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Carrier 58EFB, Installation, Start-Up, And Operating Instructions Manual, Page: 11 / 20

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Carrier 58EFB Installation, Start-Up, And Operating Instructions Manual Download Page 11

Fig. 12—Wiring Diagram

A96076

FACTORY SET

HEATING SPEED

ENLARGED TOP VIEW 6-PIN PLUG (CN23)

GND

L2 (N)

L1 (H)

BI

WH

BK

50, 75K INPUT

100, 125K INPUT

POWER SUPPLY
115 VAC 1 PH 60 HZ
(FUSED DISCONNECT
ON HOT LEG)

60 SEC

DELAY OFF DIP SWITCH SETTINGS

90 SEC

120 SEC

150 SEC

50 & 75K INPUTS-LOW (L)

100 & 125K INPUTS-MEDIUM (M)

6

12

L2(N)

115 VAC 1Ø 60 HZ POWER SUPPLY

(FUSED DISCONNECT ON HOT LEG)

L1(H)

N1

N2

LOW

MED

50, 75

100, 125

HEAT

K1

K2

K2

K3

D1

COOL

GND

BI

S1

S2

HI

N3

N4

C

GND

TSTAT

CN23-2

LOW SPEED

HEAT CONNECTION

CONTINUOUS LOW SPEED FAN OPTIONS

CONTINUOUS LOW SPEED FAN WITH

OPTIONAL INTERUPT FAN SWITCH

CONSTANT

CONSTANT

CONSTANT

HEAT

MED

LOW

HIGH

HEAT

COOL

COOL

UNUSED MOTOR

LEAD

N2

GND

FT

SV9500 HOT SURFACE PILOT

IGNITION SYSTEM CONTROL

TSTAT

24V

X

CN23-1

LIMIT

CONTROL

ROS

L
P
ROS
BI
CU

*

T
F1

LEGEND

PRINTED CIRCUIT
BOARD WIRING

BK
BL
BR
GR
OR
RD
RD/BK
VI
WH
YL

BLACK
BLUE
BROWN
GREEN
ORANGE
RED
RED/BLACK STRIPE
VIOLET
WHITE
YELLOW

LINE V
24V

FACTORY WIRING

FIELD WIRING

ORANGE WIRE NUT
GROUND

LIMIT
PRESSURE SWITCH
ROLL OUT SWITCH*
BLOWER INTERLOCK
CONDENSING UNIT
MANUAL RESET
TRANSFORMER
LOW VOLT. FUSE

PS1

CN23-6

PS2

W1

CN23-3

COM

N.C.

G

CN23-5

N.O.

PRESSURE SW.

(115VAC)

24VAC

TRANSFORMER

CONDENSING

UNIT

ST9120C2010 ELECTRONIC

FAN TIMER

INDUCER

MOTOR

CIRCULATION

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

*

GY

W

F1

GND

R

D1

HUM

EAC

N

N

CIR

BLWR

4C

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

HORIZONTAL GAS FURNACE WITH HONEYWELL ST9120C FAN TIMER & SV9500 SMART VALVE

NOTES:
1.  Make field power supply connections to black and white wires
     capped with orange wire nuts.
2.  WARNING---unit must be grounded.  Wiring must conform to N.E.C. and
     local codes.
3.  If any of the original wire, as supplied with the furnace, must be replaced,
     it must be replaced with wiring material having a temperature 
     rating of at least 105

°

C and be a minimum of 16 gage AWG  copper strand wire.

4.  Connect required motor lead to heat terminal on circuit board to deliver a
     temperature rise within the range specified on the rating label.  Connect
     unused leads to the unused motor leads.
5.  Set the heat anticipator on the thermostat at .40 amps.
6.  Low voltage fuse 5 amp automotive type littlefuse 257005 or buss ATCS.
7.  Both EAC and HUM terminals are 115V.

W

C

Y

R

MED

LOW

HIGH

MED

LOW

HIGH

MEDIUM SPEED

HEAT CONNECTION

N2

LOW SPEED

HEAT CONNECTION

N2

MEDIUM SPEED

HEAT CONNECTION

N2

HEAT

COOL

UNUSED MOTOR

LEAD

CONSTANT

FAN
SWITCH

FAN
SWITCH

HEAT

COOL

MED

LOW

HIGH

LINE V
24V

LINE V
24V

JUMPER

11

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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