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MODEL 

WFF81-C

  OPTIONAL FAN KIT

INSTALLATION INSTRUCTIONS

NOTE:  

This fan kit is to be installed after installation of wall furnace and with the wall furnace front panel in

place.

STEP 1

.

This appliance, when installed, must be electrically grounded in accordance with local codes, or in
the absence of local codes, with the latest edition of the National Electric Code, ANSI/NFPA
No. 70.  In Canada, see the current Canadian Electrical Code CSA C22.1.

STEP 2

.

Set fan kit on top of the wall furnace front panel.  Using the back top edge of the fan kit cabinet
as a guide, mark a horizontal line across the wall.  Mark a small vertical line which aligns with the
slot located toward the rear of the fan kit casing.

STEP 3.

Using the four one inch screws provided, secure the wall mounting bracket to wall 1/8” below the
horizontal line.  Fan attachment bracket must be up and threaded nut sert aligned with the small
vertical line.  Note:  Anchors (not provided) may be required.

STEP 4.

Remove junction box and connect 115v power supply in accordance with the wiring diagram.
Replace junction box.

STEP 5

.

Set fan kit on top of wall furnace front panel.  Slot should align with the nut sert.  Secure fan kit
to wall mounting bracket with thumb screw provided.

Wiring
Diagram

Junction
Box

Wall Furnace
Front Panel

Fan
Kit

One Inch
Screw (4)

Wall Mounting
Bracket

Threaded Nut
Sert

Thumb
Screw

Fan Attachment
Bracket

Slot

Summary of Contents for W251F and

Page 1: ...fthisoccurs This heater may be installed without recessing into stud space by using optional FSK Free Standing Kit Thisunitisnotapprovedforinstallationinmobilehomes greenhouses orenvironmentsinvolvingdusty wet corrosive orexplosiveconditions Suchconditionswillinvalidatethewarrantyandmaycreateunsafeconditions THIS UNIT IS NOT TO BE INSTALLED IN MOBILE HOMES WARNING If the information in this manual...

Page 2: ... carton For wall thermostat models that includes the thermostat thermostat wire and insulated staples Before installing the wall furnace check the rating plate to verify that the Model Number is correct and that the wall furnace is equipped for the type gas you intend to use Model Type Type BTU Hr Vent Gas Shpg REAR REG KIT FAN KIT No Control Gas Input Size Inlet FINISHED DIMENSIONS Wt Model Weigh...

Page 3: ...dividual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of psig The appliance must be isolated from the gas supply piping system by closing its individual manual shutoffvalveduring any pressuretesting ofthegassupply piping system at test pressures equal to or less than psig The minimum inlet pressure in th...

Page 4: ...stud and joist spaces cannot be blocked with insulation or other objects Each of these openings using vertical ducts shall have a minimum free area of one square inch per 4 000 btu hr of total input rating of all gas appliances See Figure B and C If horizontal ducts are used the minimum free area shall be one square inch per 2 000 btu hr of total input rating of all gas appliances Fresh make up ai...

Page 5: ...locationofthemanualresetblocked flue switch To reset the switch insert a slender rigid object i e screwdriver through the front panel louvers and push the reset button down See Figure B 1 However you may have toremovethefrontpanel thenresettheswitchandreinstallthe front panel to relight heater If homeowner experiences this problem the vent system must be checked and corrected NOTE A pre existing v...

Page 6: ...ne of left stud either 4 above top of floor plateor4 torightofleftstudthroughfloor plate See Figure 1 located on Page 7 Page 6 FIGURE C Installation of B W Gas Vent for one story buildings or for first floor of multi story buildings Ceiling plate spacers to center B W gas vent in stud space nail securely at both ends Plate cut away for full width of stud space to provide ventilation Studs on 16 in...

Page 7: ...STEP 5 If the vent continues through additional stories within the 2x4 stud space then fire stop spacers must be installed at the second and subsequent ceiling levels See Figure D FIGURE D Installation of B W gas vent for each subsequent ceiling or floor level of multi story buildings Firestop spacers supplied by manufacturer of B W gas vent Plate cut away to provide passage of B W gas vent Nail f...

Page 8: ...nces require that the manual valve be located outside theappliance STEP 8 Makegasconnectionusingconnectorthe samesizeasgasconnectionoffurnace CHECK ALL CONNECTIONS FOR GAS LEAKS WITH LEAK DETECTOR SOLUTION DO NOT USE OPEN FLAME STEP 9 For wall thermostat units see Wiring section for thermostat connections Make sure all connections are correct and connector stems arenottouching STEP10 Tofastenfront...

