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Carrier 58EFB, Installation, Start-Up, And Operating Instructions Manual, Page: 10 / 20

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Carrier 58EFB Installation, Start-Up, And Operating Instructions Manual Download Page 10

The cabinet must have an uninterrupted or unbroken ground
according to National Electrical Code, ANSI/NFPA 70-1996,
Canadian Electrical Code, CSA C22.1, or local codes to
minimize personal injury if an electrical fault should occur.
This ground may consist of electrical wire or conduit ap-
proved for electrical ground when installed in accordance
with existing electrical codes. Do not use gas piping as an
electrical ground. Failure to follow this warning could result
in an electrical shock, fire, or death.

NOTE:

Proper polarity must be maintained for 115-v wiring for

ignition control to function properly. Connect "hot" wire H and
"ground" wire G as shown in Fig. 12.

If manual disconnect switch is to be mounted on the furnace,
select a location where a drill or fastener will not contact
electrical or gas components.

Step 2—24-v Wiring

Make field 24-v thermostat connections at the 24-v terminal block.
Connect Y terminal as shown in Fig. 10 for proper cooling
operation. The 24-v control board is marked for easy connection of
field wiring. (See Fig. 11.)

NOTE:

Use AWG No. 18 color coded copper thermostat wire for

lengths up to 100 ft. For wire lengths over 100 ft, use AWG No.
16 wire.

Step 3—Accessories

Install accessories per manufacturer’s instructions. Other than
wiring for thermostat, a minimum of type T wire (63°F/35°C rise)
must be used.

1. Electronic Air Cleaner (EAC)

Two 1/4-in. quick-connect terminals marked EAC and N are
provided for EAC connection. (See Fig. 11.) These terminals
are energized with 115v (0.5-amp maximum) during blower
motor operation.

2. Humidifier (HUM)

Two 1/4-in. quick-connect terminals marked HUM and N are
provided for 115-v humidifier connection. (See Fig. 11.)
These terminals are energized with 115v (0.5-amp maximum)
during any call for heat.

Cycle test furnace and accessories twice to ensure proper opera-
tion.

Fig. 10—Heating and Cooling Application Wiring Diagram

A96104

1.  Connect Y-terminal as shown for proper cooling operation.
2.  If any of the original wire, as supplied, must be replaced,
     use same type or equivalent wire.
3.  Proper polarity must be maintained for 115-volt wiring.
4.  Some thermostats require a "C" terminal connection as shown.

NOTE :

115-VOLT

FIELD-SUPPLIED

FUSED DISCONNECT

24-VOLT

TERMINAL

BLOCK

THREE-WIRE

HEATING

ONLY

FIVE

WIRE   

NOTE 4

THERMOSTAT
TERMINALS

FIELD-SUPPLIED
FUSED DISCONNECT

CONDENSING

UNIT   

TWO
WIRE

R

G

C

W

R

C

G

Y

GND

GND

FIELD 24-VOLT WIRING
FIELD 115-, 208/230-, 460-VOLT WIRING
FACTORY 24-VOLT WIRING
FACTORY 115-, 208/230-, 460-VOLT WIRING

208/230- OR
460-VOLT
THREE
PHASE

208/230-
VOLT
SINGLE
PHASE

W

Y

GND

GND

GND

115-VOLT

SINGLE

PHASE

GND

Fig. 11—Control Board

A96103

C

G

UNUSED

DI

1

SPEED

UP

N

NEUTRAL

2

3

4

C

XFMR

SEC

X

X

MOTOR

LEADS

Y W

R

S

3

2

HUM

EAC

C

Y

N

N

CIR

T

W

I

N

CONT

HEAT

5

COOL

BLWR

1

S

10

Summary of Contents for 58EFB

Page 1: ... can perform basic maintenance functions such as cleaning and replacing air filters All other operations must be performed by trained service personnel When working on heating equipment observe precautions in the literature on tags and on labels attached to or shipped with the unit and other safety precautions that may apply Follow all safety codes In the United States follow all safety codes incl...

