TPS BLUE M ESP400 Manual

BLUE M
Model ESP400 Industrial Oven Page 1
INDUSTRIAL OVEN
OPERATION & MAINTENANCE MANUAL
Model No. ESP400
Serial No. xxxxxxxxxx, O/N xxxxx
Controller: Partlow 1160+
OVEN OPTIONS
Process Timer - Eagle Signal B856 24 Hr. / 7 Day Timer - Grasslin FM1D
Chart Recorder Alternate Controller – Partlow 1166
2821 Old Route 15
New Columbia, PA 17856
570-538-7200 Fax: [phone]
Rev. 02/05/10

BLUE M
Model ESP400 Industrial Oven Page 2
SECTION Page
INFORMATION
1.0 COMPANY INFORMATION & ASSISTANCE ____________________________________ 4
2.0 SAFETY WARNINGS & SYMBOLS ___________________________________________ 5,6
3.0 PRODUCT SPECIFICATIONS & OVERVIEW
3.1 Application _______________________________________________________________ 7
3.2 Specifications ____________________________________________________________ 7
3.3 Conditioning Functions _____________________________________________________ 8
3.4 Equipment and Control Features _____________________________________________ 8,9
3.5 Operating Parameters and Requirements _______________________________________ 9
4.0 DRAWINGS, INFORMATION, and VENDOR INSTRUCTION LISTINGS ______________ 10
5.0 INSTALLATION INSTRUCTIONS
5.1 Delivery and Uncrating of Unit ________________________________________________ 11
5.2 Location and Installation of Unit ______________________________________________ 11
5.3 Equipment Access & Features _______________________________________________ 12,13
5.4 Exhaust Connection _______________________________________________________ 14
5.5 Power Supply Specifications and Connection ____________________________________ 15,16
5.6 Application of Power _______________________________________________________ 16
SYSTEMS and CONTROL
6.0 AIR CIRCULATION SYSTEM ________________________________________________ 17-21
7.0 ELECTRIC HEATING SYSTEM & CONTROL ___________________________________ 22
8.0 TEMPERATURE CONTROL – Partlow 1160+ Controller
8.1 Controller Features ________________________________________________________ 23
8.2 Temperature Control _______________________________________________________ 24
8.3 Controller Parameter Setup __________________________________________________ 24
9.0 ALTERNATE TEMPERATURE CONTROLLER – Partlow 1166
9.1 Controller Features ________________________________________________________ 25
9.2 Temperature Control _______________________________________________________ 25
9.3 Controller Parameter Setup __________________________________________________ 25
TABLE OF CONTENTS

BLUE M
Model ESP400 Industrial Oven Page 3
10.0 OVERTEMPERATURE PROTECTION – Partlow 1161+ Controller ___________________ 26
OPTIONAL EQUIPMENT & FEATURES
11.0 PROCESS TIMER – EAGLE SIGNAL B856 - Optional _____________________________ 27
12.0 24 HR / 7 DAY TIMER – GRASSLIN FM1D - Optional _____________________________ 28
13.0 CHART RECORDER - Optional ______________________________________________ 29
CHAMBER OPERATION & MAINTENANCE
14.0 SEQUENCE of OPERATION ________________________________________________ 30,31
15.0 PREVENTATIVE MAINTENANCE ____________________________________________ 32
15.1 Maintenance Checks / Procedures ____________________________________________ 32-34
15.2 Preventative Maintenance Schedule / Log ______________________________________ 35
SUPPLEMENTAL INSTRUCTIONS

BLUE M
Model ESP400 Industrial Oven Page 4
Congratulations on purchasing a chamber from one of the fine divisions of TPS - Thermal Product Solutions.
You probably already know us as Lunaire Limited. We’ve changed our name and expanded our vision with
the intent to provide you with more diversified solutions to your thermal product process requirements.
We truly hope that every aspect of chamber design and quality will measure up to your strictest standards.
Your chamber has been designed to operate with the reliability you expect for the demands you impose on
your product and research testing.
Headquartered in New Columbia, Pennsylvania, which is located in the North-central part of the state, TPS
includes the following five divisions that manufacture environmental test chambers and industrial ovens.
Tenney Environmental - - - - Lunaire Environmental - - - - Gruenberg Oven - - - - Blue M - - - - Lindberg
Parts and service inquiries for equipment within each division should be directed to TPS by any of the
following methods.
Important! Please have the Model and Serial Numbers of your unit available when contacting us.
Model No. Serial No.
Thermal Product Solutions
PO Box 150
White Deer, PA 17887
Thermal Product Solutions
2821 Old Route 15
New Columbia, PA 17856
Phone: 570 - 538 - 7200
Fax - Parts Dept. 570 - 538 - 7385
Fax - Service Dept. 570 - 538 - 7391
Fax - Main: 570 - 538 - 7380
E - Mail Address: [email protected]
Web site: www.thermalproductsolutions.com
Parts Replacement
Your equipment has been designed and manufactured to provide years of reliable service. In the event a
component should fail, it is recommended that only OEM approved parts be used as replacements. Please
contact the Parts Department for component replacement, or repair.
1.0 COMPANY INFORMATION & ASSISTANCE
Mailing Address
Physical Address
STANDARD UNITS
ARE AVAILABLE TO
SHIP WITHIN 10 DAYS
OF ORDER RECEIPT

