Monessen Hearth Vent Free Insert DIS33G User manual

       
      


        
     

 
  
  

     
 

  

     
    







This is an unvented gas-red 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 Page
7.



23D8020 7/11 Rev. 7

DIS33G Vent Free Gas Fireplace System
223D8020

 
Codes ...................................................................... 4
 
Operation ................................................................ 5
Gas Pressures ........................................................ 5
Gas Specications .................................................. 5
Ignition Controls ...................................................... 5
Pilot ......................................................................... 5
Thermal Generator .................................................. 5
Framing Dimensions ............................................... 6
 
Getting Started ........................................................ 7
What You Will Need to Get Started ......................... 7
 
 
Remove Screen .................................................... 10
Install Canopy ....................................................... 1
Secure Heater to Floor .......................................... 11
 
 
 
Connect Optional Wall Switch or Thermostat ....... 14
Connect Remote Receiver .................................... 15
Check System Operation ...................................... 15
 
 
 
 
What to Do if You Smell Gas ................................. 22
Millivolt Control Lighting Instructions ..................... 23
To Turn Off Gas to Heater ..................................... 23
Match Lighting Instructions ................................... 24
 
 
 
 
Firebox Assembly ................................................. 28
Grate and Base Assembly ................................... 30
Logs ...................................................................... 32
 






DIS33G Vent Free Gas Fireplace System
23D8020 3
13. Avoid any drafts that alter burner ame patterns. Do not
allow fans to blow directly into replace. Do not place
a blower inside burn area of rebox. Ceiling fans may
create drafts that alter burner ame patterns. Sooting
and improper burning will occur.
14. : Candles, incense, oil lamps, etc. produce
combustion byproducts including soot. Vent-free
appliances will not lter or clean soot produced by
these types of products. In addition, the smoke and/or
aromatics (scents) may be reburned in the vent-free
appliance which can produce odors. It is recommended
to minimize the use of candles, incense, etc. while the
vent-free appliance is in operation.
15. This is an unvented gas-fired heater. It uses air
(oxygen) from the room in which it is installed. Provi-
sions for adequate combustion and ventilation air must
be provided. Page 7
16. This heater shall not be installed in a room or space
unless the required volume of indoor combustion air is
provided by the method described in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, the International
Fuel Gas Code or applicable local codes.
17. Keep room area clear and free from combustible
materials, gasoline and other ammable vapors and
liquids.
18. Unvented gas heaters are a supplemental zone heater.
They are not intended to be the primary heating appli-
ance.
19. Unvented gas heaters emit moisture into the living
area. In most homes of average construction, this
does not pose a problem. In houses of extremely
tight construction, additional mechanical ventilation is
recommended.
20. During manufacturing, fabricating and shipping, various
components of this appliance are treated with certain
oils, lms or bonding agents. These chemicals are not
harmful but may produce annoying smoke and smells
as they are burned off during the initial operation of the
appliance; possibly causing headaches or eye or lung
irritation. This is a normal and temporary occurrence.

1. Due to high temperatures, the appliance should be
located out of trafc and away from furniture and
draperies.
2. Children and adults should be alerted to the hazard
of high surface temperature and should stay away
to avoid burns or clothing ignition.
3. Young children should be carefully supervised when
they are in the same room with the appliance.
4. Do not place clothing or other ammable material
on or near the appliance.
5. Any safety screen or guard removed for servicing
an appliance, must be replaced prior to operating
the heater.
6. Installation and repair should be done by a qualied
service person.
7. To prevent malfunction and/or sooting, an unvented
gas heater should be cleaned before use and at
least annually by a professional service person.
More frequent cleaning may be required due to
excessive lint from carpeting, bedding materials,
etc. It is imperative that control compartments,
burners and circulating air passageways be kept
clean.

Please leave these instructions with the appliance.

Please retain these instructions for future reference .

 
 

 

 

8.    Early signs of
carbon monoxide poisoning are similar to the u with
headaches, dizziness and/or nausea. If you have these
signs, obtain fresh air immediately. Have the heater
serviced as it may not be operating properly.
9. The installation must conform with local codes or, in
the absence of local codes, with the  

10. This unit complies with the latest edition of ANSI
Z21.11.2, Unvented Heaters.
11. Do not install the heaters in a bathroom or bedroom.
12. Correct installation of the ceramic ber logs, proper
location of the heater, and annual cleaning are neces-
sary to avoid potential problems with sooting. Sooting,
resulting from improper installation or operation, can
settle on surfaces outside the replace. See log place-
ment instructions for proper installation.

