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Specifications are subject to change without notice.

19

441 01 7201 00

ELECTRICAL CONNECTION TO J- BOX
Electrical Box on Furnace Casing Side

FIRE OR ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury, death, or property damage.
If field- supplied manual disconnect switch is to be mounted

on furnace casing side, select a location where a drill or

fastener cannot damage electrical or gas components.

!

WARNING

1. Select and remove a hole knockout in the casing where the

electrical box is to be installed.

NOTE

: Check that duct on side of furnace will not interfere with

installed electrical box.

2. Remove the desired electrical box hole knockout and posi-

tion the hole in the electrical box over the hole in the fur-

nace casing.

3. Fasten the electrical box to casing by driving two field

supplied screws from inside electrical box into casing

steel.

4. Remove and save two screws holding J- Box.

5. Pull furnace power wires out of 1/2- in. (12 mm) diameter

hole in J- Box. Do not loosen wires from strain- relief

wire- tie on outside of J- Box.

6. Route furnace power wires through holes in casing and

electrical box and into electrical box (see Fig. 22)

7. Pull field power wires into electrical box.
8. Remove cover from furnace J- Box.

9. Route field ground wire through holes in electrical box

and casing, and into furnace J- Box.

10. Reattach furnace J- Box to furnace casing with screws re-

moved in Step 4.

11. Secure field ground wire to J- Box green ground screw.

12. Complete electrical box wiring and installation. Connect

line voltage leads as shown in Fig. 24. Use best practices
(NEC in U.S. for wire bushings, strain relief, etc.)

13. Reinstall cover to J- Box. Do not pinch wires between

cover and bracket.

POWER CORD INSTALLATION IN FURNACE J- BOX
NOTE

: Power cords must be able to handle the electrical

requirements listed in Table 7. Refer to power cord
manufacturer’s listings.

1. Remove cover from J- Box.
2. Route listed power cord through 7/8- in. (22 mm) diameter

hole in J- Box.

3. Secure power cord to J- Box bracket with a strain relief

bushing or a connector approved for the type of cord used.

4. Secure field ground wire to green ground screw on J- Box

bracket.

5. Connect line voltage leads as shown in Fig. 24.
6. Reinstall cover to J- Box. Do not pinch wires between

cover and bracket.

BX CABLE INSTALLATION IN FURNACE J- BOX

1. Remove cover from J- Box.
2. Route BX cable into 7/8- inch diameter hole in J- Box.
3. Secure BX cable to J- Box bracket with connectors ap-

proved for the type of cable used.

4. Secure field ground wire to green ground screw on J- Box

bracket.

5. Connect line voltage leads as shown in Fig. 24.
6. Reinstall cover to J- Box. Do not pinch wires between

cover and bracket.

A10141

Fig. 22 - Field- Supplied Electrical Box on Furnace Casing

24- V WIRING

Make field 24- v connections at the 24- v terminal strip. (See Fig. 24)

Connect terminal Y as shown in Fig. 38 for proper cooling
operation. Use only AWG No. 18, color- coded, copper thermostat

wire.
The 24- v circuit contains an automotive- type, 3- amp. fuse located
on the control. Any direct shorts during installation, service, or

maintenance could cause this fuse to blow. If fuse replacement is
required, use ONLY a 3- amp. fuse of identical size.

ACCESSORIES

1. Electronic Air Cleaner (EAC)

Connect an accessory Electronic Air Cleaner (if used) using
1/4- in female quick connect terminals to the two male 1/4- in
quick- connect terminals on the control board marked EAC

and NEUTRAL. The terminals are rated for 115 VAC, 1.0
amps maximum and are energized during blower motor op-

eration. (See Fig. 23)

2. Humidifier (HUM)

Connect an accessory 115 VAC, 1 amp. maximum humidifi-

er (if used) to the 1/4- in male quick- connect HUM terminal
and NEUTRAL 1/4- in quick connect. The HUM terminal is

energized when the blower starts during a call for heat. (See
Fig. 23)

NOTE

: A field- supplied, 115- v controlled relay connected to

EAC terminals may be added if humidifier operation is desired

during blower operation.

NOTE

: DO NOT connect furnace control HUM terminal to

HUM (humidifier) terminal on humidity sensing thermostat, zone
controller or similar device. See humidity sensing thermostat,
zone controller, thermostat, or controller manufacturer’s
instructions for proper connection.

NOTE

:

DO NOT connect furnace control HUM 115VAC

terminal to H (humidifier) terminal on humidity sensing
thermostat, or similar device. See humidity sensing thermostat,
thermostat, or controller manufacturer’s instructions for proper
connection.

