XLT Ovens 1832 Quick start guide

XLT Ovens
PO Box 9090
Wichita, Kansas 67277
US: 888-443-2751 FAX: [phone] INTL: 316-943-2751 WEB: www.xltovens.com
XLT Gas Oven & XLT Hood
Parts & Service Manual
XD 9006B
KSWHHE
10/02/2020
For use with the following XLT Gas Oven Versions:
Korea (K) H
Standard (S) H
World (W) H
For use with the following XLT Gas Hood Versions:
Standard (S) E
World (W) E
Electronic copies of this manual, Technical Specifications, Installation & Operation Manual, Architectural
Drawings, & a list of International Authorized Distributors are available at: www.xltovens.com
2000887
Original Instructions
Read This Manual Before Using This Appliance.
CAUTION
42:2003 A11:2012 7.12 Re-
P&S manuals

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2
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors and liquids on the vi-
cinity of this or any other appliance
Post in a prominent location instructions to be followed in the event you smell
gas. This information can be obtained by consulting your local gas supplier.
Improper installation, adjustment, alteration, service or maintenance can
cause property damage, injury, or death. Read the installation, operating and
maintenance instructions thoroughly before installing or servicing this
equipment.
WARNING & SAFETY INFORMATION
WARNING
This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety.
WARNING
WARNING
WARNING
XLT has spent millions of dollars designing and testing our products as well as developing
Installation & Operation Manuals. These manuals are the most complete and easiest to understand
in the industry. However, they are worthless if they are not followed.
We have witnessed store operators and building owners lose many thousands of dollars in
lost revenue due to incorrect installations. We highly recommend you follow all instructions given
in this manual as well as follow best practices in plumbing, electrical, and HVAC building codes.
Revision Comments Date
A New Release 06/05/2020
B
Restructured Pg. 2-10, Removed Recommended List Of Tools Pg. 11, Updated Oven T heory Of
Operation Pg. 12-19, Added LUI Image Pg. 30 & 31, Added VFD Image Pg. 38, Updated Part
Descriptions Pg. 42-75, Updated Schematics Pg. 76-84
10/02/2020
Revision History Table

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3
Tips give a special instruction that can save time or provide other benefits while installing
or using the product. The tip calls attention to an idea that may not be obvious to first-time
users of the product.
NOTE
Notes indicates an area or subject of special merit, emphasizing either the product’s
capability or common errors in operation or maintenance.
WARNING & SAFETY INFORMATION
TIP
Indicates a high voltage. It calls your attention to items or operations that could be
dangerous to you & other persons operating this equipment. Read the message &
follow the instructions carefully.
HIGH
VOLTAGE
Indicates a potentially hazardous situation that, if not avoided, can result in serious
injury or death.
DANGER
Indicates a potentially hazardous situation, that if not avoided, can result in minor
to moderate injury or serious damage to the product. The situation described in the
CAUTION may, if not avoided, lead to serious results. Important safety measures
are described in CAUTION (as well as WARNING), so be sure to observe them.
CAUTION
Definitions & Symbols
A safety instruction (message) includes a “Safety Alert Symbol” & a signal word or phrase
such as DANGER, WARNING or CAUTION. Each signal word has the following meaning:
WARNING
Indicates a potentially hazardous situation, that if not avoided, can result in cuts or
being crushed. It calls your attention to items or operations that could be dangerous
to you & other persons operating this equipment.

