Accurex Auto Scrubber Operator’s Manual

Document 481488

Auto Scrubber

Auto-Cleaning Hood

Installation, Operation and Maintenance Manual

Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.

Unpacking

Verify that all required parts and the correct quantity
of each item have been received. If any items are
missing, report shortages to your local representative
to arrange for obtaining missing parts. Sometimes it

General Safety Information

Only qualified personnel should install this system.
Personnel should have a clear understanding of these
instructions and all applicable local and national building
and fire codes. Personnel should be aware of general
safety precautions. SMACNA guidelines should be
followed for hanging and supporting the hood. If more
information is needed, contact a licensed professional
engineer before moving forward.

DANGER

Always disconnect power before working on or near a
unit. Lock and tag the disconnect switch or breaker to
prevent accidental power up.

NOTE

Follow all local electrical, plumbing and safety codes,
as well as the National Electrical Code (NEC) and the
latest edition of the National Fire Protection Agency
Standard for Ventilation Control and Fire Protection of
Commercial Cooking Operations, (NFPA 96). Follow
the Canadian Electrical Code (CEC) and ULC-S650 if
installing this product in Canada.

Receiving

Upon receiving the product, check to ensure all items
are accounted for by referencing the delivery receipt or
packing list. Inspect each crate or carton for shipping
damage before accepting delivery. Alert the carrier
of any damage detected. The customer will make
a notation of damage (or shortage of items) on the
delivery receipt and all copies of the bill of lading which
is countersigned by the delivering carrier. If damaged,
immediately contact your Accurex Representative. Any
physical damage to the unit after acceptance is not the
responsibility of Accurex, LLC.

is not possible that all items for the unit be shipped
together due to availability of transportation and truck
space. Confirmation of shipment(s) must be limited
to only items on the bill of lading. Filters are shipped
on a separate skid in their original packaging. Do not
remove factory packaging or install filters until just prior
to commissioning. Remove all other shipping/packing
materials.

Handling

Units are to be rigged and moved by the lifting brackets
provided or by the skid when a forklift is used. Location
of brackets varies by model and size. Handle in such
a manner as to keep from scratching or denting.
Damaged finish may reduce ability of unit to resist
corrosion.

Storage

Units are protected against damage during shipment. If
the unit cannot be installed and operated immediately,
precautions need to be taken to prevent deterioration of
the unit during storage. The user assumes responsibility
of the unit and accessories while in storage. The
manufacturer will not be responsible for damage during
storage.

The ideal environment for storage of the hood and
accessories is indoors, above grade in a clean, dry
atmosphere that is sealed from the elements. While in
storage, inspect equipment routinely. If any moisture,
dirt or other accumulations are found on the hood or
any of the parts, the source should be located and
eliminated.

Removing from Storage

As equipment is removed from storage to be installed
in their final location, it should be protected and
maintained as outlined in the Handling section above.

