Desa GA3700 Quick start guide

For more information, visit www.desatech.com
WARNING: If the information in this manual is not


         


— WHAT TO DO IF YOU SMELL GAS
 
 

 

 

 -

      

UNVENTED (VENT-FREE) GAS FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
VYGF33PRC AND VYGF33NRC
REMOTE-READY GAS FIREPLACE SYSTEMS

Shown with

mantel with hearth



www.desatech.com 113109-01G2
SAFETY
TABLE OF CONTENTS
Safety .................................................................. 2
Product Identication........................................... 4
Local Codes......................................................... 5
Unpacking............................................................ 5
Product Features................................................. 5
Air For Combustion And Ventilation..................... 6
Installation ........................................................... 8
Operation........................................................... 19
Inspecting Burner .............................................. 23
Cleaning and Maintenance................................ 24
Troubleshooting................................................. 25
Wiring Diagram.................................................. 29
Specications .................................................... 29
Replacement Parts............................................ 29
Technical Service............................................... 29
Service Hints ..................................................... 29
Parts .................................................................. 30
Accessories ....................................................... 34
Warranty ..............................................Back Cover
 
 
alteration, service or
maintenance can cause
   -

for correct installation
  -
   
additional information
   -


WARNING: This is an
  -
    
from the room in which


and ventilation air must
 Air
for Combustion and Ven-
tilation 

-
stalled in an aftermarket,*
 
 
-


     
   
   
   



-

known to the state of California




   
    

    
   
   


www.desatech.com
113109-01G 3


   Early signs
of carbon monoxide poisoning resemble the
u, with headaches, dizziness or nausea. If
you have these signs, the replace may not
be working properly. Get fresh air at once!
Have replace serviced. 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.
 Natural and
Propane/LP gases are odorless. An odor-
making agent is added to these gases. The
odor helps you detect a gas leak. However,
the odor added to the gas 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.
    
this heater or its controls can

WARNING: Do not use a
   
-

WARNING: Do not allow fans



    
   

    



SAFETY
Continued
 
    


    -
-

away from hot surfaces to avoid
-



-
dren when they are in the room

   -
   
 



    
     -
     

    
-
-

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.
2. Do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP
supply tank(s) outdoors (propane/LP
units only).

www.desatech.com 113109-01G4
SAFETY
Continued
system. The ODS shuts down the replace
if enough fresh air is not available. See Air
for Combustion and Ventilation, page 6. If
replace keeps shutting off, see Trouble-
shooting, page 25.
10. Do not run replace
• where ammable liquids or vapors are
used or stored
• under dusty conditions
11. Do not use this replace to cook food or
burn paper or other objects.
12. Do not use replace if any part has been
exposed to or under water. Immediately
call a qualied service technician to in-
spect the replace and to replace any part
of the control system and any gas control
which has been under water.
13. Do not operate fireplace if any log is
broken. Do not operate replace if a log
is chipped (dime-sized or larger).
14. Turn fireplace off and let cool before
servicing. Only a qualied service person
should service and repair replace.
15. Operating replace above elevations of
4,500 feet could cause pilot outage.
16. To prevent performance problems in
propane/LP units, do not use propane/
LP fuel tanks of less than 100 lbs. ca-
pacity (propane/LP units only).
17. Provide adequate clearances around air
openings.
Figure 1 - Log Base Assembly
Piezo
Ignitor
Optional
Remote
Control
Control
Knobs
Firebox
Hood
Firebox
Support
Log Set
Remote Selector
Switch (Optional)
Top Outer
Casing
Blower Assembly
(Optional)
Screen
Assembly
Figure 2 - Fireplace
Louver
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 your gas supplier,
call the re department
4. This replace shall not be installed in a
bedroom or bathroom.
5. Do not use this replace as a wood-burn-
ing replace. Use only the logs provided
with the replace.
6. Do not add extra logs or ornaments such
as pine cones, vermiculite or rock wool.
Using these added items can cause soot-
ing. Do not add lava rock around base.
Rock and debris could fall into the control
area of replace.
7. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 24.
8. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater off. If
heated, the vapors from these products may
create a white powder residue within burner
box or on adjacent walls or furniture.
9. This replace needs fresh air ventilation to
run properly. This replace has an Oxygen
Depletion Sensing (ODS) safety shutoff
PRODUCT IDENTIFICATION

www.desatech.com
113109-01G 5
LOCAL CODES
Install and use replace 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*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
State of Massachusetts: The installation
must be made by a licensed plumber or
gas tter in the Commonwealth of Mas-
sachusetts.
Sellers of unvented propane or natural
gas-fired 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.
UNPACKING
CAUTION: Do not remove the




