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THERMISTOR REPLACEMENT

    

WARNING:

  Disconnect power before attempting any 

maintenance or cleaning to reduce the risk of electric 

shock or damage to persons.  

  CAUTION: 

If unit was operating prior to servicing allow 

at least 10 minutes for lights and heating elements to cool 

off to avoid accidental burning of skin.

Tools required:

  Phillips head screwdriver  

Needle nosed pliers

  CAUTION: 

Follow “Preparation for Service” instructions 

before proceeding.
1.  Remove the decorative glass ember-bed pieces from 

the media tray.  A 

medium sized container

 such as 

a bucket or a box will be needed to keep the glass 

ember-bed pieces together.

2. 

Remove the Partially Reflective Glass by removing 

the 3 screws on each retaining bracket; (2 brackets in 

total), located on the left and right side of the Partially 

Reflective Glass. (Figure 1)

  CAUTION: 

Once the brackets have been removed 

ensure that the partially reflective glass is held securely to 

ensure that it does not fall out of the unit.
3.  Attach the provided suction cups to the glass, so that 

they can both be easily reached.  Holding both suction 

cup handles, tilt the glass forward and lift out. Carefully 

place the glass aside in a safe location.

4.  Remove the left cover panel.  The panel is secured to 

the unit with two screws on the bottom surface.

5.  Locate the thermistor, attached to the standoff secured 

to the top panel of the unit and cut the tie wrap to allow 

removal of the thermistor from the unit.

6.  Loosely wrap the provided tie wrap through the hole in 

Top Panel of Unit

Standoff

Tie Wrap

Thermistor

Figure 16

1.5 in.

(3.8 cm)

Figure 15

Left Cover 

Panel

Partially 

Reflective 

Glass

Retaining 

Brackets

Thermistor

Display / Control 

Board

Flame panel 

trough

the bottom of the standoff.

7.  On the display / control board, disconnect the existing 

thermistor, labelled “CNZ-TEMP” and connect the new 

thermistor.

8.  Run the new thermistor wire to the side of the unit 

where the old thermistor was installed, allowing the 

wire to sit in the flame panel trough.

9. 

Feed the thermistor through the tie wrap until the end is 

approximately 1.5 in. (3.8 cm) from the top of the unit.

10. Tighten the tie wrap until it is securely holding, not 

pinching, the thermistor wire.

11.  Reacquire power to the unit to ensure that the new 

thermistor is installed correctly, the ambiant temper-

ature will be displayed on the display/control board, 

then turn power off.

12. Reassemble the unit in the reverse order.

Summary of Contents for BLF7451

Page 1: ...th America Limited Dimplex North America Limited 1367 Industrial Road Cambridge ON Canada N3H 4W3 1 888 346 7539 www dimplex com REV PCN DATE 00 5 JAN 16 IMPORTANT SAFETY INFORMATION Always read this manual first before attempting to service this fireplace For your safety always comply with all warnings and safety instructions contained in this manual to prevent personal injury or prop erty damage...

Page 2: ...r death OPERATION 3 MAINTENANCE 4 EXPLODED PARTS DIAGRAM 5 REPLACEMENT PARTS LIST 5 WIRING DIAGRAM 6 PREPARATION FOR SERVICE 7 INSTRUCTIONS FOR REMOVING FROM WALL 7 Surface Mount 7 Flush Mount Complete In wall 8 SWITCHBOARD REPLACEMENT 8 RELAY BOARD REPLACEMENT 9 LED DRIVER BOARD REPLACEMENT 9 AD DC ADAPTER REPLACEMENT 10 DISPLAY CONTROL BOARD REPLACEMENT 10 FLICKER MOTOR REPLACEMENT 11 FLICKER RO...

Page 3: ...eeze or a F Freeze on the display G Brightness Changes the brightness of the lights in the unit Adjusted by repeatedly press ing the corresponding button on the remote Indicated by the second digit on the Floating Display changing to show H high and L OPERATION Figure 1 WARNING This electric firebox must be properly in stalled before it is used The unit can be controlled by either the manual contr...

Page 4: ...n this manu al an authorized service representative should perform any other servicing low H Sleep Timer The Sleep Timer can be set to automatically shut off the fireplace after a preset time from 30 minutes to 8 hours To set the timer press the timer button on the remote repeatedly until the desired time is displayed The Floating DisplayTM will display the different times as it is adjusted Once t...

