermostat to call
for heat (there is a 30 second pre-purge).
5.Wait 37 seconds. If burner fails to light, or if
burner lights then goes out and system goes into
safety lockout, de-energize the system by setting
operating control to OFF or thermostat below
room temperature for at least 30 seconds to reset
the system. Then set operating control to ON or
thermostat to call for heat.
TO SHUT OFF
1.Turn manual gas cock knob on combination gas
valve to OFF.
2.Turn burner electrical power OFF.
SHOULD OVERHEATING OF THE GAS
UTILIZATION EQUIPMENT OCCUR:
1.Shut off the main manual shut-off gas valve to
the equipment.
2.DO NOT shut off the power switch to the burner,
the equipment pump or blower.
___________________________
Parts List
Parts List for
EC200 and
EC300
Midco International Inc. - Chicago IL - www.midcointernational.com
Important: Availability of parts as well as specifications are subject to change without notice. Please consult factory for item availability. Avoid errors in parts selection, when ordering, use complete Midco Part number and description. Furnish burner model number, bill of material number and date code from the Specification Plate located on the burner.

6.With blower motor running, confirm that 24V power is
present at PSW terminal on the electronic burner control and
Ground. If power is not present, check wires and wire
connections of the internal motor interlock switch (2 red wires
exiting the motor). If the blower motor is running and the
internal blower motor interlock switch is open, replace the
blower motor.
7.After 30 second blower motor pre-purge, confirm 24V
power at V1 terminal on electronic burner control and
Ground. If power is not present, replace electronic burner
control.
NOTE: After the pre-purge period, the controller will
simultaneously energize the gas valve and send power to the
spark rod, causing an ignition spark at the end of the rod.
CAUTION: Spark generating circuit is
HIGH VOLTAGE !
If an ignition spark is not present at the tip of the spark rod,
turn the power supply OFF. Inspect ignition wire/connectors,
spark rod, spark rod positioning, spark rod gap and spark rod
ceramic insulator. Adjust, repair or replace as necessary. If
an ignition spark is still not present, perform a spark test on
the electronic burner control per the electronic burner control
manufacturers recommendations. If spark test fails, replace
electronic burner control.
8.Once ignition spark is present, main flame should be
present. If not present:
A. Confirm that there is no air in gas line. If so, purge
air from gas line.
B. Confirm that 24V power is being delivered to the
gas valve (V1 and V2 on electronic burner control).
C. Check for adequate flame current signal strength
with an electrical meter (Refer to the electronic
burner control manufacturers specification sheet that
is supplied with the burner as noted in Section VIII,
sub-section 6).
9.Once main flame is established and flame current signal
strength is good, proceed to "Part 2 Service, Section VIII
Burner set-up/ adjustment" to finalize the burner set-up.
NOTE: ELECTRICAL AND FLAME CHECKS MUST BE MADE
IN ORDER LISTED.
1.Check status of electronic burner control diagnostic
indictor LED.
A. LED On = electronic burner control fault.
B. 1 flash = air flow fault.
C. 2 flashes = flame with no call for heat.
D. 3 flashes = ignition lockout.
2.Confirm that both main manual shut off valve and
manual gas cock knob on combination gas valve are in the ON
position. Make sure that the thermostat, operating controls and
safety controls are calling for heat. Defective wiring or loose
connections can simulate malfunctioning components: or any of
the conditions below. Check associated wiring and connectors
before replacing a component. Whenever the burner fails to
light during the seven second trial for ignition, or if the flame is
lost during the burner run cycle and not re-established within 37
seconds (30 second pre-purge), the electronic burner control
will shut OFF the combination gas valve and lockout the burner.
To reset, set the operating control to OFF or thermostat below
set point for at least 30 seconds.
3.Confirm that:
A. Burner is properly grounded (Green wire to
ground).
B. Line voltage is present between L1 (Black wire) and L2
(White wire). If not present, check line power source.
C. Line voltage is present between L1 (Black wire) and
Ground (Green wire).
D. There is no voltage present between L2 (White wire)
and Ground (Green wire)
4.Confirm that 24V is present at:
A. Transformer, 24V secondary side (Yellow wires).
If not present, replace transformer
B. R terminal on electronic burner control and Ground.
C. First Blue wire in electrical box labeled "T"
(thermostat) and Ground, second Blue wire in
electrical box labeled "T" (thermostat) and Ground. If
power is only present at one Blue wire, check
thermostat and thermostat wiring.
D. TH terminal on electronic burner control and Ground.
If no power is present at TH terminal, check thermostat
and thermostat wiring.
5.Blower motor should now be ON. If ON, proceed to step 7.
If not ON:
A. Confirm that line power is present at IND wires at the
electronic burner control
NOTE: IND wires exit the back side of the electronic burner
control and one IND wire goes to the line power hot side of the
blower motor (White and Blue wires for 115V, White and Black
wires for 230V).
B. Confirm that line power neutral (L2, White wire) is
connected to motor neutral wires (Orange and Black
wires for 115V, Orange and Blue wires for 230V). If
line power is being delivered to the blower motor and it
is not running, replace the blower motor.
Trouble Chart
Midco International Inc.
4140 West Victoria Street * Chicago, Illinois 60646
tel [phone] * fax [phone]
web www.midcointernational.com email [email protected]
704
8471 38
Printed in USA

