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Self Cleaning Hood System
Installation, Operation, and Maintenance Manual
Save these instructions. This document is the property of the owner of this equipment and is
required for future maintenance. Leave this document with the owner when installation or
service is complete.
RECEIVING AND INSPECTION
Upon receiving unit, check for any interior and exterior damage, and if found, report it
immediately to the carrier. Also check that all accessory items are accounted for and are
damage free.
WARNING!!
Installation of this module should only be performed by a qualified professional who has read
and understands these instructions and is familiar with proper safety precautions. Improper
installation poses serious risk of injury due to electric shock and other potential hazards. Read
this manual thoroughly before installing or servicing this equipment. ALWAYS disconnect
power prior to working on module.
March 2011 Rev. 10
A0019144
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TABLE OF CONTENTS
WARRANTY .................................................................................................................................................. 4
INSTALLATION ............................................................................................................................................. 5
Mechanical ................................................................................................................................................ 5
Plumbing Connections for Self Cleaning .............................................................................................. 5
Piping Loss Calculation for Wall Mount Self Cleaning System ............................................................ 6
Minimum Pressure Requirements for Lengths of Hood ....................................................................... 8
Self Cleaning System Overview ........................................................................................................... 9
Drain Assembly .................................................................................................................................. 11
Electrical ................................................................................................................................................. 12
Copper Wire Ampacity ....................................................................................................................... 12
OPERATION ............................................................................................................................................... 13
Start Up ................................................................................................................................................... 13
Special Tools Required ...................................................................................................................... 13
Start Up Procedure ............................................................................................................................. 13
Start Up Checklists ................................................................................................................................. 15
Self Cleaning Hood Start Up Checklist .............................................................................................. 15
Component Description .......................................................................................................................... 16
Self Cleaning Spray Bar ..................................................................................................................... 16
Water Manifolds .................................................................................................................................. 17
Self Cleaning Manifold ....................................................................................................................... 17
Self Cleaning Manifold Details ........................................................................................................... 18
Self Cleaning Wash Timers ................................................................................................................ 19
Surfactant Tank .................................................................................................................................. 20
Troubleshooting ...................................................................................................................................... 21
Self Cleaning Hood Troubleshooting Chart ........................................................................................ 21
MAINTENANCE .......................................................................................................................................... 22
General Maintenance ............................................................................................................................. 22
Every 3 months ....................................................................................................................................... 22
Every 6 months ....................................................................................................................................... 22
Every 2 Years ......................................................................................................................................... 22
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WARRANTY
This equipment is warranted to be free from defects in materials and workmanship, under normal use and
service, for a period of 12 months from date of shipment. This warranty shall not apply if:
1. The equipment is not installed by a qualified installer per the MANUFACTURER’S installation
instructions shipped with the product,
2. The equipment is not installed in accordance with federal, state and local codes and regulations,
3. The equipment is misused or neglected,
4. The equipment is not operated within its published capacity,
5. The invoice is not paid within the terms of the sales agreement.
The MANUFACTURER shall not be liable for incidental and consequential losses and damages
potentially attributable to malfunctioning equipment. Should any part of the equipment prove to be
defective in material or workmanship within the 12-month warranty period, upon examination by the
MANUFACTURER, such part will be repaired or replaced by MANUFACTURER at no charge. The
BUYER shall pay all labor costs incurred in connection with such repair or replacement. Equipment shall
not be returned without MANUFACTURER’S prior authorization and all returned equipment shall be
shipped by the BUYER, freight prepaid to a destination determined by the MANUFACTURER.
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System Nomenclature
System
Water Connection
W1
1 Hot Water
W2
1 Cold Water
W3
1 Hot, 1 Cold Water
INSTALLATION
Warning
All field connections between hoods and drain lines must be run with Steel, Stainless Steel, or
Copper pipe. Plastic pipe cannot be used for drains or field connections between hoods, as it
could fail and become hazardous.
It is imperative that this unit is installed and operated with the designed airflow and electrical supply in
accordance with this manual. If there are any questions about any items, please call the service
department at 1-866-784-6900 for warranty and technical support issues.