Summary of Contents for WFEU Series

Page 1: ...4 START UP ADJUSTMENT AND SAFETY CHECK 26 START UP PROCEDURES 26 ADJUSTMENTS 26 CHECK SAFETY CONTROLS 28 SERVICE AND MAINTENANCE PROCEDURES 30 INTRODUCTION 31 ELECTRICAL CONTROLS AND WIRING 31 CARE AN...

Page 2: ...and ventilation air to the furnace space as specified in Air for Combustion and Ventilation section 4 Combustion products must be discharged outdoors Connect this furnace to an approved vent system on...

Page 3: ...FURNACE SIZE A B C D VENT CABINET WIDTH IN MM OUTLET WIDTH IN MM TOP FLUE COLLAR ONLY IN MM BOTTOM WIDTH IN MM VENT CONNECTION SIZE IN MM SHIP WT LB KG WFEU040B036 17 1 2 445 15 7 8 403 11 9 16 294 16...

Page 4: ...ational Fuel Gas Code NFGC NFPA 54 ANSI Z223 1 and the Installation Standards Warm Air Heating and Air Conditioning Systems ANSI NFPA 90B General Installation S Current edition of the NFGC and the NFP...

Page 5: ...Firmly touch the clean unpainted metal surface of the furnace chassis which is close to the control Firmly touch the clean unpainted metal surface of the furnace chassis which is close to the control...

Page 6: ...nstallations may require OUTDOOR AIR for combustion due to chemical exposures S Commercial buildings S Buildings with indoor pools S Laundry rooms S Hobby or craft rooms and S Chemical storage areas I...

Page 7: ...00 4 400 5 500 6 600 0 20 3 150 4 200 5 250 3 300 4 950 6 600 8 250 9 900 0 10 6 300 8 400 10 500 6 600 9 900 13 200 16 500 19 800 0 00 NP NP NP NP NP NP NP NP Air Changes Hour FIRE HAZARD Failure to...

Page 8: ...ON AIR OPENINGS SHALL BE AT LEAST 3 IN 305mm 305mm 305mm 305mm 305mm 76mm Minimum dimensions of 3 in 76 mm NOTE Use any of the following combinations of openings A B C D D E F G A03174 Fig 7 Air for C...

Page 9: ...reely communicates with the outdoors provided there are adequate permanent ventilation openings directly to out doors having free area of at least 1 in 2 4 000 Btuh of total input rating for all gas a...

Page 10: ...ved for use on combustible flooring when any one of the following 3 accessories are used S Downflow combustible floor subbase S Manufacturer s approved Cased Coil or Coil Casing 1 Determine applicatio...

Page 11: ...20 508 20 508 HORIZONTAL INSTALLATION FIRE EXPLOSION AND CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury death and or property damage Do not install th...

Page 12: ...ing the furnace the return air shall also be handled by duct s sealed to the furnace casing and terminating outside the space containing the furnace Secure ductwork with proper fasteners for type of d...

Page 13: ...A02020 Fig 14 Duct Flanges 1 4 6mm THREADED ROD 4 REQ SECURE ANGLE IRON TO BOTTOM OF FURNACE WITH 3 8 x3 4 19mm SCREWS TYPICAL FOR 2 SUPPORTS 1 25mm SQUARE 1 1 4 x1 1 4 x1 8 32x32x3mm ANGLE IRON OR U...

Page 14: ...CH STRAP THE STRAPS SHOULD BE VERTICAL AGAINST THE FURNACE SIDES AND NOT PULL AWAY FROM THE FURNACE SIDES METHOD 1 FOLD ALL STRAPS UNDER FURNACE AND SECURE WTH 4 8 x 3 4 19 mm SHEET METAL SCREWS 2 SCR...

Page 15: ...pipe shall be installed at the furnace gas control valve and extend a minimum of 2 in 51 mm outside the furnace WARNING Gas piping must be installed in accordance with national and local codes Refer t...

Page 16: ...ow performance included 3 4 in 19 mm washable filter media such as contained in factory authorized accessory filter rack To determine airflow performance without this filter assume an additional 0 1 i...

Page 17: ...ge without notice 17 441 01 7201 00 A02075 Fig 19 Upflow Return Air Configurations and Restrictions A02163 Fig 20 Downflow Return Air Configurations and Restrictions A180279 Fig 21 Horizontal Return A...

Page 18: ...n electrical fault should occur This may consist of electrical wire conduit approved for electrical ground or a listed grounded power cord where permitted by local code when installed in accordance wi...