Auto Scrubber 1

Table of Contents

Auto Scrubber Hood Function

General Safety Information . . . . . . . . . . . . . . 1

Receiving/Unpacking/Handling . . . . . . . . . . . 1

Storage/Removing from Storage . . . . . . . . . . 1

Auto Scrubber Hood Function . . . . . . . . . . . . . 2

System Components

Hood. . . . . . . . . . . . . . . . . . . . . . . . . 3

Auto Scrubber Control Panel . . . . . . . . . . . . 3

Backflow Preventer . . . . . . . . . . . . . . . . . 3

User Interface . . . . . . . . . . . . . . . . . . . . 3

Hood Weights . . . . . . . . . . . . . . . . . . . . . 3

Supply Plenum Weights and Dimensions . . . . . . . 4

Prior to Installation . . . . . . . . . . . . . . . . . . . 5

Unpacking . . . . . . . . . . . . . . . . . . . . . . . 5

Hood Installation Overview . . . . . . . . . . . . . 6-7

Filler Panel Installation . . . . . . . . . . . . . . . . . 7

Clearance Reduction Method . . . . . . . . . . . . 7-8

Top Clearance Reduction Options . . . . . . . . . 7

Back and Front Clearance Reduction Options . . . 8

End Clearance Reduction Method . . . . . . . . . 8

Installing Duct Collars

Exhaust Duct Collars . . . . . . . . . . . . . . . . 8

Supply Duct Collars to the Plenum . . . . . . . . . 8

Installing Back Supply Plenum . . . . . . . . . . . . 9

Ductwork

Exhaust/Supply . . . . . . . . . . . . . . . . . . . 9

Continuous Capture Plenum Hoods . . . . . . . . . . 9

Installing Front/Side External Supply Plenums . . . .10

Uni-Strut . . . . . . . . . . . . . . . . . . . . . . .10

Hanger Brackets and Threaded Rod . . . . . . . .10

Supply Duct Collar . . . . . . . . . . . . . . . . .10

Installing Backsplash / Side Splash Panels . . . . . .11

Installing End Skirts . . . . . . . . . . . . . . . . . .12

Plumbing

Connections . . . . . . . . . . . . . . . . . . . . .13

Detergent Tank Installation . . . . . . . . . . . . .13

Detergent Requirements . . . . . . . . . . . . . .13

Preventative Maintenance . . . . . . . . . . . . . .13

Typical Plumbing Connection Layout . . . . . . . .14

Electrical Connections

Wiring . . . . . . . . . . . . . . . . . . . . . .15-16

Typical Electrical Connection Layout . . . . . . . .17

Installing Ceiling Enclosure Panels . . . . . . . . . .18

Double Island Canopy Style Hoods . . . . . . . . . .18

Initial System Start-Up . . . . . . . . . . . . . . . . .19

System Operation

Fan Operation . . . . . . . . . . . . . . . . . . . .19

Hood Light Operation . . . . . . . . . . . . . . . .19

Wash Operation . . . . . . . . . . . . . . . . . . .20

Wash Sequence of Operation . . . . . . . . . . . 21-22

Airflow Testing Procedure . . . . . . . . . . . . . . .23

Additional Wiring Schematics

Ansul® and Amerex® Wiring Plan View . . . . . .24

Maintenance

Filters and Capture Tank . . . . . . . . . . . . . .25

Auto Scrubber Start-Up Checklist . . . . . . . . . . .26

Troubleshooting . . . . . . . . . . . . . . . . . . 27-29

Replacement Parts. . . . . . . . . . . . . . . . . . .30

Maintenance Log. . . . . . . . . . . . . . . . . . . .31

Our Commitment. . . . . . . . . . . . . . . Backcover

Accurex’s Auto Scrubber hoods are designed for three
primary functions:

• Capture and contain the effluent produced by the
cooking process.

• Remove grease and other contaminants from the
airstream with either one or multiple stages of
mechanical filters.

• Wash the filters and other surfaces within the exhaust
plenum to remove contaminants.

NOTE

The wash sequence of the hood is not designed for
fire suppression and will not engage in the event of
afire.

NOTE

For information on the complete wash cycle, please
refer to the Wash Sequence of Operation, pages 21
and 22.

Auto Scrubber2

System Components Hood Weights

Hood

The hood is shipped from the factory pre-piped and
ready to install. All wash components within the hood
are complete and ready for connection to hot water,
sanitary sewer drain and the electrical sources. If the
Auto Scrubber Control Panel is mounted on the hood,
wiring from the control panel to the hood lights, valves
and sensors is completed by Accurex. All field plumbing
and wiring must conform to plumbing and electrical
codes.

Auto Scrubber Control Panel (ASCP)

The control cabinet contains the water and electrical
components, including the Programmable Logic
Controller (PLC), that controls
the wash sequencing and
operations. The control
cabinet also includes the
detergent reservoir, detergent
pump, and other water piping.

NOTE

Filters are shipped loose with the hood and installed
in the field. To install the filters, perform the sequence
of steps outlined on page 25 in reverse.

