Monessen Hearth NB18 User manual
81D0107 12/11 Rev. 9
810107
NB18/24 cover
2
NB18/NB24 Gas Log Set
Codes .......................................................................3
Gas Pressures .........................................................5
Ignition Controls - Millivolt ........................................5
Pilot/ODS .................................................................5
Thermal Generator ...................................................5
NB, NBSC Models ................................................12
Millivolt ...................................................................13
Optional Wall Switch or Thermostat .......................14
Connect Remote Receiver .....................................15
Check System Operation .......................................15
Cast Iron Grate Installation ....................................16
Rock Wool Placement ............................................17
Berkley Oak Log Placement .................................17
Ember and Rock Placement ..................................19
Stoney Creek Log Placement ................................20
For Your Safety Read Before Lighting ...................24
Millivolt Control Lighting Instructions ......................25
To Turn Off Gas to Heater ......................................25
Match Lighting Instructions ....................................26
Command Center Wall Installation .........................27
Wall Switch Installation ..........................................27
Wiring Diagram - SCS ............................................28
For Your Safety Read Before Lighting ...................29
Operating Instructions ............................................30
To Turn Off Gas to Appliance .................................30
Millivolt Control System ..........................................40
Signature Command System .................................42
Burner Assembly - Millivolt .....................................43
Burner Assembly - SCS .........................................44
Berkeley Oak Refractory Logs ...............................45
Stoney Creek Refractory Logs ...............................46
Please read the Installation and Operation Instructions before using the appliance!
Read all instructions and warnings carefully before starting installation.
Failure to follow these instructions may result in a possible re hazard and will void the warranty.
3
NB18/NB24 Gas Log Set
Please leave these instructions with the appliance.
Please retain these instructions for future reference
.
1. Due to high temperatures, the appliance should be
located out of trafc 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 qualied
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 fre-
quent cleaning may be required due to excessive lint
from carpeting, bedding material, etc. It is imperative
that control compartments, burners and circulating air
passageways be kept clean.
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. The NB(18,24) and NB(18,24)SC units comply with
ANSI Z21.11.2 Unvented Heaters, latest edition and
also complies with ANSI Z21.60 Decorative Vented
Appliances for Solid Fuel Burning Fireplaces, latest
edition. The NB(18,24)SCR units comply with ANSI
Z21.11.2 Unvented Heaters, latest edition ONLY.
Read these instructions carefully before installing or trying to operate this vent-free gas heater.
State and local codes may only allow operation of
this appliance in a vented conguration. Check your
state or local codes. For vented operation, see “Vented
Instructions” in this manual.
11. Do not install the heaters in a bathroom or bedroom.
12. Correct installation of the logs, proper location of the
heater, and annual cleaning are necessary to avoid
potential problems with sooting. Sooting, resulting
from improper installation or operation, can settle on
surfaces outside the replace. See log placement
instructions for proper installation.
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 by-products 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.
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
, the
or applicable local codes.
17. Keep room area clear and free from combustible
materials, gasoline and other ammable vapors and
liquids.
4
NB18/NB24 Gas Log Set
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.
The initial break-in operation should last four hours to
properly cure logs and rock wool, 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 qualied 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. This appliance must not be used with glass doors in
the closed position. This can lead to pilot outages and
severe sooting outside the replace.
26. Never burn solid fuels in a replace where a unvented
room heater is installed.
27. 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.
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
National
Fuel Gas Code, ANSI Z223.1/NFPA 54
International Fuel Gas Code
5
NB18/NB24 Gas Log Set
Check your packing list to verify that all listed parts have
been received. You should have the following:
• Unvented Gas Log Burner Assembly
• Two (2) Plastic Bags Containing Crushed Volcanic
Rock
• Installation/Operating Instructions
• Two (2) Anchoring Screws
• Ceramic Fiber Logs / Refractory Logs
• Rock wool & Bright Embers
• Grate Assembly
• On/Off Log Switch Assembly (MV Models Only)
• Thermostat Remote Control (SCR Models Only)
• ‘AA’ Batteries (SC Models only)
The following options may be used with the millivolt con-
trolled heater. These options are not packaged with the
log set.
• Hand Held Remote with Receiver (MV)
• Wall Thermostat with 15' Wire
• Wall Switch with 15' Wire
Carefully inspect the contents for shipping damage. If any
parts are missing or damaged, immediately inform the
dealer from whom you purchased the appliance.
You should have the following items available before pro-
ceeding with installation:
• External regulator (for propane/LPG and 1/2 psi
natural gas systems only)
• Piping which complies with local codes
• Sediment trap (recommended)
• Screwdriver
• Tee joint.
