Desa P324 Quick start guide

For more information, visit www.desatech.com
MODELS P324, VP324, P325(B) AND VP325(B)
NATURAL GAS
B-VENT DECORATIVE GAS FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
FOR YOUR SAFETY
— Donotstoreorusegasolineoranyotherammable
vapors or 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.
WARNING:Iftheinformationintheseinstructionsis
not followed exactly, a re or explosion may result
causingpropertydamage,personalinjuryordeath.

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TABLE OF CONTENTS
Safety Information ............................................... 2
Unpacking............................................................ 4
Introduction.......................................................... 4
Product Specication........................................... 6
Selecting Location ............................................... 7
PreInstallation Preparation .................................. 7
Venting Installation .............................................. 9
Installation ..........................................................11
Operating Fireplace........................................... 19
Inspecting Burners............................................. 20
Cleaning and Maintenance................................ 21
Service Hints ..................................................... 21
Technical Service............................................... 21
Troubleshooting................................................. 22
Replacement Parts............................................ 25
Accessories ....................................................... 25
Illustrated Parts Breakdown and Parts List........ 26
Wiring Diagram.................................................. 31
Warranty Information ...........................Back Cover
SAFETy INFORMATION
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addi-
tion to instructing you on how
to install and maintain your
appliance, it also contains in-
formation 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.

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108660-01E 3
WARNING: This product
contains and/or generates
chemicals known to the State
of California to cause cancer or
birthdefectsorotherreproduc-
tiveharm.
IMPORTANT:Readthisowner’s
manualcarefullyandcompletely
before trying to assemble, op-
erate 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 re-
place 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.
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 igni-
tion. 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 aes-
thetic purposes only and does not have
to meet the standard requirements.
8. Turn replace off and let cool before ser-
vicing 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 INFORMATION
Continued

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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.
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 or the Canadian Electrical
Code, CSA C22.1.
15. Do not install replace directly on carpet-
ing, 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 exchang-
er insert or other accessory not approved
for use with this replace.
19. Provide adequate clearances around
air openings.
SAFETy INFORMATION
Continued
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
• 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 re-
places 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 appli-
ancemustnotbeconnectedto
achimneyueservicingasolid
fuelburningappliance.
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 DESA appliance and its approved com-
ponents are safe when installed according
to this installation manual and are operated
as recommended by DESA. Using any com-
ponent fon DESA approved and tested for
use with this appliance MAY CAUSE A FIRE
HAZARD!

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108660-01E 5
The DESA warranty will be voided by, and
DESA 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 DESA in combination with this appli-
ance.
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 cur-
rent National Fuel Gas Code, ANSI Z223.1 or
with the current CAN/CSA B149 Installation
Codes.
This appliance complies with ANSI Z21.50-
2000 and CSA 2.22-2000 as Vented Gas
Fireplaces and is listed and tested by the
Canadian Standards Association to the above
test standards.
NOTICE: This appliance is not
intendedtobeusedasaprimary
source of heat.
INTRODUCTION
Continued 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test-
ing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.

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PRODUCT SPECIFICATION
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
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 "
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
Figure 1 - Appliance Dimensions

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108660-01E 7
Figure 2 - Possible Locations for
Installing Fireplace
INTERNAL WALL
INSTALLATION
CORNER
INSTALLATION
FULL
PROJECTION
INSTALLATION
FLUSH
INSTALLATION
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 re-
quiredairspaceswithinsulationor
anyothermaterial.Donotobstruct
effectiveopeningofappliancewith
anytypeoffacingmaterial.
Figure 3 - Minimum Clearances
(Top View)
0"
0" Clearance
Nailing
Flange
Front Face
Left Side Surround
Back
Drywall
2 x 4 Stud
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 clear-
ances (see Clearances).
2. Consider a location where heat output
would not be affected by drafts, air con-
ditioning 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 com-
mon locations.
Flush installations are recommended where
living space is limited or at a premium, and
since the space required to enclose the ap-
pliance 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.
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.

