Desa VFF-32H-AKA, VFF-32S-AKA, VFF-36H-AKA, VFF-36S-AKA, VFF-42S-AKA Owner's Operation And Installation Manual

UNVENTED (VENT-FREE) UNIVERSAL FIREBOX

OWNER’S OPERATION AND INSTALLATION MANUAL

NON-CIRCULATINg MODELS
VFF-32H-AKA, VFF-36H-AKA, VFF-42H-AKA
VFF-32S-AKA, VFF-36S-AKA, VFF-42S-AKA,

VTFB32. VTFB32H, VTFB36, VTFB36H, VTFB42, VTFB42H

WARNING: If the information in this manual is not

followed exactly, a re or explosion may result causing
property damage, personal injury or loss of life.

FOR USE ONLY WITH A LISTED GAS-FIRED UNVENTED
DECORATIVE ROOM HEATER NOT TO EXCEED 40,000

BTU/HR. DO NOT BUILD A WOOD FIRE.

Carefully review the instructions supplied with the
decorative type unvented room heater for the minimum
replace size requirement.

DO NOT INSTALL THE APPLIANCE IN THIS FIREBOX,
UNLESS THIS FIREBOX MEETS THE MINIMUM DIMEN-

SIONS REQUIRED FOR THE INSTALLATION.

This rebox has been tested and approved under ANSI
Z21.91 for use with any ANSI Z21.11.2 approved gas logs.

INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.

For more information, visit www.desatech.com

TABLE OF CONTENTS

Safety .................................................................. 2

Local Codes......................................................... 3

Product Features ................................................. 4

Locating Firebox .................................................. 4

Product Specications ......................................... 5

Air For Combustion and Ventilation ..................... 7

SAFETy

Installation ........................................................... 9

Replacement Parts ............................................ 14

Technical Service............................................... 14

Accessories ....................................................... 15

Parts .................................................................. 16

Warranty ..............................................Back Cover

WARNING: Improper

installation, adjustment,

alter ation, service or
maintenance can cause

injury or property dam­age. Refer to this manual

for correct installation

and operational proce­dures. For assistance or

additional information

consult a qualified in­staller, service agency or
the gas supplier.

This appliance may be in-

stalled in an aftermarket,*

permanently located,
manufactured (mobile)
home, where not prohib­ited by local codes.

This appliance is only for
use with the type of gas
indicated on the rating
plate. This appliance is
not convertible for use
with other gases.

* Aftermarket: Completion of sale, not for
purpose of resale, from the manufacturer

WARNING: This product

con tains a nd/o r g ener ates

chemicals known to the state
of California to cause cancer or

birth defects or other reproduc­tive harm.

IMPORTANT: Read this owner’s

manual carefully and completely
be fore trying to a ssemble,
operate or service this heater.
Improper use of this replace
can cause serious injury or
death from burns, re, explo­sion, electrical shock and carbon
monoxide poisoning.

WARNING: Any change to
this rebox or its controls can
be dangerous.

WARNING: Do not allow fans

to blow directly into the rebox.
Avoid any drafts that alter burner
ame patterns. Ceiling fans can
create drafts that alter burner
ame patterns. Altered burner
patterns can cause sooting.

WARNING: Do not use a blow­er insert, heat exchanger insert
or other accessory not approved
for use with this rebox.

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116208-01G2

SAFETy

Continued

Firebox front and screen become
very hot when running heater.
Keep children and adults away
from hot surface to avoid burns
or clothing ignition. Firebox

will remain hot for a time after

shutdown. Allow surface to cool
before touching.

Do not place clothing or other
ammable material on or near
the appliance. Never place any
objects in the rebox or on
logs.

Carefully supervise young chil-

dren when they are in the room

with rebox.

You must operate this replace
with the provided fireplace
screen, hood if provided, in
place. Make sure these parts
are in place and screens are
closed before running rebox.
The supplied hood may not be
replaced with a hood which may
be provided with a log heater.

LOCAL CODES

Install and use with care. Follow all local

codes. In the absence of local codes, use
the latest edition of The National Fuel Gas
Code, ANSI Z223.1/NFPA 54*. Firebox must

be electrically grounded in accordance with

the National Electrical Code, ANSI/NFPA70
(latest edition).

*Available from:

American National Standards Institute, Inc.

1430 Broadway

New York, NY 10018

National Fire Protection Association, Inc.

Batterymarch Park

Quincy, MA 02269

Keep the replace area clear and
free from combustible materials,
gasoline and other ammable
vapors and liquids.

1. Do not use this rebox as a wood-burning
replace. Use only decorative unvented

room heaters (log sets).

2. Do not add extra logs or ornaments such as

pine cones, vermiculite or rock wool. Using

these added items can cause sooting.

3. Use only provided hood or appropriate

hood accessory. See Accessories on
page 15.

4. Vent-free gas log heaters installed in
these reboxes require fresh air ventila­tion to run properly. See Air for Combus-
tion and Ventilation, page 7.

5. Do not run heater in rebox

• where ammable liquids or vapors are

used or stored

• under dusty conditions

6. Do not use heater in this rebox to cook

food or burn paper or other objects.

7. Turn installed heater off and let cool

before servicing rebox. Only a qualied

service person should service and repair

rebox.

8. Do not use the rebox if it has been un­der water due to the shock hazard that
could result with the blower accessary (if

installed) in place.

