Model 415 OVENPAK® Burner
with connecting base and linkage
assembly to adapt customer's automatic
electric control motor
• Burns any clean fuel gas
• Fires into passing air streams
• Requires only low pressure gas
• Provides clean combustion with low NOx levels
• Compact burner design provides quick and easy installation
• Simple field adjustment and maintenance
Model “400” OVENPAK® Burner applications have included:
Air heating in ovens and dryers, paint finishing lines, paper and textile machines,
food baking ovens, coffee roasters, grain dryers, and fume incinerators. Manufactured under
U.S. patent #3,574,508; Canadian and European patents granted and pending.
Model EB-3 OVENPAK® Burner with
connecting base and linkage assembly
Typical piping layout with “Block and Bleed” gas train arrangement
Page 2103
Maxon Pre-Assembled Package
Model “400” OVENPAK® Gas Burner System
Model 435
OVENPAK®
Burner with preassembled “Block
& Bleed” pipe
train and prewired into
package system
• A complete “packaged burner” system for maximum efficiency
• Pre-assembled system includes:
– High turndown Model “400” OVENPAK
® Burner
– Completely assembled and pre-wired pipe train package
• Fast and easy installation with your choice of mounting options:
– Arranged for mounting onto your existing duct;
– Or mounted by Maxon in a pre-fabricated combustion heater/duct
Page 2104
Maxon Packaged Heater/Duct Sections
for Pre-Assembled OVENPAK® Gas Burner Systems
Model 425
OVENPAK® Burner
pre-assembled
package system,
installed and mounted
onto a Maxon prefabricated heater/duct
section
• Reduce your fabrication time and costly design details
• Easy mounting provided by flanged duct connection joints
• Application flexibility offered by:
– Three duct sizes
– Five capacity options
– Optional return/inlet duct opening positions
• Discharge air volumes up to 12,000 SCFM
• Handles discharge air temperatures up to 600°F (316°C)
OVENPAK® Burners are nozzle-mixing gas burners
for many industrial direct-fired applications where
clean combustion and high turndown are required.
They are simple and versatile for use on a variety of
heating applications.
The Model “400” OVENPAK® Burner (shown at
right) includes a combustion air blower with nonsparking paddle wheel-type impeller, pilot, spark
ignitor, stainless steel discharge sleeve, mixing cone,
self-contained internal air and gas proportioning
valves, and provision for your flame safeguard
sensor.
Right: Model 415 OVENPAK® Gas Burner with optional:
• combustion air filter
• connecting base and linkage assembly
• electrical control motor (by others)
Cross sectional view of a Model “400” OVENPAK® Gas
Burner
Principle of operation(illustrated at left)
The OVENPAK® Burner is designed for industrial
air heating applications. It is available in two basic
versions: 1) packaged with integral combustion air
blower, or 2) for use with an external blower. Both
versions include a gas and air valve, internally linked
together to control the gas-air ratio over the full
operating range. The gas flows through the nozzle,
then along the inside of the burner cone where
combustion air is progressively and tangentially mixed
with the gas. This produces a very wide turndown
range and a highly stable flame under a variety of
operating conditions.
10/92
Page 2106Model “400” OVENPAK® Gas Burners
Design and Application Details
Model “EB” (external blower) OVENPAK® Burners
(shown at right), like all OVENPAK® Burner assemblies, are designed to deliver heat through a patented
mixing cone and stainless steel sleeve.
Flanged burner body design on all OVENPAK
Burner assemblies simplifies mounting and installation on your application. Burner can be installed in
any position that does not conflict with your control
motor or flame detector requirements.
Minimal torque requirements permit use of most
electric or air operators in conjunction with the optional (Maxon supplied) connecting base and linkage
assemblies.
Model “EB-MA” OVENPAK® Burner with discharge sleeve
and optional manual gas control
®
view into
cone of
EB version
Model EB-3 OVENPAK® Burner arranged for external
blower source with connecting base and linkage assembly
to adapt customer's automatic control motor
“400-MA” and “EB-MA” versions
Model “400-MA” versions include a combustion air
blower in your choice of the voltages shown on page
2107, but provide constant combustion air volumes.
They differ from “standard” versions by use of a
slotted adjustable air butterfly locking device as
shown in photo at left. Internally, the linkage normally
cross-connecting air and gas butterflies is omitted.
In normal operation, the air butterfly is set to the
desired air differential pressure, and the fuel only is
throttled by a separate control valve. Maximumcapacities match those cataloged for “standard”
burners of equivalent size. Minimum capacities with
full air flow will be higher than those of “standard”
burner.
“EB-MRV” versions (photo at right)
“EB-MRV” versions of OVENPAK® Burners permit
air/fuel ratio control via a Maxon MICRO-RATIO®
control valve throughout the firing range. They differ
from standard “EB” burners in that internal gas and air
butterflies and the related shafts and linkages are
omitted.
In normal operation, air and fuel will be proportioned by an external Maxon MICRO-RATIO® Control
valve.
Maximum capacities match those cataloged for
“EB” burners of equivalent size and differential air
pressure. Minimum capacity and air differential
pressure will vary with your application.
Model “EB-MRV” OVENPAK® Burner with optional 12"
discharge sleeve
®
Gas Burners
Page 2107Model “400” OVENPAK
Capacities and Specifications – 60 Hertz
Standard Model “400” OVENPAK® Burner in-
cludes a combustion air blower with motor.
Maximum capacity of Model “400” OVENPAK
®
Burner is affected by the static pressure within the
combustion chamber. Data shown assumes firing in
the open, or into an airstream with enough oxygen to
complete the combustion process. If burner is fired into
an oxygen-starved chamber or airstream, capacities
may be reduced as much as 25-30%. Do not attempt
to operate beyond the duct static pressure range
shown. For higher back pressure applications, select
from Model “EB” or “EB-MRV” OVENPAK® Burner
options.
