Lennox Hearth Products FBK-250 User manual

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 1
GENERAL INFORMATION
BLOWER KIT FBK-250
This blower kit may be used with gas fireplaces. The FBK-250 blower kit
isusedwhenunit-mountedvariablespeedblowercontrolisdesired.The
blower is installed beneath the firebox. Room air is drawn in through the
bottom area of the fireplace, heated as it passes across the firebox, and
discharged through the upper panel/louver area at the top of the
fireplace. This kit contains one blower, one speed control module, two
speed control module securing screws and these instructions.
HEARTH PRODUCTS
KITS AND ACCESSORIES
INSTALLATION INSTRUCTIONS FOR BLOWER KIT FBK-250 (CATALOG NO. 80L86)
FOR USE WITH GAS FIREPLACES
Step 1. Turnoff the fireplaceand allow itto cool beforeproceeding.
Step 2. If the appliance is connected to 120 volt power, disconnect
the power.
Step 3. Shut off the gas supply to the fireplace.
Step 4. Open the lower compartment door (either a radiant panel or
louver assembly) by pushing in simultaneously the left and right side of
the door. (The door is hinged at the bottom.)
Step 5. D-400, D-500, D-600 and D-800 series; B-500, B-600, and
B-800 series; and MDT3328 and MDR3328 Fireplaces - Remove the
bottom panel or louver assembly by removing the screw at each end of
the panel or louver assembly, retain the end spacers, and then pull the
panel or the louver assembly from the unit.
Elite-2 Series Fireplaces - Remove the bottom compartment door (on
Multi-Open fireplaces, the modesty-panel-side door) by sliding the
hinge pin, located at the door’s left side, to the right until it disengages
from the left corner post hole. Pull the door diagonally to the left, away
from the fireplace.
Step 6. Elite-2 Series Fireplaces - Remove the modesty panel as
follows: lift the modesty panel by the tab on the panel’s right end, pull
the right end of the panel away from cabinet and then pull the panel
diagonallyoutofthecornerpost slots on the left sideoftheunit.Remove
the modesty panel carefully, so that none of the wires become loose or
disconnected.
Step 7. Front-open direct vent and B-vent units -
Slide the blower assembly through the front opening to the middle rear
area of the cabinet base. Position the blower assembly so that the tabs
(located on the cabinet base) are seated in the notches of the blower
bracket. Then bend the tabs over to secure the blower assembly. See
Figure 1, direct vent models; Figure 3, B-vent models .
INSTALLATION INSTRUCTIONS
750,029M REV. F 05/2005
Figure 3
Figure 2
Figure 1
BLOWER MOUNTING TABS
BLOWER JUNCTION
BOX
ELECTRICAL
OUTLET
BLOWER KIT INSTALLATION - ELITE FRONT-OPEN DIRECT VENT FIREPLACE
TOP VIEW
VIEW A
FIGURE 8
MODESTY PANEL
CONTROL MODULE
USE MODULE
HOLES 1 AND 2
(SEE FIGURE 8)
BLOWER
MOUNTING
TABS
BLOWER
JUNCTION BOX
ELECTRICAL
OUTLET
BLOWER KIT INSTALLATION FOR MULTI-OPEN DIRECT VENT FIREPLACE
(See-through, Peninsula, Corner left)
MODESTY
PANEL
CONTROL
MODULE
VIEW A
FIGURE 8
USE MODULE
HOLES 1 AND 2
(SEE FIGURE 8)
BLOWER MOUNTED
HERE ON MPD35ST
MODEL
BLOWER MOUNTING TABS
BLOWER JUNCTION
BOX
ELECTRICAL
OUTLET
BLOWER KIT INSTALLATION FOR B-VENT FRONT-OPEN FIREPLACE
TOP VIEW
CONTROL MODULE
VIEW A
FIGURE 9
CONTROL MODULE MOUNTING TABS
CAUTION:
ROUTE BLOWER ELECTRICAL CORDS, SO THAT THEY ARE POSITIONED
WELL AWAY FROM THE ROTATING BLOWER PARTS

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
2
IMPORTANT: Ground lead must be connected tothe green screw
located on the junction box . Failure to do so will prevent the
appliance from operating. The appliance must be electrically
grounded in accordance with local codes or, in the absence of local
codes,the NationalElectrical Code, ANSI/NFPA70-(latest edition).