• Pipe sealant approved for use with propane/LPG
(Resistant to sulfur compounds)
• Drill with 5/32 masonry bit
• Pipe wrench or appropriate size crescent wrench
set
• Manual shutoff valve
An external regulator is required to reduce supply
pressure to a maximum of 10Z\x" w.c. on natural gas sys-
tems operating at higher pressure.
An external regulator is required to reduce supply
pressure to a maximum of 13" w.c.
Natural Propane (LP)
Inlet Minimum 5.0” w.c. 11.0” w.c.
Inlet Maximum 10.5” w.c. 13.0” w.c.
Regulator Pressure Setting 3.5” w.c. 11.0” w.c.
Pilot Regulator 3.5” w.c. n/a
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 stand-
ing pilot.
- Valve position to turn ON/OFF log set
with remote switch/thermostat.
- Variable position to control ame height
(heat output).
Refer to Page 28
The gas log heater is tted with a specially designed
safety pilot (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 millivolt gas log pilot is tted with a millivolt
(thermopile) generator to provide power for remote
activation.
NB18 Natural 28,000 19,000
NB24 Natural 37,000 25,000
NB18 LP 27,000 22,000
NB24 LP 36,000 28,000
6
NB18/NB24 Gas Log Set
Exception:
The NB and NBSC/SCR Series unvented room heaters
are approved for installation into the following unvented
replaces:
The NB and NBSC/SCR Series unvented room heaters
may also be installed into a Ventless Firebox Enclosure for
Gas Fired Decorative Type Unvented Room Heaters per
ANSI Z21.91 (typically referred to as a "Universal Firebox"),
as long as rebox hearth dimensions meet the minimum
hearth dimensions shown below.
A
C
D
B
Figure 1 -
Minimum Hearth Dimensions
NB18 w/18” Log 26” 13” 18” 17”
NB24 w/24” Log 29” 13” 22Z\v” 17”
NB24 w/30” Log 33” 13” 25Z\v” 17”
NB18SC,SCR w/18” Log 28Z\x” 13” 20Z\v” 17”
NB24SC/SCR w/24” Log 31” 13” 25Z\v” 17”
NB24SC/SCR w/30” Log 35” 13” 25Z\v” 17”
The following are guidelines for placing a gas log set in
a replace that has a restrictive barrier along the bottom
front opening of the replace. Some examples of barri-
ers are glass/screen door frames and sunken/recessed
replaces.
No Restriction 13”
0” to 1Z\x” 16”
Greater than 1Z\x” to 3” 16”
Greater than 3” *
*Any barrier greater than 3” placed in front of the gas log
set is not recommended by the manufacturer.
Non combustible material such as refractory brick
may be used to line the oor of the replace in order to raise
the height of the gas log set in relation to a restrictive barrier.
If the unit is raised, the minimum height dimension listed in
the homeowner’s manual must not be exceeded.
If the log set is equipped with a remote receiver, a
restrictive barrier may reduce the battery life by increasing
the ambient temperature inside the replace. Placement
of the receiver outside of the replace will extend the
battery life.
FP2252
set in enclosure
Glass door frames
with adjustable
louvers should have
the louvers fully
open while the unit
is in operation
Height of restrictive barrier
caused by glass door frames,
recessed replaces, etc. from
the base or bottom surface of
the unit. (Refer to Table) Depth of Fire-
place/Firebox
Refer to Table
The log set should be
placed against or as
near as possible to the
rear wall of the replace/
rebox.
FP2252
Figure 2 -
Reference Drawing of a Natural Flame Log
Set in an Enclosure
7
NB18/NB24 Gas Log Set
16"
42"
and
The sides of the re-
place opening must be at least 16" from any combustible
wall. The ceiling must be at least 42" from the top of the
replace opening.
Figure 3 -
Sidewall and Ceiling Clearances
Figures 3 through 11
To install the gas logs into a replace with no wooden
mantel, shelf or other combustible projection above the
replace opening, measure the heat resistant material
height, TABLE A.
Heat resistant materials such as slate and marble must
IMPORTANT: If you cannot meet these minimum clear-
ances you must operate the heater with chimney ue
damper open. Refer to “Installing Vented Applications”
found on Page 17.
FP2254
measure heat resist
Heat resistant
Material
Measure
This
Distance
Heater in
Fireplace/
Firebox
FP2254
Figure 4 -
Measure Heat Resistant Material
12” or more Hood not required Hood not required
8” or less than 12” Hood not required Extend heat resistant material to 12” or install hood. Figure 4
Less than 8” Extend heat resistant Extend heat resistant material to 8” AND install hood.
material to 8” AND Figure 5. OR, extend heat resistant material to a height of
install hood. Figure 4 at least 12”
8
NB18/NB24 Gas Log Set
To install the heater with a wooden mantel, shelf or other
combustible projection above, rst measure the heat resis-
tant material shown in then refer to Table B.