All gas pressures are differential pressures and
are measured at the gas pressure test connection on
the backplate of each OVENPAK
Burner is affected by the static
pressure within the combustion chamber.
Data shown assumes firing in the open, or
into an airstream with enough oxygen to
complete the combustion process. If burner
is fired into an oxygen-starved chamber or
airstream, capacities may be reduced as
much as 25-30%. Do not attempt to operate
beyond the duct static pressure range
shown. For higher back pressure applications, select from Model “EB” or “EB-MRV”
OVENPAK
®
Burner options.
All gas pressures are differential
pressures and are measured at the gas
pressure test connection on the backplate
of each OVENPAK® Burner. Differential
pressures shown are approximate.
Air filter assemblies help to trap airborne particu-
late matter. They are offered with washable replaceable
filter elements or with permanent metallic elements (as
shown in photograph above). Filters mount onto
OVENPAK
®
Burner's blower housing (or silencer
housing of burners so equipped) and surround the
blower motor and combustion air inlet.
dB(A) sound levels
from actual tests conducted at full-rated 60 Hz
capacity are shown in table
at right. Measurement point
is shown in sketch below.
(Meter was set to A-scale,
slow response.)
Operation on 50 Hz
power results in lower
rotational speed of blower,
and so reduces air output,
capacity, and resulting
noise levels. 50 Hz noise
levels should not exceed
the above data measured
on 60 Hz operation.
Burner
Model
405
407M
408M
408
412M
413M
415
422M
425
432M
435
442M
445
456M
470M
487M
Sound Level dB(A)
Standard
Burner
84
83
84
87
81
82
89
88
89
88
87
89
89
90
92
94
with
Silencer
75
77
75
78
73
72
77
79
78
80
78
80
81
83
83
85
Filter silencers help reduce noise levels. They
mount onto OVENPAK® Burner's blower housing and
enclose the blower motor and combustion air inlet (as
shown in above photograph). They can be furnished in
conjunction with a permanent or replaceable filter
element assembly described above.
6/96
Page 2114Model “400” OVENPAK® Gas Burners
Accessory Options
Universal Joint Arrangements (for all
versions except EB-MRV) allow control of as many as
5 burners by a single control motor. Torque requirement is 10 in-lbs for EACH burner driven. Primary
burner should drive no more than 2 Secondary burners
to either side of itself.
Miniature universal joints simplify burner alignment.
Aluminum connecting rod can be cut to fit actual
burner spacing. (
burner centerlines is 21" – 33" for 422M and smaller,
23.5" – 36" for larger burners.)
1. Primary and secondary burners
2. Any other accessories desired
3. Required quantity of Universal Joint Assemblies
Allowable distance between adjacent
To order, specify:
Auxiliary Switches
Maxon offers 4 types, all cam-actuated by the
burner main operating shaft. (If Universal Joint Arrangements are used, switch must mount on furthest
left burner.) Field installation MAY require burner
modification per instructions provided in Product
Information Sheet 2000-7/8.
Low Fire Start Switch Assembly (SPDT) opens
the circuit when burner leaves minimum position. Also
available in Weatherproof and Hazardous Location/
Weatherproof versions.
High and Low Fire Position Switch Assembly
includes 2 SPDT switches. One switch may be fieldset to activate at high fire position, while other is set to
activate at low fire position. Switch assemblies are
also available in a weatherproof version.
Manual Handle Kit permits setting and locking
air and fuel valves at a constant firing rate. See photo
below.
Low Fire Start Switch shown
Discharge Sleeve Mounting Gaskets
Standard discharge sleeve gasket provides
adequate sealing in most applications.
High Back Pressure Gasket Kit includes 2 additional gaskets to provide sealing against back pressures as shown in sketch below.
Standard
Arrangement
High Back Pressure Kit
With
Model “400” OVENPAK® Gas Burners
Accessory Options
Page 2115
Hi/Lo Control Motor Sets for high or low firing.
Optional set includes 2-position unidirectional 11second 120v 50/60 Hz motor and connecting base with
mounting linkage. See table below for dimensions
which differ from standard burner.
sehcnInisnoisnemiD
2,1-BEM314-504
3-BEM224-514
5,4-BEM244ot524
7,6-BEM784-544
ledoMrenruB
PRT
52.0136.7157.7
91.0165.7157.7
96.1160.9157.8
96.6160.4257.8
Discharge Sleeves are available in 3 versions:
– Standard sleeve is 8" long, made of #310 SS, and
is suitable for downstream temperatures up to
1000°F (538°C).
– For higher velocities, specify 12" long sleeve made
of #310 SS for downstream temperatures up to
1000°F (538°C).
– For higher downstream temperatures between
1000°F (538°C) and 1500°F (816°C), specify 8" long,
#RA 330 SS sleeve.
9/94
Page 2116Model “400” OVENPAK® Gas Burners
Dimensions (in Inches)
Model “400” and “400-MA” OVENPAK® Burners
NOTE: Use of auxiliary switches will add to dimension D.