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4WARNING & SAFETY INFORMATION
 Post in a prominent location instructions to be followed in the event you smell gas. This infor-
mation can be obtained by consulting your local gas supplier.
 In the event a gas odor is detected, shut off the gas at the main shutoff valve immediately.
Contact your local Gas Company or supplier.
 Do not restrict the flow of combustion and/or ventilation air to the unit. Provide adequate
clearance for operating, cleaning, and maintaining the unit & adequate clearance for operating
the gas shutoff valve when the unit is in the installed position.
 Keep the area free & clear of combustible material. DO NOT SPRAY AEROSOLS IN THE
VICINITY OF THIS APPLIANCE WHILE IT IS IN OPERATION.
 Ovens are certified for installation on combustible floors.
 Electrical schematics are located inside the control box of the oven, in this manual, and online
at www.xltovens.com. Disconnect input power to the unit before performing any maintenance.
 This unit requires a ventilation hood that must conform to local codes.
 This unit may be operated with either natural gas or liquid petroleum fuel as designated on the
data plate label located on the side of the unit.
 This unit must be operated by the same voltage, phase, & frequency of electrical power as des-
ignated on the data plate located on the side of the unit.
 Minimum clearances must be maintained from combustible & non-combustible construction
materials.
 Follow all local codes when installing this unit.
 Follow all local codes to electrically ground the unit.
 Appliance is not to be cleaned with high pressure water.
 XLT ovens are certified for use in stacks of up to four (4) units of XLT products. Integration
of other manufacturer’s products into an oven stack is not recommended, & voids any warran-
ties. XLT assumes no liability for mixed product applications.
 Failure to call XLT Customer Service at 1-888-443-2751 prior to contacting a repair company
voids any & all warranties.
 PLEASE RETAIN THIS MANUAL FOR FUTURE REFERENCE.
SAFETY DEPENDS ON YOU
This appliance is for professional use by qualified personnel. This appliance must
be installed by qualified persons in accordance with the regulations in force. This
appliance must be installed with sufficient ventilation to prevent the occurrence of
unacceptable concentrations of substances harmful to health in the room in which
it is installed. This appliance needs an unobstructed flow of fresh air for satisfac-
tory operation & must be installed in a suitably ventilated room in accordance
with current regulations. This appliance should be serviced by qualified personnel
at least every twelve (12) months or sooner if heavy use is expected.
CAUTION
Installation and repairs of all electrical appliances & ventilation exhaust hoods
should only be performed by a qualified professional who has read & understands
these instructions & is familiar with proper safety precautions. Read this manual
thoroughly before installing or servicing this equipment.
DANGER

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5
Warning & Safety Information...........................................................................................................2
General ...............................................................................................................................................6
Warranty............................................................................................................................................. 8
Installation Responsibilities ............................................................................................................. 10
Oven Theory of Operation ...............................................................................................................12
Hood Theory of Operation ...............................................................................................................20
Oven Troubleshooting...................................................................................................................... 26
Hood Troubleshooting...................................................................................................................... 28
Oven Service Procedures.................................................................................................................. 30
Hood Service Procedures ................................................................................................................. 38
Parts Ordering...................................................................................................................................40
Oven Parts ........................................................................................................................................ 41
Hood Parts ........................................................................................................................................ 73
Electrical Schematics ..................................................................................................................... .76
Notes............................................................................................................................................... . 93
TABLE OF CONTENTS
For maintenance procedures, please refer to the XLT Installation & Operation Manual.

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6GENERAL
This manual, which contains an illustrated parts breakdown, has been prepared as an aid in
understanding how the unit operates, how to diagnose problems, and order parts for the equipment.
All of the parts, listed in the parts breakdown, are manufactured with the same precision as the
original equipment.
XLT parts and service providers are located throughout the principle cities of the United
States as well as throughout the world. Authorized distributors are available worldwide as well.
The Theory of Operation section describes how the unit operates. An understanding of
normal operation will greatly aid diagnosis and troubleshooting. The Troubleshooting section con-
tains information about service error codes including the display read outs, MC LEDs, error deter-
minations and troubleshooting actions. The illustrated parts section identifies the various sub-
assemblies and detailed parts which make up the equipment, as well as the part number. An expla-
nation of how to order parts is included.
This manual is designed to supplement the Installation & Operation Manual provided with
the unit when new. Please refer to it for descriptions, dimensions, weights, electrical requirements,
maintenance schedules, and certifications.
XLT wants you to be totally satisfied with every aspect of owning & using your oven &
hood. Your feedback, both positive & negative, is very important to us as it helps us understand
how to improve our products & our company. Our goal is to provide you with equipment that we
can be proud to build & you can be proud to own.
To receive technical support for the oven or hood you purchased, XLT has qualified cus-
tomer service personnel that can provide assistance on any type of XLT equipment problem you
may experience. Customer Service is available 24/7/365 at 888-443-2751 or visit
www.xltovens.com.

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7
Save this Manual
This document is the property of the owner of this equipment.
XLT reserves the right to make changes in design & specifications, and/or make additions
to or improvements to its product without imposing any obligations upon itself to install them in
products previously manufactured.
All Right Hand & Left Hand designations in this manual are from the point of view as seen
below.
Left hand (LH) Right hand (RH)
Front of Oven
GENERAL