FP2255
measure heat resist
Hood
Heater in Fireplace
or Firebox
8” or More
of Heat
Resistant
Material
FP2255
Figure 5 -
Measuring Heat Resistant Material for Mantel
12” or more Hood not required. Observe proles Hood not required. Observe prole (side
(side elevations) shown in Figure 6 elevations shown on Figure 8
8” or less than 12” Install hood and observe proles Install hood and observe proles shown in
shown in Figure 7 Figure 7; extend heat resistant material
extend heat resistant material to to at least 12” and observe proles shown in
at least 12” and observe proles Figure 8
Less than 8” Extend heat resistant to at least 8”, Extend heat resistant material to least 8”, install
install hood and observe proles hood and observe proles shown in
shown in Figure 7; Figure 7; extend heat resistant material to at
extend heat resistant material to at least 12” and observe proles shown in
12” and observe proles shown in Figure 8
Figure 6
9
NB18/NB24 Gas Log Set
FP2257
min clear with hood
10"
8"
6"
256O"
8" 1456O" 186" 2256O" 26"
12"
and
Figure 7 -
Minimum Mantel
Clearance with Hood
- All Models
A mantel may project from the wall a
of 2Z\x" at a of 8" above the opening, and a maxi-
mum of 6" at a of 14Z\x" above the opening.
10"
8"
6"
256O"
8" 14" 2056O" 246" 28"
FP2256
min. clearance no hood
A mantel may project from the wall a maximum
of 2Z\x" at a minimum of 14" above the opening, and a maxi-
mum of 6" at a minimum of 20Z\x" above the opening.
Figure 6 -
Minimum Mantel
Clearance with No
Hood - NB18
Heat
Resistant
Material
Heater in
Fireplace or
Firebox
FP2256
Heat
Resistant
Material
Heater in
Fireplace or
Firebox
Hood
FP2257
Figure 9 - Minimum Mantel
Clearance with Hood - NB24
(Example of Unsafe
Installation)
Figure 8 -
Minimum Mantel
Clearance with No
Hood — NB24
The bottom of the mantel may project from the
wall a maximum of 10" at a minimum of 28" above the
opening.
Figure 9 is an example of an unsafe mantel installation.
This mantel projects 4" at 8" above the opening, exceeding
the maximum acceptable depth of 2Z\x” The mantel also
projects 7" at 14Z\x" above the opening, exceeding the
maximum acceptable depth of 6".
If your mantel prole is unsafe, you may either:
• Raise the mantel to an acceptable height
• Remove the mantel
10" or less
12" min.
FP2260
min mantel 24
28"
Heat
Resistant
Material
Heater in
Fireplace or
Firebox
FP2260
256O"
8"
6"
7"
1456O"
4"
FP2259
wrong mantel clearance
Mantel
Minimum
of 8” Heat
Resistant
Material
Hood
FP2259
10
NB18/NB24 Gas Log Set
The gas log heater must be installed at least 1C\," above any combustible ooring material, such
as carpeting or tile, which is closer than 14" to the base of the replace. The minimum distance
must be maintained from the top surface of carpeting, tile, etc.
The gas log heater may be installed nearer to the oor if a minimum of 14" of noncombustible
material such as slate or marble is installed between the base of the replace and the combus-
tible ooring.
Figure 10 -
Minimum Clearance above Combustible Flooring
FP2261
Min comb floor clear
Heater in Fireplace
or Firebox
Combustible
Material
1C\,” Minimum
FP2261
Figure 11 -
Minimum Clearance above Combustible Flooring with
Noncombustible Material Installed at Base of Fireplace
FP2262
Min noncomb floor clearance
14” Minimum
Heater in Fireplace
or Firebox
Combustible
Material
This Distance
May Now be
Less Than 1C\,”
FP2262
11
NB18/NB24 Gas Log Set
• Turn the gas supply to the replace or rebox.
• Seal any fresh air vents and/or ash clean-out doors
located on the oor or wall of the replace. If left
unsealed, drafting may cause pilot outage or soot-
ing. Use a heat resistant sealant.
Manual and millivolt controlled gas logs may be installed
as a vented decorative log set in compliance with ANSI
Z21.60 and National Fuel Gas Code, Section 6.6.
• Turn off gas supply to replace or rebox.
