Monessen Hearth Natural Blaze Series Operating instructions
1
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/2020
Models:
Installation/Owner’s Manual
Appliance Setup, Care and Operation
NOTICE: DO NOT discard this manual!
In the Commonwealth of Massachusetts installation must be
See appliance installation manual for additional
INSTALLER: Leave this manual with party responsible for use and operation.
OWNER: Retain this manual for future reference.
Contact your dealer with questions regarding installation, operation or service.
• DO NOT-
mable vapors and liquids in the vicinity of this
• What to do if you smell gas
- DO NOT
- DO NOTDO
NOT
- Immediately call your gas supplier from
-
- If you cannot reach your gas supplier, call
• Installation and service must be performed
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.
NB18NV/PV
NB24NV/PV
NB18NIF/PIF
NB24NIF/PIF
Natural Blaze Series
• DO NOT install this unit in a bedroom or
810107
NB18/24 cover
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/20202
Safety Alert Key:
• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.
• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.
• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
• NOTICE: Used to address practices not related to personal injury.
Table of Contents
Installation Standard Work Checklist3
4
4
4
4
4
2 Getting Started
5
5
5
6
6
7
9
13
13
14
4 Gas Information
15
15
15
16
16
5 Electrical Information
17
18
19
19
20
21
6 Gas Log Set
22
23
25
26
28
29
29
7 Owner’s Manual
31
32
34
34
35
37
37
37
10 Lighting Instructions
38
41
43
11 IntelliFire Plus
44
48
48
48
49
13 Troubleshooting
50
51
53
71
73
NOTE
3
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/2020
Installation Standard Work Checklist
WARNING! Risk of Fire or Explosion! Failure to install appliance according to these instructions could
lead to a fire or explosion.
Follow this Standard Work Checklist
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/20204
those consisting entirely of steel, iron, brick, tile, concrete,
Materials that are reported as passing ASTM E 136,
Standard Test Method for Behavior of Materials in
a Vertical Tube Furnace at 750 ºC shall be considered
non-combustible materials.
NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE.
-
be factored as primary heat in residential heating calcula-
NOTICE: This installation must conform with local codes.
In the absence of local codes you must comply with the
National Fuel Gas Code, ANSI Z223.1-latest edition in
the U.S.A.
1
D. High Altitude Installations
NOTICE: If the heating value of the gas has been reduced,
these rules do not apply. Check with your local gas utility
or authorities having jurisdiction.
Check with your local gas utility to determine proper
MODEL: NB18NV/PV, NB24NV/PV, NB18NIF/PIF
NB24NIF/PIF
LABORATORY: CSA
TYPE: Unvented Room Heater
STANDARD: ANSI Z21.11.2-2016 (Unvented Heaters)
Gas Appliances for Installation in Solid-Fuel
Burning Fireplaces)
Models
Maximum
Input
BTU/h
Minimum
Input
BTU/h
(0-2000 FT) 28,000 19,000 #38
(0-2000 FT) 27,000 22,000 #52
(0-2000 FT) 37,000 25,000
(0-2000 FT) 36,000 28,000 #49
(0-2000 FT) 28,000 19,000 #38
(0-2000 FT) 27,000 22,000 #52
(0-2000 FT) 37,000 25,000
(0-2000 FT) 36,000 28,000 #49
NOTE:
NATURAL PROPANE (LP)
Inlet Minimum
—
NATURAL GAS:
12
systems operating at higher
PROPANE/LPG:
Pilot/ODS
available in the room and shuts the gas log heater off if the
C. Gas Pressures
5
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/2020
2 Getting Started
A. Design and Installation Considerations
jurisdiction over restrictions, installation inspection and
Before
•
•
• Whether optional accessories—devices such as a wall
•
Improper installation, adjustment, alteration, service or
Installation and service of this appliance should
C. Inspect Appliance and Components
• Carefully remove the appliance and components from
• Read all of the instructions before starting the instal-
B. Tools and Supplies Needed
Before beginning the installation be sure that the following
•
•
•
• Manometer
•
• Safety glasses
•
• Soapy water solution for gas leak testing
•
•
•
•
WARNING! Risk of Fire, Explosion or Electric Shock!
DO NOT use this appliance if any part has been under
appliance and to replace any part of the control system
and/or gas control which has been under water.
• Manual shutoff valve
• Sediment trap
•
•
lation. Follow these instructions carefully during the
WARNING! Risk of Fire or Explosion! Damaged parts
could impair safe operation. DO NOT install damaged, in-
complete or substitute components. Keep appliance dry.