Warranty –US and Canada
Rev J Approval Date: 10/16/2019
7761 W Kellogg Drive 67209-2003 - PO Box 9090 67277-0090 - Wichita, Kansas
Voice [phone] - [phone] - Fax [phone]
www.xltovens.com
XLT warrants Version H ovens manufactured aer October 16, 2019 to be free from any defect
in material and workmanship under normal use for seven (7) years from the date of original purchase
by the end user, and further warrants main fan blades, conveyor shas, and conveyor bearings for ten
(10) years. XLT further warrants all ovens/hoods to be free from rust for ten (10) years from the date
the equipment is originally purchased. XLT warrants Version E hoods manufactured aer October 16,
2019 to be free from any defect in material and workmanship under normal use for seven (7) years
from the date of original purchase by the end user purchaser. If the purchase includes a pre-piped An-
sul system on both the ovens and hood, the warranty will be increased to ten (10) years on both pieces
of equipment. In the event of a part failure, XLT will furnish a replacement part and pay for all labor
associated with the replacement of the part. If upon inspecon XLT determines that the part is not de-
fecve, all incurred costs will be the responsibility of the end user purchaser. This warranty is extend-
ed to the original end user purchaser and is not transferable without prior wrien consent of XLT.
Damages are limited to the original purchase price.
DUTIES OF THE OWNER:
 The owner must inspect the equipment and crates at me of receipt. Damage during shipment is
to be immediately reported to the carrier, XLT, and documented on the Bill of Lading
 The equipment must be installed and operated in accordance with the Installaon and Operaon
Manual furnished with the unit
 This warranty shall not excuse the owner from properly maintaining the equipment in accordance
with the Installaon and Operaon Manual furnished with the unit
 A copy of the “Inial Start-Up Checklist” must be lled out and returned to XLT when the unit is
inially installed, and/or when the unit is removed and installed in another locaon
 The gas, electric, and HVAC ulies must be connected to the oven and installed by locally licensed
contractors
 Failure to contact XLT prior to contacng a repair company for warranty work voids any and all
warranes
WHAT IS NOT COVERED:
 Freight damage
 Overme charges
 Any part that becomes defecve because of ulity services (power surges, high or low voltages,
high or low gas pressure or volume, contaminated fuel, or improper ulity connecons)
 Any part that becomes defecve because of moisture and/or other contaminants
 Conveyor belts
 Filters
 Exhaust Fans
 Light Bulbs
 Painted or Powder Coated surfaces
 Normal maintenance or adjustments
 This warranty shall not apply if the equipment or any part is damaged as a result of accident, casu-
alty, alteraon, misuse, abuse, improper cleaning, improper installaon, improper operaon, natu-
ral disasters, or man-made disasters
CLAIMS HANDLED AS FOLLOWS:
 Should any such defect be discovered, XLT must be noed. Upon nocaon, XLT will arrange for
necessary repairs to be made by an authorized service agent. Denial of services upon the arrival of
an authorized service agent will release XLT of any and all warranty obligaons.

Warranty –International
Rev L Approval Date: 06/01/2020
7761 W Kellogg Drive 67209-2003 - PO Box 9090 67277-0090 - Wichita, Kansas
Voice [phone] - [phone] - Fax [phone]
www.xltovens.com
XLT warrants Version H ovens manufactured aer October 16, 2019 to be free from any defect
in material and workmanship under normal use for ve (5) years from the date of original purchase by
the end user, and further warrants main fan blades, conveyor shas, and conveyor bearings for ten (10)
years. XLT further warrants all ovens/hoods to be free from rust for ten (10) years from the date the
equipment is originally purchased. XLT warrants Version E hoods manufactured aer October 16, 2019
to be free from any defect in material and workmanship under normal use for ve (5) years from the
date of original purchase by the end user purchaser. If the purchase includes a hood and the ovens both
the warranty will be increased to seven (7) years on both pieces of equipment. In the event of a part
failure, XLT will furnish a replacement part and pay for all labor associated with the replacement of the
part. If upon inspecon XLT determines that the part is not defecve, all incurred costs will be the
responsibility of the end user purchaser. This warranty is extended to the original end user purchaser
and is not transferable without prior wrien consent of XLT. Damages are limited to the original
purchase price.
DUTIES OF THE OWNER:
 The owner must inspect the equipment and crates at me of receipt. Damage during shipment is to
be immediately reported to the carrier and also to the Distributor/Service Provider
 The equipment must be installed and operated in accordance with the Installaon and Operaon
Manual furnished with the unit
 This warranty shall not excuse the owner from properly maintaining the equipment in accordance
with the Installaon and Operaon Manual furnished with the unit
 A copy of the “Inial Start-Up Checklist” must be lled out and returned to Distributor/Service
Provider and to XLT when the unit is inially installed, and/or when the unit is removed and
installed in another locaon
 The gas, electric, and HVAC ulies must be connected to the oven and installed by locally licensed
contractors
 Failure to contact the Distributor/Service Provider prior to contacng a repair company for warranty
work voids any and all warranes
WHAT IS NOT COVERED:
 Freight damage
 Overme charges
 Any part that becomes defecve because of ulity services (power surges, high or low voltages, high
or low gas pressure or volume, contaminated fuel, or improper ulity connecons)
 Any part that becomes defecve because of moisture and/or other contaminants
 Conveyor belts
 Filters
 Exhaust Fans
 Light Bulbs
 Painted or Powder Coated surfaces
 Normal maintenance or adjustments
 This warranty shall not apply if the equipment or any part is damaged as a result of accident,
casualty, alteraon, misuse, abuse, improper cleaning, improper installaon, improper operaon,
natural disasters, or man-made disasters
CLAIMS HANDLED AS FOLLOWS:
 Should any such defect be discovered, the Distributor/Service Provider must be noed. Upon
nocaon, Distributor/Service Provider will arrange for necessary repairs to be made by an
authorized service agent. Denial of services upon the arrival of an authorized service agent will
release XLT and Distributor/Service Provider of any and all warranty obligaons.