Mechanical
WARNING: APPLY THE APPROPRIATE WATER PRESSURE
AND TEMPERATURE TO ALL FITTINGS TO PREVENT
LEAKAGE AND COMPONENT FAILURE
ATTENTION: SYSTEM MUST BE INSTALLED IN CONDITIONED SPACE BETWEEN 32°F AND 130°F
Ensure there is 36 Inches of service clearance to the front of the panel.
Plumbing Connections for Self Cleaning
Several field plumbing connections are required for proper Self Cleaning hood operation. It is
recommended that all plumbing connections be sealed with Teflon tape or pipe thread sealant. Use care
not to contaminate the interior surfaces of the water lines when plumbing the unit, as small particulate can
clog the orifices of the spray nozzles.
1. All incoming plumbing connections are connected via ¾” quickseals at the top of the utility
cabinet. See Figures 1 and 2 for details.
2. Self Cleaning hoods with the W1 option (Hot Water Wash) require a hot water connection at
140°F to 170°F and 30 to 50 psi operating pressure. If the operating pressure is greater than 50
psi, a water regulator must be connected. Max water static pressure is 125 psi. Typical water
flow rate is 0.7 GPM per foot of hood. The spray lasts for a factory setting of 3 minutes every
time the fans are switched off.
3. Self Cleaning hoods with the W2 option (Constant Cold Water) require an unheated water
connection at an operating pressure of 10 to 20 psi. If the pressure is greater than 40 psi, a water
regulator must be connected. Max water static pressure is 125 psi. Typical water flow rate is 0.4
GPM per foot of hood. The spray runs constantly while the fans are turned on.
4. Self Cleaning hoods with the W3 option (Hot Water Wash and Constant Cold Water) require a hot
water connection at 140°F to 170°F and 30 to 50 psi operating pressure and an unheated water
connection at 10 to 20 psi operating pressure. If the pressure is greater than the max rating, a
water regulator must be connected. Max water static pressure is 125 psi. Typical water flow rate
is 0.4 GPM per foot of hood for cold water and 0.7 GPM per foot of hood for hot water. The cold
spray runs constantly while the fans are turned on and the hot water lasts for a factory setting of 3
minutes every time the fans are switched off.
5. If multiple hoods are arranged in an end-to-end or back-to-back arrangement, plumbing
connecting the hoods must be piped in the field. The plugged end of the spray bar is used to do
this. Remove the plugs on the main hood and the adjacent hood and simply pipe the two
together. The highest part of the connecting pipe must not exceed the height of the vacuum
breaker in the main utility cabinet. See Figure 1A for illustration.
6. There is also a non-pressurized 1-1/2 inch drain connection that must be piped. This allows
water to drain from the hood grease trough. It must be connected to the building grease trap. 30
inch tall hoods will have 2 drains and hoods 10 feet and longer will also have 2 drains. See
Figure 3 for details.
7. Once all supply and drain lines are connected, remove one of the nozzles and flush the lines.
8. The Ansul fire system duct detection bracket and fusible link are shipped loose to be installed in
the exhaust ductwork. The detector must be installed no more than 20 feet from the hood, and
installed per the Ansul fire system guidelines.
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Piping Loss Calculation for Wall Mount Self Cleaning System
Equivalent Pipe Length For Various Pipe Fittings
Pipe Size Inches
45° Elbow
90° Elbow
Tee Thru Run
Tee Thru Branch
3/4"
1.03
2.21
1.23
4.41
1"
1.31
2.81
1.56
5.62
1 ½
2.15
4.31
2.4
8.63
Pressure Drop (PSI) per Equivalent Foot of Waterline - Pipe Size
Gallons per Minute
Waterline Pipe Size (psi per foot of pipe)
3/4”
1”
1 1/2”
10
0.102
0.029
0.004
20
0.368
0.105
0.014
30
0.779
0.222
0.030
40
1.327
0.379
0.052
50
2.005
0.573
0.078
60
2.809
0.803
0.109
70
3.735
1.068
0.146
80
4.782
1.367
0.186
90
5.947
1.700
0.232
100
7.223
2.066
0.282
To ensure proper operation of the Self Cleaning System, a minimum of 30 PSI water operating pressure
during spraying must be achieved at the hood nozzles. For this to occur, proper sizing of the water line is
required. Use the following steps to calculate the piping minimum size.