Page 5: ...100RP 9 Flame LED Light Strip Amber 3 per unit 3000830200RP 10 Switch Board 3001520100RP 11 Remote Control 6700520200RP 12 Media LED Light Strip RGB 6 per unit 3001570300RP 13 Thermistor 3001560400RP For Mod 0 send instruction sheet 7214470100 with thermistor 14 Relay Board 3001630100RP 15 LED Driver Board controls 2 LED strips 3000810100RP 16 LED Driver Board controls 1 LED strip 3000810200RP 17 ...

Page 6: ...RING DIAGRAM AC DC ADAPTER RELAY BOARD SWITCH BOARD DISPLAY CONTROL BOARD THERMISTOR LED STRIPS RGB MEDIA FLAME LED STRIPS AMBER CUTOUT THERMAL FLICKER MOTOR BLOWER MOTOR LED STRIPS RGB FLAME M M ELEMENTS LED DRIVER BOARDS ...

Page 7: ...ION If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin NOTE Only required for replacement of the power cord or removal from service CAUTION Follow Preparation for Service instructions before proceeding Mounting The fireplace may be mounted in one of 2 meth ods Surface Mount Flush Mount completely in the...

Page 8: ...place Figure 7 CAUTION The unit should be supported while remov ing the screws to prevent the unit from falling 3 Remove the fireplace out of the opening by slightly lift ing and pulling forward 4 Carefully lay the unit down on a solid flat surface with the front of the unit facing up NOTE If the surface you are using as a work area is a finished surface that is prone to scratches i e hardwood flo...

Page 9: ...Transfer the wiring connections from the existing re ceiver to the new relay board NOTE Using a flat head screwdriver gently pry be tween the end of the connectors and the board to release the wires 5 Remove the relay board off the plastic mounts by pinching the plastic mounting tabs with needle nose pliers Pull the old board off 6 Line up the holes on the board and gently press the new board onto...

Page 10: ... wires that are attached to the display control board Figure 12 NOTE Using a flat head screwdriver gently pry between the end of the connectors and the board to release the wires 7 Remove the four screws that secure the AC DC adapter bracket to the controls assembly 8 Install the new AC DC adapter and install all wiring con nections 9 Reassemble in the reverse order as above CAUTION When re instal...

Page 11: ...ast 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin Tools required Phillips head screwdriver Short handled Phillips head screwdriver CAUTION Follow Preparation for Service instructions before proceeding 1 Remove the decorative acrylic ember bed pieces from the media tray which lies along the bottom of the inte rior Partially Reflective Glass A medium size...

Page 12: ...ge to persons CAUTION If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin Tools required Phillips head screwdriver Needle nosed pliers CAUTION Follow Preparation for Service instructions before proceeding 1 Remove the decorative acrylic ember bed pieces from the media tray which lies along the bottom of ...

Page 13: ...ck or damage to persons CAUTION If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin Tools required Phillips head screwdriver Needle nosed pliers CAUTION Follow Preparation for Service instructions before proceeding 1 Remove the decorative acrylic ember bed pieces from the media tray which lies along the ...

Page 14: ... the glass forward and lift out Carefully place the glass aside in a safe location 4 Remove the left cover panel The panel is secured to the unit with two screws on the bottom surface 5 Locate the thermistor attached to the standoff secured to the top panel of the unit and cut the tie wrap to allow removal of the thermistor from the unit 6 Loosely wrap the provided tie wrap through the hole in Top...

Page 15: ... remote control 6700520200RP Defective display control board assembly Replace the display control assembly 3001640100RP Flame Frozen Loose wiring Check wiring connections Defective Flicker Motor Replace Flicker Motor 2000220100RP Defective display control board assembly Replace the display control assembly 3001640100RP Flame is not visible Loose wiring Check wiring connections Flame LED light asse...

Page 16: ...er fan turns On but heater lacks heat Improper operation Refer to Operation Section Loose wiring Trace wiring in unit Defective Heating Element Replace Heating Element 2200510700RP Heating element is glowing red Normal Operation Small glowing sections of the element are considered normal Defective Heating Element If larger glowing sections are causing the heater to trip the thermal cutout unplug u...

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