BLUE M
Model ESP400 Industrial Oven Page 5
You must follow these and all Warning statements listed throughout the manual!
1. Read this entire Operation Manual, as well as the vendor manuals and cut-sheets provided before
operating this equipment! Failure to adhere to any Safety Warning, or failure to follow the proper
operating procedures listed throughout any of the information provided, could cause damage to your
equipment, personal injury, or death.
2. Obey all “CAUTION”, “DANGER”, and “WARNING” signs / labels mounted on the equipment. Do not
remove any of these signs / labels.
3. Do not use this equipment in any manner not specified in this manual. Improper use may impair the
safety features employed and will void your warranty.
4. This equipment is NOT designed for use with volatile or explosive materials unless specifically
stated in your purchase order. Loading of such materials may result in explosion or fire.
5. Operators and service personnel must be familiar with the location and function of all controls and the
inherent dangers of the equipment before operating or maintaining it.
6. Only qualified service personnel should ever be permitted to perform any service-related procedure on
this equipment!
7. Do not place the unit near combustible materials or hazardous fumes or vapors.
8. Do not install unit in a corrosive environment. A corrosive environment may lead to poor performance
and deterioration of unit.
9. Make sure the chamber and any remote equipment provided are leveled when installed. The chamber
door may swing shut on personnel if unit is tilted.
10. A main power disconnect is not provided with your unit. We recommend that a fused disconnect switch
on a separate branch circuit be installed as the power source in accordance with all National and Local
Electrical Codes. If your unit is equipped with a power cord and plug, you must utilize a receptacle with
the appropriate rating, which is on a branch circuit of its own.
11. Do not position the chamber in a manner that would make it difficult to operate your main power
disconnect switch.
12. Your power supply line voltage may be too low or too high to properly and safely operate your
equipment. Before making the power supply connection to your equipment, you must follow the
specific directions stated under “Power Connection” in the Installation Instructions section. Failing to
perform the directions stated may damage your equipment and void your warranty!
13. Control panels, gauge boxes, the conditioning compartment, etc., contain exposed electrical
connections. Keep panels in place properly when the unit is in operation. Disconnect and Lock-Out /
Tag-Out all electrical power from the unit at its source before servicing or cleaning.
14. Do not adjust any mechanical components or any electrical components except as directed in this
manual.
15. Do not overload the floor of the chamber workspace or load the unit unevenly.
2.0 SAFETY WARNINGS & SYMBOLS

BLUE M
Model ESP400 Industrial Oven Page 6
16. Do not stack multiple units on top of one another.
17. Do not exceed the temperature rating of your chamber.
18. Human exposure to temperature extremes can cause injury. Do not open oven doors until oven
temperature drops below 200°F (93°C), when applicable. Take appropriate precautions before
opening oven doors and upon handling any chamber contents.
19. Always cool the oven down below 167°F (75°C) before shutting it down. Otherwise, damage to the
circulation motor shaft bearings will result.
20. Do not modify any component on this unit. Use only original equipment manufactured (OEM) parts as
replacement parts. Modifications to any component, or the use of a non-OEM replacement part could
cause damage to your equipment, personal injury, or death.
INTERNATIONAL WARNING / SAFETY SYMBOL DEFINITIONS
Obey all “DANGER”, “WARNING”, and “CAUTION” labels shown in the manual and mounted on the
equipment. Do not remove any labels mounted on the equipment.
“WARNING OF HAZARDOUS AREA”
“WARNING OF DANGEROUS ELECTRIC VOLTAGE”
“WARNING OF HOT SURFACE”
“EARTH (GROUND) PROTECTIVE CONDUCTOR TERMINAL”

