HOT ROCKS HR-70-22 Quick start guide

PARTS AND SERVICE MANUAL
ALL GEN 3 MODELS
FOR SUPPORT
[email protected]
855 395-5252

4Parts and service manual /Hot Rocks
TABLE OF CONTENTS
1. GENERALITIES............................................................................................................................................. 6
1.1 Revisions..................................................................................................................................................... 6
1.2 Warnings ..................................................................................................................................................... 6
1.3 Service ........................................................................................................................................................ 7
1.4 Authorized technician.................................................................................................................................. 8
1.5 Denitions.................................................................................................................................................... 8
2. OPERATION.................................................................................................................................................. 9
2.1 Technician interface..................................................................................................................................... 9
2.1.1 Visual Information............................................................................................................................... 9
2.1.2 Technician Login................................................................................................................................. 10
 2.1.3Conguration...................................................................................................................................... 12
2.1.4 Input/Output........................................................................................................................................ 16
3. INSTALLATION.............................................................................................................................................. 19
3.1 Moving the ovens ........................................................................................................................................ 19
3.1.1 Shipping ............................................................................................................................................. 19
3.1.2 Oven dimensions................................................................................................................................ 19
3.1.3 Oven assembly................................................................................................................................... 20
3.2 Start-up ovens............................................................................................................................................. 20
3.2.1 Complete the assembly...................................................................................................................... 20
3.2.2 Installation check list .......................................................................................................................... 21
4. MAINTENANCE – 6 MONTH......................................................................................................................... 22
4.1 Main Bearings Lubrication........................................................................................................................... 22
4.1.1 Back Side Bearings Lubrication ......................................................................................................... 22
4.1.2 Front Side Bearings Lubrication......................................................................................................... 23
4.2 Chain lubrication.......................................................................................................................................... 24

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4.2.1 Back side chains lubrication and adjustement ................................................................................... 24
4.2.2 Lubrication and adjustment of entry and exit conveyor...................................................................... 25
4.3 Main Conveyor Lubrication.......................................................................................................................... 26
4.4 Cleaning of the electrical cabinet ................................................................................................................ 28
4.5 Inspection the condition of the stone conveyor crumbs trays...................................................................... 28
4.6 General inspection (Skip to Maintenance – 12 month if needed) ............................................................... 29
5. MAINTENANCE – 12 MONTH....................................................................................................................... 30
5.1 Replace Spark and Flame Rod ................................................................................................................... 30
5.2 Replace Ingnition Cables ............................................................................................................................ 32
5.3 Inspect the ground conductivity................................................................................................................... 32
5.4 Inspect and clean the burner....................................................................................................................... 33
5.5 Inspect and clean fans ................................................................................................................................ 34
5.6 Verify the gas pressure................................................................................................................................ 35
5.7 Verify stone conveyor torque....................................................................................................................... 36
5.8 Adjust the entry and exit conveyor .............................................................................................................. 37
5.9 General inspection ...................................................................................................................................... 38
6 APPENDIX I – INSTALLATION CHECKLIST ............................................................................................ 39
7 APPENDIX II – ELECTRICAL DRAWINGS ............................................................................................... 41
8 APPENDIX III – MECHANICAL DRAWINGS ............................................................................................. 52

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1. GENERALITIES
1.1 Revisions
Revision Date Modications
0 2017-03-31 New technician’s manual
1 2017-07-18 Tablemodication
2 2017-12-13 New interface and connection
3 2020-02-06 Update manual format
4 2020-11-02 New generation of the oven
1.2 Warnings
DO NOT USE OR STORE GASOLINE, PRODUCTS WITH FLAMMABLE
VAPORS / LIQUIDS WITHIN THE VICINITY OF THIS, OR ANY OTHER APPLIANCE.
WARNING
This symbol species important safety instructions which, if not
followed, could endanger personal safety and/or property.
Read and follow all instructions in this manual before attempting
to operate the oven.
• Read, comprehend, and follow all instructions in this manual before starting. Keep this manual in a safe
place for regular reference.
• Only allow responsible individuals familiar with the instructions to operate the oven. Be sure to know the
controls, and how to stop the oven quickly.
• Never put hands near moving parts.
• Only allow authorized technicians to perform the maintenance of the oven.
• Remove all obstacles which may interfere with the oven’s function.
• Clear the work area of any items such as electrical wires, buckets, knives, etc.
• Do not sit or stand on the oven.
• Always turn off the oven with the main switch or leave it on standby mode after the work is done.
• Never leave a running oven unattended.
• Always disconnect the electric plug and wait until the oven has cooled before attempting
any maintenance.
• Donotwearloose-ttingclothesorjewelleryastheymaygetcaughtinthemovingpartsoftheoven.
• Always wear appropriate shoes to prevent, to prevent injury caused by moving the oven or hot objects
falling from the oven.
• Workonlyinfulldaylightorwithsufcientarticiallight.
• Donotoperatetheovenwhileundertheinuenceofalcohol,drugsoranyillegalsubstance
Failure to comply with these instructions may result in personal injury.