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10 INSTALLATION RESPONSIBILITIES
NOTE
If XLT employees are completing the installation process, they will be considered a
Service Company in relation to the table above.
Site Survey: Verify electric and gas meter/regulator sizes X
Supply wiring from TS1 #R3, R4, R5 to exhaust fan X
Supply (1) single phase 230 volt 10 amp circuit from breaker panel to
XLT Hood
X
Assembly of new hood per XLT Installation & Operation Manual X
Suspend XLT Hood from ceiling X
Install new exhaust fan on roof X
Supply power to XLT Hood X
Install Duct Cover or Valance above XLT Hood X
Assembly of new ovens per XLT Installation & Operation Manual
Bases assembled and set in place X
Ovens moved and stacked with proper lifting equipment X
Peel all PVC X
Assemble shrouds & brackets to XLT Oven/Hood X
Connecting fuel to XLT products
Install piping and drip legs X
Weld ducting to XLT Hood X
Check for leaks X
Install flexible gas hoses X
Connect electrical supply X
Connection may require Permit and Code Inspections X
Relocate Make-Up-Air to enter the room at the ends of the ovens X
Start-up per XLT Installation & Operation Manual: X
Gas pressure/leak testing, hood/oven functions, adjust as necessary X
Start-Up Checklist must be submitted to XLT to validate Warranty X
Owner/
Contractor
Service Company
Responsibility

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11
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12 OVEN THEORY OF OPERATION
Once the oven is plugged into the wall the Oven Machine Control (OMC) Power Light will illumi-
nate.
When the main power button on the Large User Interface (LUI) is pressed for one (1) second:
1. The LUI will illuminate and display actual temperature until set point is reached as well as
display belt time.
2. The Oven Fan Motor (M1) located in the Back Wall will run, illuminating the Main Fan
Light on the OMC.
3. The Fan (M3) located on the Control Panel will run.
4. The gas valve will receive power, illuminating the Heat Light on the OMC.
5. The conveyor belt will move, illuminating the Conveyor Light on the OMC.
6. The burner will ignite.
The first part of the Theory of Operation explains how electrical power is delivered to the
oven and initial sequences when the main power on the Large User Interface (LUI) is turned on.
The second part of the Theory of Operation section explains the function of components in alpha-
betical order. These components are also listed on the schematic.
 Line voltage for Standard Ovens is assumed to be 120 VAC, 60 Hz.
 Line voltage for World & Australian Ovens is assumed to be 230 VAC, 50 Hz.
 Line voltage for Korean Ovens is assumed to be 220 VAC, 60 Hz.
Part 1:
Power originates at the electrical connection on the wall. Line voltage is then carried into
the oven through the power cord to the Terminal Strip (TS1). The Neutral line is connected to
TS1-1 and L1 is connected to TS1-2 (TS1-3 on World ovens). From the other side of the TS1,
power is carried through the High Limit Switch (S3) and splits at Circuit Breaker (CB1) to go to
both the Power Supply (PS) and Oven Fan Motor Relay (R1) or the Variable Frequency Drive
(VFD). The PS then converts the line voltage into 24 VDC that is used to power TS2-1 through
TS2-3 positions at +24 VDC and TS2-8 through TS2-10 positions at -24 VDC. +24 VDC is dis-
tributed to the Oven Controls (OMC1) and (OMC2 if equipped) P10-4 via CB4/5 from TS2-2 and
OMC1 P4-2 from TS2-3. These wires are live as long as oven is connected to power on wall. The
wires at TS2-1 through TS2-3 and TS2-7 (if there is no hood) are live as long as oven is connected
to power on wall.
When the oven is turned on, a relay inside the OMC closes between P4-2 & P4-3, sending
24 VDC out of P4-3 to TS2-6 which distributes power to the Flame Sensor (FS), the FPPG Fan
(M3), the Ignition Control (IC) terminal 2 and call for heat IC terminal 4 via the Centrifugal
Legend from electrical schematics:
AL Alarm, Ignition
CAP Capacitor
CB Circuit Breaker
CS Current Sensor
FLT Power Filter, EMI
FS Flame Sense
IC Ignition Control
LUI Large User Interface
M1 Motor, Oven Fan
M2 Motor, Conveyor
M3 Motor, FPPG
OMC Oven Machine Control
PS Power Supply
PU Pick-Up
R1 Oven Fan Motor Relay
R2 Proving Relay
RTD RTD, High Limit
S2 Switch, Centrifugal
S3 Switch, High Limit
SR Spark Rod
TC Thermocouple
TS Terminal Strip
VFD Oven Fan Motor Frequency
Drive
V1 Gas Valve ON/OFF
V2 Gas Valve HI/LOW
V3 Gas Valve ON/OFF, Shut-Off