BLUE M
Model ESP400 Industrial Oven Page 7
3.1 Application
This manual applies to the Model ESP400 Industrial Oven, which is a mechanical convection type oven
designed for constant temperature work and where fast run-up / cool-down rates are required. A unique
airflow management system permits air circulation to be varied from a single pass type system to a full
recirculation type system.
The following models with unique suffixes are available.
Model ESP400A - - 120 VAC
Model ESP400B - - 208 VAC
Model ESP400C - - 240 VAC
Suffixes A, B, and C denote electrical ratings.
Models numbers with the additional suffix “-UL” denotes that the unit is certified as “UL Listed” by
Underwriters Laboratories, Inc. Special design concepts incorporated into these units are described where
applicable.
3.2 Specifications
Temperature Range: + 15° C above ambient to 260° C, +/- 1.0° C after stabilization
Workspace Capacity: 2.8 cubic feet
Run-up Time to 260° C (Empty chamber with intake & exhaust closed)
20 Minutes at 240 VAC
30 Minutes at 208 VAC
60 Minutes at 120 VAC
3.0 PRODUCT SPECIFICATIONS & OVERVIEW
ESP400 SPECIFICATIONS
Capacity
Ft3
(Liters3)
Inside Dimensions
W x D x H In. (Cm)
Overall
Dimensions
W x D x H In. (Cm)
Heater KW Full Load
Amps
Voltage
1 Phase
50/60 Hz
2.8
(79)
19 x 15 x 18
(48 x 38 x 45)
32 x 24 x 37
(80 x 61 x 94)
1.5 @120 V
2.5 @ 208 V
3.4 @ 240 V
16.5 @ 120 V
13.5 @ 208 V
15.5 @ 240 V
120
208
240

BLUE M
Model ESP400 Industrial Oven Page 8
3.3 Conditioning Functions
Heating is achieved by recirculating oven air through open air nichrome wire heater elements in the
conditioning plenum. The plenum is located in the bottom of the chamber.
Cooling is achieved by opening the intake and exhaust dampers.
Air flow is generated by a centrifugal blower wheel mounted in the conditioning plenum. The blower
wheel is directly driven by an externally mounted motor. A horizontal airflow type system is employed.
A variable air management system allows variation from single air pass mode to full air recirculation
mode. Indented scales are scribed into the intake and exhaust damper pivot assemblies.
3.4 Equipment and Control Features
Partlow 1160+ Temperature Controller:
Temperature conditions are controlled by a Partlow 1160+ Temperature Controller, which uses a Type J
thermocouple for temperature measurement. The 1160+ is a versatile single channel non-profiling type
controller that features one universal type input and time proportioned control for heating. Advanced
communication, display interface, and configuration software improvements have been added to the 1160+.
Optional communications can be provided with RS-485 type serial communications (2 wire) and user-
selectable Modbus or ASCII protocol.
Alternate Temperature Controller - - Partlow 1166:
The alternate Partlow Model 1166 Temperature Controller may be employed to control your heating process.
This controller is a single channel profiling type that features a capacity of 4 programs with up to 16 steps in
each program. An event output is included that can be programmed ON of OFF at the beginning of each
step. A Type J thermocouple is used for temperature measurement.
Optional communications can be provided with RS-485 type serial communications (2 wire) using Modbus /
RTU protocol.
Overtemperature Protection:
Overtemperature protection is provided with a Partlow 1161+ High Limit Controller, which serves as a high
heat limit cutout. This controller will shut down the heat control system and blower motor when a high heat
limit is detected.

