Desa Tech VP325B1, VP3251 Owner's Manual

B-VENT DECORATIVE GAS FIREPLACE

PFS

®

US

OWNER’S OPERATION AND INSTALLATION MANUAL

MODELS P324, VP324, P325(B) AND VP325(B)

NATURAL GAS

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.

— Do not store or use gasoline or other ammable

vapors and liquids in the vicinity of this or any other
appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any
phone in your building.

• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the re
department.

— Installation and service must be performed by a quali-

ed installer, service agency or the gas supplier.

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

For more information, visit www.fmiproducts.com

TABLE OF CONTENTS

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

Unpacking............................................................ 4

Introduction .......................................................... 4

Product Specication ........................................... 6

Selecting Location ............................................... 7

PreInstallation Preparation .................................. 7

Venting Installation .............................................. 9

Installation ..........................................................11

Operation ........................................................... 19

Inspecting Burners............................................. 20

SAFETy

Cleaning and Maintenance ................................ 21

Troubleshooting ................................................. 22

Replacement Parts ............................................ 25

Service Hints ..................................................... 25

Technical Service............................................... 25

Accessories ....................................................... 25

Parts .................................................................. 26

Wiring Diagram .................................................. 31

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

WARNING: Improper instal-

lation, adjustment, alteration,

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 installed
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, unless a certied
kit is used.

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

NOT FOR USE WITH SOLID

FUEL

CHECK LOCAL CODES PRIOR

TO INSTALLATION

SAVE THIS BOOK

This book is valuable. In addi­tion to instructing you on how

to install and maintain your

appliance, it also contains in­formation that will enable you
to obtain replacement parts or
optional accessory items when
needed. Keep it with your other
important papers.

State of Massachusetts: The

installation must be made by a
licensed plumber or gas tter

in the Commonwealth of Mas-

sachusetts.

www.fmiproducts.com

108660-01G2

SAFETy

Continued

WARNING: This product

cont a i n s an d / or g e n e r 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
before trying to assemble, op­erate or service this replace.
Improper use of this replace
can cause serious injury or death
from burns, re, explosions,
electrical shock and carbon
monoxide poisoning.

DANGER: Carbon monoxide

poisoning may lead to death!

This replace is a vented product. This re­place will not produce any gas leakage into

your home if properly installed. This replace

must be properly installed by a qualified
service person. If this unit is not properly

installed by a qualied service person, gas

leakage can occur.
Carbon Monoxide Poisoning: Early signs of

carbon monoxide poisoning resemble the u,
with headaches, dizziness or nausea. If you
have these signs, the replace may not have

been installed properly. Get fresh air at once!

Have replace inspected and serviced by a
qualied service person. Some people are

more affected by carbon monoxide than oth-

ers. These include pregnant women, people
with heart or lung disease or anemia, those
under the inuence of alcohol and those at

high altitudes.
Propane/LP and Natural Gas: Both are odor-

less. An odor-making agent is added to each
of these gases. The odor helps you detect a

gas leak. However, the odor added to these

gases can fade. Gas may be present even
though no odor exists.

Make certain you read and understand all
warnings. Keep this manual for reference. It
is your guide to safe and proper operation of

this replace.

108660-01G 3

www.fmiproducts.com

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

1. 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 unless a certied kit is

used.

2. For propane/LP replace, do not place

propane/LP supply tank(s) inside any
structure. Locate propane/ LP supply
tank(s) outdoors. To prevent performance

problems, do not use propane/LP fuel tank

of less than 100 lb capacity.

3. If you smell gas

• shut off gas supply

• do not try to light any appliance

• do not touch any electrical switch; do not

use any phone in your building

• immediately call your gas supplier from

a neighbor’s phone. Follow the gas sup­plier's instructions

• if you cannot reach you gas supplier, call

the re department.

4. Never install the replace

• in a recreational vehicle

• where curtains, furniture, clothing or

other ammable objects are less than
42" from the front, top or sides of the
replace

• in high trafc areas

• in windy or drafty areas

5. This replace reaches high temperatures.

Keep children and adults away from hot
surfaces to avoid burns or clothing igni­tion. Fireplace will remain hot for a time
after shutdown. Allow surfaces to cool
before touching.