Gloves are recommended when handling
refractory and logs to prevent skin irritation
with care.
CAUTION
WARNING: This product and the
fuels used to operate this product (liquid
propane or natural gas), and the products
of combustion of such fuels, can expose
you to chemicals including benzene, which
is known to the State of California to cause
cancer and reproductive harm. For more
information go to: www.P65Warnings.
ca.gov.
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/20206
E. Installation Information
Use manufacturer's installation and clearance require-
-
A
C
D
B
Firebox
This appliance is for installation only in a solid-fuel
Exception: DO NOT install this appliance in a factory-
it has not been tested or should not be used with
unvented gas logs.
WARNING
D. Check Parts
NB Models
•
•
•
•
•
•
•
•
•
•
-
not packaged with the
•
• Wall switch with 15' wire
•
parts are missing or damaged, immediately inform the
Do not
attempt to install any part of the appliance unless you
have all parts in good condition.
Placement in Fireplace with a Restrictive Barrier
Height of Restriction
(x)
Minimum Depth of
Fireplace/Firebox
*
*Any barrier greater than 3" placed in front of the gas log set is not
recommended by the manufacturer.
NOTE:
If the unit is raised, the minimum height dimension listed
NOTE: If the log set is equipped with a remote receiver, a
restrictive barrier may reduce the battery life by increasing
Model A B C D
2214
2514
2812 2014
2514
2514
7
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/2020
Do not install the heater:
• Where curtains, furniture, clothing, or
36" from the front of the heater.
•
• In windy or drafty areas.
WARNING
WARNING
Gloves are recommended when handling
logs to prevent skin irritation from loose
Barriers such as the bottom of a glass door frame
placed in front of a gas log set can change the air
can cause the unit to overheat and malfunction when
installed as a vented log set.
WARNING
should have the louvers fully open while
the unit is in operation
-
or as near as possible to the rear
Figure 2.2 - Reference Drawing of a Natural Flame Log Set in
an Enclosure with Glass Door or Barrier Installed
F. Adequate Combustion Ventilation Air
unusually tight construction unless provisions are provided
3
of the aggregate input rating of all appliances installed in
3
-
ing directly with the space in which the appliances are
installed, through openings not furnished with doors, are
a
have a continuous water vapor retarder with a rating of
112
gasketed or sealed, and
b eather stripping has been added to windows and
doors, and
c aulking or sealants are applied to areas such as joints
around window and door frames, between sole plates
panels, at penetrations for plumbing, electrical and gas
-
1 + L2
50
Consider two connecting rooms with an open area
L1122
12
50
If there were a door between the two rooms the calculation
12
50
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/20208
If the area in which the heater may be
operated does not meet the required volume
for indoor combustion air, combustion and
ventilation air shall be provided by one
of the methods described in the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, the
International Fuel Gas Code or applicable
local codes.
WARNING
W
H
Counter
Figure 2.3
9
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/2020
3 Clearances and Height Requirements
Sidewall and ceiling clearances: sides -
place opening must be at least 16" from any combustible
ceiling must be at least 42" from the top of the
Heat resistant material (minimum requirements) with
no wooden mantel or other combustible projection:
mantel, shelf or other combustible projection above the
height, according to Figure 3.2 and TABLE A
be
at least 1/2" thick. Sheet metal should not be installed
onto combustible material.
IMPORTANT: If you cannot meet these minimum clear-
“
FP2254
measure heat resist
Material
Measure
Distance
Figure 3.2 - Measure Heat Resistant Material
Heat Resistant Material
Measurement
Requirements for Safe Installation
NB18 NB24
Figure 3.3
Figure 3.5
OR
16"
42"
Figure 3.1 - Sidewall and Ceiling Clearances
The dimensions shown in Figures 3.1 through
3.8 and defined in the fireplace manufacturer's
instructions are minimum clearances to maintain
when installing this heater. Left and right clearances
are determined when facing the front of the heater.