BLUE M
Model ESP400 Industrial Oven Page 9
Digital Process Timer - Optional:
An Eagle Signal Model B856 Digital Process Timer may be provided to time your heat process cycle. The
Model B856 is a programmable 1/16 DIN timer that features five selectable standard timing operations, with
five selectable time ranges. The timer will start timing once the Start pushbutton is pressed. When the total
preset time has elapsed, the timer will remove power from the heater. An audible alarm will sound. A reset
button is provided to reset the system for the next cycle.
24 Hr. / 7 Day Timer - Optional:
A Grasslin Model FM1D 24 Hour / 7 Day Timer may be provided, which features 24-hour or 7-day
programming to start your process cycle. Up to 20 programs can be stored with up to 10 ON and 10 OFF
Events per day. The timer also features a manual override.
Chart Recorder - Optional:
A chart recorder may be provided to record temperature over time. Some models may include a digital
display of actual temperature. A Type J thermocouple is used for temperature measurement.
3.5 Operating Parameters and Requirements
This equipment is designed to operate safely when the following environmental conditions are met:
Indoor use only.
Within a temperature range of 5°C to 40°C (max).
Maximum relative humidity 80% for temperatures up to 31° C, decreasing linearly to 50% relative
humidity at 40° C.
Supply voltage fluctuations do not exceed ±10% of nominal voltage.
Overvoltage category II, per UL-3101.
Pollution category II, in accordance with IEC 664, per UL-3101.
Altitude up to 2000 m.
The listed chamber specifications are based on operation at 24° C ambient temperature, altitude at sea level,
and a 60 Hz power supply. Chamber operation utilizing a 50 Hz power supply may derate the listed
performance specifications.
Equipment damage, personal injury, or death may result if this equipment is operated or maintained by
untrained personnel. Operators and service personnel must be familiar with the location and function of all
controls and the inherent dangers of the equipment before operating or maintaining it. TPS shall not be liable
for any damages, including incidental and/or consequential damages, regardless of the legal theory
asserted, including negligence and/or strict liability. Observe all safety warnings and operating parameters
listed in this manual, as well as all Caution, Danger, and Warning signs or labels mounted on the equipment
to reduce the risk of equipment damage and personal injury.
Questions? Please consult a Blue M Applications Engineer or our Service Dept. for questions, or for
additional information. And thanks for choosing a Blue M Oven!

BLUE M
Model ESP400 Industrial Oven Page 10
The following drawings are provided:
Wiring Diagram (Includes Parts List) xxxxxWD
General Layout (Special Units Only) D001
The following information and vendor manuals are provided:
Partlow 1160+ Temperature Controller / Partlow 1161+ High Limit Controller Manual (Same Manual)
Optional Equipment – Vendor manuals will be supplied when the option is included.
Partlow 1166 Controller Manual - - Manual No. 59129-2
Eagle Signal B856 Process Timer Manual
Intermatic / Grasslin FM1D Series 24Hr / 7 Day Timer Manual (Qty. 2 - Installation & Programming)
Chart Recorder Manual
Note: Various other vendor manuals and product information sheets may be provided, which contain
important operation and maintenance instructions. Their inclusion is subject to vendor availability.
4.0 DRAWINGS
,
INFORMATION
,
and VENDOR INSTRUCTION LISTINGS

BLUE M
Model ESP400 Industrial Oven Page 11
Read this section completely before attempting to install, or operate the equipment.
5.1 Delivery and Uncrating of Unit
Inspect equipment and shipping crate immediately upon receipt. If any damage is apparent, you should
discuss it with the trucking delivery person and contact the transportation company immediately. Make notes
of any damage on the Bill Of Lading. Retain all shipping materials for inspection. Any claims for damage
must start at the receiving point. Check packing slip carefully and make sure all materials have been
received as indicated on the packing ticket. Unless otherwise noted, YOUR ORDER HAS BEEN SHIPPED
COMPLETE.
Chambers and any remote machinery skids or control cabinets should be handled and
transported in an upright position. They must never be carried on their back, front, or any side.
Important! Due to the vibration incurred during shipping and handling, it is possible that mechanical
connections could become loose. Check all connections to make sure they are secure.
5.2 Location and Installation of Unit
Classification: NFPA 86 Class B ovens are heat utilization equipment operating at approximately
atmospheric pressure wherein there are no flammable volatiles or combustible material being heated in
the oven.
Do not place the unit near combustible materials or hazardous fumes or vapors.
Do not locate unit in areas of wide ambient temperature variation such as near vents or outdoor
entrances.
Do not install unit in a corrosive environment. A corrosive environment may lead to poor performance
and deterioration of unit.
Ventilation: The oven should be installed in an area where there is good air ventilation. Allow a
minimum of 5 inches between any wall and any oven side.
Do not position the oven in a manner that would make it difficult to operate your main power
disconnect switch.
Make sure the oven is leveled when set up. The floor of the chamber should be leveled with a Spirit
Level to +/- 1/8” (3.175 mm) front to back and side to side.
Floor stands may be provided as an option.
Stacking frames may be provided to securely stack units on top of one another.
Very Important! Upon completion of the initial installation of the chamber and upon completion of any
maintenance procedure, make sure that all access panels that have been removed are reinstalled securely
before operating the unit.
5.0 INSTALLATION INSTRUCTIONS