Pipe threads on this page conform to NPT (ANSI Standard B2.1)
52.052.726.873.644.044.5
52.926.0178.8
73.0
65.0
-7.11
5
44.5
57.766
52.015.88
4
1/98
Page 2118Model “400” OVENPAK® Gas Burners
Accessory Dimensions(in Inches)
Filter with silencer for Model “400” OVENPAK® Burner
ledoMJJLLMMNNPPRRSSTTUU
504
M704
804
M804
M214
M314
514
M224
524
M234
534
M244
544
M654
M074
M784
4.414.21
7.121.519.128.77.424.131.53
4.414.213.914.012.329.926.33
7.121.519.128.77.424.131.53
4.414.213.914.01
7.121.51
2.025.413.8429.526.233.63
6.321.81229.428.019.429.135.833.24
52.025.41614.123.8429.526.233.63
6.32
5.326.82
9.522.02422.928.216.929.337.243.44
1.81229.428.01
61
3.914.01
9.12
2.329.926.33
2.32
8.77.424.131.53
1.32
9.42
2.329.926.33
9.135.833.24
Pipe threads on this page conform to NPT (ANSI Standard B2.1)
Component Identification
Page 2119Model “400” OVENPAK® Gas Burners
Suggested spare parts
– Spark Ignitor– Discharge Sleeve and Gasket
– Flame Rod, if used– Motor
– Filter Elements, if used– Impeller
– Mixing Cone– Gas/Air Valve Linkage Kit
To order parts for an existing OVENPAK® Burner assembly, list:
1. Name(s) of part(s) from above illustration
2. Quantity of each required
3. OVENPAK® Burner nameplate information:
• size and model number of burner
• assembly number
• date of manufacture
• if available, serial number of Maxon fuel shut-off valve in-line to OVENPAK
Burner (This serial number is on Maxon valve's nameplate.)
9/03
Nameplate
®
Page 2120Model “400” OVENPAK® Gas Burners
Suggested Maintenance/Inspection Procedures
Discharge sleeve and cone alignment
Centering of the mixing cone provides a small
annular opening for the flow of some cooling combustion air along the discharge sleeve wall. We SUGGEST
periodic inspection from the discharge side of the
burner to assure that this alignment is maintained.
Caution: Tightening can lead to cone distortion
and greatly reduce cone and discharge sleeve
life. Cone should be free to move and allow for
thermal expansion.
If re-adjustment is necessary, back out the four lock
nuts and re-center mixing cone with adjusting screws
handtight. Back each screw out one-half turn before relocking. This allows for thermal expansion as cone
gets hot.
Filters should be inspected regularly and cleaned,
using a vacuum to remove loose/dry accumulations,
then washing and/or degreasing as appropriate for the
filter type used.
To replace flame rod or spark ignitor:
1. Check Table 1 at right for dimension “Y” and cut tip
to length shown.
2. Insert 1/2" NPT collar into burner and snug into
position.
3. Insert insulator through collar into burner.
4. Check table for dimension “X”, position accordingly,
and tighten locking bushing until insulator is held
firmly.
WARNING: Over-tightening locking bushing may
damage insulator.
NOTE: A full-wave 6000 volt spark ignition transformer
is suggested for use with Maxon burner equipment.
Flame Rod
NOTE: 1/2" x 1" adapter bushing supplied by others
Table 1: Flame rod and spark ignitor dimensions
for all Model “400” OVENPAK® Burners
manufactured after 1/1/91 ①
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ledoMrenruB
XYXYZ
504
M704
1-BE
2-BE
3-BE
4-BE
5-BE
6-BE
7-BE
M804
804
M214
M314
514
M224
524
M234
534
M244
544
M654
M074
M784
3.14.
5.14.
2.14.8.8.015.3
3.14.4.8.219.2
snoisnemiD
4.69.2
doRemalF
snoisnemiD
①
Manufactured date is stamped on metal nameplate
of Model “400” OVENPAK® Burner. For specifics
relative to units manufactured prior to 1/1/91, see
Product Information Sheet 2100-3.
Page 2121Model “400” OVENPAK® Gas Burners
Maxon Pre-Assembled P acka ge
Model “400” OVENP AK® Gas Burner System
Save time and reduce your installation costs with a
completely assembled and pre-wired burner and pipe
train “package”.
All system components have been carefully selected to match the high performance characteristics of
the Model “400” OVENPAK® Gas Burner.
The compact design of this “packaged system”
makes mounting to your duct fast and easy. Connect
to the gas line and bring in electricity. It's wired and
piped, ready to go.
425 OVENPAK
package system
installed and
mounted onto a
Maxon
pre-fabricated
heater/duct section
All pre-assembled package systems include a
Model “400” OVENPAK® Burner and pipe train. The
pipe trains are available with “Block and Bleed” arrangement options only.
Additional application flexibility is provided with five
different sized systems, all with 40:1 turndown
capacity ranges.
Packaged OVENPAK® Burner systems may also be
mounted in a pre-fabricated combustion heater/duct
section by Maxon. This option is value-engineered to
give you the most for your dollar spent.