Backflow Preventer

A backflow preventer will be shipped loose with the
ASCP and will need to be installed in-line with the hot
water supply to the ASCP to prevent detergent from
back-feeding into the building water supply. Plumbing
instructions begin on page 13.

Hood Weights

Hood Width

inches (cm)

48

(121.92)

51

(129.54)

54

(137.16)

57

(144.78)

60

(152.40)

63

(160.02)

66

(167.64)

69

(175.26)

72

(182.88)

4 feet

lbs. (kg)

244

(110.7)

250

(113.4)

256

(116.1)

262

(118.8)

268

(121.6)

274

(124.3)

280

(127.0)

286

(129.7)

292

(132.4)

Length

8 feet

lbs. (kg)

398

(135.2)

404

(183.3)

410

(186.0)

416

(188.7)

422

(191.4)

428

(194.1)

434

(196.9)

440

(199.6)

446

(202.3)

12 feet

lbs. (kg)

553

(250.8)

559

(253.6)

565

(256.3)

571

(259.0)

577

(261.7)

583

(264.4)

594

(269.4)

600

(272.2)

606

(274.9)

CAUTION

To ensure proper structural support, all hanger
brackets must be used for hanging the hood.

16 feet

lbs. (kg)

707

(320.7)

713

(323.4)

719

(326.1)

725

(328.9)

731

(331.6)

737

(334.3)

743

(337.0)

749

(339.7)

755

(342.5)

User Interface

The user interface will be either a keypad with LCD
screen or touch screen. It can be mounted on the Auto
Scrubber control cabinet, hood or shipped loose for
remote mounting. It will provide a WASH button (WASH
ON/OFF with touch screen), and a means of turning
on/off hood fans and lights, if applicable. It also includes
system alarm notifications to alert of any faults on the
system, such as a low detergent alarm.

SYSTEM FAULT

MENU

NAV

Keypad Touch Screen

NOTE

For detailed information on the Auto Scrubber Control
Panel (ASCP), please refer to the Accurex website,
www.accurex.com

Auto Scrubber 3

Supply Plenum Weights and Dimensions

External Supply

Plenum Type

Air Curtain Supply (ASP)

Split Air Curtain Supply
(Split ASP)

lbs/ft kg/m in. mm in. mm ft. m

Refer to Air Curtain

Supply Plenum

Weight Table

15.5 23.07 24 609.6 10 254.0 3 to 16 .91 to 4.88

Weight Width Height Length per section

Refer Air Curtain

Supply Plenum

Weight Table

10 to 24 254.0 to 609.6 10 254.0 3 to 16 .91 to 4.88

Back Supply (BSP) 35.0 52.09 6 152.4 Variable Variable 3 to 16 .91 to 4.88

Horizontal Supply (HSP) 14.0 20.83 12 304.8 18 457.2 3 to 16 .91 to 4.88

Variable Supply (VSP) 16.0 23.81 12 304.8 18 457.2 3 to 16 .91 to 4.88

Weight

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Air Curtain Supply Plenum Width (inches)

lbs/ft 8.3 8.6 8.9 9.2 9.5 9.8 10.1 10.4 10.7 11.1 11.3 11.6 11.9 12.2 12.5

kg/m 12.35 12.80 13.24 13.69 14.14 14.58 15.03 15.48 15.92 16.52 16.82 17.26 17.71 18.16 18.60

Auto Scrubber4

Prior to Installation

Unpacking

Prior to installation, check with the Authorities Having
Jurisdiction (AHJ) on clearance requirements to
structures surrounding the hood and other equipment.
Verify there is enough space to safely lift the hood up
into its operating position and enough clearance around
the hood for components like fire system connections,
hood lights, hood control components, plumbing
connections, etc. Consider access for servicing the
equipment and the different components when locating
the hood.