BLUE M
Model ESP400 Industrial Oven Page 12
5.3 Equipment Access & Features
FRONT RIGHT
REAR RIGHT
Thermocouple Wire
Protector Plate
Exhaust Port
Intake Port
Power Supply
Junction Box

BLUE M
Model ESP400 Industrial Oven Page 13
Left and right views of the machinery base are shown below. The unit is shown laying on its side.
Note: Your equipment configuration may be slightly different from what is shown.
MACHINERY BASE- ESP400 - Left
MACHINERY BASE - ESP400 - Right
Power Supply
Junction Box Heater
Terminals
TC Wires
Circ.
Blower
Motor
Power
Supply
Cables

BLUE M
Model ESP400 Industrial Oven Page 14
5.4 Exhaust Connection
A 3” diameter exhaust port is located on the left side of the oven with a manual butterfly damper. An exhaust
guard is installed to prevent contact with the extremely hot port surface.
A draft diverter, vacuum breaker, exhaust hood, or similar device should be connected between the oven
and the exhaust. This connection prevents “chimney effect” which sucks heat out of the chamber and results
in slow run-up times or poor temperature uniformity. Never use an exhaust stack directly between the oven
and the exhaust.
Vent ductwork should be run to a location outside of the building (as necessary). This should be done in
accordance with all local code regulations. Make sure all connections are secure.
Warning! The exhaust port can become extremely hot. Do not touch. Avoid contact between the
port and flammable materials. Do not vent exhaust against combustible surfaces, areas, or
materials.
BLUE M ELECTRIC
A UN IT OF GE NE RAL S IGN AL
®
STABIL-THERM
OVER
TEMP
OUTPUT
LATCH ED
UNDER
TEMP
1-800-448-9358
LIMIT
RESET
FM
on
off
EXHAUST MODIFICATIONS
Intake
Exhaust Hood
EXHAUST PORT with GUARD

BLUE M
Model ESP400 Industrial Oven Page 15
- 60 HERTZ SUPPLIES -
LINE VOLTAGE MIN. / MAX. TABLE
Chamber
Voltage
Rating
Minimum
Voltage
Maximum
Voltage
120 108 132
208 188 228
240 216 264
60 Hz
Supply
Operation outside these
limits can result in damage
to chamber equipment.
5.5 Power Supply Specifications and Connection
Model / Supply Specifications Main Disconnect Recommended Rating
Model ESP400A: 120 VAC, 16.5 A, 1PH, 60 HZ 21 A
Model ESP400B: 208 VAC, 13.5 A, 1PH, 60 HZ 17 A
Model ESP400C: 240 VAC, 15.5 A, 1PH, 60 HZ 19 A
Warning! Before making the power supply connection to your unit, you must perform the following
procedure:
1. Verify the power supply voltage rating established for your chamber (listed above). The voltage rating
is also found on the serial tag on the side of the oven. Note the rated value here:
2. Measure and record the intended voltage source. Note the measured value here:
3. Reference the “Line Voltage Min/Max Tables” below. Verify that the power supply voltage source you
measured and recorded is within the minimum and maximum allowable operating voltages for your
chamber voltage rating. If it is not within this operating range, do not make the power connection!
Otherwise, erratic operation and damage may occur to your equipment, which may void your warranty.
If you have any questions, please call the TPS Service Department.
Important! One of the most common causes of equipment malfunction is low line voltage as the power
source to the unit. Ordinarily in this condition, the heat output would be reduced and the system's motors
would operate erratically, eventually overheat, and shut down. You must be certain that your equipment is
connected to a circuit with an adequate voltage and current source. An oversupply voltage would also cause
erratic operation and eventual shutdown, or damage to your equipment.

BLUE M
Model ESP400 Industrial Oven Page 16
Making the Power Supply Connection to the Chamber:
A main power disconnect is not provided with your chamber. We recommend that a fused disconnect switch
on a separate branch circuit be installed as the power source to your chamber, in accordance with all
national and local electrical codes. Reference the Electrical Schematic for all electrical requirements.
A power supply junction box is installed at the rear of the unit with ¾” knockouts. Connect your power supply
cables to the labeled terminal blocks. As an option, a power cord and plug may be supplied with your unit.
Warning! High Accessible Current – An Earth connection is essential before connecting the power
supply. Make sure equipment is properly grounded in accordance with all codes.
5.6 Application of Power
Before energizing any equipment, make a visual inspection for loose components, electrical connections,
fittings, etc. Shut all operating switches to the “OFF” position before energizing.
Have trained personnel start and check out the equipment before its first cycle.
120 VOLT AC TERMINAL BLOCKS
208 / 240 VAC TERMINAL BLOCKS
Black / White
Power Leads Black / Black
Power Leads