Economite Legacy Series
EC200 & EC 300
Power Gas Burners
Economite Legacy Series
EC200 & EC 300
Power Gas Burners
Quality Designed for Proven Performance
Midco International is proud to announce an addition to
its legendary Economite Power Gas Burner line. The
standard Economite EC Series Power Gas Burners are
engineered to match a wide variety of applications or
customized to meet OEM applications. The compact
design not only meets or exceeds industry standards;
it also packs a lot of power for its size. Sheet metal
construction affords high volume production and shorter
lead times giving you a better-cost value ratio. Each unit
is fully assembled and factory fire tested assuring you
a high quality performance product. Installation is
effortless with our integrated junction box and universal
mounting flange.
Space Saving Design
Rock Solid
Packed with Power
All Rolled into One Great Burner!
Economite Legacy Series
EC200

Midco International Inc.
4140 West Victoria Street
Chicago, Illinois 60646
tel [phone]
fax [phone]
web www.midco-intl.com
email [email protected]
Quality Designed for Proven Performance 508
8474 84
Printed in U.S.A.
Specifications
Diameter
of
Nozzle
Maximum
Nozzle
Insertion Depth
Design
Certifications or
Listed by
Gas
Connection
Pipe Size
Minimum
Input
Rating*
EC200 70,000* 200,000* 3/4 " NPT 6.0 " to 14.0" W.C 4.0" 6.0 " 1/22 U.L./C.U.L Listed 24V 14.5lb
EC300 90,000* 300,000* 3/4 " NPT 6. 0" to 14.0" W.C 4.0" 6.0 " 1/12 U.L./C.U.L Listed 24V 15.5lb
*BTU/HR
Flame Safety: Direct Spark Ignition
with100% shut-off,
30 second pre-purge, 3 Function
Redundant 1/2”NPT Main
Automatic Gas Valve
The EC Series is available as a fully assembled power
burner with an integrated burner control system. For further
information please contact [email protected]
Gas Pressure
Required Natural
or Propane
Motor
HP
Maximum
Input
Rating*
Model
Number
Shipping
Weight
Primary
Safety
Voltage
Electrical Supply:
120/1/60, 3 AMP (Standard)
230 Volt 50/60HZ (Available - Contact Factory)
Whether you purchase an ‘off the shelf’ unit or have us create one to fit your needs, you can be assured of having
purchased the finest combustion power gas burner in the industry. Do you need assistance in burner selection,
installation or service? Just call Midco International direct today or visit our web site at www.midcointernational.com
and locate your local representative to find out more about our Economite EC Legacy Series burners.
Features and Benefits
The EC-200 / EC-300 Technology Provides . . .
. . . Compact Design and Small Footprint
- light weight for lower shipping cost
- space saving
...Universal Mounting Flange
- Application flexibility
- universal bolt pattern
- OEM welded flange available
. . . Air Shutter Positive Lock Fitting
- no shifting of air shutter caused by vibration
- reduction of unauthorized adjustment
. . . Adjustable External Air Shutter with Indication
- visual indication of air shutter position
- faster burner set up
...Field Convertible Triple Function Redundant
Gas Valve
- can use either Natural or LP gas
- one valve to stock for servicing
...Permanently Sealed Ball Bearing Motor
- Quiet and maintenance free
A B C D E F G** H
EC200 5 5/16" 3 11/16" 7 1/2" 8 5/8" 7 1/2" Ø 4" 6 13/16" 6 13/16"
EC300 6 9/16" 3 11/16" 8 1/4" 8 5/8" 7 1/2" Ø 4" 6 13/16" 9"
EC200 / EC300
Side View
EC200 / EC300
Front View
. . . Interchangeable Stainless Steel Burner
Retention Heads
- compatibility to different applications
- operation under variable draft or positive
pressure condition
- firing into small combustion chambers
. . . Integrated Direct Spark Ignition System with
Pre-Purge
- compliance with ANSI Z21.20 standard
- timed pre-purge clears the combustion
chamber before ignition cycle
- proper sequencing of the burner operation
. . . Light and Compact Removable Burner
Assembly from the Burner Tube and Flange
- ease of serviceability and correct burner
alignment
. . . Pre-Piped, Pre-Wired, Factory Fired Tested
- ease of installation
- reliable operational sequence
Universal
Mounting
Flange
** Approximate