DIS33G Vent Free Gas Fireplace System
423D8020

The initial break-in operation should last two to three
hours with the burner at the highest setting. Provide
maximum ventilation by opening windows or doors to
allow odors to dissipate. Any odors remaining after this
initial break-in period will be slight and will disappear
with continued use.
21. Input ratings are shown in BTU per hour and are for
elevations up to 2,000 feet. For elevations above 2,000
feet, input ratings should be reduced 4 percent for each
1,000 feet above sea level. Refer to the National Fuel
Gas Code.
22. The appliance and its appliance main gas valve must
be disconnected from the gas supply piping system
during any pressure testing of that system at test pres-
sures in excess of 1/2 psig (3.5 kPa).
23. The appliance must be isolated from the gas supply
piping system by closing its equipment 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).
24. Do not use this room heater if any part has been under
water. Immediately call a qualied 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.
25. Never burn solid fuels in a replace where a unvented
room heater is installed.
26. Always have a replace screen in place when the
appliance is in operation and, unless other provisions
for combustion air are provided, the screen must have
an opening(s) for induction of combustion air.
  
  
   


      
    





Nous recommandons que nos
appareils de chauffage au gaz
soient installés et entretenus par
des professionnels qui ont été
accrédités aux È.U. par le National
Fireplace Institute ® (NFI) comme
étant des spécialistes du NFI en
matièred’appareils de chauffage
au gaz.

Adhere to all local codes or, in their absence, the latest edition of THE NATIONAL FUEL GAS CODE
ANSI Z223.1 or NFPA54 which can be obtained from…

1430 Broadway
New York, NY 10018
or

Batterymarch Park
Quincy, MA 02269

DIS33G Vent Free Gas Fireplace System
23D8020 5
Your vent-free replace must be mounted to the oor or
the replace hearth.

This unvented gas heater requires no outside venting and
burns cleanly with high heating efciency.

FP2769
DIS33 product features
Piezo
Ignitor
Fireplace
Screen
Control Knobs
Optional
Face Plate
Figure 1 -
Unvented Gas Heater with Control Access Door Open
On/Off
Switch Blower
Optional T-stat
Sensor
FP2769

   
Regulator Pressure Natural 3.5” w.c.
Pilot Regulator Natural 3.5” w.c.
Max. Inlet Pressure Natural 10.5” w.c.
Min. Inlet Pressure Natural 5.0” w.c.
Regulator Pressure LP 10.0” w.c.
Max. Inlet Pressure LP 13.0” w.c.
Min. Inlet Pressure LP 11.0” w.c.


      
DIS33NTG Natural Millivolt 28,000 19,000
DIS33PTG LP Millivolt 28,000 23,000
DIS33NVG Natural T-Stat 28,000 19,000
DIS33PVG LP T-Stat 28,000 23,000

 For LP models an external regulator is required
to reduce supply pressure to a maximum of 13" w.c.

Piezo ignitor allows ignition of the pilot without the use of
matches or batteries.

 - All gas to the gas logs is shut off at the
valve.
 - Valve position to light/maintain a standing
pilot.
 - Valve position to turn ON/OFF log set with
remote switch/thermostat.
 - Variable position to control ame height
(heat output). Both front and rear burners
are in operation to provide realistic glow
and yellow ame.

The gas log heater is tted with a specially designed safety
pilot light (ODS assembly) which senses the amount of
oxygen available in the room and shuts the gas log heater
off if the oxygen level begins to drop below a satisfactory
level. The pilot can only be relit when adequate fresh air
is available.

The milli-volt gas log pilot is tted with a milli-volt generator
to provide power for remote activation.

DIS33G Vent Free Gas Fireplace System
623D8020
3356O” Rough Opening Width
Rough
Opening
Depth
1/2”
or 5/8”
Rough
Opening
Height
238020
DIS33G dims
16”
3756M”
31(6”
6456M”
3756M”
2756O”
3356O” Rough Opening Width
Rough
Opening
Depth
1/2”
or 5/8”
Rough
Opening
Height
16”
3756M”
31(6”
6456M”
3756M”
2756O”

Figure 2 -
Framing Dimensions
If unit is to be “built in,” replace framing can be built before
or after the appliance is set in place. 
     
   
    Construct replace framing
following Figure 2. Refer to Figure 5 on Page 9 for replace
dimensions. The framing headers may not rest directly on
top of the rebox.
The replace may be installed directly on a combustible
oor or a raised platform of an appropriate height. Do
not place replace on carpeting, vinyl, tile or other soft
oor coverings. It may, however, be placed on at wood,
plywood, particle board or other hard surfaces. Be sure
replace rests on a solid continuous oor or platform with
appropriate framing for support and so that no cold air can
enter from under the rebox.

DIS33G Vent Free Gas Fireplace System
23D8020 7


Make sure you have received all parts
Check your packing list to verify that all listed parts have
been received. You should have the following:
• Installation/Operating instructions
• Black Louvers (5)
• 33" unvented gas heater with brick panels.
• Canopy
• Volcanic rock and rock wool
• Two (2) anchoring screws
• Mounting screws for canopy
• Log box (refer to installation instructions)
Accessory face plates available to nish the insert.
• DIFACESM Black small face 33"H x 43"W
• DIFACELG Black large face 36"H x 50"W
Accessories include brass trim and mounting hardware
The millivolt controlled version of this heater is the only
style designed to be operated with optional devices for
ON/OFF functions. The following options may be used
with the milli-volt controlled heater. These options are not
packaged with the log set.
• Hand held Remote with Receiver
• Wall switch with 15' wire.
• Wall T-stat with 15' wire.
• Hand held Thermostat Remote with Receiver
• Thermostat Sensor
Carefully inspect the contents for shipping damage. If any
parts are missing or damaged, immediately inform the
dealer from whom you purchased the appliance. Do not
attempt to install any part of the appliance unless you have
all parts in good condition.