1. With utility knife, cut the carton all the way
around above the staples on the bottom
tray. Lift the carton off the heater. Remove
packing.
Note: The hood is located in the packing
on the right hand side of the heater front.
Lift the heater off the bottom tray.
2. Locate two screws above top corners of
the replace screen. Remove and discard
these screws. Lift replace screen up and
pull out to remove.
3. Remove protective packaging applied to
logs, log base assembly and replace.
4. Remove fireplace hood from carton
insert.
5. Check all items for any shipping damage.
If damaged, promptly inform dealer where
you bought replace.
PRODUCT FEATURES
OPERATION
This vent-free replace is clean burning. It re-
quires no outside venting. There is no heat loss
out a vent or up a chimney. Heat is generated by
realistic ames. When used without the blower,
replace requires no electricity making it ideal
for emergency backup heat. This heater is de-
signed for vent-free operation. It has been tested
and approved to ANSI Z21.11.2 standard for
unvented heaters. State and local codes in some
areas prohibit the use of vent-free heaters.
SAFETY DEVICE
This replace has a pilot with an Oxygen
Depletion Sensing (ODS) safety shutoff
system. The ODS/pilot is a required feature
for vent-free room heaters. The ODS/pilot
system shuts off the replace if there is not
enough fresh air.
PIEZO IGNITION SYSTEM
This replace has a piezo ignitor. This sys-
tem requires no matches, batteries or other
sources to light replace.
OPTIONAL REMOTE CONTROL UNITS
There are four optional remote controls that
can be purchased separately for this log
heater:
• wall switch
• wall thermostat
• hand-held ON/OFF remote
• hand-held thermostat remote
See Accessories, page 34.
OPTIONAL BLOWER ASSEMBLY


This replace accepts an optional blower as-
sembly (not included). The GA3700T Series
blower operates thermostatically and features
a variable speed control. The GA3700 Series
blower operates manually and also features a
variable speed control. The blower circulates
heated air from the replace into the room.
See Accessories, page 34.

www.desatech.com 113109-01G6
WARNING: This heater shall
      
-
    
 -
National Fuel Gas
Code, ANSI Z223.1/NFPA 54, the
International Fuel Gas Code, or


     
  

Today’s homes are built more energy efcient
than ever. New materials, increased insulation
and new construction methods help reduce
heat loss in homes. Home owners weather
strip and caulk around windows and doors
to keep the cold air out and the warm air in.
During heating months, home owners want
their homes as airtight as possible.
While it is good to make your home energy efcient,
your home needs to breathe. Fresh air must enter
your home. All fuel-burning appliances need fresh
air for proper combustion and ventilation.
Exhaust fans, replaces, clothes dryers and
fuel burning appliances draw air from the house
to operate. You must provide adequate fresh
air for these appliances. This will insure proper
venting of vented fuel-burning appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 6 through 8 will help
you classify your space and provide adequate
ventilation.

The air that leaks around doors and windows
may provide enough fresh air for combustion
and ventilation. However, in buildings of un-
usually tight construction, you must provide
additional fresh air.
AIR FOR COMBUSTION AND VENTILATION

construction where:
 -
    
      
2

and
 
and
      
     


    


If your home meets all of these three criteria,

Ventilation Air From Outdoors
If your home does not meet all of the three
    Determining
Fresh-Air Flow For Heater Location

The National Fuel Gas Code, ANSI Z223.1/
NFPA 54 denes a conned space as a space
whose volume is less than 50 cubic feet per
1,000 Btu per hour (4.8 m3 per kw) of the ag-
gregate input rating of all appliances installed
in that space and an unconned space as a
space whose volume is not less than 50 cubic
feet per 1,000 Btu per hour (4.8 m3 per kw)
of the aggregate input rating of all appliances
installed in that space. Rooms communicating
directly with the space in which the appliances
are installed*, through openings not furnished
with doors, are considered a part of the un-
conned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION


Use this work sheet to determine if you have
a conned or unconned space.
 Includes the room in which you will
install replace plus any adjoining rooms with
doorless passageways or ventilation grills
between the rooms.

www.desatech.com
113109-01G 7
1. Determine the volume of the space (length
x width x height).
Length x Width x Height =__________cu. ft.
(volume of space)
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2560 cu. ft.
(volume of space)
If additional ventilation to adjoining room
is supplied with grills or openings, add the
volume of these rooms to the total volume
of the space.
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
________ (volume of space) x 20 = (Maxi-
mum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) x 20
= 51,200 (maximum Btu/Hr the space can
support)
3. Add the Btu/Hr of all fuel burning appliances
in the space.
Vent-free replace __________ Btu/Hr
Gas water heater* __________ Btu/Hr
Gas furnace __________ Btu/Hr
Vented gas heater __________ Btu/Hr
Gas replace logs __________ Btu/Hr
Other gas appliances* + _________ Btu/Hr
Total = _________ Btu/Hr
* Do not include direct-vent gas appliances.
Direct-vent draws combustion air from the
outdoors and vents to the outdoors.
Example:
Gas water heater __________ Btu/Hr
Vent-free replace + _________ Btu/Hr
Total = _________ Btu/Hr
4. Compare the maximum Btu/Hr the space
can support with the actual amount of Btu/
Hr used.
_______ Btu/Hr (maximum the space can
support)
_______ Btu/Hr (actual amount of Btu/Hr
used)
Example: 51,200 Btu/Hr (maximum the
space can support)
73,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the above example is a conned
space because the actual Btu/Hr used is more
than the maximum Btu/Hr the space can sup-
port. You must provide additional fresh air. Your
options are as follows:
A. Rework worksheet, adding the space of an
adjoining room. If the extra space provides an
unconned space, remove door to adjoining
room or add ventilation grills between rooms.
See Ventilation Air From Inside Building.
40,000
33,000
73,000
AIR FOR COMBUSTION AND VENTILATION
Continued
Figure 3 - Ventilation Air from Inside
Building
Or
Remove
Door into
Adjoining
Room,
Option
3
Ve ntilation Grills
Into Adjoining Room,
Option 2
Ve ntilation
Grills
Into Adjoining
Room,
Option 1
12"
12"
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors, page 8.
C. Install a lower Btu/Hr replace, if lower Btu/Hr
size makes room unconned.
If the actual Btu/Hr used is less than the maximum
Btu/Hr the space can support, the space is an
unconned space. You will need no additional
fresh air ventilation.
WARNING: If the area in
-




    
National Fuel Gas Code, ANSI
Z223.1/NFPA 54, the Internation-
al Fuel Gas Code,

VENTILATION AIR

This fresh air would come from an adjoining
unconned space. When ventilating to an
adjoining unconned space, you must provide
two permanent openings: one within 12" of the
ceiling and one within 12" of the oor on the
wall connecting the two spaces (see options
1 and 2, Figure 3). You can also remove door
into adjoining room (see option 3, Figure 3).
Follow the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, Air for Combustion and
Ventilation for required size of ventilation
grills or ducts.

www.desatech.com 113109-01G8
INSTALLATION
WARNING: Never install the

 
 
   
   




 
 
-
    
currents move heat to wall sur-

     
   
   
     
smoke, aromatic candles, clean-



Figure 4 - Ventilation Air from Outdoors
Outlet
Air
V e ntilated
Attic
Outlet
Air
Inlet
Air
Inlet Air V e ntilated
Crawl Space
T o
Crawl
Space
T o Attic
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma-
nent openings: one within 12" of the ceiling
and one within 12" of the oor. Connect these
items directly to the outdoors or spaces open
to the outdoors. These spaces include attics
and crawl spaces. Follow the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation for required size
of ventilation grills or ducts.
IMPORTANT: Do not provide openings for
inlet or outlet air into attic if attic has a thermo-
stat-controlled power vent. Heated air entering
the attic will activate the power vent.
AIR FOR COMBUSTION AND VENTILATION
Continued
NOTICE: This heater is intended
    