Page 9: ...me stud space with vent Conceal wire inside wall or secure to wall with insulated staples that are included YOUR FURNACE MAY BE EQUIPPED WITH EITHER A WALL THERMOSTAT Figure 2 OR SNAP BULB BUILT IN THERMOSTAT Figure 1 CONTROL CHECK THE CONTROL ASSEMBLY TO DETERMINE WHICH WIRING EXAMPLE TO USE SPECIAL INSTRUCTIONS FOR REAR REGISTER KIT APPLICATION Figures 6 and 7 line drawings of rear register open...

Page 10: ... Read the information on the safety label 2 Set thermostat to it s lowest setting 3 Open cabinet door 4 Depress and turn gas control knob clockwise to OFF 5 Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the information on the safety label If you don t smell gas go to the next step 6 Locate the pilot Follow metal pilot tube fr...

Page 11: ...re control knob to LO 4 Depress and turn gas control knob clockwise to OFF 5 Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the information on the safety label If you don t smell gas go to the next step 6 Locate the pilot Follow metal pilot tube from gas control 7 Turn gas control knob counterclockwise to PILOT 8 Depress gas c...

Page 12: ...ating air passageways and venting systems of the appliance be kept clean 2 If the appliance has been equipped with the optional WFF81 C fan kit assembly the bearings of the motor should be oiled every six months with approximately 2 drops of S A E 20 oil 3 The appliance area must be kept clear and free of any combustible materials gasoline and other flammable vapors and liquids 4 It is essential t...

Page 13: ... the wall Mark a small vertical line which aligns with the slot located toward the rear of the fan kit casing STEP 3 Using the four one inch screws provided secure the wall mounting bracket to wall 1 8 below the horizontal line Fan attachment bracket must be up and threaded nut sert aligned with the small vertical line Note Anchors not provided may be required STEP 4 Remove junction box and connec...

Page 14: ...ACK BLACK MOTOR WHITE GREEN GROUND WIRE L2 White L1 Black 115 VAC 60 HZ Less than 12 Amps If any of the original wire as supplied with this appliance must be replaced it must be replaced with type thermoplastic 105 degree C wire or its equivalent WFF81 C WIRING SCHEMATIC Page 14 ...

Page 15: ...burner ports Do not enlarge ports 3 Low gas pressure 3 Check gas supply pressure 4 Pilot decreases in size when main burners 4 Supply piping is inadequately sized Consult local come on gas utility or competent installer 5 Air shutter open too far 5 Close air shutter to proper setting as outlined in these instructions slight yellow tipping is allowable on L P Gas See Page 12 6 Drafts around applian...

Page 16: ...tem system A Vent too short A The vent should terminate a minimum of 12 feet above the floor See Figure 2 Also the top of the vent must be at least 2 foot above any obstacle within a 10 foot radius including the roof See Figure A B Restriction in B All type B vents shall extend in a generally vertical direction with offsets not exceeding 45 vent system degrees except that a vent system having not ...

Page 17: ... change without notice All prices are F O B factory GRAVITY WALL FURNACE LIST PRICES JUNE 2004 3 11 2 8 9 46 1 7 12 10 47 4 1 7 A 47 9 46 3 2 11 8 4 8 2 11 9 10 7 12 1 57 59 60 55 58 56 FSK A FREESTANDING KIT BURNER ASSEMBLY SINGLE WALL FURNACE 38 39 35 29 36 42 31 30 32 34 44 19 14 18 15 16 17 21 20 13 48 49 WFF81 C FAN KIT Used on Single and Dual Wall models REAR REGISTER KIT Used on Single Wall...

Page 18: ...Burner Steel 29 84070 39 30 84070 39 30 Damper Spring 23 40377 1 90 Burner Steel WITH Frame Assembly 24 40365 11 60 Carry Over Tapping 29A N A N A 84071 51 40 Register Chain 25 40379 1 30 Burner Restrictor Plate N A N A N A 40220 2 10 Bell Pull 26 85003 1 10 for W502F and W506F Register Assembly 27 40355 18 50 Orifice Coupling 30 84631 4 50 N A N A Installation Manual N A 84504 N C Elbow 3 8 90 De...

Page 19: ...r death IF YOU SMELL GAS DON T LIGHT IT IF YOU CAN T LIGHT IT DON T FIGHT IT THIS IS NOT AN ADVERTISEMENT WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire departmen...

Page 20: ...defective to the manufacturer for inspection to enable the manufacturer to determine if the claimed defect is covered by this warranty No charges for freight labor or other expenses incurred in the repair removal or replacement of any product or component claimed to be defective will be paid by the manufacturer to the user and the manufacturer will not be liable for any expenses incurred by the us...

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