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PRE-INSTALLATION PREPARATION
Continued
MANTEL CLEARANCES AND WALL DETAILS
A combustible mantle shelf maybe installed a maximum 12" (22.9cm) from the wall. Figures 5
and 6 show the minimum allowable distances from various combustible mantle components
in relation to the replace opening.
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
Figure 5 - Mantel Clearances - Side View
(Cross Section)
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
Wall
Figure 6 - Side Clearances - Top View
(Cross Section)
Figure 4 - Minimum Clearances (Front View)
** **
42" (1067mm)
Min. Clearance
from Opening to
Ceiling
0" Clearance
Ceiling
1" (25mm) 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
0" Clearance
to Wood
or Non-
combustible
Flooring

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108660-01E 9
PRE-INSTALLATION
PREPARATION
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 ter-
minating 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).
Figure 7 - Rough Opening for Installing
in Wall
16
1
/ 8 "
34
3
/ 4 "
36
5
/ 8 "
Figure 8 - Corner Installation Guidelines
16
3
/
4
"
12"
39
3
/
8
"
55
5
/
8
"
34
1
/
2
"
16"
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
4. Feed exible gas line through one of three
gas line conduit sleeves and repack insu-
lation 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com-
bustible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.
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 B-
type 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 and in
Canada with CAN/CSA B149 for Category I
Systems Using Double Wall B-1 Vent Pipe.
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.

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Figure 9 - Typical B-Vent Conguration
Maintain
Listed
Clearance
12' Min.
45°
6'
8'
12' Min.
60° 45°
Position
Firestop
Position
Firestop
Listed
Vent 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
Vent Cap
Maintain
Listed
Clearance
10'
EXAMPLE 3
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 al-
lows 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, ceil-
ing 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 accor-
dance with height and proximity rules of NFPA
Lowest
Discharge
Opening
Listed
Vent Cap
8 Ft. Min.
Roof Pitch x/12
Listed Clearance
12
x
Listed
Gas
Vent
H (Min)
Height
From Roof
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
VENTING INSTALLATION
Continued
No. 54 or CAN/CSA B149. 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 be-
comes 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.

www.desatech.com
108660-01E 11
VENTING INSTALLATION
Continued
Some codes areas allow the use of existing B-
type vent systems if the system is at or above
the recommended diameter of the ue.
The ue connection must be made using
listed B-type connectors and the existing
system must be code inspected for damage
and proper installation.
It is not recommended that this appliance be
common vented with an existing gas burning
appliance. However, if it becomes necessary
to common vent this appliance, the venting
system must be sized and congured in ac-
cordance with the common venting guides
Appendix G of the current National Fuel
Gas Code NFPA No. 54/ANSI Z223.1 and in
Canada with CAN/CSA B149.
Note: Before connecting this appliance to an
existing vent system or a common venting
system consult with your local architect, plan-
ner, or building ofcial.
WARNING: This appliance
must be properly connected
to a system and must not be
connected to a chimney ue
servicing a separate solid fuel
burningappliance.
CHECKING FOR PROPER VENTING
After completing and checking the electrical,
gas and vent connections, follow the lighting
instructions and allow the main burner to run
for approximately 5 minutes. Hold a lit match
or cigarette near top edge of replace opening
and play it along entire length of the opening
(see Figure 11). Proper venting should tend to
draw ame or smoke into appliance. Improper
venting or escaping of spillage of burned
gas, is indicated when match ickers or goes
out. Smoke from a cigarette will also tend to
disperse away from the appliance.
If appliance is found to be improperly venting,
shut it off and notify your installer or a qualied
service agency to inspect venting system.
NOTICE: This appliance is
equipped with a vent safety
shutoff switch which will shut
down appliance in case of a
ventingproblem.Donotbypass
vent safety switch. If appliance
should shut down, contact
a qualified installer, service
agency, or your gas supplier
to have vent inspected before
operating.
Check area along entire top edge of
replace opening. Smoke or ame should
be drawn into appliance opening.
Figure 11 - Checking for Spillage
INSTALLATION
WALL SWITCH INSTALLATION
Installation of a wall switch allows you to
activate gas control valve without normal
household electricity since the valve operates
on millivolt current supplied by heat generated
by thermopile. To install wall switch:
1. Remove front refractory access panel by
lifting up and angling out rebox opening
(see Figure 12, page 12).
2. Using wire and connectors provided, at-
tach red wire to terminal marked TH/TP on
control valve. Attach white wire to blade
connector on open end of safety circuit
wiring (see Figure 13, page 12, and Wiring
Diagram, page 31).
Note: If any of original wire from unit control
must be replaced, use the same type or a
higher rated wire (25 ft. maximum length).