®
6/03
Page 2122Model “400” OVENPAK
Design / Application Summary
Five Model "400" OVENPAK® pre-assembled package options:
®
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®
Gas Burners
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Pre-assembled pipe train “package”
includesthe following components:
– Burner gas shut-off cock
– Main inlet gas shut-off cock
– Pilot gas train consisting of:
• Pilot gas shut-off cock
• Pilot gas pressure regulator (maximum 1 PSIG
natural gas inlet pressure)
• Pilot gas solenoid valve, 115/60VAC
– Main gas pressure regulator (maximum 1 PSIG
natural gas inlet pressure)
– Combustion air pressure switch, automatic reset,
NEMA 1, 115/60VAC
– Combination high and low gas pressure switch,
manual reset, NEMA 1, 115/60VAC
– Spark ignition transformer, 6000 volts, NEMA 1, 115/
60VAC
– NEMA type 12 and 13 junction box with terminal
wiring strip
– Normally open vent solenoid valve, 115/60VAC
A complete packaged system also includes:
• Maxon Model “400” OVENPAK® Burner assembly
– Connecting base and linkage assembly to adapt
customer-supplied automatic control motor
(optional)
– Low fire start switch (mounted to OVENPAK
Burner)
– Air filter assembly
• Maxon main gas shut-off valve, position “L”, 115/
60VAC
• Maxon main gas “blocking” shut-off valve, position
“L”, 115/60VAC00000000
®
Factory pre-wiring includes the following
components for 115 volts 60 hertz AC:
– Low fire start switch
– Combustion air pressure switch
– Combination high and low gas pressure switch
– Pilot gas solenoid valve
– Normally-open vent solenoid valve (when used)
– Spark ignition transformer
– Maxon “main” and/or “blocking” gas shut-off valve(s)
– NEMA type 12 and 13 junction box with terminal
wiring strip
Field wiring is required:
– To the packaged system's junction box wiring strip
– To the Model “400” OVENPAK® Burner's combustion
air blower motor
– Between your flame safeguard relay and the
OVENPAK® Burner's flame sensor
NOTE: A flame rod may be furnished by Maxon; UV
detector is a part of the control package when
supplied by Maxon or may be supplied by others.
– Other field wiring connections may be required if your
control circuit includes high/low temperature limits,
automatic temperature controller, and/or other
miscellaneous safety limit switches.
®
Gas Burners
Page 2123Model “400” OVENPAK
Maxon Packaged Heater/Duct Sections
Reduce your fabrication time with a complete
combustion heater/duct including the prewired and
prepiped Model “400” OVENPAK® Burner system
package.
Easy installation is provided by flanged duct
connection joints. Burner is mounted to a .312" mild
steel wall, lined with 6" thick fiber insulation. The other
16 gauge aluminized steel heater/duct walls are ready
for your insulation.
Application flexibility is offered by three sizes of
ducts. All sizes can be fabricated to have return/inlet
opening at any 90° increment position (viewing from
the back of the OVENPAK
®
Burner). Continuous welds
on all joint seals permit duct section installation on
pressure-side or suction-side applications.
6/03
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514
534-524
2142501638426.2126.625.773
5103621240626.4126.235.984
8163861842726.8126.835.1185
Page 2124Model “400” OVENPAK
®
Gas Burners
Maxon Packaged Heater/Duct Sections
Design and Application Details
Maximum discharge temperature 600°F (316°C)
Duct static pressures may range between +2" wc and -5" wc
Optimum design parameters permit up to 3000 feet per minute air velocity through return/inlet duct.
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®
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To select your packaged system, specify:
1. Quantity ________
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2. Model “400” OVENPAK
– Arrangedfor UV detector, orwith flame rod
– Furnished with blower motor for ___________ AC
–With low fire start switch _________ , General Purpose, 115/60 AC
–With combustion air filter assembly ____________ (optional)
–With connecting base and linkage assembly ____________ to adapt customer's automatic electric
control motor. Specify/select which one of these electric operators will be used:
–Barber-Colman #EA51–58, also with prefix MC, MP or MF
–Honeywell #M644, #M744, #M941, or #M944
–Penn/Johnson #M-80 or #M81
3. Arranged into pre-assembled and wired pipe train package, 115/60VAC,
–With Block and Bleed arrangement assembly ______________.
4. With _______1-1/4" or1-1/2" Maxon Series __________Automatic Reset,Manual Reset
Shut-Off Valve(s), for natural gas, in top assembly position “L” for 115/60VAC
–With electrical terminal block (option)
–With6 second, or2.5 second opening time (automatic reset valve(s) only)
–With ______________ auxiliary signal switch(es) (optional)
NOTE: Specify which switch(es) go in main valve and which switch(es) in blocking valve, if different.
with return/inlet duct positioned ontop,right, bottom, orleft
®
Gas Burners
Page 2125Model “200” OVENPAK
Model “200” OVENPAK
®
Burners
Model “200” OVENPAK® Gas Burners
provide a broad range of heat without a
combustion blower by firing through-the-wall
into your combustion chamber on the suction
side of the circulating fan. An internal mixing
cone blends air drawn through the burner (by
chamber suction) with fuel gas delivered
through its central gas nozzle. The Model
“200” OVENPAK
® Burner is designed for
applications involving suction-side firing from -
0.2" to -1.6" wc static chamber conditions.
They provide:
– low initial and operating cost
Model “200” OVENPAK
Burner arranged with air inlet
guard and optional UV scanner
®
– easy installation
– simple adjustment
– heavy duty cast iron construction in a
compact burner configuration
Performance data
NOTE: Maximum capacity varies with the range of suction provided at operating temperature
Air volumes shown are for burners without damper,
or with damper in full-open position. If damper is used
to restrict air flow, maximum capacity will be similarly
reduced.
Pilot flame issues from the same gas ports as
main flame, so proof of pilot gas ignition assures
ignition of main gas supply.
Flame sensing can be either by flame rod or UV
scanner when natural gas is the fuel, but only with UV
scanner if propane is the fuel.
Installation is simple, utilizing the built-in, directmounting flange provided.
A complete combustion system utilizing Model
“200” OVENPAK® Burners also includes gas train,
fuel-throttling valve and control system. Your Maxon
representative can help you choose from the broad
range of options available.
(" wc) for both natural gas and propane are those that
should be measured by connecting a manometer
between test points shown in the photo below.
Model “208” OVENPAK® Burner shown with air damper
and flame rod
Suction (shown in inches wc) should be that
available at operating temperature. It can be determined by a two-step procedure: First, measure cold
suction (chamber to atmosphere). Second, multiply
that reading by the correction factor shown in Graph
"A" for your desired operating temperature.