The UL label located on the end panel on the inside of
the hood will provide pertinent information regarding the
hood installation. Information includes:

• Allowable cooking surface temperatures of the
cooking equipment

• Front and side overhang requirements

• Minimum exhaust airflow requirements

• Hood lights load information and restrictions

• Filter information

• Fire damper fusible link replacement information, if
applicable

Carefully remove the top of the crate and set aside all
accessories in the crate such as backsplash panels,
control packages, and boxes with loose parts. When
removing the hood from the crate, place protective
material on the floor next to the crate to avoid damaging
the hood.

Lift the hood only by utilizing the hanger brackets. Make
sure the hood weight is evenly distributed. Slowly lift
the hood out of the crate and place on the protective
material.

NOTE

If using straps, the straps should not interfere with
plumbing on the top of the hood in an effort to prevent
internal piping damage which could cause future
leaks.

Top of Hood

Pallet

Protective Material

Auto Scrubber 5

Hood Installation Overview

It is recommended that the protective plastic sheeting
remain on the hood until fully installed to better protect
the product from scratching and marking. Once
removed, use stainless steel polish, such as BlueAway
or equivalent, to clean the hood and/or remove marks
or discoloration. Be sure to wipe with the grain and not
against it.

1. If the hood is provided with filler panels, shipped
loose, install them now. See page 7, Filler Panel
Installation. Filler panels may be integral to the
hood, which requires no additional installation.

2. If the hood is equipped with Clearance Reduction
Methods, refer to pages 7 and 8 for special
considerations with hanging the hood.

3. If the hood is provided with hood/duct sensors or
thermostats that were shipped loose, install them
now. See the Installation and Operations guide
provided with the control panel.

4. If the hood was provided with either exhaust
collars or supply collars that have shipped loose,
it is recommended that the exhaust and supply
openings are cut and collars are attached now,
prior to hanging the hood. See Installing Duct
Collars on page 8.

5 If the hood is provided with a back supply plenum

(BSP) install it now. See page 9, Installing the Back
Supply Plenum.

6. If possible, connect (weld) exhaust duct to the
hood while on the floor, unless it prohibits the hood
from being raised into place. For information on
ductwork, see page 9, Ductwork.

7. At this point, drill holes in the building structural
support system or utilize uni-strut to match up with
the hanger bracket holes. Then slowly and evenly
raise the hood into position and insert 1/2-inch
(12.7mm) diameter threaded rod (provided by
others) between the hanger brackets and structure.

The hood hanging height requirements are given on

the UL label. Typical canopy hood hanging height
will be 80inches (198.12cm) off the finished floor.

NOTE

If the hood is supplied with ceiling enclosure panels,
the height of the enclosures will typically be the
distance from the ceiling to the top of the hood. Use
this dimension to find the hood’s hanging height off of
the floor.

For questions regarding the supporting structure and
its integrity, either the contractor or structural engineer
needs to be consulted.

NOTE

All hanger brackets MUST be used and the hood must
be properly supported while lifting to prevent damage
or distortion to the hood.

NOTE

Ensure the hood is hung evenly to prevent drainage
problems. Provide adequate support so that the hood
does not move in a manner that is unacceptable to
the Authorities Having Jurisdiction (AHJ).

WARNING

When mounting the hood or any components against
the hood, never puncture or drill into the canopy
unless otherwise instructed in this manual. Doing so
will void the hood listing and warranty.

8. If the hood was provided in sections with the
continuous capture option, once each hood
section is hung, install this option now. See page 9,
Continuous Capture Plenum Hoods.

9. If the hood was provided with any front or side
external supply plenums (other than the back
supply plenum), install these now. See page 10,
Installing Front/Side External Supply Plenums.

10. Install the remainder of both the exhaust and
supply ductwork. For further guidelines see page 9,
Ductwork.

11. If the hood is provided with any backsplash/
sidesplash panels, install them now. See page 11,
Installing Backsplash Panels.

12. If the hood is provided with any end skirts, install
them now. See page 12, Installing End Skirts.

13. This is a Type I hood and it requires a fire
suppression system. Once the hood(s) and
ductwork are fully installed, appliance(s) are in
place and walls are complete, the fire system
should be completed.