www.desatech.com 108660-01E12
INSTALLATION
Continued
Figure 13 - Wall Switch Wiring Diagram
Note: If any original wire as supplied must be replaced, use 18 AWG TYPE CL2 (UL) 105° C (25 ft. length MAX) or equivalent.
Conduit Sleeve
To Safety Circuit Route Millivolt
Through Gas Line
To Thermopile
Wires (Supplied) Wall Switch
(Back View)
IN
TH
TP
THTP
IN OUT
O
F
F
P
I
L
O
T
O
N
Figure 12 - Removing Front Refractory
Access Panel (P325B/VP325 Model
Shown)
WARNING: Do not wire re-
motewallswitchtomainpower
supply (standard 120V house-
holdcurrent).
3. Locate wall switch in a convenient
location.
4. After wire connections are complete,
replace refractory access panel.
OPTIONAL WIRELESS HAND-HELD
REMOTE CONTROL INSTALLATION
Note: If using optional wireless hand-held
remote control, the wall switch is no longer
operational.
Installing Receiver
1. Remove front refractory access panel
by lifting up and angling out of the re-
box opening (see Figure 12) to expose
controls.
2. Disconnect wall switch wires from TH/TP
terminals on control valve and blade con-
nector on safety circuit wiring (see Figure
13 and Wiring Diagram on page 31).
3. Install remote receiver unit onto mounting
bracket using two plastic mounting clips
(see Figure 14).
4. Connect wires to control circuit. Connect
white wire to terminal marked TH/TP on
control valve. Connect red wire to male
blade connector provided at open end of
safety circuit wiring (see Wiring Diagram,
page 31).
5. Locate battery clip mounted on back of
receiver (see Figure 15).
6. Slide 9-volt battery (not included) through
clip. Note: Only use alkaline battery.
7. Attach terminal wires to battery (see Fig-
ure 15).
8. Replace refractory brick access panel.
Figure 14 - Installing Remote Receiver
(Shown from Rear of Mounting Bracket)
Receiver
Mounting
Bracket
Plastic
Mounting
Clips
Figure 15 - Installing Battery in Receiver
Battery
Clip
9-Volt Battery
Receiver
Terminal
Wires

www.desatech.com
108660-01E 13
Installing 9-Volt Battery in Hand-Held
RemoteControlUnit
1. Remove battery cover on back of remote
control unit.
2. Attach terminal wires to battery (not
included). Place battery into battery hous-
ing. Note: Only use alkaline battery.
3. Replace battery cover onto remote control
unit.
INSTALLATION
Continued
Figure 16 - Installing Battery in Hand-
Held Remote Control Unit
GAS LINE HOOK-UP
WARNING:Gaslinehookup
should be done by your gas
supplier or a qualied service
person.
WARNING: Before you pro-
ceed,makesureyourgassupply
is OFF.
The appliance and it’s individual shutoff valve
must be disconnected from the gas supply
piping system during any pressure testing of
gas supply piping system at test pressures in
excess of 1/2 psig (3.5 kPa). Appliance must
be isolated from gas supply piping system by
closing its individual manual shutoff valve dur-
ing any pressure testing of gas supply piping
system at test pressures equal to or less than
1/2 psig (3.5 kPa).
A manual shutoff valve has been included in
the appliance’s gas supply system. You may
consider installing an extra gas shutoff valve
outside the appliance’s enclosure (check with
local codes) where it can be accessed more
conveniently with a key through a wall as
shown in Figure 17.
In conformance with local codes, route a
1/2" NPT gas line towards the appliance
coming in from any of the 3 directions shown
in Figure 18.
CAUTION:Donotkinkex-
iblegasline.
DESA recommends that a black iron gas
line be routed from the gas source, through
a sediment trap (shown in Figure 19), and
into appliance. Once connected through ap-
pliance, a exible gas line may be used for
ease of installation to gas control valve (see
Figure 20, page 14).
Figure 17 - Manual Shutoff Valve
Installation
Figure 18 - Routing Incoming Gas Line
Typical Exterior
Wall Gas Shutoff
Installation
Key
Extension
Shutoff Valve
83/8"105/8"
1/2" NPT Incoming
Black Iron Gas Line
Flexible
Gas Line
(1 Provided)
Can Be
Extended Out
Either Side
7"
7"
Alternate Gas Supply
Through Sub-Floor
3" Min.
(7.6 cm)
Side Wall
Of Appliance
Incoming
1/2" Gas Line
Permitted by
Local Codes
Sediment
Trap (Not
Supplied)
Figure 19 - Sediment Trap