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DeterminethepropermethodtodisposeofwastefromthelocalofceoftheEnvironmentalProtec-
tion Agency. Recycling centers are established to properly dispose of materials in an environmentally
safe fashion.
WARNING
This oven should only be operated by staff that has read, comprehend
and will respect warnings and instructions regarding this oven in the
owner manual. The parts and service manual is dedicated to authorized
technicians (see section 1.4).
DO NOT SPRAY LIQUIDS OR VAPORS ON, OR NEAR, ELECTRICAL EQUIPMENT.
DO NOT USE THIS APPLIANCE IF ANY OF ITS PARTS HAVE BEEN UNDER WATER.
IMMEDIATELY CONTACT A QUALIFIED SERVICE TECHNICIAN TO INSPECT THE
APPLIANCE AND TO REPLACE ANY PARTS WHICH WERE SPRAYED OR
SUBMERGED UNDER WATER.
1.3 Service

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1.4 Authorized technician
Allinstallationsand/orserviceonanyHotRocksovensmustbeperformedbyqualied,certied,
licensed and/or authorized installers and technical service personnel. All electrical, gas and
plumbing connections must be made by authorized technicians and in compliance with all electrical,
gas, plumbing and safety requirements.
It is possible to obtain these services by contacting Hot Rocks customer service or a local service
company. Refer to the Hot Rocks website for a list.
1.5 Denitions
USER(S)
A user is those who will operate the oven. There are two different levels of users; basic user and
advanced User.
BASIC USER
Basic users are those who will work everyday with the oven to cook pizza. A basic user has been
trained by an advanced user or an authorized technician to safely operate the oven. They can also
perform daily and weekly operator maintenance.
ADVANCED USER
Advanced users are those who received the proper training from the authorized technician to
perform monthly operator maintenances. They can lock cooking parameters from the basic user.
QUALIFIED AND/OR AUTHORIZED TECHNICIAN
QualiedorauthorizedtechniciansareprofessionnalthatareauthorizedbyHotRockstowork
on the oven. The technician must comply with all requirements of state or local authorities having
jurisdiction.
QUALIFIED INSTALLATION PERSONNEL
Qualiedinstallationpersonnelcanberepresentedbyanindividual,arm,acorporationora
company which will perform and is responsible for:
1.The installation of gas piping from the outlet side of the gas meter or service regulator when
 themeterisnotprovided,andtheconnectionandinstallationofthegasappliance.Thequalied
installation technician must be experienced in such work, familiar with all required precautions,
and comply with all requirements of state or local authorities having jurisdiction. Reference in
Canada: Canadian Standard CAN/ CSA-B149.1 and Z223.1 / NFPA 54 (Natural and/or propane
gas installation code)
2.The installation of electrical wiring from the electric meter, main control box or service outlet to the
electricappliance.Thequaliedinstallationtechnicianmustbeexperiencedinsuchwork,familiar
with all required precautions, and comply with all requirements of state or local authorities having
jurisdiction.
3.The appliance, when installed, must properly be electrically grounded in accordance with local
codes.Intheabsenceoflocalcodes,itneedstorespecttheNationalElectricalcodeANSI/NFPA
 70,ortheCanadianElectricalcode,CSA22.1No109orconformtoULSTD197.