If the hood is provided with a full factory-

coordinated fire suppression system installation,
the certified fire system installer should be
contacted at this time to complete the final
hookups, testing and system certification based
upon manufacturer’s specification and local fire
codes.

If the hood is equipped with pre-piping only, and/

or does not include fire suppression, it is the
responsibility of a certified fire system installer
to install, test and certify the system based upon
manufacturer’s specification and local fire codes.

14. The Auto Scrubber Control Panel (ASCP), if
shipped loose, will need to be installed at this time.
Once mounted, plumbing and electrical wiring
will need to be completed by the jobsite plumber
and electrician. Typical site wiring responsibilities
include wiring hood temperature sensors, hood
lights, hood sequencing valves, fire suppression
micro-switches, and fans (if applicable) to the
control panel. Hood plumbing details are given on
page 13-14, and hood electrical wiring details are
provided on page 15-17.

Auto Scrubber6

Hood Installation Overview, continued

Clearance Reduction Methods

15. If the hood is provided with enclosure panels,
install them now. See page 18, Installing Enclosure
Panels.

16. Install the rest of the hood accessories provided.
This may include grease filters or condensate
hood baffles, grease cups, light bulbs (provided by
others unless LED tube style), light globes, and trim
strips.

Filler Panel Installation

1. Uncrate the hood and lay it on the floor with

protective material between the hood and the floor.

2. Bolt the filler panels together with 5/16 in. bolts

provided in the hardware package.

3. Position the filler panels to the hood back, and tack-

weld them into place.

HOOD

Clearance reduction methods have been evaluated and
tested and are listed by UL (Underwriters Laboratory).
The method of test was derived from the UL 710 test
standard.

The hood may be installed with zero clearance to
combustible materials if constructed in the following
manner.

1. One inch (2.54 cm) thick layer of insulation of Owens
Corning

®

Type 475, Johns Manville Type 475, IIG®
MinWool-1200® Flexible Batt, or Knauf Insulation
Type EI 475.

2. Insulation must be held securely in place. Pins that
are welded or secured with an adhesive may be
used.

3. A backsplash panel must be attached to the wall
(insulated or uninsulated).

To comply with the UL Listing, the cooking appliances
must be as follows:

• Maximum surface temperature is 700°F (371°C)

• Appliances are located at least 3 in. (7.62 cm) from
the rear wall

• Appliances are at least 40 in. (101.6 cm) below the
bottom front edge of the hood

The hood may be installed with 3 in. (7.62 cm) clearance
to limited combustible materials per NFPA 96 if
constructed in one of the following methods:

• 3 in. (7.62 cm) rear uninsulated stand-off

• 3 in. (7.62 cm) top enclosure panel system

• 3 in. (7.62 cm) end uninsulated stand-off

Top Clearance Reduction Options

One inch (2.54 cm) layer of insulation installed on top
of the hood (optional) meets zero inch requirements for
clearance to combustible surfaces as outlined under the
clearance reductions methods.

HOOD

HOOD

TACK-WELDED TO
HOOD BACK

5/16 IN. X 3/4 IN. BOLTS
WITH WASHERS & NUTS

RIGHT FILLER PANEL

BOTTOM FILLER PANEL

4. To allow for ease of cleaning, caulk the external
seams with NSF Approved silicone caulk (GE
SCS1009, or its equivalent). The caulk is not
provided.

Three inches (7.62cm) uninsulated airspace installed on
top of hood (optional) meets NFPA 96 requirements for
clearance to limited combustible surfaces.

Auto Scrubber 7

Back and Front Clearance
Reduction Options

One inch (2.54 cm) layer of insulation in 3 in. (7.62cm)
back stand-off meets zero inch requirements for
clearance to combustible surfaces as outlined under the
clearance reduction methods.

Three inches (7.62 cm) uninsulated back stand-off
meets NFPA 96 requirements for clearance to limited
combustible surfaces.

One inch (2.54 cm) layer of insulation factory-installed
on the front of the hood (optional) meets zero inch
requirements for clearance to combustible surfaces.