www.desatech.com 108660-01E14
Before connecting the black iron gas line to
the inside of the appliance a sediment trap
must be included outside the appliance be-
tween the gas line and the gas shutoff valve.
It must extend down 3" beyond the center of
the pipe. Prepare incoming black iron gas
line with Teon tape or pipe joint compound
(Check with local building codes).
CAUTION:Compoundsused
onthreadedjointsofgaspiping
shallberesistanttotheaction
of Liqueed Petroleum (LP or
propane),andshouldbeapplied
lightly to ensure excess sealant
does not enter the gas line.
WARNING: All gas piping
andconnectionsmustbetested
forleaksaftertheinstallationis
completed.
After ensuring that the gas valve
ison,applyanoncorrosiveleak
detection solution to all con-
nectionsandjoints.Ifbubbles
appear, leaks can be detected
and corrected.
Donotuseanopenameforleak
testing and do not operate any
applianceifaleakisdetected.
Complete your gas installation by connect-
ing incoming gas line with exible gas line.
Secure tightly with wrench but DO NOT
OVERTIGHTEN.
INSTALLATION
Continued
GRATE PLACEMENT
The grate must be placed in the burner pan so
that the back grate ngers (P325/VP325) or
pins (P324/VP324) t into the notches on back
of burner pan and front legs t inside burner pan
as shown in Figure 21.
P
I
L
O
T
ON
OFF
IN OUT
Figure 20 - Connecting Flexible Gas Line to Millivolt Valve
Gas Shutoff
Valve
Flexible Gas Line
Do NOT Kink
1/2" NPT
Incoming
Gas Line
Note:
1) Wire Connections
Not Shown for Clarity
2) * 1/8" NPT Plugged
Tapping
Red Surface Indicates
For Propane/LP Use Only Pilot Adj
Inlet Pressure Tap
Outlet
Pressure Tap
Figure 21 - Placing Grate into Burner Pan
P324/VP324(Back)
P325/VP325(Back)
Pins
Notches
Pins
Back Grate Fingers
Burner Pan
Front
Leg
Notches
Burner Pan
Front
Leg
Back Grate
Fingers
EMBER AND PAN MATERIAL
PLACEMENT
1. Open the bag(s) of vermiculite and ll
the entire burner pan until the burner
tube is completely covered (see Figure
22, page 15).
2. Smooth the pan material just even with
edges of the burner pan.
3. Remove the ember material from the bag
and atten small amounts into quarter size
pieces and lay on top of the surface of the

