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NB18/NB24 Gas Log Set
CHECK PARTS:
Verify contents to ensure you have received all parts. You
should have the following:
NB Models
•
Unvented gas log burner assembly
•
Two (2) bags of crushed volcanic rock
•
Installation/operating instructions
•
Two (2) Anchoring Screws
•
Ceramic fiber or refractory logs
•
Rock wool
•
Grate assembly
•
On/off log switch assembly (MV models only)
•
Thermostat remote control (SCR models only)
•
Double A 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. Do not
attempt to install any part of the appliance unless you
have all parts in good condition.
ITEMS NEEDED FOR INSTALLATION:
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
Gloves are recommended when handling
ceramic fiber logs to prevent skin irritation
from loose fibers. Logs are fragile; handle
with care.
Monessen • NB18/24 Gas Log Set Installation/Owner's Manual • 81D0107 • Rev B • 09/16
GAS PRESSURES
Inlet Minimum
Inlet Maximum
Regulator Pressure
Setting
Pilot Regulator
GAS SPECIFICATIONS
Model
Fuel
NB18
Natural
NB24
Natural
NB18
LP
NB24
LP
NATURAL GAS: An external regulator is required to reduce
supply pressure to a maximum of 10
systems operating at higher pressure.
PROPANE/LPG: An external regulator is required to reduce
supply pressure to a maximum of 13" w.c.
MILLIVOLT IGNITION CONTROLS
The piezo ignitor allows ignition of the pilot without the use
of matches or batteries.
Millivolt control has four (4) positions:
OFF:All gas to the gas logs is shut off at the valve.
IGN : Valve position to light/maintain a standing pilot.
ON: Valve position to turn ON/OFF log set with remote
switch/thermostat.
LOW/HI: Variable position to control flame height (heat
output).
SIGNATURE COMMAND CONTROLS
Refer to page 28.
PILOT/ODS
The gas log heater is fitted 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.
THERMAL GENERATOR
The millivolt gas log pilot is fitted with a millivolt (thermopile)
generator to provide power for remote activation.
PRODUCT FEATURES
Natural
Propane (LP)
5.0" w.c.
11.0" w.c.
10.5" w.c.
13.0" w.c.
3.5" w.c.
11.0" w.c.
3.5" w.c.
n/a
Gas Rate
Max. Input
Min. Input
BTU/h
BTU/h
28,000
19,000
37,000
25,000
27,000
22,000
36,000
28,000
⁄
" w.c. on natural gas
1
2
5
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