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13
OVEN THEORY OF OPERATION
Switch (S2) on Oven Fan Motor (M1). The IC then starts the trial for ignition. The OMC P11-1
will also send low voltage to the R1 or the Oven Fan Motor Relay (VFD World, Korea, and Aus-
tralia Only). When R1 closes, line voltage is applied from R1-2 to M1. OMC P11-2 will ground
V2 to open the high flame valve. If the oven is used with an XLT Hood the jumper at Molex Con-
nector (MC3) is removed and +24 VDC is sent to the hood. A relay in the hood will control the
oven operation as long as the LUI had the Remote Switch Function turned on.
Part 2:
AL - The Ignition Alarm is available on the Australian and Korean models. When the Ignition
Control (IC) goes into ignition lockout and pin1 is grounded the alarm will begin flashing and
beeping. The alarm receives +24 VDC from the TS2-1 on the master control box and if it is a dual
burner TS3-1 on the secondary box. Cycle power on the oven to reset alarm.
CAP - The Capacitor is physically mounted inside the Control Box but wired to the externally
mounted M1. The M1 is a Permanent Split Capacitor (PSC) motor. PSC means a capacitor motor
in which the starting capacitor and the auxiliary winding remain in the circuit for both starting and
running. The CAP is a 30.0 uF +/- 6% 370VAC/B 50/60 Hz.
CB - Circuit Breakers are used to protect electrical components. The current value is printed on the
front of all breakers. If a CB is tripped, eliminate the cause and press the front to reset.
CS - The Current Sensor detects electrical current (AC) in a wire, and generates a signal propor-
tional to it. The generated signal is analog voltage and then sends it to the OMC. This monitors the
condition of the oven fan motor (Non-VFD Ovens Only ).
FLT 1 - This is an inline filter used in world ovens. The filter is placed in series with the line volt-
age being supplied to the oven. The filter is used to reduce Electromagnetic Interference created by
our equipment and back-feeding it into other appliances. The Electromagnetic Compatibility
(EMC) filter in the gas oven uses capacitors to inhibit direct current while permitting alternating
current. The filters also use inductors which redirect high voltages and high frequencies by dissi-
pating them to ground. Filters should always be grounded to the oven.
FS - The Flame Sensor consists of a plastic housing and a flame sensor mount. The FS utilizes 24
VDC which originates at TS2-5. When the oven is turned on this terminal receives voltage. The
negative line is supplied via the TS2-9. When flame is present, a blue wire sends a 6.75 μA signal
from the connector to IC-10. The minimum flame sensitivity signal to maintain operation is 0.7
μA. The sensor visually looks at the flicker rate and the UV characteristics of the flame. If either of
these do not appear the sensor will not send current to the IC. The ignition will continue thru its
process until lockout.

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14 OVEN THEORY OF OPERATION
IC - The Ignition Control is powered by 24 VDC. The IC has two +24 VDC inputs; 1) from the
OMC via the TS2, and 2) a call for heat from the OMC via S2 which is mounted in M1. This will
turn a green LED on indicating IC has power and a call for heat. When the IC receives a call for
heat, it initiates a pre-purge lighting sequence. A red LED will blink once after about two (2) or
three (3) seconds to give notification that the lighting sequence has started. After about thirty (30)
seconds, two (2) events occur; 1) a high-voltage electrical signal will be sent to the Spark Rod
(SR) from the Spark Terminal. The high voltage jumps across a gap in the SR creating a spark that
can be heard, although the IC only produces this spark for four (4) seconds. 2) A VDC (+) will be
sent from terminal IC6 to Gas Valve V1-V2 via CB2 and CB3. The V1-V2 valve will open, allow-
ing fuel to flow into the burner. When the two events occur, spark and fuel flow, ignition will oc-
cur. When flame is sensed by the FS, a DC signal is sent to IC10. The IC uses this DC current to
prove ignition. A minimum of 0.7 μA DC is required to maintain operation. If the Burner fails to
light, the IC will reattempt ignition two (2) more times before the LED will flash three (3) times,
repeatedly, going into lockout.
13
2
1) P1
1) Alarm (Australian and Korean models only)
2) +24 VDC In
3) Not Used-Manual Reset
4) Call For Heat
5) Ground In
6) +24 VDC Sent To V1
7) Not Used-Digital Output
8) Not Used
9) Burner Ground
10) Signal Wire To Flame Sensor
2) P2- Not Used
3) Spark Terminal