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2. OPERATION
2.1 Technician interface
* Note that this is referred as the “main screen.”
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ICON
DISPLAYED DESCRIPTION
Shown during start-up to inform that the oven is rising in temperature to reach the
selected set point. Once the bottom temperature reaches over 250°F for 5 minutes,
the icon will disappear.
Icon shown during the standby mode to cooldown the oven rapidly. Once the bottom
temperature cools under 250°F for 5 minutes, the icon will disappear.
Icon shown when the lubrication of the main conveyor chains is due. Once the lubrication
is done, the icon will disappear.
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User Manual
Icon Displayed
Description
Shown during start-up to inform that the oven is rising in temperature to reach
the selected set point. Once the bottom temperature reaches over 250°F for 5
minutes, the icon will disappear.
Icon shown during the standby mode to cooldown the oven rapidly. Once the
bottom temperature cools under 250°F for 5 minutes, the icon will disappear.
Icon shown when the lubrication of the main conveyor chains is due. Once the
lubrication is done, the icon will disappear.
.
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User Manual
This section provides important information about the state of the oven.
2.1.1 Visual Information

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Labels of all available sections. (access is limited by user)
Default settings do not allow the basic user to modify any of the oven’s parameters. It is possible to
automatically enable the advanced user’s authorizations when the oven is powered on.
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PERMISSIONS BASIC USER ADVANCED USER TECHNICIAN USER
Set Cooking time X1X X
Set Top Temperature X1X X
Set Bottom Temperature X1X X
Set Convection Speed X1X X
Load Recipe X X X
Save Recipe - X X
Access Alarm page X X X
Access User Login Page X X X
Access Statistics page X X X
Access About page X X X
Access Monitoring page X X X
Access Lubrication page - X X
Access Setting page - X X
Access Date & Clock page - X X
Access Maintenance page - X X
Access Conguration page --X
Access Input/Output page --X
2.1.2 Technician Login
1 Authorizations can be granted by the Advanced User. See User Manual.

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1 Authorizations can be granted by the Advanced User. See User Manual.
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User Manual
Technician users can login using the following credentials:
User: 1
Password: 1234
This menu also allows a technician user to change their password or reset it. The technician user can also
log out to be sure that their settings won’t be changed.
After 15 minutes without touching the screen, the technician user will be automatically logged out resetting
rights to those of the basic user.
Opens the login menu.

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2.1.3 Conguration
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Model
Allows to select between three
models of Hot Rocks Oven:
- HR7022
- HR7033
- HR9333
Gas type
Allows to select the type of gas:
- Propane
- Natural Gas
Monitor settings
Opens the monitor settings.

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Conveyor Settings
Shows the conveyor setting page.
This page allows the followings changes:
CONVEYOR DIRECTION
- Left to right
- Right to left
GEARBOX RATIO
- 1000:1 (cooking ratio 2 to 30 min)
- 435: 1 (cooking ratio 1 to 15 min)
Shows the settings of the torque limiter:
Torque Warning
Maximum torque percentage allowed before sending a warning on the user
interface.
Torque Alarm
Maximum torque percentage allowed before sending an alarm on the user
interface.
Nb of sample
The number of cycles the oven will try before sending a warning or alarm.

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Heat Settings
Shows the heat setting menu.
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This menu has three pages as shown bellow.
TherstpageshowsthePIDcontrolsettings.
The second page shows the preheat and cooldown modes. The follow can be adjusted:
Temperature
Thetemperaturetoreachtonishthemode
- 250°F for the preheat mode
- 250°F for the cooldown mode
Delay
Thedelaytheovenneedstoremainatthesettemperaturetonishthemode
- 5 minutes for the preheat mode
- 5 minutes for the cooldown mode
Speed
The cooking time during these modes
- 3 minutes for the preheat mode
- 3 minutes for the cooldown mode
Convection
The fan speed during these modes
- 100% for the preheat mode
- 70% for the cooldown mode

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The third page show the burner parameters.
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Delta Top/Bottom
The max temperature allowed between the top temperature and the bottom temperature.
Max Fire, Reduce Fire, Low Fire
These settings are completed at the factory and will differ between models.

