Desa Tech CMH2800TPC, VMH2800TPC Owner's Manual
®
VENT-FREE PROPANE/LP GAS
MINI-HEARTH® HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
®
Shown With Optional Mantel
Which Features a Built In Base
14,000 to 28,000 Btu/Hr with Thermostat “C” Models
VMH2800TPC
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result causing property damage, personal injury, or loss of life.
— Do not store or use gasoline or other flammable
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
fire department.
— Installation and service must be performed by a
qualified installer, service agency, or the gas supplier.
This appliance may be installed in an aftermarket* manufactured (mobile) home,
where not prohibited by state or local codes.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer. (I.E.
Installation of this product is permitted after the manufactured (mobile) home is sited)
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.
Save this manual for future reference.
WARNING: Improper installation,
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.
WARNING: This is an unvented
gas-fired heater. It uses air (oxygen) from the room in which it is
installed. Provisions for adequate
combustion and ventilation air
must be provided. Refer to
Combustion and Ventilation
tion in this manual.
Air for
sec-
®
GAS RESIDENTIAL HEATERS
SAFETY
INFORMATION
WARNINGS
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, operate, or service this heater. Improper use of this heater can
cause serious injury or death from
burns, fire, explosion, electrical
shock, and carbon monoxide
poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs
of carbon monoxide poisoning resemble the
flu, with headaches, dizziness, or nausea. If
you have these signs, the heater may not be
working properly. Get fresh air at once!
Have heater serviced. Some people are
more affected by carbon monoxide than
others. These include pregnant women,
people with heart or lung disease or anemia,
those under the influence of alcohol, and
those at high altitudes.
Propane/LP Gas: Propane/LP gas is odor-
less. An odor-making agent is added to
propane/LP gas. The odor helps you detect
a propane/LP gas leak. However, the odor
added to propane/LP gas can fade. Propane/
LP 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 heater.
WARNING: Any change to
this heater 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.
2. Do not place propane/LP supply
tank(s) inside any structure. Locate
propane/LP supply tank(s) outdoors.
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 fire department
4. This heater shall not be installed in a
bedroom or bathroom.
5. Never install the heater
• in a recreational vehicle.
• where curtains, furniture, clothing, or
other flammable objects are less than
36 inches from the front, top, or sides
of the heater.
• as a fireplace insert.
• in high traffic areas.
• in windy or drafty areas.
6. This heater needs fresh, outside air ventilation to run properly . This heater has
an oxygen depletion sensor (ODS) pilot light safety system. The ODS shuts
down the heater if not enough fresh air
is available. See Fresh Air for Combus-
tion and V entilation, pages 5 through 7.
7. If heater shuts off, do not relight until
you provide fresh, outside air. If heater
keeps shutting off, have it serviced.
8. Do not run heater
• where flammable liquids or vapors
are used or stored.
• under dusty conditions.
9. Never place any objects on the heater.
10. Surface of heater becomes very hot
when running heater. Keep children and
adults away from hot surface to avoid
burns or clothing ignition. Heater will
remain hot for a time after shut-down.
Allow surface to cool before touching.
11. Carefully supervise young children
when they are in same room with heater.
12. Make sure screen is in place before running heater.
13. Do not use heater if any part has been
under water. Immediately call a qualified service technician to inspect the
room heater and to replace any part of
the control system and any gas control
which has been under water.
14. Turn off and unplug heater and let cool
before servicing. Only a qualified service
person should service and repair heater.
15. Operating heater above elevations of
4,500 feet could cause pilot outage.
16. WARNING: Do not use a blower insert,
heat exchanger insert, or other accessory
not approved for use with this heater.
17. WARNING: To prevent performance
problems, do not use a propane fuel
tank of less than 100 lbs. capacity.
LOCAL CODES
Install and use heater with care. Follow all
local codes. In the absence of local codes, use
the latest edition of The National Fuel Gas
Code ANSI Z223, also known as 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
PRODUCT
FEATURES
Safety Device
This heater has a pilot with an Oxygen
Depletion Sensor Shutoff System (ODS).
The ODS/pilot is a required feature for
vent-free room heaters. The ODS/pilot shuts
off the heater if there is not enough fresh air.
Piezo Ignition System
This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.
Thermostatic Heat Control
This heater has a thermostat sensing bulb
and a control valve. This results in the
greatest heater comfort. This can also result
in lower gas bills.
2
103507
OWNER’S MANUAL
PRODUCT
IDENTIFICATION
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Screen
Front
Panel
Figure 1 - Vent-Free Gas Log Propane/LP Gas Space Heater
UNPACKING
1. Remove heater from carton.
2. Remove all protective packaging applied to heater for shipment.
3. Make sure your heater includes two
hardware packets.
4. Check heater for any shipping damage.
If heater is damaged, promptly inform
dealer where you bought heater.