6. Carefully supervise young children when

they are in the room with replace.

7. A hearth extension is not required with this
appliance. If one is installed, it is for aes­thetic purposes only and does not have
to meet the standard requirements.

8. Turn replace off and let cool before ser­vicing or repairing. Only a qualied service
person should install, service or repair
this replace. Have replace inspected
annually by a qualied service person.

SAFETy

Continued

9. You must keep control compartments,

burners and circulating air passages
clean. More frequent cleaning may be
needed due to excessive lint and dust

from carpeting, bedding material, etc.

Turn off the gas valve and pilot light before

cleaning replace.

10. Have venting system inspected annually by

a qualied service person. If needed, have

venting system cleaned or repaired. See

Cleaning and Maintenance, page 21.

11. Keep the area around your fireplace

clear of combustible materials, gasoline
and other ammable vapor and liquids.

Do not run fireplace where these are
used or stored. Do not place items such
as clothing or decorations on or around

replace.

12. Do not use this replace to cook food or
burn paper or other objects.

13. Do not use any solid fuels (wood, coal,
paper, cardboard, etc.) in this replace.
Use only the gas type indicated on re-

place nameplate.

UNPACkING

The following items are packed inside the

rebox. Remove before positioning rebox

into framing.

• Ceramic Log Pack - Shrink wrapped on

cardboard

• 3 plastic bags containing lava rock, pan and

ember materials

14. This appliance, when installed, must be

electrically grounded in accordance with

local codes or, in the absence of local
codes, with the National Electrical Code,

ANSI/NFPA 70.

15. Do not install replace directly on carpet­ing, vinyl tile or any combustible material
other than wood. The replace must set

on a metal or wood panel extending the

full width and depth of the replace.

16. Do not use replace if any part has been

exposed to or under water. Immediately

call a qualied service person to arrange

for replacement of the unit.

17. Do not operate fireplace if any log is
broken.

18. Do not use a blower insert, heat exchang­er insert or other accessory not approved

for use with this replace.

19. Provide adequate clearances around air
openings.

• Rear Log (P325/VP325 Models Only).

Remove 2 plastic quick ties from around
burner and grate

• Grate Stand - Lift off of burner pan

Check all items for any shipping damage. If

damaged, promptly inform dealer or distributor

where you bought the product.
Retain these items for later installation.

INTRODUCTION

These replace models are vented gas re­places that use a millivolt gas control valve
with a millivolt ignition system. P325/VP325
models have a 5" B-vent and P324/VP324

models have a 4" B-vent. A properly sized

B-Type venting system and listed type vent
cap are not supplied but are required for
proper operation. See venting instructions
on page 9.

WARNING: This gas appli­ance must not be connected to
a chimney ue servicing a solid
fuel burning appliance.

www.fmiproducts.com

These models are factory equipped for use
with natural gas and must be converted
when intended for use with propane/LP gas.
Conversion kits PCBM-324 and PCBM-325
may be purchased for simple conversion to
propane/LP gas. See Accessories, page 25.

BEFORE YOU BEGIN

Before beginning the installation of your appli-

ance, read these instructions completely.
This FMI PRODUCTS, LLC appliance and its

approved components are safe when installed
according to this installation manual and are

operated as recommended by FMI PRODUCTS,

LLC. Using any component fon FMI PROD-

UCTS, LLC approved and tested for use with this

appliance MAY CAUSE A FIRE HAZARD!

108660-01G4

INTRODUCTION

Continued

The FMI PRODUCTS, LLC warranty will
be voided by, and FMI PRODUCTS, LLC

disclaims any responsibility for the following
actions:

A) Modication of the appliance or any of the

components.

B) Use of any component part not approved

by FMI PRODUCTS, LLC in combination

with this appliance.

C) Installation and/or operation in a manner

other than instructed in this manual.

D) The burning of anything other than the

type of gas approved for use in this gas
appliance.

Installation must conform with local codes or,
in the absence of local codes, with the current

National Fuel Gas Code, ANSI Z223.1. This
appliance complies with ANSI Z21.50.

