Accurex XRSI Operator’s Manual

Document 483581

Model XRSI and XRSR

Gravity Ventilators

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.

Designed for either supply or exhaust applications on natural gravity or positive
pressure systems. Often used in conjunction with other HVAC products
requiring an intake or exhaust vent. These units are low profile and have a rigid
aluminum, corrosion resistant design providing a strong, long lasting, efficient
and economical product. Integral birdscreen prevents entry of birds and other
small objects. Built in curb cap with prepunched holes for easy attachment to
roof curbs.

Optional built-in flashing flange (model XRSF) with prepunched holes for quick
and easy installations without a roof curb.

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 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 representative. Any
physical damage to the unit after acceptance is not the
responsibility of the manufacturer.

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 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.

Installation

NOTE

Mount unit on a flat surface or mount to a roof curb.

Roof mount with a curb

1. Cut an appropriate sized hole in the roof surface.
Follow curb manufacturer’s installation instructions.
Caulk and flash curb to ensure a watertight seal.

2. Install optional backdraft damper. Secure damper
flange to curb damper tray.

3. Place ventilator on curb.

4. Secure ventilator to roof curb using a minimum of
eight fasteners.

5. Check all fasteners for tightness.

Roof mount with flashing flange

1. Cut an appropriate sized hole in the roof surface.
Caulk flashing flange to ensure a watertight seal.

2. Install optional backdraft damper. Secure damper to
duct work.

3. Place ventilator on roof.

4. Secure ventilator to roof using a minimum of eight
fasteners.

5. Check all fasteners for tightness.

Maintenance

Keep inlets and approaches to ventilator clean and free
from obstruction. Depending on the usage and severity
of the contaminated air, a regularly scheduled inspection
for cleaning the ventilator, and surrounding areas should
be established.

Gravity Ventilators 1

Dimensional Data Parts List

Unit
Size

All dimensions in inches (millimeters) and the weight in pounds (kilograms).

NOTE: Sizes XRS-8 through 24 have a one-piece cover and shroud. Access is gained
through the removal of screws. Sizes XRS-30 through 48 have a removable cover,
separate from the shroud to facilitate maintenance and servicing of dampers.

AB CD E F

19

8

(483)

19

10

(483)

22

12

(559)

22

15

(559)

26

16

(660)

30

18

(762)

30

20

(762)

34

24

(864)

40

30

(1016)

46

36

(1168)

52

42

(1321)

58

48

(1473)

1

20

(521)

1

20

(521)

29

(737)

29

(737)

29

(737)

1

35

(902)

1

35

(902)

1

38

(972)

48

(1219)

3

56

(1441)

1

63

(1607)

72

(1829)

⁄2

(184)

⁄2

(197)2 (51)

(254)

(254)

(279)

⁄2

(248)

⁄2

(286)

⁄4

(279)4 (102)

(476)

⁄4

(540)6 (152)

⁄4

(616)

(667)

71⁄4

73⁄4

10

10

11

93⁄4

111⁄4

11

18

211⁄4

241⁄4

26

11⁄2

(38)

1

3

⁄2

(89)

1

3

⁄2

(89)

1

4

⁄4

(108)

13⁄4

(44)

33⁄4

(95)

3

⁄4

57⁄16

(138)

61⁄4

(159)

1

⁄4

61⁄2

(165)

201⁄4

(514)

201⁄4

(514)

231⁄4

(591)

231⁄4

(591)

271⁄4

(692)

311⁄4

(794)

311⁄4

(794)

35

(895)

-

-

-

-

81⁄4

(210)

101⁄4

(260)

121⁄4

(311)

141⁄4

(362)

16

(413)

201⁄4

(514)

201⁄4

(514)

1

⁄4

241⁄2

(622)

30

(775)

36

(927)

42

(1089)

48

(1232)

1

⁄4

1

⁄2

1

⁄2

1

⁄2

1

⁄2

Damper

Size

8 x 8

(203 x 203)

10 x 10

(254 x 254)

12 x 12

(305 x 305)

16 x 16

(406 x 406)

16 x 16

(406 x 406)

18 x 18

(457 x 457)

18 x 18

(457 x 457)

24 x 24

(610 x 610)

30 x 30

(762 x 762)

36 x 36

(914 x 914)

42 x 42

(1067 x 1067)

48 x 48

(1219 x 1219)

Hood

Birdscreen

Optional Flashing Flange

Birdscreen
Support Bracket (4)

HoodWindband

XRSI/XRSR Sizes 8 - 24

B

D

F
A

C

1¾

(44)

XRSI/XRSR - Sizes 30 - 48

B

C

D

F
A

1¾

(44)

Curb Cap

XRSF - Sizes 8 - 24

with Optional Flashing Flange

B

C

D

F
E

Our Commitment

Our Commitment

As a result of our commitment to continuous improvement, Accurex reserves the right to change specifications
without notice.

Product warranties can be found online at accurex.com, either on the specific product page or in the Warranty
section of the website at Accurex.com/Resources/Warranty.

P.O. Box 410 Schofield, WI 54476
Phone: [phone] • Fax: [phone]
Parts: 800.355.5354 • accurex.com

2

483581 • XRSI and XRSR, Rev. 1, January 2019 © 2019 Accurex, LLC2