State of Massachusetts: The installation
must be made by a licensed plumber or
gas tter in the Commonwealth of Mas­sachusetts.

Sellers of unvented propane or natural

gas-red supplemental room heaters shall

provide to each purchaser a copy of 527

CMR 30 upon sale of the unit.

Vent-free gas products are prohibited for
bedroom and bathroom installation in the

Commonwealth of Massachusetts.

116208-01G 3

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PRODUCT FEATURES

OPERATION

This rebox is designed for use with approved

ANSI Z21.11.2 decorative type unvented room

heaters. (Physical size limitations apply. Refer
to minimum rebox requirements supplied
with log heater.) It requires no outside venting

or chimney making installation easy and in-

expensive. When used without blower, heater
installed in rebox requires no electricity mak-

ing it ideal for emergency backup heat.

LOCATINg FIREBOX

PLANNING

Plan where you will install the rebox. This will
save time and money later when you install
the rebox. Before installation, consider the
following:

1. Where rebox will be located: Allow for
wall and ceiling clearances (see Installa-

tion Clearances, page 10).

2. Everything needed to complete replace

installation.

REFRACTORY BRICK LINER

Your rebox may feature a concrete refractory
brick liner. As with all concrete liners, this liner
may develop slight cracks when exposed to
heat. These cracks will not affect performance
of replace or vent-free gas logs.

OUTSIDE AIR KIT ACCESSORY

An optional AK4 air kit provides additional out-

door air to improve burner efciency and reduce

build-up of condensation in the living space.

Follow instructions included with air kit.

3. These models CANNOT be installed in

a bedroom unless maximum Btu rating
of installed vent-free log set is less than
10,000 Btu/hr.

4. Proper air for combustion and ventilation
(page 7).

www.desatech.com

116208-01G4

3 9/16"

3

7

/16"

8

1

/8"

8

1

/8"

10

1

/2"

9

3

/4"

291/2"

2315/16"

39/16"

17

3

/8"

251/8"

29

1

/2"

34

7

/16"

36

3

/8"

Standoffs

221/2"

4"

321/4"

361/2"

1415/16"

65/16"

3

3

/8"

3

9

/16"

8

1

/8"

41/4"

31/2"

Built-In
Side
Nailing
Flanges

5/8"

32" MODELS

291/2"

23

15

/16"

251/8"

29

1

/2"

34

7

/16"

36

3

/8"

Standoffs

221/2"

4"

321/4"

361/2"

1415/16"

65/16"

3

3

/8"

815/16"

93/4"

121/4"

191/2"

1611/16"

19/16"

3

9

/16"

8

1

/8"

213/16"

85/8"

41/4"

31/2"

Built-In
Side
Nailing
Flanges

Square
Gas Line
Access
Holes

5/8"

Left Side
View with
Air Kit

Outside Air

Kit Location

(Optional)

PRODUCT SPECIFICATIONS

Firebox Top View

Top View

Right Side View

Back View

Front View

116208-01G 5

Figure 1 - Firebox Dimensions (32" Models)

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201/2"

(36" Models)

24

1

/8"

(42" Models)

29/16"

26" (36" Models)

29

1

/2" (42" Models)

35" (36" Models)
42" (42" Models)

Full Length Nailing Flanges, Top and Sides

8"

8"

8"

8"

2"

40

1

/

4

" (36" Models)

44

1

/

4

" (42" Models)

43"(36" Models)•50"(42" Models)

35" (36" Models)
42" (42" Models)

29

1

/16" (36" Models)

36

1

/8" (42" Models)

41

1

/8"(36" Models)•481/8"(42" Models)

5/8"

4"

293/8" (36" Models)
36

1

/2" (42" Models)

36" (36" Models)

40" (42" Models)

PRODUCT SPECIFICATIONS

13 11/16" (36" Models)
12

3

/8" (42" Models)

7 1/4" (36" Models)
9" (42" Models)

2 9/16"

10

1

/2"

(36" Models)

12

1

/2"

(42" Models)

1311/16" (36" Models)

15

9

/16" (42" Models)

2

9

/16"

3

13

/16"

26" (36" Models)

29

1

/2" (42" Models)

35" (36" Models)
42" (42" Models)

Full Length Nailing Flanges, Top and Sides

8"

8"

8"

8"

2"

40

1

/

4

" (36" Models)

44

1

/

4

" (42" Models)

43"(36" Models)•50"(42" Models)

35" (36" Models)
42" (42" Models)

29

1

/16" (36" Models)

36

1

/8" (42" Models)

24

15

/16" (36" Models)

26

7

/8" (42" Models)

9

9

/16"

(36" Models)

10

11

/16"

(42" Models)

21

1

/8" ( 36" Mod els)

23

1

/16" (4 2" Mode ls)

41

1

/8"(36" Models)•481/8"(42" Models)

5/8"

4"

293/8" (36" Models)
36

1

/2" (42" Models)

36" (36" Models)

40" (42" Models)

Continued

36" AND 42" MODELS

Note: If only one dimension is shown, dimension is the same for both 36" and 42" models.

Left Side

View with

Air Kit

Outside Air

Kit Location

(Optional)

Firebox Top View

Top View

Right
Side
View

Front View

Figure 2 - Firebox Dimensions (36" and 42" Models)

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Back View

116208-01G6