Service Manual
Model
BLF3451
UL Part Number
6909590100
IMPORTANT SAFETY INFORMATION: Always read this manual rst before attempting to service this replace. For your
safety, always comply with all warnings and safety instructions contained in this manual to prevent personal injury or property damage.
Dimplex North America Limited
1367 Industrial Road Cambridge ON Canada N3H 4W3
1-888-346-7539 www.dimplex.com
In keeping with our policy of continuous product development, we reserve the right to make changes without notice.
© 2016 Dimplex North America Limited
REV PCN DATE
00 - 6-JAN-16
7400890000R00
TABLE OF CONTENTS
Operation ...........................................................3
Maintenance .........................................................4
Exploded Parts Diagram ...............................................5
Wiring Diagram ......................................................6
Preparation for service ................................................7
Instructions for removing from wall .....................................7
Surface Mount .............................................................. 7
Recessed Mount - Partial In-wall ............................................... 8
Flush Mount – Complete In-wall ............................................... 8
Switchboard Replacement .............................................9
Relay Board Replacement ............................................10
AD/DC Adapter Replacement ..........................................10
Display / Control Board Replacement ...................................11
Flicker Motor Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Flicker Motor/ Flicker Rod Replacement .................................12
LED Light Strips Replacement .........................................12
High Temperature Cutout Replacement .................................13
Element Replacement ................................................13
Blower/fan Replacement ..............................................14
Thermistor Replacement .............................................14
Troubleshooting Guide ...............................................16
Always use a qualied technician or service agency to repair this replace.
!
NOTE: Procedures and techniques that are considered important enough to emphasize.
CAUTION: Procedures and techniques which, if not carefully followed, will result in damage to the equipment.
WARNING: Procedures and techniques which, if not carefully followed, will expose the user to the risk of re, serious
injury, or death.
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OPERATION
Figure 1
A C D E
Floating
Display
WARNING: This electric rebox must be properly installed
before it is used.
The unit can be controlled by either the manual controls which are
located on the upper right of the replace or the remote (Figure 13
& 14).
The replace is supplied with an IR multifunction remote control.
!
NOTE: To operate correctly, the remote control must be point-
ed towards the Floating DisplayTM.
A. Standby
Turns the unit On and Off.
→ Activated by pressing the Standby button on the remote or the
unit.
• The unit will turn on with the same functions that it was set to
when it was turned Off and the intake temperature will be indi-
cated on the Floating DisplayTM.
!
NOTE: When any button is pressed the intake temperature will
be displayed on the Floating DisplayTM for 5 seconds.
B. Flame Effects
Turns the ame effect On and Off.
→ Activated by pressing the button on the remote.
C. Heat ON/OFF
Turns the heater On and Off.
→ Activated by pressing the button on the unit or the remote.
• Indicated by the icon and the intake temperature being
displayed on the Floating DisplayTM, for 5 seconds before turn-
ing off.
!
NOTE: After the heater is switched off, there is a 60 second
fan delay, where the fan will continue running before turning off.
!
NOTE: The unit can be operated in Heat Only Mode. When
the unit is only running with the heater, the icon will continu-
ously be displayed on the Floating DisplayTM.
!
NOTE: The heater may emit a slight, harmless odor when rst
used. This odor is a normal condition caused by initial heating of
internal heater parts and will not occur again.
D & E. Thermostat Controls
Adjusts the temperature set point to your individual requirements.
Once the desired set temperature is reached the heater will turn
off. The heater will cycle on and off to maintain the desired set
temperature. The default temperature setting is 72°F (22°C).
F
TM
to increase the set point on the unit or the remote.
• The Floating DisplayTM will indicate the temperature set point as
it is adjusted.
!
NOTE: Holding the and the
seconds, on the unit, will change the temperature from °C to °F, or
vice versa.
buttons down for two
Disable Heat
If desired, depending on the season, the heater on the unit can be
disabled. The unit will operate in the same fashion, with remainder
of the controls.
Pressing the and buttons on the unit at the same time
and holding for 2 seconds will disable and enable the heater.
!
NOTE: When the heater has been disabled and either the
or the is pressed the Floating DisplayTM will indicate “--”.
F. Color Themes
Different presets of ambient lighting color combinations contained
in the unit.
→ Changed by repeatedly pressing the corresponding button on
the remote or the unit.
• Cycles through the different preset ambient lighting settings of
the unit, this includes different combinations of colours of the
ame base and media lighting.