ASSEMBLY
ASSEMBLING HEATER
Tools Required: Phillips screwdriver, 5/16"
hex wrench, and slotted screwdriver
Removing Front Panel Of Heater
1. Remove two screws near bottom corners of front panel with Phillips screwdriver.
2. Pull bottom of front panel forward, then
down (see Figure 2) .
103507
Figure 2 - Removing Front Panel of Heater
Installing Log
Note:
For easier installation, lay heater on
its back.
1. Remove log from inside top of heater.
Discard protective packaging.
2. Attach ignitor cable to piezo ignitor
(see Figure 3).
3. With Phillips screwdriver , remove four
screws holding screen in place. Remove
screen.
Piezo Ignitor
Ignitor
Cable
Figure 3 - Attaching Ignitor Cable to Piezo
Ignitor
4. Gently slide log between log retaining
brackets on deflector assembly (see Figure 4, page 4). The log should fit firmly
against bottom of log retaining brackets.
5. Reattach screen using four screws removed in step 3.
Continued
3
®
GAS RESIDENTIAL HEATERS
ASSEMBLY
Continued
Front Panel
Screen
TrussHead
Screw
Nut
Brass
Front
Trim
Figure 4 - Assembling Heater
Log
Screw
Heater Cabinet
Screw
Brass Front Trim
Burner Shield
Front Panel
Deflector
Log
Retaining
Brackets
Side
Brass
Trim
Slot
Figure 6 - Assembling Brass Trim
Adjusting
Plate
Set
Screws
Shim
Mitered Edge
Top Brass
Trim
Slot
6. While firmly holding edges of brass
trim together, tighten both set screws
on the adjusting plate with slotted
screwdriver.
7. Repeat steps 1 through 6 for other side.
8. Place the assembled trim on front of
heater cabinet. Attach on top and sides
with four brass screws included in hardware package (see Figure 7).
Screws
Assembled
Brass Trim
WARNING: Always have
burner shield and screen in place
before operating heater. This prevents excessive temperatures on
heater surfaces.
Failure to position the parts in
accordance with these diagrams
or failure to use only parts specifically approved with this heater
may result in property damage or
personal injury.
Attaching Brass Front Trim to
Front Panel
1. Locate brass front trim in brass trim
package.
2. Slide the head of two truss-head screws
from hardware packet into each end of
brass front trim (see Figure 5).
3. Line up screws with holes in front panel
(see Figure 4). Insert screws in holes.
Attach nuts from inside of front panel.
Tighten with wrench.
Truss-Head
Screw
Figure 5 - Attaching Brass Front Trim to
Front Panel
Nut
Assembling and Attaching
Brass Trim
1. Remove packaging from three remaining pieces of brass trim.
2. Locate four brass screws, two adjusting 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 brass trim
(see Figure 6).
5. Slide other end of adjusting plate/shim
in slot on mitered edge of side brass
trim (see Figure 6).
Figure 7 - Attaching Brass Trim to Heater
9. Reattach front panel to heater if you are
going to mount the heater to the base.
Do not reattach front panel at this time
if you are going to mount heater to wall.
4
103507
OWNER’S MANUAL
FRESH AIR FOR
COMBUSTION AND
VENTILATION
WARNING: This heater shall
not be installed in a confined
space unless provisions are provided for adequate combustion
and ventilation air. Read the following instructions to insure
proper fresh air for this and other
fuel-burning appliances in your
home.
Today’s homes are built more energy efficient 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
efficient, 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, fireplaces, 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 fuelburning appliances.
PROVIDING ADEQUATE
VENTILATION
The following is exerpts from National Fuel
Gas Code. NFPA 54/ANSI Z223.1, Section
5.3, Air for Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classifications:
1. Unusually Tight Construction; 2. Unconfined Space; 3. Confined Space.
The information on pages 5 through 7 will
help you classify your space and provide
adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and windows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
Unusually tight construction is defined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a continuous water vapor retarder with a
rating of one perm (6x10
sec-m2) or less with openings
gasketed or sealed
b. weather stripping has been added
on openable windows and doors
and
c. caulking or sealants are applied to
areas such as joints around window and door frames, between sole
plates and floors, between wallceiling joints, between wall panels,
at penetrations for plumbing, electrical, and gas lines, and at other
openings.
If your home meets all of the three criteria
above, you must provide additional fresh
air. See Ventilation Air From Outdoors,
page 7.
If your home does not meet all of the three
criteria above, proceed to page 6.
and
-11
per pa-
Confined and Unconfined Space
The National Fuel Gas Code (ANSIZ223.1,
1992 Section 5.3) defines a confined 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 aggregate input rating of all
appliances installed in that space and an
unconfined 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
unconfined space.
* Adjoining rooms are communicating only
if there are doorless passageways or ventilation grills between them.
103507
5
®
GAS RESIDENTIAL HEATERS
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this worksheet to determine if you have a confined or unconfined space.
Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between
the rooms.
1. Determine the volume of the space (length x width x height).
Length x Width x Height = ________________ cu. ft. (volume of space)
Example:
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. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.
