manualshive.com logo in svg

Carrier 170 Series, Service And Maintenance Instructions, Page: 9 / 16

Share
Download
Carrier 170 Series Service And Maintenance Instructions Download Page 9

→

Fig. 12—Furnace Wiring Diagram

A00304

PCB

BLOWER OFF DELAY

SELECTION CHART

90 SEC

135 SEC

180 SEC

225 SEC

GVR

HI/LO

RELAY

SEC-1

SEC-2

PL1

3 2 1

6 5 4
9 8 7

LED

TEST/TWIN

BLOWER

OFF

DELAY

G
R
Y

W
C

HUM

HSIR

IDR

BLWR

BLOWER

SPEED

SELECT

FU1

COOL

HEAT

L2

PL3

PL2

VAC

120

L1

PR1

1

2

1
2
3

PR2

24 VAC-3A

FUSE

SPARE-2

SPARE-1

EAC-1

EAC-2

C

1.

5

 A

M

P

1

2

PL5

WHT

BLK

WHT

WHT

BL

K

BL

K

HSI

BLK

WHT

WHT   (COM)

RED   (LO)

BLU (MED LO)

NOTE #7

OL

START

BLWM

YEL (MED HI)

BLK  (HI)

BRN

BRN

TR

A

N

BLU

RED

BLK

WHT

WHT (COM)

CAP

RED

RED

ORN

FUSED DISCONNECT

SWITCH (WHEN REQ’D)

NOTE #4

FU2

BLK

WHT

JB

LEGEND

ALS

AUXILIARY LIMIT SWITCH, OVERTEMP. -MANUAL RESET, SPST-(N.C.)

BLWR

BLOWER MOTOR RELAY, SPST-(N.O.)

BLWM BLOWER MOTOR
BVSS

BLOCKED VENT SHUTOFF SWITCH, SPST - (N.C.)

CAP

CAPACITOR

CPU

MICROPROCESSOR AND CIRCUITRY

DSS

DRAFT SAFEGUARD SWITCH

EAC-1

ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1.5 AMP MAX.)

EAC-2

ELECTRONIC AIR CLEANER CONNECTION (COMMON)

FL

FUSIBLE LINK

FRS

FLAME ROLLOUT SW. -MANUAL RESET, SPST-(N.C.)

FSE

FLAME PROVING ELECTRODE

FU1

FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED

FU2

FUSE OR CIRCUIT BREAKER CURRENT INTERRUPT DEVICE
(FIELD INSTALLED & SUPPLIED)

GV

GAS VALVE-REDUNDANT OPERATORS

GVR

GAS VALVE RELAY, DPST-(N.O.)

HI/LO

BLOWER MOTOR SPEED CHANGE RELAY, SPDT

HSI

HOT SURFACE IGNITOR (115 VAC)

HSIR

HOT SURFACE IGNITOR RELAY, SPST-(N.O.)

HUM

24VAC HUMIDIFIER CONNECTION (.5 AMP. MAX.)

IDM

INDUCED DRAFT MOTOR

IDR

INDUCED DRAFT RELAY, SPST-(N.O.)

ILK

BLOWER ACCESS PANEL INTERLOCK SWITCH, SPST-(N.O.)

JB

JUNCTION BOX

LED

LIGHT-EMITTING DIODE FOR STATUS CODES

LGPS

LOW GAS PRESSURE SWITCH, SPST-(N.O.)

LS

LIMIT SWITCH, AUTO RESET, SPST(N.C.)

OL

AUTO-RESET INTERNAL MOTOR OVERLOAD TEMP. SW.

PCB

PRINTED CIRCUIT BOARD

PL1

9-CIRCUIT CONNECTOR

PL2

2-CIRCUIT PCB CONNECTOR

PL3

3-CIRCUIT IDM CONNECTOR

PL5

2-CIRCUIT HSI/PCB CONNECTOR

PRS

PRESSURE SWITCH, SPST-(N.O.)

TEST/TWIN

COMPONENT TEST & TWIN TERMINAL

TRAN

TRANSFORMER-115VAC/24VAC

JUNCTION

UNMARKED TERMINAL

PCB TERMINAL

FACTORY WIRING (115VAC)

FACTORY WIRING (24VAC)

FIELD WIRING (115VAC)

FIELD WIRING (24VAC)

CONDUCTOR ON PCB

FIELD WIRING TERMINAL

FIELD GROUND

EQUIPMENT GROUND

FIELD SPLICE

PLUG RECEPTACLE

L1

L2

L1

BLWR

HI/LO

TO 115VAC FIELD DISCONNECT

NOTE #4

EQUIPMENT GROUND

SPARE-2

HEAT

SPARE-1

COOL

NOTE #7

COM

HSIR

EAC-1

START

OL

COM

HI

MED HI

MED LO

LO

BLWM

SCHEMATIC DIAGRAM

(NATURAL GAS & PROPANE)

EAC-2

1

1

HSI

2

PL5

2

PL2

3 PL3

PR2

115VAC

PR1

TRAN

24VAC

1

2

IDR

TEST/TWIN

FU1

NOTE #6

CAP

L2

PL1

8

FSE

9

6

5

CPU

HSIR

IDR

BLWR

Y

G

C

R

W

GVR-2

SEC-1

HI/LO

GVR

SEC-2

NOTES:

322869-101 REV. H

1. If any of the original equipment wire is replaced use wire rated for 105

°

C.

2. Inducer (IDM) and blower (BLWM) motors contain internal auto-reset thermal overload switches (OL).
3. Blower motor speed selections are for average conditions, see installation instructions for details on

optimum speed selection.