Page 2: ...d to interface with split system cooling equipment approved by UL to provide year round air condition ing The blower is sized for both heating and cooling and the furnace control includes a cooling fan relay Before installing furnace in the United States refer to the current edition of the NFGC and the NFPA 90B For further information the NFGC and NFPA 90B are available from National Fire Protecti...

Page 3: ...the back of the furnace Failure to follow this warning could result in a fire personal injury or death When a furnace is installed so that the supply ducts carry air to areas outside the space containing the furnace return air must also be handled by duct s sealed to furnace casing and terminating outside the space containing furnace to ensure there will not be a negative pressure condition within...

Page 4: ...alled in an area along with 1 or more gas appliances the total Btuh input of all appliances must be included when determining the free area require ments for combustion and ventilation openings The requirements for combustion and ventilation air depend upon whether the furnace is located in a confined or unconfined space Step 2 Unconfined Space An unconfined space must have at least 50 cu ft for e...

Page 5: ...outlet duct if not removed Remove bracket by removing No 10 screws located on bottom panel duct supply flange rotating bracket forward and lifting out The proper sizing of warm air ducts is necessary to ensure satisfactory furnace operation Duct work should be in accordance with the latest editions of U S NFPA 90A Air Conditioning Systems and NFPA 90B Warm Air Heating and Air Condition ing Systems...

Page 6: ...t supply and return air ducts 5 Install 24 X 24 in sheet metal shield on platform in front of controls as shown in Fig 3 Step 3 Horizontal Crawlspace Installation The furnace can be installed horizontally for either left or right side supply In a crawlspace the furnace can either be hung from floor joists or installed on suitable blocks or a pad The furnace can be suspended using steel pipe straps...

Page 7: ...e tap on gas control meets this requirement Use the proper length of pipes to avoid stress on the gas control manifold A failure to follow this warning could result in a gas leak resulting in a fire explosion personal injury or death Before any system of gas piping is finally put into service it should be carefully tested to determine if it is gas tight The piping must stand a pressure of 6 in of ...

Page 8: ... assembly While removing burner manifold assembly disconnect violet colored rollout switch wires from rollout switch See Fig 6 5 On burner manifold assembly remove 2 screws that fasten rollout switch bracket to rollout switch base bracket See Fig 7 6 With rollout switch base bracket still attached to burner manifold assembly turn assembly over so that pilot burner is on top 7 Place rollout switch ...

Page 9: ... this equipment Refer to rating plate or to Table 4 for equipment electrical specifications Do not connect aluminum wire between the disconnect switch and the furnace Use only copper wire Make all electrical connections in accordance with the National Electric Code ANSI NFPA 70 1996 and any local codes or ordinances that might apply For Canadian installations all electrical connections must be mad...

Page 10: ...mostat a minimum of type T wire 63 F 35 C rise must be used 1 Electronic Air Cleaner EAC Two 1 4 in quick connect terminals marked EAC and N are provided for EAC connection See Fig 11 These terminals are energized with 115v 0 5 amp maximum during blower motor operation 2 Humidifier HUM Two 1 4 in quick connect terminals marked HUM and N are provided for 115 v humidifier connection See Fig 11 These...

Page 11: ...TION FAN BL 4 3 L M H INDOOR BLOWER MOTOR INDUCER BLOWER C 2 1 BK WH RD BK WH RD YL BL OR BL VI VI 24V PRESS SW 24V COM 24V HOT EFT OUTPUT BR YL VI RD BK PILOT SV9500 BR BR CAP S 1 71 72 T W I N 2 C W Y G R L P ROS G Y W F1 GND R D1 HUM EAC N N CIR BLWR 4 C 3 2 X NEUTRAL 1 1 N CONT XFMR SEC UNUSED MOTOR LEADS HEAT COOL 5 4 1 2 1 2 1 2 1 2 3 2 1 Honeywell ST9120C 16 CU SEE NOTE 6 SEE NOTE 7 HORIZON...