Page 19: ...ound wire to green ground screw on J Box bracket 5 Connect line voltage leads as shown in Fig 24 6 Reinstall cover to J Box Do not pinch wires between cover and bracket BX CABLE INSTALLATION IN FURNAC...

Page 20: ...C LINE CONNECTION L1 INDUCER MOTOR AND IGNITER 115 VAC NEUTRAL CONNECTOR ECM BLOWER 115VAC PRIMARY OF TRANSFORMER 115 VAC EAC 115 VAC WHEN USED FLAME SENSOR HUMIDIFIER 115 VAC WHEN USED NO CONNECTION...

Page 21: ...uilding codes the current edition of National Fuel Gas Code ANSI Z223 1 NFPA 54 NFGC Parts 12 and 13 the local building codes and furnace and vent manufacturers instructions These furnaces are design...

Page 22: ...207 299 15 4 5 NR 152 233 334 20 6 0 NR NR 250 368 30 9 1 NR NR NR 404 Table 9 Minimum Allowable Input Rating of Space Heating Appliance in Thousands of BTUH per Hour VENT HEIGHT FT M INTERNAL AREA O...

Page 23: ...Specifications are subject to change without notice 23 441 01 7201 00 A180242 Fig 25 Chimney Inspection Chart...

Page 24: ...ow does NOT count as part of the number of vent connector elbows The vent connector can exit the furnace through one of two locations on the casing 1 Attach the single wall vent connector to the furna...

Page 25: ...TES 1 2 4 7 8 9 on the page following these figures A03213 Fig 28 Horizontal Left Application Vent Elbow Left SEE NOTES 1 2 4 5 6 7 8 9 on the page following these figures A03207 Fig 29 Downflow Appli...

Page 26: ...Failure to make proper con nections will result in improper operation See Fig 24 3 Gas supply pressure to the furnace must be greater than 4 5 In W C 0 16 psig but not exceed 14 In W C 0 5 psig 4 Chec...

Page 27: ...liances and pilots served by the meter b Run furnace for 3 minutes in heating operation c Measure time in seconds for gas meter to complete 1 revolution and note reading The 2 or 5 cubic feet dial pro...

Page 28: ...cord amp draw across terminals when furnace is in heating and after blower starts 4 Set heat anticipator on thermostat per thermostat in structions and install on subbase or wall R Y W G 10 TURNS THER...

Page 29: ...kage from furnace vent elbow g Switch will auto reset when it cools h Re install vent connector Table 10 Gas Rate Cu Ft Hr SECONDS FOR 1 REVOLUTION SIZE OF TEST DIAL SECONDS FOR 1 REVOLUTION SIZE OF T...

Page 30: ...tlet Pressure for Gas Heat Values at Altitude 100 000 Tabulated Data Based on 100 000 BTUH Input for 0 ft 0m to 2000 ft 1524 M above sea level ALTITUDE RANGE ft m RANGE ft m HEAT VALUE AT ALTI TUDE Bt...

Page 31: ...trol See Fig 38 Any shorts of the 24 v wiring during installation service or maintenance will cause this fuse to blow If fuse replacement is required use ONLY a 3 amp fuse The control LED will display...

Page 32: ...essary 4 Check electrical connections for tightness and controls for proper operation each heating season Service as necessary 5 Inspect the vent pipe vent system before each heating season for rust c...

Page 33: ...6 If furnace is operating properly RELEASE BLOWER ACCESS DOOR SWITCH Remove any jumpers or reconnect any disconnected thermostat leads Replace blower access door 17 Reinstall outer door 18 Cycle furna...

Page 34: ...equate seal may occur and RTV sealant G E 162 6702 or Dow Corning 738 are needed before starting installation NOTE DO NOT substitute any other type of RTV sealant 12 Apply new sealant to flange of col...

Page 35: ...ation of the Heat Blower Off Delay timing The Heat Blower Off Delay is field selectable 90 120 150 180 NOTE 120 is default setting OFF The controls returns to the stand by mode until either a thermost...

Page 36: ...Specifications are subject to change without notice 36 441 01 7201 00 A180211 Fig 38 Wiring Diagram...

Page 37: ...ses and the CFH is present the furnace returns to normal operation Check Main limit Draft Safeguard Burner Thermal Switch are all in the Main Limit Circuit Check for any blockages in flue pipe or blow...

Page 38: ...IZE MAJOR SERIES MINOR SERIES WFEU 060 C 60 A 1 TO OBTAIN INFORMATION ON PARTS Consult your installing dealer or the classified section of your local telephone directory under the Heating Equipment or...

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