For example, if you anticipate running the system at 600°F,
follow that dotted line to the right until it intersects curve,
then read downward to a correction factor of 0.5. Therefore,
if you read a cold suction of 1" wc, your expected suction
“at temperature” would be 1" x 0.5 = 0.5" wc.
Dimensions(in inches)
Burner
Assembly
Flame Rod Assembly
Installation Instructions
Page 2100-S-1“400”, “200” OVENPAK® Burners
General Instructions
Important: Do not discard packing material until
all loose items are accounted for.
To prevent damage in transit, the spark ignitor,
discharge sleeve, mounting gaskets, flame rod and
connecting linkage components may be packed
separately and shipped loose with your new Maxon
OVENPAK® Burner.
The burner itself is normally only a part of your
complete combustion system. Additional pipe train
accessories and control components will be required
for a complete system installation. The sketch below
shows a typical gas train as might be used with
OVENPAK® gas fired burners.
Piping Layout as sometimes required by
insurance and standards groups
Block and Bleed gas train arrangement illustrated
with Model “400” OVENPAK
Model “400” OVENPAK
supply (except for EB versions, which require a
separate combustion air blower). They also serve as
a fuel flow control and fuel/air mixing device. Model
“200” OVENPAK® Burners serve as a mixing device
and usually have an externally-mounted gas control
valve.
Burner should not be exposed to direct radiant
heat or positioned where it might draw in inert gases.
If such conditions exist, consider filters, relocation
and/or use of the EB version and external air supply.
Electrical service must match the voltage, phase
and cycle of all electrical system components and be
®
Burner
®
Burners provide the air
compatible with burner nameplate ratings. Insure that
all normal control safeguards are satisfied. Combustion air blower should continue to run after shutdown
to allow burner to cool.
Gas supply piping must be large enough to
maintain the required fuel pressures cataloged for the
particular burner size used with burner operating at
full rated capacity.
Anything more than minimal distance or piping
turns may necessitate oversizing piping runs to keep
pressure drops within acceptable ranges.
Inlet pipe leading to any burner should be at least
four pipe diameters in length. If multiple burners are
fed from a single gas train, care should be taken to
minimize pressure drop and give maximum uniformity.
Clean fuel lines are essential to prevent blockage
of pipe train components or burner gas ports.
Main Shut-Off Cock should be upstream of both
the main gas regulator and pilot line take-off. Use it to
shut off fuel to both pilot and main burner during shutdown periods of more than a few hours.
The fuel throttling valve contained within a Maxon
burner is not intended for tight shut-off.
Main gas regulator is essential to maintain a
uniform system supply pressure. If one pipe train
supplies multiple burners, provide a separate regulator in the branch leading to each burner system.
Size the regulator for full system capacity at the
required pressure, carefully considering pipe train
losses. Follow the instructions attached to the regulator during installation and be sure to remove any
shipping pin or block.
Pilot take-off should be upstream of the main gas
regulator, but downstream of the main gas cock. It
should normally include its own pilot gas regulator, a
solenoid valve and shut-off cock. A pilot adjustable
orifice at the pilot inlet simplifies adjustment.
Pilot piping must be large enough to provide for
the full flow and pressures shown in the catalog for
your particular burner size.
Fuel Shut-Off Valves (when properly connected to
a control system) shut the fuel supply off when a
hazardous operating condition is sensed. Manual
reset valves require operator attendance each time
the system is started up (or restarted after a trip-out).
Motorized shut-off valves permit automatic startrestart when used with an appropriate control system.
Test connections are essential for burner adjustment. They should be provided immediately downstream of the regulator and are included in the burner
itself. Test connections must be plugged except
when readings are being taken.
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
4/98
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
m
CORPORATION
MUNCIE, INDIANA, USA
Page 2100-S-2
“400”, “200” OVENPAK® Burners
Installation Instructions
Horizontal mounting is preferred, but burner may
be mounted in any position suitable for automatic
control motor and UV scanner (if used).
OVENPAK
through an oven wall or insulated air duct. Cut opening approximately 1" larger in diameter than discharge
sleeve to allow for thermal expansion of sleeve.
Burner mounting requires four studs and a flat
mounting surface perfectly centered on the discharge
sleeve.
After placing burner in position over studs, add lock
washers and nuts, then draw up hand-tight only.
Check that burner is seated evenly all around the
flange, filling any gaps to prevent air leakage, then
tighten all nuts firmly.
For proper performance of any burner, air inlet and
motor should be surrounded by clean, fresh, cool air.
Burner and pipe manifold support will be required to support weight of the burner and connected
pipe train components. Air control motors, in particular, require additional support. Maxon connecting
base and linkage assemblies are designed to position
the control motors to work with the burner, not to
support their weight.
The Packaged Model “400” OVENPAK
requires external auxiliary support provided by the
user. The support configuration may be similar to the
leg support or knee bracket support illustrated below.
®
Burners will typically be installed
®
Burner
Additional burner support may be required in
conjunction with a stiffener plate when mounting
OVENPAK® Burner (weighing 100-350 pounds)
through typical thin wall of heater/oven panels.
For push-through systems, use Maxon special
back pressure gasket between stiffener plate and
discharge sleeve flange and use (2) ring gaskets
between discharge sleeve flange and burner casting
to prevent back flow of high temperature air. Fill area
D (see sketch below) with no more than 2" of high
temperature packing (too little will overheat mounting;
too much will overheat sleeve).
Typical discharge sleeve mounting
recommendations
“400”
OVENPAK
Burners
®
Suggested supporting arrangements for
Packaged Model “400” OVENPAK
®
Burners:
For pull-through systems, spacers may be
installed on stud bolts and area D left empty to admit
cooling air past the sleeve.