www.desatech.com
108660-01E 15
pan material (see Figure 23, page 15).
4. Place just enough to cover the entire sur-
face and leave about a 1/2" gap under the
lower grate members to allow air to ow
(see Figure 24).
INSTALLATION
Continued
Figure 22 - Fill Entire Burner Pan with
Vermiculite (P325/VP325 Models Shown)
Vermiculite
(Pan Material)
Burner Pan
Grate
Figure 23 - Ember Material on Surface of
Pan Material (Vermiculite) (P325/VP325
Models Shown)
0.5"
0.5"
Figure 24 - Pan and Ember Material
Clearances (P325/VP325 Models Shown)
Ember Material
Burner
Pan
Vermiculite (Pan
Material)
Grate
Grate
Burner Pan
Pan and Ember
Material
LOG PLACEMENT FOR P324/VP324
MODELS
1. Place front log onto front of grate sliding
log all the way forward against grate n-
gers (see Figure 25).
2. Insert pegs on bottom of rear log into holes
in rear of grate (see Figure 25).
3. Place top right log into notches on left side
of front and rear (see Figure 26).
4. Place top left log into notches on right side
of front and rear (see Figure 26).
NOTICE: Do not put lava rock
insidetheburnerpanoraround
theairmixertting.Placinglava
rock inside the burner pan or
blockingtheopeningsofthepro-
pane/LPair-mixer could cause
performanceproblems.
Figure 25 - Installing Front and Rear Logs
Front Log Rear Log
Figure 26 - Installing Top Left and
Right Logs
Top Left
Log Top
Right
Log

www.desatech.com 108660-01E16
LOGPLACEMENTFORP325(B)/
VP325(B)MODELS
1. Place rear log onto grate making sure
notches rest over grate (see Figure 27).
2. Place front right log onto front right side
of grate with back of log tting into notch
on right front of rear log (see Figure 27).
3. Rest front of front left log between rst two
grate ngers on left of grate assembly and
rear into notch on left front of rear log (see
Figure 28).
4. Place top of log 4 into notch on log 1. Rest
log 4 on the center of grate as shown in
Figure 29.
5. Place top of log 5 into notch on top right
of log 1 (see Figure 29). Rest log 5 be-
tween two middle grate ngers as shown
in Figure 30.
To enhance the look of the hearth you may
optionally place the lava rock provided around
the front and sides of the burner.
NOTICE: Do not put lava rock
insidetheburnerpanoraround
theairmixertting.Placinglava
rock inside the burner pan or
blocking the openings of the
propane/LPair-mixercouldcause
performanceproblems.
INSTALLATION
Continued
Figure 27 - Installing Logs 1 and 2
Rear
Log
Front
Right Log
Figure 29 - Installing Logs 4 and 5
Figure 30 - Logs Installed
Top Log
Top Y-Log
Rear Log
Front Left
Log
Figure 28 - Installing Log 3
Front
Left Log
Rear Log

www.desatech.com
108660-01E 17
COMBUSTION AIR KIT MODEL AK4
(OPTIONAL)
The outside air kit may be installed on the
left side of the replace only. The vent can
be installed through the outside wall or a
ventilated crawl space. The handle to operate
the damper door for the outside air inlet will
be located inside the left “screen pocket” of
the rebox (see Figure 31). Pull the handle to
open or push to close.
CAUTION: Air inlet ducts are
nottoterminateinatticspace.
Figure 31 - Air Kit Handle Location
Air Kit
Handle
Screen
Pocket
APPLIANCE ENCLOSURE
Before nishing enclosure around appliance,
inspect all joints around outer surround. Any
gaps between nailing anges and framing
should be sealed with noncombustible insula-
tion or caulking (see Figure 32).
If appliance is mounted on a raised platform,
it must be a continuous surface and not
on blocks without a solid surface. This will
prevent the entry of cold air by means of
conduction through the total bottom of the
appliance.
INSTALLATION
Continued Side
Framing
Side
Framing
Caulk Here Pack
Insulation
Figure 32 - Sealing Between Appliance
and Framing
INSTALLING OPTIONAL GLASS
DOOR ACCESSORY
CAUTION: Use only glass
doorscertiedforusewiththis
appliance.
Note: Assistance with installation may be
needed as glass doors are heavy.
These B-vent replaces are approved for use
with optional bi-fold glass doors (see Acces-
sories, page 25). The glass panels may be
ordered and installed anytime after the re-
place installation is complete.
Follow these steps to install left and right
panels:
1. With handle at the bottom, completely fold
panel on its hinges.
2. With handle facing center of rebox open-
ing, insert lower pivot pin on glass door
panel into hole in pivot plate on bottom edge
of replace opening (see Figure 33).
Figure 33 - Installing Optional Glass
Door
Spring Clip
Insert Pin Into
Spring Clip
Insert Bottom
Pivot Pin
Into Pivot
Plate and
Swing Door
Into Vertical
Position
Pivot
Plate
Slide Top Pin Into
Door Track