1. Use the Minimum Pressure Requirements for Lengths of Hood chart and find the Self
Cleaning minimum PSI required at the hood inlet. Subtract this value from the available PSI at
the panel pressure gauge. Maximum panel operating pressure is 50 psi. This will be your
maximum allowable pressure drop for field installed pipes between the panel and the hood.
2. Most fittings add an equivalent pipe length to the total run. Use the chart below to calculate the
equivalent pipe length for installed fittings. If you have multiple fittings of one type, simply multiply
the number below by the total number of the fitting and add to the total run length.
3. To calculate the total flowing pressure drop between the panel and the hood, take the total
equivalent length found in step 2 and add the total linear field installed pipe length. Multiply this
number by the value found in the table below, Pressure Drop (PSI) per Equivalent Foot of
Waterline. (Gallons per minute is calculated by multiplying the length of the hood by 0.7 gpm)
This will be the friction pressure drop between the hood and the panel.
4. Add in the pressure drop due to gravity. This must be evaluated to overcome any rise in pipe
elevation between the panel and the hood. There is .43 psi/ft of vertical rise of pressure drop.
5. Now, compare the maximum allowable pressure drop from step 1 to the calculated pressure drop
from step 3. If the calculated pressure drop exceeds the maximum allowable pressure drop,
increase the pipe size and recalculate steps 2 and 3. Continue this step until the calculated
pressure drop is below the maximum allowable.
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Field Pipe Pressure Drop Calculation Example:
0.01
0.1
1
10
1 10 100 1000
Pressure Loss (PSI/Ft)
FLOW (GPM)
Pressure Loss Water Flow
3/4" pipe
1" Pipe
1 1/2" Pipe
Wall mount panel installed with 30 feet of ¾” linear pipe between panel and hood. (2) 90 degree elbows
are installed in the pipe run and the pipe run has a vertical rise of 5 feet. Length of end-to-en hood
system is 32 feet.
Hood System = 32 feet. Flow rate = 32 feet * 0.7 gpm = 23 gpm
Pressure required at hood = 45 psi.
Pressure at panel gauge = 50 psi.
Allowable pressure drop between panel and hoods: 50 psi – 45 psi = 5 psi
Equivalennt length of pipe = 30 + 2 * 2.21 = 34.42 feet
Friction Pressure Drop through pipe = 34.42 * 0.779 = 26.81 psi
Gravitational Pressure = 0.43 psi/ft * 5 feet = 2.15 psi
Total Pressure Drop in Field Pipe between panel and hood = 26.81 psi + 2.15 psi = 28.96 psi
Allowable pressure drop = 5 psi
This system will not work correctly because calculated pressure drop is greater then allowable
pressure drop. Pipe size will need to be change to 1-1/2 inch diameter.
Re-calculate with 1-1/2 inch pipe instead of ¾” pipe:
Equivalennt length of pipe = 30 + 2 * 4.31 = 38.62 feet
Friction Pressure Drop through pipe = 38.62 * 0.030 = 1.15 psi
Gravitational Pressure = 0.43 psi/ft * 5 feet = 2.15 psi
Total Pressure Drop in Field Pipe between panel and hood = 1.15 psi + 2.15 psi = 3.30 psi
Allowable pressure drop = 5 psi
This system will work correctly because calculated pressure drop is less then allowable pressure
drop.
Pressure Loss Through Typical Water Pipe Chart
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Minimum Pressure Requirements for Lengths of Hood
Length of Hood
(Ft)
Minimum Inlet Water
Pressure for Cold
Mist (PSI)
Minimum Inlet Water
Pressure for Self
Cleaning (PSI)
0
10
30 4 10
30 8 10
30
12
10
30
16
15
30
20
15
31
24
15
32
28
15
34
32
20
37
36
20
39
40
20
42
44
20
46
48
20
50
Table 1
Note: Water pressure may not drop below 30 PSI while the hood hot water is operating. Pressure
may not rise above 50 PSI when the hood is spraying. If the pressure is greater than 50 PSI, a
water regulator must be connected. The chart above is for continuous hood installations. If the
above length is exceeded, water line must be branched for adequate water supply.
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Self Cleaning System Overview
Figure 1A
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Figure 2
Self Cleaning Hood Top and Bottom View
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Drain Assembly
Figure 3
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Copper Wire Ampacity
Wire Size AWG
Maximum Amps
14
15
12
20
10
30 8 50 6 65 4 85
Electrical
WARNING!!