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2.1.4 Input/Output
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Input Check
These squares show which PLC inputs are used. The numbers shown at the start of each input are
related to the PLC “input” pinout.
 I00.1-EMERGENCYSTOP:Testbyengaginganyoftheemergencystopbuttonsontheoven.
I00.2 - PRESSURESWITCH:Testbydisconnectingthepressureswitchcableontherearofthe
oven located next to the gas entry.
I00.3-TEMP.HIGHLIMIT:Thisvaluecomesfromthehighlimitdisplayontherearoftheoven
located next to the gas entry.
I00.4-IGNITIONFEEDBACK:Thisvaluecomesfromtheignitionboxlocatedintheelectrical
  panel;usedtoconrmamedetection.
I00.5 - REVERSEPUSHBUTTON:Testby engaging any of the reverse buttons on the oven.
Thisbuttonopensthecongurationpage.

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Output Test
These squares show which PLC outputs are used. The numbers shown at the start of each output are
related to the PLC “output” pinout.
 Q00.1-BURNER:Thisbuttonteststheburner’sfan.
Q00.2 - IGNITION: This button tests the ignition.
 Q00.3-BUZZER:Thisbuttonteststhebuzzer.
Heat Test
This button opens the heat control menu.
TheTopHeatTestsectiontestsandveriesthedamperposition.Insertapercentagevalueinthe
COMMANDsection,andverifythatthepositioniscorrectlyreachedintheFEEDBACKsection.
The Bottom Heat Test section test the burner’s fan speed. Insert a percentage value in the COMMAND
section, and verify that the speed changes by listening to the blower’s noise increasing or decreasing.
ThereisnoFEEDBACKonthisvalue.

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FV1 Conveyor Test
ThisbuttonopensintotheFV1CONVEYORTESTpage.
FV2 Convection Test
ThisbuttonopensintotheFV1CONVEYORTESTpage.
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InsertaspecichertzintheTARGETboxandverifythat
the drive is sending this information in the ACTUAL box.
DIRECTION changes the direction of the conveyor.
* Note: The change of direction is only for the test,
and does not permanently change the direction
setting.
InsertaspecichertzintheTARGETboxandverify
that the drive is sending this information
in the ACTUAL box.
DIRECTION changes the direction of the conveyor.
* Note: The change of direction is only for the
test. It does not permanently change the direction
setting. JOG FWD will move the stone conveyor
forward and JOG REV will run it backwards.

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Prior to the installation, ensure the following:
• The entrance of the building, all the way to the desired location respects the overall dimensions of
the oven model. See section 2.1 for measurements.
• The oven will not be enclosed, and there is a proper venting hood.
• Theconnectionsrequiredtostarttheovenarealreadyinstalledandveriedtobeworking.
• A minimum of 6 inches of clearance all around the oven.
Refer to the HotRocksspecicationsheet for installation requirements.
3.1 Moving the ovens
3.1.1 Shipping
The Hot Rocksovencanbeshippedintwodifferentcongurationsdependingontheentryway
available to bring the oven in the location. Refer to the specicationsheet available
on the Hot Rocks website for more information.
3.1.2 Oven dimensions
3. INSTALLATION
hotrocksoven.com 855 395-5252 [e-mail]
2

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3.1.3 Oven assembly
The main oven parts are shipped in a crate. Fragile and removable parts are shipped in separate
packaging.
1. Bring all packaging into the location. Lift equipment will be required to move crates.
2.Uncratetherstovendecktheninstalllegsandwheels.
3. If theovenwasshippedvertically,iptheovenontoitswheels.
4. Flip the other oven decks and stack them. A video showing this procedure is available on the
HotRocksOvensYouTubepage. When stacking multiple ovens, silicone must be applied
between each unit to provide a proper sanitary seal.
5. DeterminethepropermethodtodisposeofwastefromthelocalofceoftheEnvironmental
Protection Agency. Recycling centers are established to properly dispose of materials in an
environmentally safe fashion.
3.2 Start-up ovens
Therststart-upoftheovenmustbeperformedbyanauthorizedtechnician.Filltheinstallation
checklist located in the appendix of this document and send the completed copy to the service
department.
3.2.1 Complete the assembly
1. Silicone seal
WARNING
Make sure that the silicone seal is smooth with no bubbles; it must not
allow food particles in between units.