WARNING: Welding of burner flange to stiffener
plate may cause warpage of burner flange and
require additional seal material to prevent
leakage.
Four lock screws permit centering of mixing cone
within burner body and sleeve.
m
CORPORATION
MUNCIE, INDIANA, USA
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
“400”, “200” OVENPAK® Burners
Installation Instructions
Page 2100-S-3
For “400” OVENPAK® Burners: Lock screws
should be drawn up hand-tight, then backed out onehalf turn to allow for cone expansion. They must bere-checked after start-up, and loosened if necessary
to prevent deformation of cone. See start-up instructions for details. Over-tightening lock screws can
lead to cone distortion and greatly reduce cone
and discharge sleeve life.
Discharge sleeve must be flush with, or extend
beyond, interior wall. Maxon can supply a special 12"
long discharge sleeve, but higher noise levels may
result, particularly when firing on propane.
An external viewing port should be provided for
flame observation, preferably in such a position that
burner pilot and main flame can both be seen.
Flame sensing can be accomplished by either
flame rod or UV scanner. When UV scanner is used,
it should be kept as close to burner as feasible. Heat
block, if used, may affect signal strength with some
brands of scanners.
For “400” OVENPAK® Burners, field conversion
from a flame rod version to a UV scanner version and
vice versa may require additional parts in the burner.
Contact Maxon for requirements.
Alternate fuels may require correction of supply
pressures.
If OVENPAK® Burner is equipped with Maxon Hi/Lo
Control Motor, low-fire start wiring can be accomplished as shown in the sketch below.
Maxon assumes no responsibility for the use or
misuse of the layouts shown. Specific piping
and wiring diagrams should always be submitted to the appropriate agencies for approval on
each application.
Multi-burner installations require special consid-
erations if supplied by a common pipe train and/or air
supply. Air and Gas Balancing Valves should be
used for improved heating uniformity; Gas Swing-Check Valves should be installed as close as possible to each burner inlet for dependable lightoff (gas
manifold may otherwise act as a reservoir, preventing
lightoff during trial-for-ignition period).
Control system’s circuitry must not allow main
Fuel Shut-Off Valve to be opened unless combustion
air is on, and must de-energize valve upon loss of
combustion air pressure, along with the other usual
system interlocks. Motor starter is to be interlocked
with valve, whether or not a combustion air pressure
switch is used.
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
4/98
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
m
CORPORATION
MUNCIE, INDIANA, USA
Page 2100-S-4
“400”, “200” OVENPAK® Burners
Start-Up Instructions
Read complete instructions before proceeding,
and familiarize yourself with all the system's equipment components. Verify that your equipment has
been installed in accordance with the original manufacturer's current instructions.
CAUTION: Initial adjustment and light-off
should be undertaken only by trained and
experienced personnel familiar with combustion systems, with control/safety circuitry, and
with knowledge of the overall installation.
Instructions provided by the company and/or
individuals responsible for the manufacture
and/or overall installation of complete system
incorporating Maxon burners take precedence
over these provided by Maxon. If Maxon
instructions conflict with any codes or regulations, contact Maxon Corporation before
attempting start-up.
For initial OVENPAK
1. Close all burner fuel valves and cocks. Make
preliminary adjustments to fuel gas regulators.
Remove pilot and main gas regulator’s adjusting
screw covers. Turn adjusting screw down (clockwise) to approximately mid-position. Close pilot
gas adjustable orifice screw by turning in clockwise until it stops. (Do not over-tighten.) Then
back out the adjustable orifice (counter-clockwise)
approximately 2-3 turns.
2. Check all electric circuitry. Verify that all control
devices and interlocks are operable and functioning within their respective settings/ranges. Be
sure all air and gas manifolds are tight and that
test ports are plugged if not being used.
3. Check that all duct and chamber dampers areproperly positioned and locked into operating
positions.
4. Disconnect the automatic control motor’slinkage from the “400” OVENPAK
operating crank arm by loosening the control
motor’s connecting rod from the burner’s toggle
linkage.
®
Burner start-up:
®
Burner’s
For Model EB-MRV and Model “200”
OVENPAK® Burners, the connecting linkage on
the separate control valve must be similarly
loosened and disconnected. Refer to specific
adjusting procedures relating to control valve
adjustment in Maxon catalog.
Initial start-up adjustment should only be
accomplished during a manual burner control
mode.
5. Start all system-related fans and blowers.
Check for proper motor rotation and impeller
direction. Verify that all control interlocks are
working. Allow air handling equipment to run for
adequate purge of your manifolds and combustion chamber plenums. With main gas shut off,
manually advance burner to high fire position so
that air only flows through burner and combustion
chamber.
CAUTION: Do not by-pass control panel timers
typically controlling sequential operations.
For EB OVENPAK® Burners only (step 6)
6. Verify differential air pressure. With combustion
air blower on, all volume air fans operating, and
burner at high fire position, connect a manometer
between the air test connection on backplate of
OVENPAK® Burner and your combustion chamber
static pressure test connection. This will give a
direct differential air pressure reading.
m
CORPORATION
MUNCIE, INDIANA, USA
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
“400”, “200” OVENPAK® Burner
Start-Up Instructions
Page 2100-S-5
Determine your differential air pressure reading
by taking an additional reading with manometer
connected between the burner’s air pressure test
port and atmosphere with the burner at high fire
position, fuel valves closed, and all air handling
systems running. Subtract the combustion
chamber static pressure obtained above from this
air pressure reading to give you differential air
pressure reading.
For Model “200” OVENPAK® Burner only
(steps 6A-6C)
6A. Cross-connect manometer to upstream ① and
downstream ② air pressure test connections on
Model “200” OVENPAK® Burner’s main housing.