Page 12: ...t pipe must extend at least 3 ft above the highest point where it passes through a roof of a building and at least 2 ft higher than any portion of a building within a horizontal distance of 10 ft It shall also extend at least 5 ft above highest connected equipment flue collar NOTE The GAMA venting tables MUST be used DO NOT use Carrier s Single Stage Vent Tables for Category I Fan Assisted Furnace...

Page 13: ...n wall thermostat calls for heat the R W circuit closes 1 Inducer start up sequence Power from transformer energizes fan control board The fan control energizes the induced draft blower motor Pressure switch P normally open contacts close to energize ignition module 2 Ignition module self check Upon being energized the igni tion module performs a 2 sec self check The ignition module checks for the...

Page 14: ...n below 7 When main burners ignite proceed to Set Gas Input Rate section Step 5 Adjustments ADJUST PILOT FLAME Pilot assembly should be located as shown in Fig 13 Adjust pilot flame to envelop the flame sensor for a distance of 3 8 to 1 2 in See Fig 14 The adjusting screw for pilot flame is located on main gas control See Fig 15 SET GAS INPUT RATE Never set furnace input rate above that shown on r...

Page 15: ... 38 39 3 2 3 5 3 8 37 38 3 3 3 6 37 38 3 4 3 8 36 37 3 2 3 5 36 37 3 3 3 6 36 37 3 4 3 7 36 3 5 35 36 3 2 3 6 905 38 39 40 3 3 3 6 3 8 38 39 3 4 3 7 37 38 39 3 2 3 5 3 8 37 38 3 3 3 6 37 38 3 4 3 8 36 37 3 2 3 5 36 37 3 3 3 6 36 37 3 4 3 7 36 37 3 5 3 8 920 38 39 40 3 2 3 4 3 7 38 39 40 3 3 3 6 3 8 38 39 3 4 3 7 37 38 39 3 2 3 5 3 8 37 38 3 3 3 6 37 38 3 4 3 7 36 37 3 2 3 5 36 37 3 3 3 6 36 37 3 4...

Page 16: ...as follows a Remove manifold pipe cover and burner removal cover air inlet plate b Remove manifold retention plate c Pull manifold burner assembly out past support pins and remove assembly NOTE It is only necessary to remove 1 manifold retention plate to gain access to burners d Remove burners from assembly and change orifices as required e Reinstall assembly by reversing the procedure in items a ...

Page 17: ...ck speed selector located at the blower motor See Table 8 Recheck the temperature rise It must be within limits specified on the unit rating plate Recommended operation is at midpoint of rise or above SET BLOWER OFF DELAY The blower off delay may be adjusted for a 60 factory setting 90 120 or 150 sec delay Set the DIP switches on the control board to obtain desired time delay See Fig 17 SET THERMO...

Page 18: ...rn off 115 v power to furnace 2 Remove control box cover and disconnect inducer motor lead wires from control board 3 Turn on 115 v power to furnace 4 Set thermostat to call for heat When pressure switch is functioning properly ignitor should not glow If ignitor glows when inducer motor is disconnected shut down furnace immediately Determine the reason pressure switch did not function properly and...

Page 19: ...roduct theory and skills programs is available using popular video based formats and materials All include video and or slides plus companion book Classroom Service Training plus hands on the products in our labs can mean increased confidence that really pays dividends in faster troubleshooting fewer callbacks Course descriptions and schedules are in our catalog CALL FOR FREE CATALOG 1 800 962 921...

Page 20: ...6231 58efb1si Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 4 Tab 6a 8a PC 101 Catalog No 565 883 Printed in U S A Form 58EFB 1SI Pg 20 5 96 Replaces 58EFA 3SI ...

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