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15
OVEN THEORY OF OPERATION
LUI - The Large User Interface (LUI) is powered by the OMC by the RS 485 cable. The main
power button is located on the front face of the LUI. The conveyor(s) and temperature of the oven
is controlled through the LUI. Factory settings are programmed for the oven size, VFD/Non VFD,
cool down mode, and Gas/Electric, etc. To change these refer to the Oven Operator Controls sec-
tion of the Installation & Operation Manual. For a Standard Oven it will also display the main fan
amps. The LUI will display error messages and maintenance alarms. There are twelve (12) menu
presets for predetermined time and temperature settings. The screen can be locked to prevent un-
wanted changes.
M1 - The Main Motor for standard ovens is a PSC, single phase, capacitor r un motor and
has an internal centrifugal switch (S2). The motor is dual voltage and reversible. The voltage to
power the motor comes from the R1-2. For world ovens M1 is a three (3) phase inverter rated mo-
tor with an internal S2. It gets power from a variable frequency drive (VFD) which is then turned
on by the OMC. The main motor (M1)will continue to operate for approximately thirty (30)
minutes or until the oven temperature is less than 225°F/108°C (+/-3°F/2°C) after the oven is
turned off. There are no user serviceable parts in the motor, and the bearings are permanently lu-
bricated.
1) P1- Not Used
2) P2- RS-485 Cable To OMC1
1) +5V
2) 485-
3) 485+
4) Ground
3) P3- RS-485 Cable To OMC2
1) +5V
2) 485-
3) 485+
4) Ground
4) P5- Ground
5) P17- Elan Programming
54123

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16 OVEN THEORY OF OPERATION
M2 - The Conveyor Motor is a brushless 24 VDC gear motor. The motor receives current from the
OMC through three (3) wires; 1) A black or “W” phase, 2) a white or “V” phase, and 3) a red or
“U” phase. They carry between 18 to 24 VDC. Each wire is energized by the OMC in sequence to
provide power to the individual stator coils which, in turn, provide motor rotation. To determine
the rotor position and send this position to the controller, three (3) Hall Effect switches are utilized.
They read the rotational information from a disc mounted on the rotor assembly. This information
is transmitted to the OMC by three (3) wires; 1) an orange “U” phase pole signal output, 2) a green
“V” phase pole signal output, and 3) a green/white “W” phase pole signal output. These are locat-
ed in a plug that inserts into the OMC1 or OMC2. There are two (2) additional wires in this plug;
1) a purple wire which is voltage for the pole sensor, and 2) a gray wire that is ground. The OMC,
using an internal logic circuit, energizes the stator coils to provide proper rotation and sets the en-
ergization (phase) timing to obtain the desired belt speed set on the controller. The motor drives an
integral gear box that reduces the motor output speed to give the correct travel time to the convey-
or belt. The integral gear box is sealed and permanently lubricated with grease. The ratio is 200:1.
This motor contains no serviceable parts. The OMC will detect if the conveyor belt has a jam by
monitoring the rotor signal. If the signal falls more than 25% below the expected rate a jam is de-
tected. This action will stop the conveyor and display an alarm on the LUI. To reset the alarm
press and hold the TIME key for ten (10) seconds.
M3 - The Flow Path Pressure Generating fan supplies combustion air for the Burner. It is con-
trolled by turning on and off the main power button. A filter is provided to ensure clean air. There
are no user serviceable parts in the motor, and the bearings are permanently lubricated.
OMC - The Oven Machine Control reads selections or parameters from the LUI. It holds the logic
for the conveyor controls and the temperature controls. The OMC will turn on or off the gas valve
(V2), start and stop M1, send the call for heat signal, read the thermocouple and monitor the cur-
rent sensor.
2
6
1
8
4
3
9
7
1) P1- Not Used - Digital Input
2) P2- RS-485 Cable To LUI
1) +5V
2) 485-
3) 485+
4) Ground
3) P4-Molex provided with har-
ness
1) +24 Remote Switch
2) +24 Power (In) Switch
3) Relay +24 Switched
(Out)
4) P5- Elan Programming
5) P6- Elan Serial Port
6) P7- Jumper For OMC 1 or 2
7) P8- Thermocouples
1) Red (-)
2) Yellow (+)
8) P9- Conveyor Motor
1) Motor SA
2) Motor SB
3) Motor SC
4) Hall +5V
5) Hall HC+
6) Hall HB+
7) Hall HA+
8) Ground
9) Not Used
9) P10-Molex provided with harness
1) Current Sensor
2) Current Sensor
3) 24 VDC(-) Main Power
4) 24 VDC(+) Main Power
10) P11-Molex provided with har-
ness
1) +24 VDC To R1/VFD
2) -24 VDC Ground to Gas
Valve V2
5
10