Installing Duct Collars

Exhaust Duct Collars

1. The exhaust duct connection needs to be located
within 48 in. (121.92 cm) from the center of the hood
length to the center of the duct connection and
within shaded area as shown.

Top View of the Hood

8 in.

Hanger Bracket

Exhaust Plenum

Duct cut out area

8 in.

14 in.

3 in.

Hood
Width

End Clearance Reduction Options

One inch (2.54 cm) layer of insulation factory-installed
on the end of the hood (optional) meets zero inch
requirements for clearance to combustible surfaces
under the clearance reduction methods.

Three inches (7.62 cm) uninsulated airspace installed on
end of hood (optional). Meets NFPA 96 requirements for
clearance to limited combustible surfaces.

Hood Length

Front of hood

NOTE

An 8x8x4-inch enclosure and sequencing solenoid
valves will be mounted on top of the Auto Scrubber
hood near the right or left-hand side. Avoid
interference with these items by keeping the exhaust
collars 20 inches from the end of the hood where
these components are mounted.

2. The exhaust duct connection is to be a continuous
liquid-tight weld. Weld with a non-ferrous filler wire,
such as silicon bronze or stainless steel filler wire.
Protect all stainless steel areas from weld splatter.

Supply Duct Collars to the Plenum

Place the duct collar(s) over the opening, fastening
with tack-welds at 1 to 2 in. (2.54 to 5.08 cm) intervals,
or sheet metal screws at 3 to 6 in. (7.62 to 15.24 cm)
intervals.

3 in.

Auto Scrubber8

Installing the Back Supply Plenum

BOLT OR WELD

HOOD TOP

HOOD END

SUPPORT ANGLES

CAULK

BOLT

U-CLIP

HOOD

ACORN
NUT

2. RAIS
AND

3. FAST

4. FAST

5. CAU

& CAP

1. REM

HOOD FRONT

HOOD FRONT

REMOVE
SUPPORT
ANGLES ON
THE OPEN
END PANEL

Ductwork

Install the Supply Duct Collar

1. Find the center of the back supply plenum.

2. If the back supply plenum is to have
one opening, cut the opening such
that it is centered at L /2 from the
plenum end. (Fig.1)

3. If the back supply plenum is to have
two openings, cut openings such
that they are centered at L /4 from
each end of the plenum.
(Fig. 2)

4. Place the duct

L/4

collar(s) over the
opening(s), fastening
with screws or
tack-welds every
4 to 6 in. (10.16 to

15.24cm). (Fig. 3)

Hang the Plenum

Fig. 2

5. Hang the back
supply plenum
from the ceiling.

The back supply plenum

needs to be mounted 31.25in.
(79.375 cm) above the finished
floor. This is measured from
the lowest rear edge of the
back supply plenum to the
finished floor. (Fig. 4)

Hang using threaded rod

placed through the hanger brackets.

6. Fasten the back supply to the wall, going through the
lower back supply wall.

L (MODULE LENGTH)

L/2

Fig. 1

L (MODULE LENGTH)

L/2

Fig. 3

L/2

L/4

Exhaust - As specified in NFPA 96, Ch. 7.5 (latest

edition), exhaust duct systems must be constructed in
the following manner:

Materials: Ducts shall be constructed of and supported
by carbon steel not less than 1.37 mm (0.054 in.) (No.
16 MSG) in thickness, or stainless steel not less than

1.09 mm (0.043 in.) (No. 18 MSG) in thickness.
Installation: All seams, joints, penetrations, and duct to

hood collar connections shall have a liquid-tight external
weld. If you have an automatic fire damper, please refer
to that manual for installation instructions now.

Supply - Supply ductwork (where applicable) should

be connected to the hood in a manner approved by the
local code authorities.

NOTE

For hoods with fire dampers in the exhaust and
supply duct collars, an access panel for cleaning and
inspection shall be provided in the duct. This panel
shall be as close to the hood as possible but should
not exceed 18 in. (45.72 cm).

For proper installation of duct collars when they are
shipped unattached, see page 8.