• Have the replace oor and chimney professionally
cleaned to remove ashes, soot, creosote or other
obstructions. Have this cleaning performed annually
after installation.
• Seal any fresh air vents or ash clean-out doors
located on oor or wall of replace. If not, drafting
may cause pilot outage or sooting. Use a heat-resis-
tant sealant.
Exception:
A damper stop must be provided with the unit. Contact your
dealer to obtain one. The damper stop must be installed as
shown in to prevent full closure of the replace
damper blade and provide a minimum 29 square inch ue
opening.
Figure 12 -
Damper Stop Installation.
FP2263
Damper stop install
Damper Stop
Damper
FP2263
12
NB18/NB24 Gas Log Set
1. Center the gas log unit on the replace or rebox. Make certain the front of the burner sits
inside the front edge of the replace or rebox.
2. Anchor holes are located on the right and left sides of the unit. After centering the burner
correctly, mark the hole positions on the replace/rebox oor. Drill two (2) 5/32" diameter
holes approximately 1Z\x" deep.
3. Anchor the grate to the replace/rebox oor using the screws provided.
FP2263
secure to floor
Screw
Screw
Anchor Hole
FP2264
Figure 13 -
Securing Heater to Floor of Fireplace/Firebox
13
NB18/NB24 Gas Log Set
Figure 14
A qualied gas appliance installer must connect
the heater to the gas supply. Consult all local codes.
Hold heater valve rmly with a wrench to
prevent movement when connecting to inlet pipe.
Always use an external regulator for all propane/LPG
heaters and high pressure one to two-pound systems
only, to reduce the supply tank pressure to a maximum of
13” w.c. This is in addition to the internal regulator in the
heater valve.
FP2265
gas connection
Pipe Coupling
To Heater
Valve
Gas
Supply
Inlet
Manual Shutoff
Valve
Pipe
Stainless
Flexible Tube
Figure 14 -
Gas Connection
Locations
that the
Pressure
Tapping
Point May Be
Installed
FP2265
The heater gas inlet connection is a 3/8" NPT at the valve.
On all control type units, the inlet connection is on the right
side of unit. To connect from the opposite side, route the
pipe around the back portion of the unit.
When tightening up the joint to the valve, hold the valve
securely to prevent movement.
Test all gas joints from the gas meter to the heater valve
for leaks using a gas analyzer or soap and water solution
after completing connection.
Check the gas pressure with the appliance burning and
the control set to .
The valve regulator controls the burner pressure which
should be checked at the pressure test point.
Turn captured screw counter clockwise two or three turns
and then place tubing to pressure gauge over test point
(Use test point “OUT” closest to control knob). After taking
pressure reading, be sure and turn captured screw clock-
wise rmly to re-seal. Do not over torque. Check for gas
leaks.
FP2266
valve
Figure 15 -
Pressure Test Point Location
Millivolt Control
Test Port “OUT”
FP2266
14
NB18/NB24 Gas Log Set
FP2267
wiring diagram
The millivolt valve is a self-powered combination gas control
1. Use 18 awg, two-wire cable, 15 feet maximum length.
2. At one end of the cable, connect both wires to the wall
switch or thermostat. At the other end, connect one
wire to TP/TH and one wire to TH, or connect the wall
switch/thermostat to the two male (0.25") terminals on
the left side of the unit. The color of the wires does not
matter.
Figure 16 -
Wiring Diagram
NOTE: Log switch wires are not factory connected.
Connect log switch wires to the TH/TP and TH valve terminals as shown.
Log Switch
On/Off Switch
or Optional Wall
Switch, Remote
or T-Stat
ODS Pilot
Millivolt
Valve
TH = 3
TP = 1
TP/TH = 2
ODS
Pilot
15
NB18/NB24 Gas Log Set
1. Set remote receiver. See instructions included in
receiver kit.
2. Connect the two (2) 1/4" female connectors to the TP/TH
and TH terminals on the control valve.
The millivolt system and individual components may be
checked with a millivolt meter having a 0-1000 mV range.
Conduct each check shown in chart below by connection
meter test leads to terminals as indicated.
a. If the reading is more than 175 millivolts and the
automatic valve still does not come on, replace the
control.
b. If the closed circuit reading (“A” reading) is less than
175 millivolts, determine cause for low reading, pro-
ceed to Section B below.
1. Check gas pressure to the unit. If gas pressure is
within minimum and maximum on data plate, then
check pilot voltage, 500 millivolts minimum. If the
minimum millivolt reading is not obtainable, replace
pilot.