Disconnect power before
installing or servicing control.
High voltage electrical input is
needed for this equipment. A
qualified electrician should
perform this work.
Before connecting power to the control, read and
understand the entire section of this document. As-built
wiring diagrams are furnished with each control by the
factory, and are attached either to the door of the unit or
provided with the paperwork packet.
Electrical wiring and connections should be done in
accordance with local ordinances and the National
Electric Code, ANSI/NFPA70. Be sure the voltage and
phase of the power supply and the wire amperage
capacity is in accordance with the unit nameplate.
1. Always disconnect power before working on or near
this equipment. Lock and tag the disconnect switch or
breaker to prevent accidental power up.
2. There are multiple electrical connections required
for this control. 120VAC should be wired to terminals
H1 and N1. If the hood is equipped with a separate
light circuit, 120VAC should power it per the as-built
schematic. Fan wiring connections should be made
per the schematic. H1 and N1 should not be
connected to a shunt trip breaker.
3. Make certain that the power source is compatible with the requirements of your equipment. The
system wiring schematic identifies the proper phase and voltage of the equipment.
4. Before connecting control to power source, verify power line wiring is de-energized.
5. Secure the power cable to prevent contact with sharp objects.
6. Do not kink power cable and never allow the cable to come in contact with oil, grease, hot
surfaces or chemicals.
7. The hood lights wiring will also need to be wired to terminals “B” and “W”. Verify connections on
wiring schematic.
8. Before powering up the system, make sure that the interior of the control is free of loose debris or
shipping materials.
9. If 3 phase motors are spinning in the incorrect direction, switch any two wires on the
output of the motor starter. Rewire single phase motors per the motor schematic to
change direction.
10. If any of the original internal wire supplied with the system must be replaced, it must be replaced
with type THHN wire or equivalent.
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OPERATION
Figure 4
Prior to starting up or operating the system, check all fasteners for tightness. Ensure that the wiring is
installed properly and that all nozzles and panels are installed.
The Self Cleaning hood is designed to use hot water to wash the hood plenum and immediate duct
section every time the fan switch is switched from the “ON” position on the main control panel. When the
switching action occurs, hot water sprays along the entire length of the hood and towards the back of the
hood for a factory setting of 3 minutes. During this time, surfactant is injected into the water stream for a
duration of 1 second for each minute of wash time. Once the wash cycle is complete, water stops
spraying and the hood filters are to be removed and cleaned.
If the hood is ordered with a cold water mist option, cold water sprays continuously during the cooking
process. Cold water stops spraying when the fan switch is switched from the “ON” position.
Start Up
Special Tools Required
AC Voltage Meter
Standard Hand Tools
Hand-held Propane Torch
Start Up Procedure
1. Check all nozzles to make sure they are installed and tight.
2. Install all hood filters per the filter installation configuration chart below. There are drip blanks
secured to the filters to prevent water from exiting the hood between the filters.
3. Open all water valves to the hood.
4. Fill surfactant tank with surfactant. The “Add Surfactant” light should not be on. Prime the
surfactant pump with the push-button on the face of the electrical control package.
5. There are 2 timers that control the spray and the surfactant injection. The wash timer is set to 3
minutes from the factory. The surfactant timer is factory set for 1 second of injection during each
minute of wash time. The injection occurs at the start of each minute. The timer settings should
be verified. (See section “Self Cleaning Timers for information)
6. Turn the hood fan switch to the “ON” position. Fans should operate. If
they do not, check wiring. If the hood has the cold water mist option,
cold water should begin to spray.
7. To operate the wash cycle, simply turn the fan switch off. The wash
cycle energizes automatically and will remain on for the duration of the
wash timer setting.
8. Verify that surfactant is being injected properly into the water stream.
9. Verify the pressure and temperature of the water via the
pressure/temperature gauge. See Figure 4 for a picture of the gauge.
Self Cleaning pressure should be between 30 and 50 PSI operating
pressure, and Cold Mist operating pressure should be between 10 and
20 PSI.
10. Check all manifold pipe connections to ensure there are no water leaks.
11. Check all filters to make sure that no water is leaking back through the filters.
12. Verify that the hood grease trough is draining properly and there are no clogs in the drain.
Surfactant (Part Number WWDETER for
4 Gallons, WWDETER-1G for 1 Gallon)
Filter Installation Configuration
The hood filters have drip blanks attached to them to prevent water leakage through the filters. The chart
below shows the location of the drip blanks and the last filter to be installed into the hood. See Figure 5
below for details.