NOTICE: This appliance is not
intended to be used as a primary
source of heat.

WARNING: Installation of

this appliance should be done
by a qualied service person

well trained in the installation

of such appliances. You will
also need a building permit from
your local Building and Safety
Commissioner before installing
this appliance; otherwise your
insurance co. may not cover this
appliance.

CAUTION: Do not connect

appliance before pressure test­ing gas piping. Damage to gas

valve may result and an unsafe

condition may be caused.

The appliance and it’s individual shutoff valve
must be disconnected from the gas supply
piping system during any pressure testing of
that system at test pressures in excess of 1/2
psig (3.5 kPa).

The appliance must be isolated from the gas
supply piping system by closing its individual
manual shutoff valve during any pressure
testing of the gas supply piping system at
test pressures equal to or less than 1/2 psig
(3.5 kPa).

For the purpose of input adjustment two

pressure taps (for IN and OUT pressures)
are provided on the gas control valve for test
gauge connections to the appliance.+

108660-01G 5

www.fmiproducts.com

PRODUCT SPECIFICATION

6 7/8"

2 1/4"

7"

7"

Alternate Gas

Supply Inlet

13

1

/4"

32

1

/4"

* 27

1

/2"

29"

* 13

3

/4"

14

1

/2"

* 20

3

/8"

21

1

/2"

2

1

/2"

8

1

/4"

11

3

/4"

22

3

/8"

For Use

With B-1

Ve nt Pipe

Only

16

3

/4"

7

5

/8"

10

5

/8"

8

1

/8"

10

1

/2"

8

3

/8"

2

1

/2"

8

1

/4"

5/8"

34

1

/2"

35

3

/8"

29

1

/2"

18

1

/4"

7"

7"

16

3

/4"

36

1

/2"

* WITH REFRACTORY

DIMENSIONS

HEARTH AREA

GAS RATING - NATURAL

P324, VP324 P325(B), VP325(B)

Max. Input Rating 15,000 Btu/Hr 25,000 Btu/Hr
Manifold Pressure 3.5" WC (0.87 kPa) 3.5" WC (0.87 kPa)
Minimum Supply Pressure 4.5" WC (1.12 kPa) 4.5" WC (1.12 kPa)
Maximum Supply Pressure 10.5" WC (2.66 kPa) 10.5" WC (2.66 kPa)
Orice Size # 49 # 40

GAS RATING - PROPANE/LP

Max. Input Rating 15,000 Btu/Hr 25,000 Btu/Hr
Manifold Pressure 10" WC (2.49 kPa) 10" WC (2.49 kPa)
Minimum Supply Pressure 11" WC (2.74 kPa) 11" WC (2.74 kPa)
Maximum Supply Pressure 13" WC (3.23 kPa) 13" WC (3.23 kPa)
Orice Size # 56 # 54

Figure 1 - Appliance Dimensions

108660-01G6

www.fmiproducts.com

INTERNAL WALL
INSTALLATION

CORNER
INSTALLATION

FULL
PROJECTION
INSTALLATION

FLUSH
INSTALLATION

0"

0" Clearance

SELECTING LOCATION

To determine the safest and most efcient
location for your appliance, you must take into

consideration the following guidelines:

1. The location must allow for proper clear­ances (see Clearances).

2. Consider a location where heat output

would not be affected by drafts, air con­ditioning ducts, windows, or doors.

3. A location that avoids the cutting of joists

or roof rafters will make installation easier.
Figure 2 shows a plan view of a few com­mon locations.

Flush installations are recommended where

living space is limited or at a premium, and

since the space required to enclose the ap­pliance would be located beyond an outside

wall, this would also reduce the cutting of
joists, roof rafters, and such. Check local

codes for any restrictions.

PREINSTALLATION PREPARATION

CLEARANCES

Minimum clearances to combustibles are:
Top of Spacers 0" min.
Back and Sides of Outer Surround 0" min.
Drywall to Sides of Front

Face (Nailing Flanges) 0" min.
“B” Vent Surfaces 1" min.
Ceiling to Opening 42" min.
Floor 0" min.