_________ (volume of space) ÷ 50 cu. ft. = (Maximum Btu/Hr the space can support)
Example:
3. Add the Btu/Hr of all fuel burning appliances in the space.
Example:
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.
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:
The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can
support. 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 unconfined space, remove door to adjoining
room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 7.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no
additional fresh air ventilation.
Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)
2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)
Vent-free heater ___________________ Btu/Hr
Gas water heater* ___________________ Btu/Hr
Gas furnace ___________________ Btu/Hr
Vented gas heater ___________________ Btu/Hr
Gas fireplace logs ___________________ Btu/Hr
Other gas appliances* + ___________________Btu/Hr
Total = ___________________Btu/Hr
Gas water heater 30,000 Btu/Hr
Vent-free heater + 28,000 Btu/Hr
Total = 58,000 Btu/Hr
51,200 Btu/Hr (maximum the space can support)
58,000 Btu/Hr (actual amount of Btu/Hr used)
6
103507
AIR FOR
COMBUSTION AND
VENTILATION
Continued
WARNING: If the area in which
the heater may be operated is
smaller than that defined as an
unconfined space, provide adequate combustion and ventilation air by one of the methods
described in the
Gas Code, ANSI Z223.1, 1992,
Section 5.3
codes
.
VENTILATION AIR
National Fuel
or applicable local
Ventilation
Grills
into Adjoining
Room,
Option 1
Or
Remove
Door into
Adjoining
Room,
Option 3
OWNER’S MANUAL
12"
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation Air From Inside
Building
This fresh air would come from an adjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must provide two permanent openings: one within
12" of the ceiling and one within 12" of the
floor on the wall connecting the two spaces
(see options 1 and 2, Figure 8). You can also
remove door into adjoining room (see option 3, Figure 8). Follow the National Fuel
Gas Code NFPA 54/ANSI Z223.1, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
WARNING: Rework worksheet,
adding the space of the adjoining
unconfined space. The combined
spaces must have enough fresh
air to supply all appliances in both
spaces.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two permanent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connect these items directly to the outdoors
or spaces open to the outdoors. These spaces
include attics and crawl spaces.
IMPORTANT:
inlet or outlet air into attic if attic has a
thermostat-controlled power vent. Heated
air entering the attic will activate the power
vent.
Do not provide openings for
12"
Figure 8 - Ventilation Air from Inside Building
Outlet
Air
Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air
Figure 9 - Ventilation Air from Outdoors
To Attic
To
Crawl
Space
Ventilated
Crawl Space
103507
7
®
GAS RESIDENTIAL HEATERS
INSTALLATION
NOTICE: A qualified service person must install heater. Follow
all local codes.
CHECK GAS TYPE
Use only propane/LP gas. If your gas supply
is not propane/LP, do not install heater. Call
dealer where you bought heater for proper
type heater.
INSTALLATION ITEMS
Before installing heater, make sure you have
the items listed below.
• external regulator (supplied by
installer, see page 20)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• ground joint union
• test gauge connection * (see Figure
21, page 12)
• sediment trap
• tee joint
• pipe wrench
* An A.G.A. design-certified manual shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Purchase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 20.
LOCATING HEATER
WARNING: Maintain the mini-
mum clearances shown in Figure
10. If you can, provide greater
clearances from floor, ceiling, and
joining wall.
You can locate heater on floor. The optional
hearth base is needed. You can also install
optional decorative mantels on the heater
(some mantels require the hearth base). I
PORTANT:
Only use optional mantels and
hearth base specified in this manual. Purchase the optional mantel and hearth base
from your dealer. See Accessories, pages 20
and 21.
The heater may also be mounted on a wall.
You cannot use optional mantel if mounting
heater on a wall.
M-
WARNING: Never install the
heater
• in a bedroom or a bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 36 inches
from the front, top, or sides of
the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
WARNING: This heater cre-
ates warm air currents. These
currents move heat to wall surfaces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities in the air (such
as tobacco smoke) exist, may
discolor walls.
CEILING
6"
Minimum
From
Sides Of
Heater
Left
Side
FLOOR
Figure 10 - Mounting Clearances As Viewed From Front of Heater
IMPORTANT:
ture to the air. Although this is beneficial,
installing heater in rooms without enough
ventilation air may cause mildew to form from
too much moisture. See Fresh Air for Com-
bustion and Ventilation, pages 5 through 7.
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must be
at least 18 inches above floor.
• locate heater where moving vehicle will not hit it.
For convenience and efficiency, install heater
• where there is easy access for
• in coldest part of room.
An optional fan kit is available from your
dealer. See Accessories, page 20. If planning to use fan, locate heater near an electrical outlet.
5"
Vent-free heaters add mois-
operation, inspection, and service.
36"
Minimum
Right
Side
Minimum To Top Surface
Of Carpeting, Tile Or Other
Combustible Material
8
103507
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