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Figure 5
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Start Up Checklists
Action
Completed (Yes/No)
Result
Check All Nozzles for Tightness
Open all Valves to Hood
Fill Surfactant Tank
Prime Surfactant Pump
Set All Timers
Check Fan Operation
Operate Wash Cycle
Verify Surfactant Pump Operation
Verify Operating Hot Water Pressure (30-50 PSI)
Verify Operating Cold Water Pressure (10-20 PSI)
Verify Max Water Static Pressure (125 PSI)
Verify Hot Water Temperature
Check For Leaks in Manifold
Check For Leaks through Filters
Verify that Water is Draining Properly
Self Cleaning Hood Start Up Checklist
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Component Description
Figure 6
The following section lists the major controls and components used in the Self Cleaning hood.
Self Cleaning Spray Bar
The Self Cleaning hood contains a spray bar that extends the entire length of the hood immediately
behind the filters in the hood. The bar is ¾” brass fittings with nozzles that spray directly toward the back
of the hood. The same spray bar is used in hot water wash and cold water mist. Water enters the spray
bar via a ¾” quickseal. The other end of the spray bar is plugged. If hoods are installed back-to-back or
end-to-end, the plugged end of the spray bar can be un-plugged and connected to the next spray bar.
See Figure 6 below for details.
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Water Manifolds
Figure 7
There are several versions of manifold configurations. The Self Cleaning with hot water wash (W1) has
one hot water connection. The cold water mist (W2) has one cold water connection. The hot water wash
with cold water mist (W3) has one hot water and one cold water connection.
Self Cleaning Manifold
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Self Cleaning Manifold Details
Figure 8
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Self Cleaning Wash Timers
The Self Cleaning option includes two timers that ship in the main control panel. These
timers control the wash cycle length and the surfactant injection.
The timer shown to the right is the wash cycle timer. The wash cycle timer is a fleeting off
timer and is triggered by turning the fan switch to the “OFF” position. The time is factory set
to 3 minutes but is adjustable on an application specific basis. It has a range of .5 to 10
minutes and is adjusted by simply rotating the large red dial.
The time shown on the right is the surfactant injection timer. The surfactant timer is an
asynchronous on-off timer. This means that it cycles contacts on and off for adjustable time
ranges. The timer is factory set to inject surfactant for 1 second and every minute. The
interval time (time when not injecting) is set by the top two dials. The small top dial on the
timer allows main unit adjustments. This dial can be set to 1, 3, 10, or 60 seconds (s),
minutes (m), or hours (h). Once the small top dial is set, the top, large red dial adjusts the
percentage of the middle dial. For example, if the small top dial is set to 1 minute, and the
large red dial is set to 1.0, the selected time period would result in 1 (1 minute * 1.0 = 1
minute) minute. The large dial is a percentage of the small dial.
The surfactant injection time is set by the bottom two dials. The small bottom dial on the
timer allows main unit adjustments. This dial can be set to 1, 3, 10, or 60 seconds (s),
minutes (m), or hours (h). Once the small bottom dial is set, the bottom, large red dial
adjusts the percentage of the middle dial. For example, if the small bottom dial is set to 1
second and the large red dial is set to 1.0, the selected time period would result in 1 (1
second * 1.0 = 1 second) second. The large dial is a percentage of the small dial.
The red switch on the right side of the face of the timer should not be adjusted and is factory
set to the bottom position (beginning of time period). The pictures shown illustrate the
factory settings of the timers.
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Surfactant Tank
The surfactant tank contains a liquid level control which energizes when the tank is completely empty. In
the event that the low level sensor is activated, an “Add Surfactant” light will illuminate on the control
panel. To reset light, simply fill the surfactant tank with surfactant. Figure 9 below shows tank details.
NOTE: SC-5 surfactant from 20/10 Products Incorporated must be used.