6B. Start air handling system and adjust louvers,
dampers, etc. to desired setting to establish cold
suction design conditions.
6C. Transfer manometer connection from upstream
air pressure test ① to gas pressure test connection
③. This is the differential air pressure reading for a
Model “200” OVENPAK® Burner.
For “400” OVENPAK® Burners: The differential air
pressure setting determines the burner’s capacity and
performance capabilities. Model EB and MA manual
air OVENPAK® Burners, with their external air control
valve(s), provide for the manual setting of this differential air pressure to the burner. Refer to specific
adjusting procedures relating to MICRO-RATIO® and
control valve adjustment in Maxon product line
catalog. MA OVENPAK
locknut adjustment on the end of the air butterfly
®
Burners have an external
control valve. This lets you limit and set the differential
pressure to the OVENPAK
specification tables in the catalog for the differential
air settings required for your specific OVENPAK
Burner capacity.
7. Determine the required differential gas pres-sure using this differential air pressure reading
obtained from step 6. If your combustion chamber
does not have a static pressure test connection,
then you must measure combustion chamber
static pressure by connecting a manometer
between the gas pressure test port on the
burner’s backplate and to atmosphere with the
burner at low fire position, fuel valves closed, and
all air handling systems running. High fire pressures are provided in Maxon product line catalog
literature and/or read data stamped into burner
nameplate.
8. Verify that spark ignitor is properly positioned
and lines up with the appropriate dimensions
required for your specific burner. (Refer to appropriate Maxon catalog specification table.) Check
that spark ignitor arcs at the end of your properly
positioned ignitor.
9. Return burner control valve (or crank) to lowfire position when purge of system is complete.
10. Open main and pilot gas cocks, then attempt
spark ignition to light pilot while slowly turning
pilot gas regulator spring clockwise and/or
adjustable orifice screw counter-clockwise to
increase fuel flow. Repeat procedure as necessary until pilot ignites as air might have to be bled
out of fuel supply lines before reliable pilot flame
is established. Pilot gas regulator should normally
be set for as low a pressure as possible, using
fuller opening of pilot gas adjustable orifice (if
used).
11. After ignition, adjust pilot flame for good stable
flame shape. A rule of thumb is that any pilot over
a tennis ball size is probably too large. This
assumes you have visual access to the pilot
flame. If this is not possible, then adjust pilot to
give the strongest and most stable flame signal
through your flame safety circuit. This signal
strength can be read with a micro-amp meter. The
signal strength (or range) will be determined by
the specific type of flame safeguard instrument
you have with your burner system.
®
Burner. Refer to Maxon
®
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
4/98
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
m
CORPORATION
MUNCIE, INDIANA, USA
Page 2100-S-6
“400”, “200” OVENPAK® Burners
Start-Up Instructions
12. Re-check pilot ignition by closing pilot gas cock
or otherwise causing pilot outage. Re-light and
refine pilot gas adjustment as necessary to get
ignition within a second or two. The flame safeguard relays should now power your main fuel
Shut-Off Valve(s).
CAUTION: After completing steps above, recheck all interlocking safety components and
circuitry to prove that they are properly installed, correctly set, and fully operational. If in
doubt, shut the system down, close pilot cock
and contact responsible individual before
proceeding further.
13. Establish main flame. With burner at low fire
position, back out main gas pressure regulator
adjusting screw (counter-clockwise) to get lowest
outlet pressure possible. Open all manual fuel
shut-off valves (automatic fuel shut-off valve
should already be open) so gas flows to burner
inlet. There should be little, if any, change in
flame appearance. Turn main regulator adjust-ing screw in (clockwise) to obtain outlet pressure
of about 4"-6" wc higher than combustion chamber pressure (2"-4" wc for propane, considerably
higher for some EB versions). Main flame should
now appear larger than pilot-only flame.
14. Establish high fire setting by slowly moving
burner toward high fire position while observing
gas pressure at burner gas test connection.
Refine main gas regulator adjustment as necessary to provide correct differential pressure
(gauge to combustion chamber, see step 7) at
high fire. If pressure cannot be adjusted low
enough, a different regulator or regulator spring
may be necessary, or a limiting orifice valve (such
as Maxon's Series “BV”) should be added. Do
not, however, exceed 4" wc pressure drop
between regulator outlet and burner inlet.
CAUTION: If burner(s) go out, close shut-off
valve or shut main gas cock at once. Return to
minimum setting, re-light pilots if necessary,
then turn main gas on again. Check carefully
that every burner is lit before proceeding.
Cycle burner from minimum to maximum
and refine adjustment, if necessary.
For operation with interrupted pilot (as
recommended), shut off pilots and cycle burner
from minimum to maximum and back several
times to verify the flame is maintained.
15. When burner performance is satisfactory and
stable throughout the firing range, reconnect
control motor.
For “400” OVENPAK® Burners: Reconnect
linkage to control motor. Control linkage travel
must be such that burner crank is moved throughout its complete travel, or cataloged capacities
and turndowns will not be achieved. If less than
full-rated burner capacity is required, linkage can
be adjusted to limit maximum output.
With interrupted pilot, it may be necessary to
set control for somewhat higher than minimum
burner setting to permit hold-in of flame detection
system without pilot.
CAUTION: Internal drive mechanism within the
control motor may be damaged if linkage is
adjusted so as to cause binding with burner in
high or low fire position.
16. Re-check differential gas pressure with unit at
operating temperature. Refine high fire setting if
necessary, considering differential pressure,
flame length, and appearance. Natural gas flame
should normally be predominantly clear blue but
possibly with semi-luminous tips. Dust or contaminants in the air stream may affect flame appearance.