BLUE M
Model ESP400 Industrial Oven Page 17
A high volume horizontal airflow system is employed with the conditioning system to provide maximum
temperature uniformity. The heating and generation of airflow occurs in the conditioning plenum located
below the workspace. The plenum is isolated from the workspace so that no direct heat radiation can occur.
Air circulation is generated by a centrifugal type blower wheel, which is driven by an externally mounted
motor. A unique airflow management system allows air circulation to be varied between a One-Pass type
system and a Full Recirculated type system. This is achieved by opening / closing the air intake and exhaust
dampers. Both systems are described later in the section. Dampers should be opened to remove unwanted
process vapors, shorten drying times, or to cool down the oven after the heating cycle.
Basic Airflow Description:
Process air is heated as it is drawn in by the blower wheel and forced through open air electric wire
elements. The elements are configured in a cylindrical stack and are supported by ceramic discs. Heated air
is discharged up into the right side duct wall. It then enters the workspace through perforations over the
entire height and depth of the chamber. Air flows horizontally across the workspace to condition the product,
and exits through perforations in the left side duct wall. Processed air returns to the conditioning plenum for
reconditioning. It may be exhausted and mixed with fresh ambient air in varying degrees, depending on the
settings of the intake and exhaust dampers.
Type J Thermocouples are used for temperature sensing by both the main and limit controllers. These are
mounted in the airflow at the top of the workspace.
6.0
A
IR CIRCULATION SYSTEM
AIR CIRCULATION
Air Circulation
Conditioning Plenum
Thermocouples

BLUE M
Model ESP400 Industrial Oven Page 18
The photo below shows the conditioning plenum with both the main cover and separate heater cover
removed. An air diffuser panel is mounted on the right side wall to uniformly direct airflow to both the top and
bottom of the perforated duct wall. The air intake damper is shown fully open.
The photo below includes the exhaust port, along with the heater cover installed. The air intake damper is
shown fully open.
CONDITIONING PLENUM AIR CIRCULATION
CONDITIONING PLENUM – INTAKE DAMPER FULLY OPEN
Air Intake Damper
Fully Open
Blower
Wheel
Intake
Heater Stack
Air Diffuser Panel
Exhaust Port
Intake Damper

BLUE M
Model ESP400 Industrial Oven Page 19
The photos below shows the intake damper fully closed.
Adjustable Air Intake and Exhaust Dampers:
Adjustable air intake and exhaust dampers are employed to vary air circulation between a One-Pass type
system and a Full Recirculated type system.
Both dampers should be slightly opened for the following conditions.
1. To remove undesirable exhaust vapors generated by the heating process.
An exhaust duct should be connected to the exhaust port and run to a location out of the building in
accordance with all local safety codes.
2. To promote faster drying times.
3. When operating near ambient temperatures.
Air friction caused by the blower wheel circulating process air causes a rise in chamber temperature.
This can not be controlled by the temperature controller. Both dampers should be opened wider as you
operate closer to ambient temperatures to purge excessive heat from the chamber.
CONDITIONING PLENUM – INTAKE DAMPER FULLY CLOSED
Intake Damper
THERMOCOUPLE WIRES – REAR OF OVEN
Cover Plate
Removed

BLUE M
Model ESP400 Industrial Oven Page 20
Intake Damper: The intake damper includes a pivot assembly with a linkage to the butterfly damper. You
must loosen the knob to slide the pivot assembly right or left, which opens and closes the damper. A damper
setting scale is indented into the frame. It is marked “Closed, 1, 2, 3, Open”. Make sure you tighten the knob
after changing the setting.
Note: The indented scale is marked for reference only. There is no related unit of measure tied this scale.
Exhaust Damper: The exhaust damper includes a lever attached to the damper shaft. You must loosen the
wingnut on the shaft assembly to open and close the butterfly damper. An indented “Open” to “Shut” scale is
marked with graduated lines on the assembly. Make sure you tighten the wingnut after changing the setting.
ADJUSTABLE AIR INTAKE DAMPER
ADJUSTABLE AIR EXHAUST DAMPER
Indented Scale
ADJUSTABLE AIR EXHAUST DAMPER
Wingnut
Indented
Marks