(In Canada, the current CSA C22-1 Canadian Electrical Code.)
Step 9. Multi-open direct vent units -
Install a junction box cover (field-provided) over the junction box.
Multi-open direct vent - Open all remaining bottom hinged-panels.
Slide the blower assembly through the closest opening to the flue
side of the cabinet base. Position the blower assembly so that the
tabs (located on the cabinet base) are seated in the notches of the
blower bracket. Bend the tabs over to secure the blower assembly.
See Figure 2 for see-through, peninsula or corner-left models;
Figure 4 for corner right models .
Step 8. If electrical power has not been provided to the unit’s
junction box receptacle - Route a 3-wire, 120Vac power line to the
unit’s junction box. Remove the receptacle by removing the two
securing screws. Connect the supply wires to the receptacle as
shown in Figure 10. Reinstall the receptacle.
Figure 7
Figure 6
Figure 5
Figure 4
BLOWER
JUNCTION
BOX
ELECTRICAL
OUTLET
BLOWER KIT INSTALLATION FOR MULTI-OPEN DIRECT VENT FIREPLACE
(Corner Right)
BLOWER MOUNTING TABS
MODESTY
PANEL
CONTROL
MODULE
VIEW A
FIGURE 8 USE MODULE
HOLES 1 AND 2
(SEE FIGURE 8)
12” MINIMUM FIELD PROVIDED
EXTENSION CORD
BLOWER MOUNTING TABS
BLOWER JUNCTION
BOX
ELECTRICAL
OUTLET
CONTROL MODULE
BLOWER KIT INSTALLATION
D-400, MDT3328 AND MDR3328 MODELS FRONT-OPEN DIRECT VENT FIREPLACE
TOP VIEW
(Millivolt Connection shown)
Use Module Holes 1 and 2
For Electronic Units (See Figure 8)
(Some units may need
these holes field-provided)
Use Module Holes 1 and 3
For Millivot Units
(See Figure 8)
Holes Shown are Cabinet
Flange Holes
VIEW A
FIGURE 8
BLOWER MOUNTING TABS
BLOWER JUNCTION
BOX
ELECTRICAL
OUTLET
CONTROL MODULE
BLOWER KIT INSTALLATION
D-500 MODEL FRONT-OPEN DIRECT VENT FIREPLACE
TOP VIEW
(Millivolt Connection shown)
Use Module Holes 1 and 3
For Millivot Units
(See Figure 8)
Use Module Hole 3
For Electronic Units
(See Figure 8)
VIEW A
FIGURE 8
Holes Shown are
Cabinet Flange Holes
BLOWER MOUNTING TABS
BLOWER JUNCTION
BOX
ELECTRICAL
OUTLET
VIEW A
FIGURE 8
CONTROL MODULE
BLOWER KIT INSTALLATION For D-600 and D-800 MODELS
FRONT-OPEN DIRECT VENT FIREPLACE
TOP VIEW
(Millivolt Connection shown)
Use Module Holes 1 and 3 For Millivolt and Electronic Units
(See Figure 8)
Holes Shown are Cabinet Flange Holes

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 3
Direct Vent Units - The approximate blower start time is 15 minutes
from main burner startup. The approximate blower shut off time is 10
after main burner shut down.
B-Vent Units - The approximate blower start time is 20 minutes from
main burner startup. The approximate blower shut off time is 20 after
main burner shut down.
Step 10. Direct vent units - Place the front lip of the control module
underneath the front flange of the cabinet bottom panel as shown in
ViewA, Figure8 .The locationof the twoor one screw(s)used to mount
thecontrolmodule(anumberedmodulemounting holepatternisshown
in Figure8) varies betweentheElite-2;D-400,MDT3328and MDR3328;
D-500, D600, and D-800 series appliances:
a - see Figure 1 for Elite-2 Front -open units;
b- see Figure 2 for EDST-2, EDPF-2, and EDCL-2 multi-open units;
c - see Figure 4 for EDCR-2 Multi-open units;
d - see Figure 5 for
D-400, MDT3328 AND MDR3328 units;
e-
see Figure 6 for D-500 series units;
f - see Figure 7 for D-600 and 800 series units;
Secure the module with the two (or one) kit-provided screw(s).