www.desatech.com 108660-01E18
3. Keeping folded door tilted, slide upper
two pins into the guide track found under
upper facial edge of rebox opening.
4. Tilt door assembly fully vertical until outer
pivot pin snaps into mounting hole in upper
spring clip (see Figure 33, page 17).
5. Once top and bottom pins are secured,
unfold door into closed position.
6. Repeat process for opposite door
assembly.
7. To adjust doors, slide them partially open.
Using a screwdriver, loosen thehold-down
screws in spring clip (see Figure 34) and
pivot plate.
8. Close both doors until evenly joined at
the middle and note gap at outer edges
of face.
9. Reopen one door at a time and retighten
upper and lower hold-down screws.
10. Repeat process until both doors are even-
ly joined, spaced and working freely.
CAUTION: Glass panels
becomeveryhotwhiletheap-
pliance is operating. Do not
attempttoadjustorcleanglass
doors until appliance has fully
cooled.
INSTALLATION
Continued
Figure 34 - Adjusting Glass Doors
Spring Clip
Hold-Down
Screw
Side
Front
Face
Partially
Opened
Door
Figure 35 - Removing Glass Doors
Spring
Clip
Press Spring Clip
to Release Pivot
Pin
Remove
Bottom
Pin From
Pivot Plate
While
Sliding
Door Out
of the
Upper
Track
Pivot Plate
Fold Bi-Fold Door
After Releasing
Spring Clip and
Slide Door Out of
Upper Track
Doors may be removed for replacement or
cleaning as follows:
1. Partially open door and press up on the
upper spring clip with a screw driver until
outer top pivot pin is free of clip.
2. Fully fold frame assembly and slide up-
per edge toward center of rebox open-
ing until guide pins are free of frame rail
(see Figure 35).
CAUTION: Always operate
appliance with doors either fully
opened or fully closed. Operat-
ing appliance with doors par-
tiallyopencanresultinimproper
ventingofueproducts.

www.desatech.com
108660-01E 19
OPERATING FIREPLACE
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
a re or explosion may result
causingpropertydamage,per-
sonalinjuryorlossoflife.
A. Thisappliancehasapilotwhichmust
be lighted by hand. When lighting
the pilot, follow these instructions
exactly.
B. BEFORE LIGHTING smell all around
the appliance area for gas. Be sure to
smellnexttotheoorbecausesome
gas is heavier than air and will settle
ontheoor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric 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.
C. Use only your hand to push in or turn
thegascontrolknob.Neverusetools.
Iftheknobwillnotpushinorturnby
hand,don’ttrytorepairit,callaquali-
edservicetechnicianorgassupplier.
Forceorattemptedrepairmayresultin
areorexplosion.
D. Do not use this appliance if any part
hasbeenunderwater.Immediatelycall
aqualiedservicetechniciantoinspect
the appliance and to replace any part of
thecontrolsystemandanygascontrol
whichhasbeenunderwater.
LIGHTING
INSTRUCTIONS
NOTICE: During initial operation
ofnewheater,burninglogswill
giveoffapaper-burningsmell.
Orangeamewillalsobepres-
ent.Opendamperorwindowto
ventsmell.Thiswillonlylasta
few hours.
1. STOP! Read the safety information,
column1.
2. Turnwallswitch(ifinstalled)totheOFF
position.
3. Turn off all electric power to appliance.
4. Fully open glass doors if installed.
5. Removefrontrefractorybrickaccess
panel.
6. Turngascontrolknobclockwise
totheOFFposition(seeFigure36).
7. Waitve(5)minutestoclearoutany
gas. Then smell for gas, including
neartheoor.Ifyousmellgas,STOP!
Follow“B” inthe safety information,
column1.Ifyoudon’tsmellgas,goto
the next step.
8. Turn control knob counterclockwise
to the PILOT position.
9. Push knob in all the way and hold.
Immediatelylightpilotmanually.Con-
tinuetoholdcontrolknobinforabout
(1)minuteafterpilotislit.Releaseknob
and it will pop back up. Pilot should
remainlit.Ifitgoesout,repeatsteps
5 through 9.
• If knob does not pop up when released,
stop and immediately call your service
technician or gas supplier.
• If pilot will not stay lit after several tries,
turn gas control knob to “OFF” and call
your service technician or gas supplier.
10.Turn gas control knob counterclock-
wise  to “ON”. Knob can be
turnedto“ON”onlyifcontrolknobis
popped out.
11.Replacefrontrefractorybrickaccess
panel.
12.Fullycloseglassdoorsifinstalled.
13.Turnonallelectricpowertothe
appliance.
Figure 36 - Control Knob in the PILOT
position
P
I
L
O
T
ON
OFF
IN OUT
IN
Position Indicator Gas Control Knob
Pilot
Adjustment
Screw