A Complete 2 & 3 Closed Minimum 175
System
B Thermopile 1 & 2 Open Minimum 500
Output
FP2268
remote receiver
TP/TH = 2
TP = 1
TH = 3
Figure 17 -
Installing Remote Receiver Remote Receiver
Remote Wire
Connectors
Remote Wire
Connectors
Valve
FP2268
16
NB18/NB24 Gas Log Set
— This unit is supplied with seven (7)
ceramic ber logs. Do not handle these logs with your bare
hands.
After handling the logs, wash your
hands gently with soap and water to remove any traces
of bers.
FP2270
install grate
A.
Cast Iron Grate I Slot
Key
Hole Slot
Figure 18 -
Install Cast Iron Grate
Install the cast iron grate by inserting screw head on back of right side of grate into the “I” shaped
slot on front right corner of unit. After moving screw head to the bottom of the “I” slot, insert the screw
head on the back of the left side of grate into the keyhole slot on the left front of unit.
FP2271
Grate installed
Cast Iron Grate
B
FP2271
17
NB18/NB24 Gas Log Set
FP2269
place rock wool
Dime-sized Pieces
of Rock Wool
FP2269
Figure 19 -
Place Rock Wool
1. Place the #1 log (the “chunk”) on the grate bar right side
of the burner adjacent to the controls.
2. Place front right log (#2) on right pin located on burner
and right grate bar. slide Log #1 forward so
that it is tight against log #2.
Figure 20 -
Place Ember Chunk Log #1
LG620
place log 1
Ember Chunk
Log #1
LG620
Figure 21 -
Place Right Front Log #2
LG630
NB18/24 log 2
Right Front
Log #2
LG630
3. Place right rear log (#3) on pin located
on rear support bracket and rest left side
of log on front right log.
Before installing logs, place rockwool in dime size pieces
evenly over small burner ports starting in the rear of the
burner going towards the front. Avoid placing rock wool on
slots on each side of rear burner and on large yellow ame
ports on front of burner. After covering small burner ports,
discard any excess rock wool.
Wash hands after placing rock wool. Itching may occur.
18
NB18/NB24 Gas Log Set
Figure 24 -
Place Left Front Log #5
LG633
NB18 24 Log 5
Left Front Log #5
LG633
Figure 23 -
Place Left Rear Log #4
LG632
NB18 24 Log 4
Left Rear
Log #4
LG632
4. Place left rear log (#4) on pin located on rear
support bracket on left side.
LG631
NB18 24 Log 3
Figure 22 -
Place Right Rear Log #3
Right Rear
Log #3
LG631
5. Place left front log (#5) on left pin located
on burner and left grate bar. Rest top right
portion of log on right front log.
19
NB18/NB24 Gas Log Set
LG634
NB18 24 log 6
Figure 25 -
Place Middle Left Log #6
Middle Left
Log #6
LG634
810107
NB18/24 cover
Figure 27 -
Place embers
6. Place top left log (#6) on unit by
placing grooved portion of log onto
left grate bar with bark facing out-
ward. Rest front part of log in groove
on left front log.
7. Place left top log (#7) on left rear log
(#4) and left front log (#5) using locating
grooves on bottom of #7 and locating
blocks on logs #4 and #5.
8. Place right top log (#8) onto right rear
(#3) and right front (#2) logs using locator
on bottom of right top log.
Place ickering bright embers (FBE-.1G)
after placing logs on burner. Pull apart into
small strands and place on top of existing
rock wool in front of and between front logs
where they can be seen. Try to avoid stack-
ing these embers on top of each other. Use
smaller and stringier strands for maximum
effect. Use as much as needed until desired
effect is achieved.
LG636
NB 18 24 log 8
Figure 26 -
Place Right Top Log #8
Left Top
Log #7
Right Top
Log #8
LG636
20
NB18/NB24 Gas Log Set
1. Place bottom log (#1) on two (2) pins on rear of grate
assembly and push towards rear as far as possible.
LG1065
Mon SC24R log 1
Bottom Rear Log #1
LG1065
Figure 28
LG1066
Mon SC24R logs 2 3
Ember Chunk Log #2
(Notch on both ends)
Ember Chunk
Log #3
(Notch on
one end)
LG1066
Figure 29
2. Place the ember chunk (#2)
with notch on both ends on
the grate bar right side of
the burner adjacent to the
controls. Push towards rear
as far as possible.
3. Place the ember
chunk (#3) with notch
on one end on the
grate bar left side of
the burner with notch
towards rear. Push
towards rear as far as
possible.
LG1067
Mon SC24R log 4
4. Place front bottom right log
(#4) on right pin located on
burner and right grate bar.
Front Bottom Log #4
LG1067
Figure 30
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