Perpendicular Wall See Figure 6, page 8

CAUTION: Do not block
required air spaces with insu­lation or any other material. Do
not obstruct effective opening
of appliance with any type of
facing material.

Projected installations can extend any

distance into the room. A projection may
be ideal for a new addition on an existing,
nished wall.

Corner installations make use of space
that may not normally be used and provides

a wider and more efcient range for radiant

heat transference.
Internal wall installations provide a discreet

option for room separation and can also be
ideal as an addition to an existing wall.

Figure 2 - Possible Locations for

Installing Fireplace

2 x 4 Stud

Nailing

Back

Left Side Surround

Flange

Front Face

Drywall

Figure 3 - Minimum Clearances

(Top View)

108660-01G 7

www.fmiproducts.com

PRE-INSTALLATION PREPARATION

Spacer

3" (7.6 cm)

1

1

/2"

(3.8 cm) Max.

8" (20.3 cm)

6" (15.2 cm)

13" (33 cm)

12"

(22.9 cm)

Combustible
Materials

Header

1 1/2" (3.8 cm)

Max.

3" (7.6 cm)

Max.

6" (15.2 cm)

Max.

9"

(22.86 cm)

12"

(30.48 cm)

Outer Surround

Combustible
Material May
Be Used

TOP VIEW

SAFE
ZONE

Perpendicular
Wa ll

*

*

**

42" (10.67 cm)
Min. Clearance
from Opening to
Ceiling

0" Clearance

Ceiling

1" (2.5 cm) Min.
Clearance to
"B" Vent's Outer Pipe

Required
Air Spaces
are Indicated
with an "

*

".
Do Not
Pack with
Insulation or
Any Other
Material

DO NOT BLOCK

OR OBSTRUCT

OPENINGS

Continued

Figure 4 - Minimum Clearances (Front View)

MANTEL CLEARANCES AND WALL DETAILS

A combustible mantle shelf maybe installed a maximum 12" (22.9 cm) from the wall. Figures
5 and 6 show the minimum allowable distances from various combustible mantle components

in relation to the replace opening.

Figure 5 - Mantel Clearances - Side View

(Cross Section)

www.fmiproducts.com

Figure 6 - Side Clearances - Top View

(Cross Section)

108660-01G8

PRE-INSTALLATION PREPARATION

16 1/8"

34

3

/4"

36

5

/8"

16 3/4"

12"

39

3

/8"

55

5

/8"

34

1

/2"

16"

Continued

FRAMING

1. Frame appliance enclosure as illustrated
in Figures 7 and 8.

Note: If a wall covering is used to line the

enclosure, then all measurements must
be from the surface of the covering.

2. Place the appliance into the framing and
secure it.

Note: If appliance is to be raised above

oor level, a platform must be built to

support the appliance.

3. Install the supply line to the appliance
using a 1/2" NPT black iron gas line ter­minating 2 5/16" above the bottom of the
appliance. The gas line may be installed
from either side or from the rear of the

appliance (see Figure 18, page 13).

4. Feed exible gas line through one of three

gas line conduit sleeves and repack insu­lation to cover any openings. Prepare the

incoming gas line with Teon tape or pipe
joint compound and hookup incoming gas
line to exible gas line.

Note: If 1/2" NPT black iron pipe does not

mate with tting at the end of exible gas
line, remove tting and replace with a 37
degree are 3/4"-12, 1/2" NPT (female)
tting.

WARNING: When nishing
appliance, do not overlap com­bustible material onto the black
front face. Brick, tile, or other
noncombustible materials may
be applied to the face provided
that any gap is between the

material used and the face is

caulked with a noncombustible
caulking.

These Dimensions Allow for a 3/4"
Clearance at Sides and Back of
Fireplace. 0" Clearance is Permitted

3/4" Clearance Not Required
at Nailing Flanges

Figure 7 - Rough Opening for Installing

Figure 8 - Corner Installation Guidelines

in Wall

VENTING INSTALLATION

A B-type venting system must be connected
to the appliance for venting to the outside of
the building.

