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Monessen  • NBST27-F Log Placement Instructions  •  4615-903 Rev. A  •  08/18

Log Placement Instructions

Models:  NBST27-F

•  Gloves are recommended when handling logs to 

prevent skin irritation from loose fibers.  Logs 

are fragile - handle with care.

• 

Use only rock wool provided with log set.

• 

DO NOT ADD ADDITIONAL ROCK WOOL.

WARNING

WARNING!

The positioning of the logs is critical to the safe, clean operation of this gas log set. Sooting and other problems may 

result if the logs are not properly positioned per these instructions. Failure to position in accordance with the diagrams 

below, or failure to use only parts specifically approved for this log set may result in property damage or personal injury.

Wash hands after placing rock wool.  Itching may occur.

A.  Log Placement

Begin on Side A, valve on left as you face the fireplace.

1. Place log #1 on burner by aligning two (2) holes on 

bottom of log with two (2) pins on burner. The tallest 

part of the log is on the valve side of burner. Gently 

push log down until it comes in contact with burner sur-

face. 

Figure 5.1

LG650
NBST log 1

Log 1

Control 

Valve

Figure 1 - Place Log #1

2. Place log #2 on left grate tines by aligning the ‘V’ 

notches in the log with grate tines. The groove on the 

bottom of the log should be firmly seated on the grate 

bar. 

Figure 2

LG651
NBST log 2

Log #2

Figure 2 - Place Log #2

3.  Place log #3 on farthest right grate tine by aligning the 

‘V’ notch in log with grate tine. The groove in the bot

-

tom of the log should sit on the filler bracket surround

-

ing the pilot assembly. 

Figure 3

LG652
NBST Log 3

Log #3

Figure 3 - Place Log #3

Summary of Contents for NBST27-F

Page 1: ...jury Wash hands after placing rock wool Itching may occur A Log Placement Begin on Side A valve on left as you face the fireplace 1 Place log 1 on burner by aligning two 2 holes on bottom of log with two 2 pins on burner The tallest part of the log is on the valve side of burner Gently push log down until it comes in contact with burner sur face Figure 5 1 LG650 NBST log 1 Log 1 Control Valve Figu...

Page 2: ...he bottom of the log onto the rectangular protrusion on the end of log 1 Figure 6 7 Place log 7 on left two 2 grate tines by aligning the V notch in log with grate tines Make sure groove on bottom of log is firmly seated on grate bar Figure 7 LG655 NBST log 6 Log 6 Log 1 Control Valve Figure 6 Place Log 6 8 Place log 8 by aligning V notch in bottom of log with the horizontal grate bar between tine...

Page 3: ...uld just touch the top of the thermocouple tip for natural Refer to Figure 11 for correct pilot flame If the pilot flame does not touch the thermocouple then the main burner cannot function reliably Figure 12 for incorrect shape of pilot flame FP2272 pilot correct flame Figure 10 Correct Appearance of Pilot Flame Thermocouple for Natural Thermocouple for LP Figure 11 Incorrect Appearance of Pilot ...

Page 4: ...normal operation at full rate after 15 minutes the following flame appearances should be observed Burner will have a random pattern of yellow flames as shown in Figure 12 There should be glowing embers on the front burner NOTE The front flames and embers will be an opaque orange color during the burn off time CAUTION After a 15 minute pre heat period observe all yellow flames to ensure there is no...

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