Follow these instructions carefully to ensure safe
installation. Failure to follow instructions exactly
WARNING
A. Clearances and Height Requirements
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/202010
Heat resistant material (minimum requirements) with
wooden mantel or other combustible projection:
-
tant material shown in Figure 3.3,
FP2255
measure heat resist
Material
Figure 3.3 - Measuring Heat Resistant Material for Mantel
Table B - Heat Resistant Material Requirements Height and Mantel Location
Heat Resistant
Material
Measurement
Requirements for Safe Installation with Wooden Mantel, Shelf or other Combustible
Projection
NB18 NB24
Figure 3.6
in Figure 3.5 OR
in Figure 3.5 OR
shown in Figure 3.6
Figure
3.5 OR
Figure 3.6
in Figure 3.5 OR
shown in Figure 3.6
11
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/2020
Models
Example: A mantel may project from the wall a maximum
of 212 minimum
minimum of 1412
10"
8"
6"
2"
8" 14" 20" 24" 28"
FP2256
min. clearance no hood
Example:
of 212
12
NB18
Material
FP2257
min clear with hood
10"
8"
6"
2"
8" 14" 18" 22" 26"
12"
Material
NB18/24
Example:
10" or less
12" min.
FP2260
min mantel 24
28"
Material
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/202012
38
Figure 3.7
OR
Figure 3.8
Figure 3.7 - Minimum Clearance above Combustible
Flooring
FP2261
Min comb floor clear
Combustible
Material
138
Figure 3.8 - Minimum Clearance above Combustible
Flooring with Noncombustible Material Installed at Base
of Fireplace
FP2262
Min noncomb floor clearance
14” Minimum
Combustible
Material
38
13
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/2020
Before Fully Installing the Unit:
• OFF
•
unsealed, drafting may cause pilot outage or soot-
Do not seal the
may be installed as a vented decorative log set in com-
Since, the gas logs are operated with the
damper open, non-combustible material and minimum
mantel requirements do not apply.
B. Before installing the appliance:
•
•
cleaned to remove ashes, soot, creosote or other
• Seal any fresh air vents or ash clean-out doors
Install and operate the appliance as directed in this
manual.
C. Damper stop installation:
shown in Figure 3.9
Figure 3.9 - Damper Stop Installation.
FP2263
Damper stop install
Damper Stop
Damper
chimney cleaner.
WARNING
This log set can be installed in a solid fuel burning
fireplace (masonry fireplace or manufactured
Exception: DO NOT install this appliance in a factory-
it has not been tested or should not be used with
unvented gas logs. This log set may be installed as
a vented log set.
WARNING
The use of thermostat is not allowed on vented log
application. It is only allowed on unvented room
WARNING
When this log set is installed in a vented application,
the damper must be clamped to be fully open.
WARNING
NOTE
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/202014
Figure 3.10 - Securing Heater to Floor of Fireplace/Firebox
D. Assembly Procedure
the burner assembly correctly, mark the holes on the
Proper installation of the grate is essential to prevent
any movement of the gas logs and controls during
operation.
adjust the controls. Movement of unit may cause
shifting of the gas logs which leads to sooting and
improper burning. Grate movement could cause a
gas leak.
Special care is required if you are installing the unit
Raise the fireplace floor using noncombustible
materials, as described in Placement in a Fireplace
with Restrictive Barrier on Page 6.
WARNING
Screw
Screw
15
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/2020
4 Gas Information
A. Gas Line Connection
NOTICE:
IMPORTANT:
heaters and high pressure one to two-pound systems
When tightening up the joint to the valve, hold the valve
DO NOT USE AN OPEN FLAME.
Check the gas pressure with the appliance burning and
the control set to HIGH
Use new black iron or steel pipe. Internally tinned
copper or copper tubing can be used per National
Fuel Code, section 2.6.3, providing gas meets
codes. Gas piping system must be sized to provide
minimum inlet pressure (Listed on Data Plate) at the
will occur if the pipe is too small.
A manual shutoff valve must be installed upstream
of the appliance. Union tee and plugged 1/8" NPT
pressure tapping point should be installed upstream
of the appliance.
WARNING
Connecting directly to an unregulated propane/
LPG tank can cause an explosion.
WARNING
CHECK GAS TYPE: The gas supply must be the
same as stated on the heater’s rating plate. If the
gas supply is different, DO NOT INSTALL THE
HEATER. Contact your dealer for the correct model.
WARNING
Figure 4.1 Gas Connection
B. Fuel Type
Field conversion is not permitted.
• Make sure the appliance is compatible with available gas
C. Gas Pressure
NATURAL PROPANE (LP)
Inlet Minimum
—
WARNING! Risk of Fire or Explosion! High pressure
will damage valve. Low pressure could cause explosion.