     -








  -
    -

WARNING: Make sure the
-


www.desatech.com
113109-01G 9
Figure 5 - Installing Hood to Firebox
Note: Your replace is designed to be used in
zero clearance installations. Wall or framing ma-
terial can be placed directly against any exterior
surface on the rear, sides or top of your replace,
except where standoff spacers are integrally at-
tached. If standoff spacers are attached to your
replace, these spacers can be placed directly
against wall or framing materials.
Use the dimensions shown for rough openings
to create the easiest installation. See Built-In
Fireplace Installation, page 12.
IMPORTANT: Vent-free heaters add moisture
to the air. Although this is benecial, installing
replace in rooms without enough ventilation
air may cause mildew to form from too much
moisture. See Air for Combustion and Ventila-
tion, page 6.
IMPORTANT: Make sure the replace is level.
If replace is not level, log set will not work
properly.

Use the correct gas type (natural or propane/
LP) for your replace. If your gas supply is not
correct, do not install replace. Call dealer
where you bought replace for proper type
replace.



-






This replace accepts a blower assembly with
an electrical cord. The electrical cord is ve feet
in length. You must locate replace within reach
of a 120 volt grounded electrical outlet. If not,
you must install an electrical outlet within reach
of replace power cord. The GA3555 outlet
accessory is used for built-in applications with
blower accessory installed.
INSTALLING HOOD
Install hood to top of rebox as shown in
Figure 5. Use 3 Phillips screws provided.
INSTALLATION
Continued
Figure 6 - Assembling Perimeter Trim
Side Trim
Top
Trim
Slot
Mitered
Edge
Slot
Shim
Set Screws
Adjusting
Plate
ASSEMBLING AND ATTACHING
OPTIONAL PERIMETER TRIM

IMPORTANT: If you are recessing the re-
box in a wall, do not attach perimeter trim at
this time. See Built-In Fireplace Installation,
page 12.
Note: The instructions below show assembling
and attaching perimeter trim to replace.
1. Remove packaging from three pieces of
perimeter trim.
2. Locate four perimeter screws, two adjust-
ing plates with set screws and two shims
in the hardware packet.
3. Align shim under adjusting plate as shown
in Figure 6.
4. Slide one end of adjusting plate/shim in
slot on mitered edge of top perimeter trim
(see Figure 6).
5. Slide other end of adjusting plate/shim in
slot on mitered edge of side perimeter trim
(see Figure 6).
6. While rmly holding edges of perimeter trim
together, tighten both set screws on the
adjusting plate with slotted screwdriver.

www.desatech.com 113109-01G10
INSTALLATION
Continued
Figure 9 - Placing Hearth Base
Accessory Against Wall
Electrical
Outlet
Hearth
Base
Rigid
Gas
Line
Gas
Line
Access
Hole
Figure 8 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
Example
*
INSTALLATION CLEARANCES
WARNING: Maintain the
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Carefully follow the instructions below. This
will ensure safe installation.
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A. Clearances from the side of the replace
cabinet to any combustible material and
wall should follow diagram in Figure 8.
Example: The face of a mantel, bookshelf,
etc. is made of combustible material and
protrudes 3 1/2" from the wall. This com-
bustible material must be 4" from the side
of the replace opening (see Figure 8).
B. Clearances from the top of the replace
opening to the ceiling should not be less
than 42".
CONVENTIONAL FIREPLACE
INSTALLATION
Conventional installation of this fireplace
involves installing replace along with the
corner, face or cabinet mantel with hearth
base accessories against a wall in your home.
Follow the instructions below to install the
replace in this manner.
1. Assemble cabinet mantel, hearth base
and trim accessories. Assembly instruc-
tions are included with each accessory.
2. When installing blower, install a properly
grounded, 120 volt three-prong electrical
outlet at replace location if an outlet is not
there. If possible, locate outlet so cabinet
mantel will cover it when installed (see
Figure 9).
Figure 7 - Attaching Perimeter Trim to
Fireplace
Trim
Hanging
Screws
Assembled
Trim
Hanging
Notches
on Trim
7. Repeat steps 1 through 6, page 9, for
other side.
8. Tighten trim hanging screws (#10 x 6.25
shoulder) into holes in cabinets. Place
the assembled trim onto replace cabinet.
Align hanging notches on trim with hang-
ing screws on side of replace (see Figure
7). Push trim rmly into place, sliding
hanging notches over hanging screws.
MINIMUM CLEARANCE TO
COMBUSTIBLE MATERIALS
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