LEGEND
CENTRIFUGAL PUMP
OUTLET CONNECTION
INLET CONNECTION
MANUAL BUTTERFLY VALVE
SWING CHECK VALVE
SOLENOID VALVE
MANUAL BALL VALVE
24 VAC
18 AWG. MIN
24 VAC
18 AWG. MIN
N
L
L1
L2
L3
G
HL PUMP
HL RECIRCULATE
G
IMM HEATER
HL LEVEL SENSOR
HL FILL
HL FILL SENSOR
HL TO BH
HL RTD
+
-
COM
18-24 AWG.
L
NA
DETAIL A
SCALE 1 : 5
P
T
BREWHOUSE HOT LIQUOR
FILTERED WATER SUPPLY
BREWHOUSE HEAT EXCHANGER RETURN
DRAIN / MISC.
23
L1
L2
L3
NOTES:
1. ALL WIRING TO CONFORM TO LOCAL CODES
2
TANK MUST BE GROUNDED BACK TO BREWHOUSE J-BOX
2
3. LAYOUT SHOWN FOR CONCEPT, ACTUAL EQUIPMENT
MAY VARY
4
4
4
CHOOSE WIRE GAUGE BASED ON DEVICE POWER
24 VAC
18 AWG. MIN
L
N
D
C
B
A
B
C
D
1 2 3
4 5
6
7
8
8
7
6
5
4
3
2
1
E
F
E
F
SHEET 1 OF 1
C. ENEGREN
1
SCALE: 1:1
WEIGHT:
REV
DWG. NO.
C
SIZE
TITLE:
NAME
DATE
COMMENTS:
CHECKED BY:
DRAWN BY:
A
CUSTOMER APPROVAL:
PROPRIETARY AND CONFIDENTIAL
THE INFORMATION CONTAINED IN THIS
DRAWING IS THE SOLE PROPERTY OF
PREMIER STAINLESS SYSTEMS LLC. ANY
REPRODUCTION IN PART OR AS A WHOLE
WITHOUT THE WRITTEN PERMISSION OF
PREMIER STAINLESS SYSTEMS LLC IS
PROHIBITED.
7/15/13
ELECTRIC HOT LIQUOR
SYSTEM
N/A

Vent tee, with barometric
damper
Dilution air
Flue Stack Requirements
Flue vent will slide over
receiving flange. Flue can
be screwed to receving
flange or sit loose.
Ensure all minimum clearance
to all combustable materials are
met (see note 7)
Combustion analysis ports
provided
Flue gases
1. All Premier Stainless Direct Fire Brew Kettles
require the use of an approved exhaust gas vent stack
rated at 1000 degrees F or higher. Premier Stainless
recommends using a Class A double-walled, insulated
stack (or better). Use of any other type of stack with
a lower temperature rating is NOT recommended by
Premier Stainless Systems. For an example and
detailed information please visit the following website:
<http://www.mcmaster.com/#chimney-vents/=i6fqw2>
2. Refer to chimney gas vent manufacturer's
information for detailed installation instructions.
3. Terminate the chimney vent stack with a rain cap
except in those locations where high winds may
necessitate a Breidert type cap.
4. CAUTION: A horizontal stack run must not exceed
75% of the vertical stack height (NFPA 54 7.6.1d).
5. CAUTION: Never reduce the vent stack diameter
without written factory approval. Stacks over 20 feet
in height can sometimes reduce stack diameter.
6. Premier Stainless will provide initial burner start
up and settings. Premier Stainless recommends a
combustion test and gas analysis by a knowledgeable
technician with proper tools to ensure peak efficiency
of burner.
7. The chimney flue should extend at least 2 ft (0.6m)
above the highest roof surface or structure within 10
ft (3.0m) horizontally of the chimney to prevent down
drafts (follow local codes). Attach the female part of
the flue pipe to the vent flange using 3 self tapping
screws spaced equally around the pipe. Install a draft
regulator (barometric damper) if necessary, this will
help ensure stable draft conditions in certain cases.
When going through combustible material, all local
codes for insulated stacks, i.e. protective shield
clearances, must be met.
SIZE
Flue Stack Requirements
SHEET 1 OF 1
REV.
A
DWG. NO.
SCALE:1:80 Date: 8/9/2012 3:43:16 PM