The following section is provided as a guide
to a standard B-type vent installation.

Standing codes requirements concerning B­type vent installations may vary within your

state, province or local codes jurisdiction.
Therefore, it is recommended that you check
with your local building codes for specic
requirements or in absence of local codes,

follow Section 7.0 of the current National Fuel
Gas Code NFPA No. 54/ANSI Z223.1.

108660-01G 9

www.fmiproducts.com

This gas appliance must be vented to the
outdoors only and may not be terminated into

an attic space or into a chimney ue servicing

a solid fuel burning appliance.
This appliance may be vented through a

manufactured chimney system or a masonry
chimney using a B-vent adapter or a chim-

ney liner system if all are listed, inspected

and approved by local codes and/or building
authorities.

The examples shown in Figure 9, page 10

are typical of most B-vent installations and
code practices.

Maintain
Listed
Clearance

12' Min.

45°

6'

8'

12' Min.

60°

45°

Position
Firestop

Position
Firestop

Listed
Ve nt Cap

Listed Vent Cap

Maintain
Listed
Clearance

Maintain
Listed
Clearance

Maintain
Listed
Clearance

Support

Each

Lateral

At Least

Every

6 Feet

Maintain
Listed
Clearance

EXAMPLE 2

EXAMPLE 1

Maintain
Listed
Clearance

12' Min.

45°

Position
Firestop

Listed
Ve nt Cap

Maintain
Listed
Clearance

10'

EXAMPLE 3

Lowest
Discharge
Opening

Listed
Ve nt Cap

8 Ft. Min.

Roof Pitch x/12
Listed Clearance

12

x

Listed
Gas
Ve nt

H (Min)
Height
From Roof

VENTING INSTALLATION

Continued

Example 1 shows the minimum allowable
system height and lateral offset for a 60° or

greater inclination. Code species that offsets
at 60° or greater are considered horizontal

and must follow the 75% rule for lateral to
total vertical system height. Codes also al­lows only one offset in the total system when
at 60° or greater. The total vertical height in
this example represents the minimum height
of 8 feet and therefore the allowable lateral
is 6 feet when the 75% rule applies. If the
lateral length must exceed 75% then the

system must be sized in accordance with the

Category I venting tables.
Example 2 shows a multiple offset each at 45°

of inclination. Multiple offsets are permitted if
they do not exceed 45° of inclination. The total
lengths of the two offsets are not required to
meet the 75% allowable rule.

Example 3 shows a single offset at 45° of
inclination and therefore the lateral length at
10 feet of offset does not have to meet the
75% rule.

In each case the offsets must be supported

and restops must be positioned wherever
the vent must pass through a suboor, ceil­ing joist or an attic overhang. The vent pipe

must terminate vertically into a listed type vent

cap and extend a sufcient height through
an approved roof ashing, roof jack or a roof

thimble. At all points the listed clearances
must be maintained.

Vent terminations must be located in ac­cordance with height and proximity rules of

NFPA No. 54. These rules apply to vents at
12" diameter or less and require a minimum
height in accordance with the roof pitch and
a minimum of 8 feet distance from a vertical
wall or obstruction (see Figure 10).

If venting horizontally through a side wall be­comes necessary, a listed thimble approved

for use with B-type vent must be used. Check
with your local codes before venting through
a side wall.

Roof Pitch H (Min.) Ft. m

Flat to 6/12 1.0 0.30
6/12 to 7/12 1.25 0.38
Over 7/12 to 8/12 1.5 0.46
Over 8/12 to 9/12 2.0 0.61
Over 9/12 to 10/12 2.5 0.76
Over 10/12 to 11/12 3.25 0.99
Over 11/12 to 12/12 4.0 1.22
Over 12/12 to 14/12 5.0 1.52
Over 14/12 to 16/12 6.0 1.83
Over 16/12 to 18/12 7.0 2.13
Over 18/12 to 20/12 7.5 2.27
Over 20/12 to 21/12 8.0 2.44

Figure 10 - B-Vent Terminations

Figure 9 - Typical B-Vent Conguration

www.fmiproducts.com

108660-01G10