Figure 9
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Troubleshooting
Problem
Potential Cause
Corrective Action
Plenum not being cleaned
No Water Pressure
Verify Hot Water Pressure >30 PSI
Open Manual Valve if closed
Clogged nozzles
Clean or replace nozzles or strainer
Timer Settings improperly set
Wash timer should be set for
approximately 3 minutes
No water pressure
Turn main building water valve on
Nozzle spray pattern incorrect
Nozzles must be pointed toward
back of plenum
No Surfactant
Add Surfactant
Leaking Manifold Pipes
Pipes not tight or sealed
Reseal and tighten pipes
Water Leaking from Vacuum
Breaker
Riser nozzle installed too high
Verify that vacuum breaker is
installed higher than all downstream
piping components
Add Surfactant Light On
Low Surfactant Level
Add Surfactant
Water leaks out of Filters
Filters have gaps between them
Add Filter Drip Blanks or reorient
filters
Water Overflows Grease
Trough
Clogged Drain
Clean Drain or grease trap
Wrong Filters Installed
Install Proper Filters per
Manufacturer
Water Pressure Too High
Water Pressure should be 70 PSI
max
Wash Timer Set Too Long
Reduce Wash Time
Nozzles are Loose
Tighten Nozzles
Filters are Clogged with Grease
Clean Filters
The following table lists causes and corrective actions for possible problems with Self Cleaning hoods.
Review this list prior to consulting manufacturer.
Self Cleaning Hood Troubleshooting Chart
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MAINTENANCE
To guarantee trouble free operation of this system, the manufacturer suggests following these guidelines.
Most problems associated with unit failures are directly related to poor service and maintenance. Record
any maintenance or service performed on this equipment in the documentation section located at the end
of this manual.
General Maintenance
1. Hood filters must be maintained on a daily basis to ensure proper airflow and grease extraction.
2. All water connections must be verified for tightness and leak-free operation.
3. The “Add Surfactant” indicating light will illuminate when the surfactant tank is empty. Surfactant
must be added immediately to guarantee proper cleaning of the hood plenum and duct
connection. .
Every 3 months
1. Clean all duct sensors in hood duct connections (if equipped).
2. Check all nozzles for proper and evenly distributed water flow. If nozzles are clogged, clean or
replace.
3. Check drain(s) on hood to verify there is no blockage. Improper drainage could cause hood leaks
or water to back up into trough and overflow onto appliances.
Every 6 months
1. Inspect hood plenum and wipe down any areas not being cleaned by the self-cleaning system.
There may be an area where the water spray does not directly contact the metal.
2. Inspect the surfactant pump for proper operation and ensure liquid level sensor in surfactant tank
is operational. Test by manually lowering the sensor to see if the “Add Surfactant” light
illuminates.
3. All nozzle strainers should be removed and cleaned. Nozzles must be re-installed tightly.
4. Fill surfactant tank with surfactant. Verify that liquid level sensor operates correctly.
5. The main line strainer in the manifold must be cleaned.
6. Verify that system has proper water pressure and temperature per the labels on the unit.
Every 2 Years
1. Inspect condition of all wires and plumbing. Plumbing should be free of corrosion and wire
insulation must be in good condition.
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START-UP AND MEASUREMENTS SHOULD BE PERFORMED AFTER THE SYSTEM HAS BEEN
Job Name
Service Company
Address
Address
City
City
State
State
Zip
Zip Phone Number
Phone Number
Fax Number
Fax Number
Contact
Contact
Purchase Date
Start-Up Date
Name Plate and Unit Information
Field Measured Information
Hood Model Number
Input Voltage
Serial Number
Check All Nozzles for Tightness
Volts
Open all Valves to Hood
Hertz
Fill Surfactant Tank
Phase
Set All Timers
Check Fan Operation
Operate Wash Cycle
Verify Surfactant Pump Operation
Verify Operating Hot Water Pressure (30-50 PSI)
Verify Operating Cold Water Pressure (10-20 PSI)
Verify Max Water Static Pressure (125 PSI)
Verify Water Temperature
Check For Leaks in Manifold
Check For Leaks through Filters
Verify that Water is Draining Properly
INSTALLED (Warranty will be void without completion of this form)
Job Information
Self Cleaning Hood Information
Refer to the start-up procedure in this manual to complete this section.
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Maintenance Record
Date
Service Performed
Factory Service Department
Phone: 1-866-784-6900
Fax: 1-919-554-9374
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