17. For “400” OVENPAK
contact between mixing cone and top-most
centering screw after system has reached
maximum operating temperature. If set screw
touches cone, back off an additional 1/8 turn on
top and both side set screws.
18. Plug all test connections not in use to avoiddangerous fuel leakage. Replace equipment
cover caps and tighten linkage screws.
®
Burners: Check for
m
CORPORATION
MUNCIE, INDIANA, USA
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
Start-Up Instructions
Page 2100-S-7“400”, “200” OVENPAK® Burners
19. Check out overall system operation by cycling
through light-off at minimum, interrupting pilot,
and allowing temperature control system to cycle
burner from minimum to maximum and return.
Recheck all safety system interlocks for proper
setting and operation.
NOTE: Typical gas firing control sequence for Maxon
burner is provided
provided by complete system manufacturer incorporating Maxon burners take precedence.
5. Purge at least 4 air changesafter shut-down long
6. Open pilot & main gas cocksenough to allow
only as a guide. Instructions
®
Burner
burner to cool
WARNING: Test every UV installation for
dangerous spark excitation from ignitors and
other possible sources of direct or reflected UV
radiation. Use only gas-tight scanner
connections.
20. Before system is placed into full service,
instruct operator personnel on proper start-up
operation with shut-down of system, establishing
written instructions for their future reference.
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
4/98
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
m
CORPORATION
MUNCIE, INDIANA, USA
Page 2100-S-8
“400”, “200” OVENPAK® Burners
Notes
m
CORPORATION
MUNCIE, INDIANA, USA
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
Model “400” OVENPAK® BurnersPage 2100-A/P-1
Assembly Numbers
For these products, please order per the following product numbers:
(configured products are those with alphanumeric text)
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
m
CORPORATION
MUNCIE, INDIANA, USA
®
Page 2100-A/P-16
Model “200” OVENPAK
Burners
Assembly Numbers
Maxon Pre-Assembled Model “400” OVENPAK® Gas Burner Systems
Pre-assembled pipe train package includes all components for natural gas
• Burner gas shut-off cock
• Main inlet gas shut-off cock
• Pilot gas train consisting of:
– Pilot gas shut-off cock
– Pilot gas pressure regulator
– Pilot gas solenoid valve –
• Main gas pressure regulator
• Combustion air pressure switch – automatic reset, NEMA 1,
• Combination high and low gas pressure switch – manual reset, NEMA 1,
• Spark ignition transformer – 5000 volts, NEMA 1,
• NEMA 12 & 13 junction box with terminal wiring strip
• Normally open vent solenoid valve –
• Maxon Model “400” OVENPAK
• Maxon main gas shut-off valve – position “L”,
• Maxon main gas blocking shut-off valve – position “L”,
115/60v AC
115/60v AC
®
Burner assembly
115/60v AC
115/60v AC
(Block and Bleed arrangements only)
115/60v AC
115/60v AC
(Block and Bleed arrangements only)
or propane gas
115/60v AC
:
To order:
– Select appropriate Model “400” OVENPAK® Burner system from below
– Configure system (which includes the burner and valve(s) – refer to catalog page 2124)
For burner CB & L’s:
(1) Specify from Honeywell: WITH #7616BR crank arm
(2) Specify from Penn/Johnson: WITH #LVR27A-601 crank arm
®
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Segment choices are as follows for
• Fuel
• Low pressure gauge kit
• High pressure gauge kit
• Duct section
BBLH504BBLH804BBLHAM804BBLH514BBLH524BBLH534
configured
products:
m
CORPORATION
MUNCIE, INDIANA, USA
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
Model “400” OVENPAK® Burners
Assembly Numbers
Model “200” OVENPAK® Burners
To order this configured product, enter: 208OP
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Approximate net weight (in pounds) shown in
parentheses
73682
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84582
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62103
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75712
Page 2100-A/P-17
7/03
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
INDUSTRIAL COMBUSTION EQUIPMENT AND VALVES
m
CORPORATION
MUNCIE, INDIANA, USA
Maxon
Product Information Sheet
Product: Model “EB” OVENPAK® Burners
Maxon Corporation, PO Box 2068, Muncie, IN 47307-0068. Phone (765) 284-3304. FAX (765) 286-8394.
Page: 2100-1
Date: 10/92
Component Identification
Suggested spare parts
– Spark Ignitor
– Flame Rod, if used
– Gas/Air Valve Linkage Kit
– Mixing Cone
– Discharge Sleeve and Gasket
To order parts for an existing OVENPAK
Burner assembly, list:
1. Name(s) of part(s) from above illustration
2. Quantity of each required
3. OVENPAK® Burner nameplate information:
• size and model number of burner
• assembly number
• date of manufacture
• if available, serial number of Maxon fuel
shut-off valve in-line to OVENPAK® Burner
(This serial number is on Maxon valve’s
nameplate.)
Maxon practices a policy of continuous product improvement. It reserves the right to alter specifications without prior notice.
®
Product Data Sheet
(for Maxon Personnel only)
Model “400” OVENPAK
®
Gas Burner Nozzle Drillings
Product: Model “400” OVENPAK® Burners
Page: 2100-1 Date: 3/98
Do Not Reproduce
– Each nozzle has eight gas ports drilled per chart
below.
– Each packaged OVENPAK® Burner assembly
includes standard (natural gas) nozzle.
– For propane firing: LESS natural gas nozzle, and
increases gas pressure required with
propane to the same as pressures required for natural gas.
– K Factor for orifice is 0.77
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“Normal” Maximum Combustion Air Pressures (at back plate air pressure test connection)
When firing against positive pressures, combustion
air readings will be higher, with the increase depending upon specific burner size and chamber pressure.