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17
OVEN THEORY OF OPERATION
PS - The Power Supply rectifies line voltage to 24 VDC, and supplies power to the OMC, IC, FS,
and S2. A four (4) amp fuse is used to provide over current protection, which is mounted on the
PS itself. There are no other fuses used anywhere else.
PU - The Pick-Up is physically mounted within M2 and utilizes hall effect technology integral to
the M2 to monitor the rotation speed. The hall effect signal is transmitted to the OMC, which con-
verts it into linear travel speed of the conveyor.
R1 - The Oven Fan Motor Relay is used as a remote switch to handle the higher amp load of
M1. Is a Single Pole Double Throw (SPDT) relay, which is an electrically operated switch. It uses
an electromagnet to operate a switching mechanism.
RTD - The Resistive Thermocouple Detector monitors the air temperature inside the bake cham-
ber. The RTD wire is a pure material, typically platinum, nickel, or copper. The material has an
accurate resistance/temperature relationship which is used to provide an indication of temperature.
S2 - The Centrifugal Switch is a SPDT switch physically mounted inside M1. When M1 comes up
to full speed, S2 closes and sends a 24 VDC signal to the IC. It functions as a safety feature to pre-
vent burner operation if the M1 fails to rotate.
S3 - Standard Ovens- The High Limit Switch for standard ovens is a bi-metal, normally closed
(NC), Single Pole Single Throw (SPST), switch physically mounted in the side panel of the Bake
Chamber. Its purpose is to provide fail safe operation. If the temperature of S3 exceeds
600°F/316°C it opens and interrupts line voltage to all components.
1) CN2- 24VDC
1) +24 VDC Main Power To OMC
2) +24 VDC
3) -24 VDC Ground To IC
4) -24 VDC Ground To TS2
2) CN1- Line Voltage
1) Neutral
2) Not Used
3) Line Voltage
1
2

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18 OVEN THEORY OF OPERATION
S3 - World Ovens- The High Limit Switch is an electronic, SPST switch. Its purpose is to provide
fail safe operation. If the RTD temperature exceeds 650°F/343°C the red LED will turn off and S3
opens to interrupt line voltage to all components. In order to reset the S3, you must unplug the
main power supply.
SR - The Spark Rod consists of a copper-clad metal mounting plate, and an electrode encapsulated
in ceramic insulation. The insulated electrode has a 1/4” male spade welded to it. This spade con-
nects to the Spark Terminal on the IC via a spark wire. The end of this rod is positioned near the
burner tube in such away so as to create a small gap. When the high-voltage signal from the IC
reaches the gap, it is forced to jump the gap resulting in a spark.
TC - The thermocouple is a type K. It consists of two different conductors that produce a voltage
proportional to a temperature difference between either end of the pair of conductors. The TC is
connected to P8-1 and P8-2 on the OMC. The millivolt signal is used to display the actual temper-
ature.
TS 1 & 2 - These are terminal strips, that serve as a connection point for wires.
V1-V2 - The Gas Valve consists of two (2) solenoid valves. V1 is open continuously during burner
operation, regardless of either actual or set point temperature values. V2 is a Hi/Low valve, and is
controlled by P11-2 on the OMC. There are two (2) brass fuel pressure testing ports; the upper
port is used for incoming pressure, while the lower port is used for high-bias pressure. There is a
regulator on the side of the valve to adjust the High-bias pressure.
5
4
3
2
1) COM– Line Voltage
2) N.O.- Switched Line Voltage
3) L2- High Limit Power
4) L1- High Limit Power
5) RTD
1
-4R
-1R
12
10L-
1L-
-10R
-1R
1R) 24 VDC Power to Optional
Alarm (World, Korea, Australian)
2R) 24 VDC Power To OMC
3R) 24 VDC Power To OMC1
4R) Not Used
5R) M3 (+)
6R) Power To Relay COM
7R) Cooldown Switch
8R) M3 (-)
9R) -24 VDC
10R) Ground
4L-
1L-
1) TS1- Terminal Strip
1L) S2 Signal Out
2L) Not Used
3L) Neutral In
4L) L1 In
1R) S2 Signal In
2R) Not Used
3R) Neutral Out
4R) L1 Out
*Above image references Right Hand Control (RH) ovens
2) TS2- Terminal Strip
1L) Power V2 and SRC
2L) Not Used
3L) +24 VDC In
4L) Not Used
5L) Power IC and FS
6L) Power S2 24 VDC
7L) SRC
8L) COM For V1
9L) Flame Sensor (-)
and -24 VDC Ground
To IC
10L) Ground To VFD