www.desatech.com 108660-01E20
TO TURN OFF GAS
TO APPLIANCE
1. Turnoffwallswitch(ifinstalled).
2. Turn off all electric power to appliance
ifserviceistobeperformed.
3. Fully open glass doors if installed.
4. Removefronthearthbrickandcontrol
access panel.
5. Turn gas control knob clockwise
to “OFF”. Do not force.
6. Replacefrontrefractorybrickaccess
panel.
7. Fully close glass doors if installed.
OPERATING FIREPLACE
Continued
OPTIONAL HAND-HELD
REMOTE OPERATION
Note:Receiverandhand-heldremotecon-
trolkitmustbepurchasedseparately(see
Accessories,page25).Followinstallation
instructionsonpage12ofthismanual.
1. Afterlighting,letpilotameburnfor
aboutoneminute.Turncontrolknobto
ON position. Slide the selector switch
to the REMOTE position. Note: Burner
may light if hand-held remote ON
button was on when selector switch
was last turned off. You can now turn
burner on and off with hand-held re-
motecontrolunit.
IMPORTANT: Do not leave selector
switch in the REMOTE position when
pilotisnotlit.Thiswilldrainbattery.
IMPORTANT: Be sure to press ON/OFF
buttonsonhand-heldremotecontrol
unit for up to 3 seconds to assure
proper operation.
Thermopile
Pilot Burner
Ignitor
Figure 38 - Correct Pilot Flame Pattern
Figure 37 - Pilot
Thermopile
Pilot
Burner
Ignitor
2. PressON/OFFbuttontoturntheburner
on and off. When turning burner off,
pilotwillremainlit.
IMPORTANT:Toturnpilotoff,manually
turn control knob on heater to OFF
position.
3. Toleavepilotlitandshutoffburners
only,turnremotecontrol/wallswitch
(ifinstalled)totheOFFposition.)
TO TURN OFF GAS
TO APPLIANCE
1. Pressinandturncontrolknobclock-
wise to the OFF position.
2. Closeequipmentshutoffvalve
INSPECTING BURNERS
Check pilot ame pattern and burner ame
patterns often.
PILOT ASSEMBLY
The pilot assembly is factory preset for the
proper ame height. Alterations may have
occurred during shipping and handling. The
pilot is located on the back right hand side
of the burner.
The height of thermopile must be 3/8" to 1/2"
above pilot ame. Flame from pilot burner
must extend beyond thermopile.
If your pilot assembly does not meet these
requirements:
• Turn adjustment screw marked pilot clock-
wise to decrease or counterclockwise to
increase ame to proper size (see Figure
36, page 19). Do not remove adjustment
screw.
• see Troubleshooting, page 22