You must have the following items available before pro-
ceeding with installation…
• External regulator (for propane / L.P.G. and 1/2 lb.
Natural Gas Systems only)
• Piping which complies with local codes
• Sediment trap
• Tee joint
• Pipe wrench or appropriate size crescent wrench
set
• Phillips head screwdriver
• Drill with 5/32" bit
• Optional face plate kit.
• Manual shutoff valve
• Optional trim kit for installation into wall or free stand-
ing mantel without three piece faceplate
• Pipe sealant approved for use with propane / LPG
(Resistant to sulfur compounds)

 


 

      



 


 
 

        


      
      National
Fuel Gas Code, ANSI Z223.1/NFPA 54 
International Fuel Gas Code  


DIS33G Vent Free Gas Fireplace System
823D8020


            
   minimum clearances   


Follow these instructions carefully to ensure safe installation. Failure to
follow instructions exactly can create a re hazard.
 Clearances are necessary to combustible surfaces
only. No clearance is necessary for noncombustible sur-
face.
 The clearance from the inside of the
appliance to any combustible adjacent wall should no be
less than 9". Figure 3
 The ceiling must be at least 42" from
the top of the rebox opening. Figure 3
 The appliance can be placed against
the combustible back wall.
 The replace may not be installed onto
any combustible ooring material, such as carpeting, vinyl
or tile without the hearth or a minimum 22 GA (0.030") metal
or a minimum 1/2" wooden base covering the entire width
and depth of the base.
 The canopy supplied with the unit must
be installed. If a combustible mantel is installed. It must
meet the clearance requirements shown in Figure 6.
FP2770
sidewall ceiling clearances
9"
Minimum
9"
Minimum
42"
Minimum
Figure 3 -
Sidewall and Ceiling Minimum Clearances
FP2770
33"
1556M"
22
6M
"
23(6"
B
A
FP2771
Fireplace install

A B
Small 33" 43"
Large 36" 50"
Figure 4 -
Dimensions for Installing in Masonry Fireplace
or UL Listed Box
FP2771


Have replace oor and chimney professionally cleaned to
remove ashes, soot, creosote or other obstructions. Close
and seal any fresh air vents or ash clean-out doors located
on oor or wall

DIS33G Vent Free Gas Fireplace System
23D8020 9




Heat resistant material (minimum requirements) with
wooden mantel or other combustible projection:
To install the heater with a wooden mantel shelf or other
combustible projection above, rst measure the heat resis-
tant material shown in Figure 5.
FP2772
mantel material
No combustible
materials within 8"
of opening.
Do not cover
louvers.
Hood
Grate
FP2772
Figure 5 -
Measure Heat Resistant Material for Mantel
 A mantel may
project from the wall a maxi-
mum of 2Z\x" at minimum
of 8" above the opening,
and a maximum of 12" at a
minimum of 26" above the
opening.
10"
12"
14"
26"
8"
12"
10"
8"
6"
256O”
FP2773
Min mantel clearances
Figure 6 -
Minimum Mantel Clearances
FP2773
Figure 7 is an example of an unsafe mantel installation.
The mantel projects 4" at 8" above the opening, exceed-
ing the maximum acceptable distance of 2Z\x". The mantel
also projects 8" at 10" above the opening, exceeding the
maximum acceptable distance of 6".
If your mantel prole is unsafe, you may either:
• Raise the mantel to an acceptable height or,
• Remove the mantel.
8"
4"
21/2"
10"
6"
8"
FP2774
unsafe mantel
Hood
No combustible
materials within 8" of
opening.
Do not cover louvers.
FP2773
Figure 7 -
Unsafe Mantel Clearances

DIS33G Vent Free Gas Fireplace System
10 23D8020

The gas log heater must be installed at least 5" above
any combustible ooring material, such as carpeting or
tile, which is closer than 14" to the base of the replace.
Figure 8
5"
1”
FP2775
min clearance above comb floor
Combustible
Material
Noncombustible
Material
Figure 8 -
Minimum Clearance above
Combustible Flooring
FP2775

Remove replace screen by pushing screen frame panel
up and out. Figure 9
 Fireplace screen must be removed to access log
box and to install canopy.



FP2776
remove screen
Figure 9 -
Remove Fireplace Screen
FP2776

1. Remove the replace screen as described in the previ-
ous section.
2. Align canopy with the holes in the top frame assembly.
Figure 10
3. Install the ve (5) screws (in owner’s manual packag-
ing) which attach the canopy to the top frame assembly.
Figure 10
4. Tighten all screws. Make sure the canopy is level and
secure. Install the replace screen.
FP2777
install canopy
Figure 10 -
Install Canopy
FP2777