• Install regulator upstream of valve if line pressure is
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/202016
Note:
of Massachusetts installation must be performed by a
pressure testing gas line at test pressures
pressure testing gas line at test pressures
WARNING
Depending upon local code, a manual gas shutoff, in
a readily accessible area may be required and located
D. Gas Service Access
FP2266
valve
Figure 4.2 - Pressure Test Point Location Millivolt Control
Check the gas pressure with the appliance burning and
the control set to HIGH
-
sure reading, be sure and turn captured screw clockwise
Figure 4.3 Pressure Test Point Location
Test Port ‘A’
E. Check Gas Pressure
Millivolt
and then place tubing to pressure gauge over test point
pressure reading, be sure and turn captured screw clock-
17
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/2020
5 Electrical Information
CAUTION
Label all wires before disconnecting when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Do not connect wall switch to 110 V circuit.
WARNING
Electrical connections should only be performed
must be off when connecting to main electrical
power supply or performing service. All wiring
shall be in compliance with all local, city and
state codes. The appliance, when installed,
must be electrically grounded in accordance
with local codes or in the absence of local
codes, with the National Electrical Code ANSI/
NFPA 70 (latest edition) and Canadian Electrical
Code, CSA C22.1.
WARNING
A. General Information
WARNING! Risk of Shock or Explosion! DO NOT wire
110-120 VAC to the valve or to the appliance wall switch.
Incorrect wiring will damage controls.
NOTICE: This appliance must be electrically wired and
grounded in accordance with local codes or, in the absence
of local codes, with National Electric Code ANSI/NFPA
70-latest edition.
with ground-fault circuit-interrupter protection, in
compliance with the applicable electrical codes, when
it is installed in locations such as in bathrooms or near
Electrical Service and Repair
WARNING! Risk of Shock! Label all wires prior to dis-
connection when servicing controls. Wiring errors can
cause improper and dangerous operation. Verify proper
operation after servicing.
WARNING! Risk of Shock! Replace damaged wire with
type 105º C rated wire. Wire must have high temperature
insulation.
Accessories Requirements
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/202018
-
trol THAT DOES NOT REQUIRE 110 VAC TO OPERATE.
B. Connect Optional Wall Switch or
Thermostat (vent free application only)
Figure 5.1 - Wiring Diagram
NOTE: Log switch wires are not factory connected. Connect log switch wires to the TP/TH and TH valve
terminals as shown.
FP2267
wiring diagram
Log Switch
Millivolt
CAUTION
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing.
Wires
19
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/2020
C. Connect Remote Receiver
valve, connect the piggy back terminal of the receiver
of the log switch onto the piggy back terminal on the
receiver
NOTE: Do not allow wires to touch grate or burner.
NOTE: Heat reduces battery life. You can protect the
receiver and extend battery life by mounting receiver
D. Check System Operation
Conduct each check shown in chart below by connecting
1. Complete Millivolt System Check
(“A” Reading - Thermostat contacts CLOSED -
Control Knob “ON” - Main burner should turn
ON)
automatic valve still does not come on, replace the
175 millivolts, determine cause for low reading, pro-
2. Thermopile Output Reading Check
(“B” Reading - Thermostat contacts OPEN - Main
burner OFF)
minimum millivolt reading is not obtainable, replace
Figure 5.2 - Installing Remote Receiver
Check
Test To Test
Connect Meter Leads
to Terminals
Switch or Thermostat
Contacts Meter Should Read
A Complete System 2 and 3 Closed Minimum 175
B 1 and 2 Minimum 500
TP/TH = 2
TP = 1
TH = 3
Connectors
Connectors
Monessen • Natural Blaze Owner’s /Installation Manual • 4619-900 Rev. C • 1/202020
E. Wiring Requirements
™ Plus ODS Ignition System Wiring
WARNING! Risk of Shock or Explosion! DO NOT wire
IFP ODS controlled appliance junction box to a switched
circuit. Incorrect wiring will override IFP ODS safety lock-
out.
THERMOCOUPLE MODULE
PILOT
19093-Thermocouple Module Wire
CONTROL MODULE
I
S
BATTERY PACK
6V DC
RED
BLACK
BROWN
BROWN/RED
OPTIONAL ON/OFF
SWITCH
RC300 4.5V DC
(AAA X 3)
FLAME
MODULATION
BLACK
(GROUND)
ORANGE
(PILOT)
GREEN
(MAIN)
THERMOCOUPLE
ORANGE
IGNITOR
GRAY
19026-GM931 Control Box ODS
THERMOCOUPLE
IGNITOR
WHITE
RED
Figure 5.4 IntelliFire™ Plus ODS Wiring Diagram (Battery Only)
Figure 5.3 Battery Pack Location
Battery Pack
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