Continuous Capture Plenum Hoods

1. Remove the support angles
provided for support during
shipping on the open
end panels. Install
and level both
hoods.

FASTENERS HOLDING THE

BACKSUPPLY TO THE WALL

31.25 INCH
CRITICAL

Fig. 4

DIMENSION

• These fasteners are to help maintain the location of
the back supply, and are not intended to hold the
weight of the back supply unit.

• The fasteners should not interfere with the
removable air diffusers.

2. After leveling, secure the
hoods together by tack­welding and/or bolting the
angles that are located at
the top of the hoods along
its width (Fig. 5).

3. Next, fasten the hoods
together at its inside
plenum profile using
u-clips and bolts (Fig.6).
Caulk this joint with NSF
Approved silicone caulk
(GE SCS1009 or its
equivalent). The caulk is
not provided.

Fig. 5

Fig. 6

Auto Scrubber 9

Installing Front/Side External Supply Plenums

Using Uni-strut

THREADED ROD

SUPPLIED BY OTHERS

UNI-STRUT (U-CHANNEL)

SUPPLIED BY OTHERS

END VIEW

HOOD

The uni-strut (supplied by others) supporting the hood
may be cantilevered over the end of the hood. Utilizing
the external supply plenum’s hanger brackets, securely
fasten to the uni-strut.

THREADED

THREADED

ROD

ROD

UNI-STRUT

UNI-STRUT

(U-CHANNEL)

(U-CHANNEL)

EXTERNAL

SUPPLY
PLENUM

1. Insert 1/2 in. (12.7 mm) diameter threaded rod (by
others) into hanger brackets on the external supply
plenum top. Raise and hang the external supply
plenum from adequate roof or ceiling supports.

NOTE

Ensure the external supply plenum is installed
flush with the hood front and is plumb and level by
adjusting the threaded rod(s). There should be no gap
between the bottom of the external supply plenum
and the hood after installation and adjustments are
completed.

2. The external supply plenum should be resting
lightly against the hood. The hood is only used to
position the plenum; it is not intended to support the
plenum. All hanger brackets on the external supply
plenum must be used and the plenum must be
properly supported while lifting to prevent damage or
distortion. The external supply plenum must be level
to operate properly.

NOTE

After hanging, secure the external supply plenum to
the hood (or to another external supply plenum) using
the supplied turnbuckle(s). Use caution tensioning the
turnbuckle. Too much tension may cause the bottom
of the external supply plenum to pull away from the
hood or cause the face of the hood to become
deformed.

Air Curtain Supply (ASP)

Horizontal Supply Plenum (HSP)

Variable Supply Plenum (VSP)

Mounted with uni-strut and threaded rod

When using uni-strut (supplied by others), it must be
bolted to the hood and external supply plenum hanger
brackets.

NOTE

The uni-strut needs to be the full length of the hood
and the external supply plenum.

Using Hanger Brackets and Threaded Rod

Air Curtain

Supply Plenum (ASP)

Horizontal Supply Plenum (HSP)

Variable Supply Plenum (VSP)

TURNBUCKLE

TURNBUCKLE

HOOD HANGER

HOOD HANGER

BRACKET

BRACKET

EXTERNAL

EXTERNAL

SUPPLY PLENUM

SUPPLY PLENUM

HANGER BRACKET

HANGER BRACKET

HOOD

EXTERNAL

SUPPLY

PLENUM

3. It is recommended that caulk be applied at the
mating seams and surfaces of the external supply
plenum, the hood, and the wall. If the external supply
plenum is next to a wall, you will need to caulk
around the surface next to the wall. Caulk the joints
with NSF Approved silicone caulk (GE SCS1009, or
its equivalent). The caulk is not provided.

Installing the Supply Duct Collar to
thePlenum

Place the duct collar(s) over the opening, fastening
with tack-welds at 1 to 2 in. (2.54 to 5.08 cm) intervals,
or sheet metal screws at 3 to 6 in. (7.62 to 15.24 cm)
intervals.

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