!
NOTE: The last theme of the cycle is a prism where the unit
cycles through a variety of colours. Pressing the button stops
the cycling and holds the unit on the preferred color, indicated by
a “U” - Unfreeze or a “F” - Freeze on the display.
G.
Changes the brightness of the lights in the unit.
→ Adjusted by repeatedly pressing the corresponding button on
• Indicated by the second digit on the Floating Display™
Brightness
the remote.
changing to show: “H” (high), and “L” (low).
H. Sleep Timer
The Sleep Timer can be set to automatically shut off the replace
after a preset time (from 30 minutes to 8 hours).
→ To set the timer press the timer button on the remote, repeat-
edly, until the desired time is displayed.
• The Floating DisplayTM will display the different times as it is ad-
justed. Once the timer has begun, pressing the button will
display the time remaining before the unit turns Off.
!
NOTE: The Sleep Timer can be cancelled at any time by
pressing the button repeatedly until the sleep timer displays
nothing.
Resetting the Temperature Cutoff Switch
Should the heater overheat, an automatic cut out will turn the
whole unit off and it will not come back on without being reset. It
can be reset by turning the power to the unit and waiting 5 minutes before turning the unit back on.
CAUTION: If you need to continuously reset the heater, un-
plug the unit and call technical support at 1-888-346-7539.
→ Adjusted by pressing the
to decrease the set point and the
3
Remote Control Battery Replacement
To replace the battery:
1. Slide battery cover open on the remote control.
2. Correctly install one 3 Volt (CR2032 [longer life] or CR2025)
battery in the battery holder.
3. Close the battery cover.
Battery must be recycled or disposed of properly. Check
with your Local Authority or Retailer for recycling advice in
your area
Figure 2
A
B
D
F
C
E
G
H
MAINTENANCE
WARNING: Disconnect power before attempting any
maintenance or cleaning to reduce the risk of re, electric shock or damage to persons.
!
NOTE: The replace should not be operated with an ac-
cumulation of dust or dirt on or in the unit, as this can cause
a build up of heat and eventual damage. For this reason
the heater must be inspected regularly, depending upon
conditions and at least at yearly intervals.
Partially Reective Glass Cleaning
The partially reective glass is cleaned in the factory during the assembly operation. During shipment, installation,
handling, etc., the partially reective glass may collect dust
particles; these can be removed by dusting lightly with a
clean dry cloth.
To remove ngerprints or other marks, the partially reective glass can be cleaned with a damp cloth. The partially
reective glass should be completely dried with a lint free
cloth to prevent water spots. To prevent scratching, do not
use abrasive cleaners.
Fireplace Surface Cleaning
Use only a damp cloth to clean painted surfaces of the
replace. Do not use abrasive cleaners.
Servicing
Except for installation and cleaning described in this manual, an authorized service representative should perform any
other servicing.
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EXPLODED PARTS DIAGRAM
1
18
16
3
12
14
8
7
13
9
6
2
4
10
11
Replacement Parts List
1. Element. . . . . . . . . . . . . . . . . . . . . . . . .2200510300RP
2. Partially Reective Glass ...........5902700100RP
3. Blower . . . . . . . . . . . . . . . . . . . . . . . . . . 5300170300RP
4. Front Glass . . . . . . . . . . . . . . . . . . . . . .6909140100RP
5. Power Cord . . . . . . . . . . . . . . . . . . . . . . 4100190300RP
6. Flicker Motor . . . . . . . . . . . . . . . . . . . . . 2000500100RP
7. Flicker Assembly .................5902720100RP
8. Cutout . . . . . . . . . . . . . . . . . . . . . . . . . .2300201500RP
9. Flame LED Light Strip (Amber) .......3001420200RP
10. Switch Board . . . . . . . . . . . . . . . . . . . . . 3001520100RP
11. Display/ Control Board .............3001640100RP
12. Remote Control ...................6700520200RP
13. LED Light Strip (6) (RGB) (2 per unit) 3001570100RP
14. LED Light Strip (4) (RGB) (2 per unit) 3001570400RP
15. Thermistor .......................3001560300RP
16. Relay Board .....................3001630100RP
17. Mounting Kit .....................9600770100RP
18. AC/DC Adapter ...................2100250100RP
Accessories
River Rocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DFS1314
Driftwood Accessory Kit. . . . . . . . . . . . . . . . LF34DWS-KIT
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