Steam Vent Flange
B
Condensate Drip Leg
DETAIL B
Condensate Collection Ring
with Drainage Outlet
Steam Vent Requirements
Vent Notes:
Installation Instructions:
- Use Type 304 Stainless Steel material
- Kettle Steam Vapor Vent to be run outdoors from
top of kettle.
- Kettle Vent to be vertical if possible, if not limit bends
to 45 degrees.
- Kettle Steam Vapor Stack clearance to be based on
maximum temperature of 212
F.
- Kettle is an atmospheric, non-pressure rated vessel.
- Max temperature within kettle and kettle vapor stack
not to exceed 212
F.
- Kettle Vapor Vent to be vented outside as per local
code.
- See table for reference part number or use similar part.
- Bottom steam vent to be notched for condensate drip
leg clearance.
- Upper vent section to slip into lower vent section.
- Fasten using SS rivets or screws. Important to use water
tight fasteners.
- Vent should be capped off with rain cap unless heavy
wind environment dictates otherwise.
Brewhouse Steam Vent Table
Kettle Steam Vent Vendor Part Number
5BBL 6.00 in Mcmaster-Carr 18005K24
7BBL 8.00 in Mcmaster-Carr 18005K26
10BBL 8.00 in Mcmaster-Carr 18005K26
15BBL 10.0 in Mcmaster-Carr 18005K27
20BBL 12.0 in Mcmaster-Carr 18005K28
30BBL 12.0 in Mcmaster-Carr 18005K28
Whirlpool Steam Vent Vendor Part Number
20BBL 8.00 in Mcmaster-Carr 18005K26
30BBL 8.00 in Mcmaster-Carr 18005K26
Steam Vent
SHEET 1 OF 1
REV.
A
DWG. NO.
SIZE
SCALE:1:40 Date: 12/21/2017 10:36:45 AM

MOVING, RIGGING AND STANDING UP TANKS
RULE #1: BE CAREFUL! Everyone involved needs to be focused should a strap come
loose or a tank move in a way that is not expected. Serious injury or DEATH can result.
Premier Stainless highly recommends using a professional rigging crew to move and
place tanks!
For those customers that choose to do it yourselves, make sure you are using a triple
mast forklift in good working order. Straps, shackles and other lifting gear should be
checked for damage prior to use. A good set of fork extensions will be required in most
cases.
Following are some general instructions with photos:
When moving the tanks on the lift, if the tanks are suspended by the lifting lugs a
helper(s) should walk with the tank to control the swinging that will be encountered. If
the tank is lifted on the underside or leg crossbars a helper should still be used to “keep
a hand” on the tank to control any tendency to be off balance (if the rolling surface/floor
is uneven or sloped for drainage). In cases where the rolling surface is rough (potholes
in the street or similar obstacles) and will cause the lift to rock in an unpredictable way,
the tank should be strapped to the lift. Strapping can be done from the lugs to the lift’s
cage or mast and/or straps around the crossbars and forks. When bringing tanks
downhill strapping is advised to prevent the tank from sliding off the forks. Another
method to handle a downhill grade would be to back the forklift down the hill.

TRUCK ARRIVAL: Check load for damage, carefully de-strap load.
Insert the foot pegs, brewhouse pegs are typically put in the Mash Tun for ease of
access when moving/assembling the brewhouse. Cellar tank pegs and pads are
shipped with the tanks. Use of anti-seize on the threads is recommended.

Typical lifting of flat bottom tank
Lifting from the top lifting lugs with strap and shackles.