Figure 8
B-vent units - There are two module mounting tabs located on the
cabinet base just to the left/front of the blower, as shown in Figure 3 .
Bend these tabs up, 90 degrees. Place the control module behind the
verticaltabs as shownin Figure3 andsecure the moduletothe tabs with
the two screws provided in this kit.
Step 11. Adjust the height of the thermal element sensing disk
located on top of the module so that it touches the underside of the
firebox floor in Direct Vent units, B-600/800 units and the firebox
sub-floor in B-500 units. To accomplish this, loosen the wing nut on
the module’s side, raise the sensing disk housing to the height
required above, then retighten the wingnut. See Figure 8, View A for
direct vent units, see Figure 9, View A for B-500 units and Figure 9,
View B for B-600/800 units.
Step 12. Plugtheblowercordintothe module and the module cord into
the top receptacle as shown in Figure 10 .
Step 13. Elite-2 Series Gas Fireplaces - Remove the control knob from
the module. See View A, Figure 8 . Cut out the circular opening on the
modesty panel sticker that is reserved for the installation of the speed
control module. Reinstall the modesty panel carefully, so that none of
the wires become loose or disconnected. Reinstall the control knob.
DIRECT VENT MODELS
Blower
Control Module
Modesty Panel
Control Knob
Module
Securing Screws
VIEW A - MOUNTING CONTROL MODULE TO CABINET
Firebox Bottom Floor
Cabinet Bottom Panel
Wing Nut
Adjust Thermal Element Sensing Disk
to Touch Bottom of FireBox Floor
40
mm 48
mm
MOUNTING
HOLE PATTERN
ON MODULE
1
2
3
Figure 9
B-VENT MODELS
Step 14. Elite-2 Series Gas Fireplaces - Reinstall the modesty
panel. Reinstall the modesty panel carefully, so that none of the
wires become loose or disconnected.
Step 15. Reinstall the bottom panel or louver assembly.
Step 16. Restore the electrical power to the unit.
Step 17. Start the fireplace by following the procedure indicated in the
lighting instructions section of the Homeowner’s Care and Operation
Instructions manual, supplied with the fireplace.
Step 18. Check the start up and shutdown, and the running operation
of the blower. Also check the variable speed feature of the speed control.
Blower Control Module
Control Knob
Module Securing Screw
VIEW B - MOUNTING CONTROL MODULE TO CABINET
Firebox Bottom Floor
Cabinet Bottom Panel
Wing Nut
Adjust Thermal Element Sensing Disk
to Touch Bottom of FireBox Floor
Module Cabinet Base Tab
Blower Control Module
Control Knob
Module Securing Screw
Firebox Bottom Floor
Cabinet Bottom Panel
Wing Nut
Adjust Thermal Element Sensing Disk To Touch
Bracket On Bottom Of FireBox Sub-Floor
Module Cabinet Base Tab
Firebox Sub-Floor
VIEW A - MOUNTING CONTROL MODULE TO CABINET

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
4
2
Lennox Hearth Products reserves the right to make changes at any time, without notice, in design,
materials, specifications, prices and also to discontinue colors, styles and products.
Consult your local distributor for fireplace code information.
1110 West Taft Avenue • Orange, CA 92865
Printed in U.S.A. © 2001 by Lennox Hearth Products
P/N 750,029M REV. F 05/2005
Figure 10
120 VAC BLACK
NEUTRAL WHITE
GROUND GREEN
SPEED CONTROL MODULE
Plug Blower into Module and
Module into Top Receptacle.
Tab intact
NEUTRAL SIDE
OF RECEPTACLE
If any of the original wire as supplied must be replaced, it must be
replaced with type AWM 105 degree C - 14 gauge wire.
Green ground screw
RECEPTACLE Red
Black
JUNCTION BOX
HOT SIDE
OF RECEPTACLE
Field Wired
Factory Wired
BLOWER
120V, 60HZ, 1PH BLOWER CONTROL CIRCUIT WIRING
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.