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19
1
V3 - The shut-off valve is only in the Australia Control box. When M1 is receiving power from the
VFD, the relay at VFD-R1 closes sending +24 VDC to V3. Which opens the valve.
VFD -The Variable Frequency Drive converts incoming single phase power of 50 Hz or 60 Hz
power so the ovens fan can run at the customer desired RPM’s, not to exceed 65 Hz. The VFD
converts the AC supply voltage to DC and then converts the DC to a suitable three-phase frequen-
cy source for M1. The VFD is turned on via the OMC P11-1. A complete VFD manual can be
found at www.xltovens.com.
4
1) Incoming Power
1) Neutral (L1)
2) Line Voltage (L2)
3) Not Used (L3)
4) Ground
2) Digital Inputs
1) Not Used
2) Start / Run
3) Stop Function
4) Not Used
5) Not Used
6) Not Used
7) COM To TS2
3) Main/Exhaust Fan Power
1) Ground
2) Power To Motor (U)
3) Power To Motor (V)
4) Power To Motor (W)
4) ModBus Comm
2
3
OVEN THEORY OF OPERATION

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20 HOOD THEORY OF OPERATION (STD W/FS)
The first part of the Theory of Operation explains how electrical power is delivered to the
hood and initial sequences when the HUI is turned on. The remainder of the Theory of Operation
section explains the function of components in alphabetical order. These components are also
listed on the schematic.
Part 1:
Power for the hood originates at the building’s electrical service panel. A total of four (4)
circuits are required; one (1) is a single phase high voltage circuit for Variable Frequency Drive
(VFD)/Fan circuit that connects to TS-1 and TS-2, and the remaining three (3) circuits are single
phase low voltage minimum 20A circuits for each oven that connects at the Hood Machine Control
(HMC) P3-1, P3-5, and P3-9 for line side, and neutral will connect at P3-3, P3-7, and P3-11.
Lights piggyback off the top oven power P3-9 on HMC.
The HUI mounted on the hood controls the lighting, VFD activation, Make Up Air (MUA)
activation and oven function. When the HUI Light button is touched a relay is closed and voltage
goes to the lights. When ovens are installed with a hood, the Switch Relocation Cord (SRC)
effectively eliminates the main power button located on the oven and transfers control to HUI
buttons on the hood. When HUI controls are touched a communication signal is sent to the VFD
via ModBus signaling it to turn on to a set frequency. At the same time a relay will allow line
voltage to be carried through the SRC to the oven activating it. When the HUI is activated the
MUA will turn on. The VFD has a built in power supply that is wired to TS1-1L. This puts the
VFD in run mode so whenever a power loss is sensed the VFD will start back up in run mode once
power is restored. The NO switch in the fire alarm system in the building needs to be connected to
TS1-R9 and TS1-R10. When the alarm is activated 24 VDC from TS1-R9 will return from the fire
alarm system to TS1-R10 then to HMC P8 to turn off lights, cooling fans, HUI, MUA, shut down
ovens and making both relays R1 & R2 switch from NC to NO, causing the VFD to run at 60 Hz.
When any one of the three oven buttons on the Hood User Interface (HUI) are touched
(capacitive touch);
1. The Exhaust Fan Motor (M1) located on the roof will run.
2. The ovens associated with the corresponding buttons will turn on.
Legend from electrical schematics:
CB Circuit Breaker
HMC Hood Machine Control
HUI Hood User Interface
LT Lamp
M1 Motor, Exhaust Fan
M2 Motor, Cooling Fan
M3 Motor, Cooling Fan
PS Power Supply
R1 Fire Suppression Relay
R2 Fire Suppression Time Delay
Relay
REC Receptacle
SSwitch
SRC Switch Relocation Cord
TS Terminal Strip
VFD Variable Frequency Drive