4. Use only copper wire between the disconnect switch and the furnace junction box (JB).
5. This wire must be connected to furnace sheetmetal for control to detect flame.
6. Replace only with a 3 amp fuse.
7. Yellow lead not on all motors.
8. Blower-on delay, gas heating 45 seconds, cooling or heat pump 2 seconds.
9. Blower-off delay, gas heating 90, 135, 180 or 225 seconds, cooling or heat pump 90 seconds.

(135 seconds only on some models)

10. Ignition-lockout will occur after four consecutive unsuccessful trials-for-ignition. Control will auto-reset

after three hours.

11. When used, auxiliary limit switch (ALS) is on some downflow models only. When used, FL is on

upflow models only.

12. Some models may have spade quick connect terminals.
13. Factory connected when LGPS is not used.
14. Factory connected when BVSS is not used. BVSS used when Chimney Adapter Accessory Kit is

installed.

15. Gas valve leads are interchangeable on single stage valves.

BL

K

OM

SW2

SW1

OM

3

4

7

1

OM

HUM

IDM

ILK

DSS

BVSS

PRS

ILK

L1

NEUTRAL

IDM

(WHEN USED)

NOTE #14

NOT USED

NOT USED

NOT USED

FSE

BLU

PRS

DSS

BVSS

(WHEN USED)

NOTE #14

WHT

LS

FL

(NOT ON ALL MODELS)

NOTE #9

FRS1

FRS2

LS

FL

NOTE #12

ORN

ORN

ORN

ALS

(WHEN USED)

ORN

NOTE #11

LGPS

(WHEN USED)

NOTE #13

NOTE #14

NOTE #11

2

GVR-1

NOTE #14

ALS

(WHEN USED)

(WHEN USED)

NOTE #13

LGPS

(WHEN USED)

NOTE #13

YEL

FRS1

FRS2

(WHEN USED) NOTE #11

GRN/YEL

GRN/YEL

GND

NOTE #5

GRN/YEL

NOTE #5

GRN/YEL

NOTE #15

NOTE #15

GV

GV

9

Summary of Contents for 170 Series

Page 1: ... safety codes including the National Fuel Gas Code NFGC NFPA 54 1999 ANSI Z223 1 1999 NFPA 90B In Canada refer to the CAN CGA B149 1 and 2 M95 National Standard of Canada Natural Gas and Propane Installation Codes NSCNGPIC Wear safety glasses and work gloves Have fire extinguisher available during start up and adjustment procedures and service calls Recognize safety information This is the safety ...

Page 2: ...l sources may also be used to prevent ESD damage CARE AND MAINTENANCE For continuing high performance and to minimize possible equip ment failure it is essential that periodic maintenance be performed on this equipment Consult your local dealer as to the proper frequency of maintenance and the availability of a maintenance contract Never store anything on near or in contact with the furnace such a...

Page 3: ...and let dry Oiling or coating of filter is not recommended or required g Reinstall filter s h Replace blower and control access doors i Restore electrical power to furnace BLOWER MOTOR AND WHEEL The following steps should be performed by a qualified service technician To ensure long life economy and high efficiency clean accumu lated dirt and grease from blower wheel and motor annually The inducer...

Page 4: ...efer to Table 3 for motor speed lead relocation if leads were not identified before disconnection Heating air speed selection MUST be adjusted to provide proper air temperature rise as specified on the rating plate Failure to adjust the heating speed may shorten heat ex changer life 14 Downflow furnaces only Reinstall internal vent pipe and enclosure by reversing items 3a through 3d NOTE A releasi...

Page 5: ...ature switch es e Gas valve f Hot surface igniter g Flame sensing electrode h Flame rollout switch es if applicable 7 Remove complete inducer assembly and relief box from furnace 8 Remove 8 screws that secure flue collector box to center panel Be careful not to damage collector box 9 Remove burner assembly and cell inlet plates IMPORTANT Replace screws in center panel and cells before cleaning NOT...

Page 6: ...2 Replace control access door on upflow furnace 23 On downflow horizontal furnaces remove blower access door replace control access door first then replace blower access door and secure with screws in front of door ELECTRICAL CONTROLS AND WIRING There may be more than 1 electrical supply to the unit Check accessories and cooling unit for additional electrical supplies The electrical ground and pol...

Page 7: ...to follow this warning could result in personal injury or death d BRIEFLY short jumper TEST 3 16 in quick connect terminal on control adjacent to LED diagnostic light and COM 24V terminal on furnace thermostat connection block See Fig 11 NOTE If TEST to COM 24V terminals are jumpered longer than 2 sec LED will flash rapidly and test request will be ignored e Component Test will function as describ...

Page 8: ...ANSFORMER SEC 2 SPARE 1 SPARE 2 EAC 1 EAC ELECTRONIC AIR CLEANER TERMINALS 115 VAC 1 0 AMP MAX EAC 2 115 VAC L2 NEUTRAL CONNECTION 24 V THERMOSTAT TERMINALS BLOWER SPEED SELECTION TERMINALS INDUCER MOTOR CONNECTOR 115 VAC L1 POWER SUPPLY HOT SURFACE IGNITOR CONNECTOR HEAT SEC 1 C OM 24V HUM G R Y W TEST TWIN COOL 3 AMP FUSE 8 ...

Page 9: ...VAC CONDUCTOR ON PCB FIELD WIRING TERMINAL FIELD GROUND EQUIPMENT GROUND FIELD SPLICE PLUG RECEPTACLE L1 L2 L1 BLWR HI LO TO 115VAC FIELD DISCONNECT NOTE 4 EQUIPMENT GROUND SPARE 2 HEAT SPARE 1 COOL NOTE 7 COM HSIR EAC 1 START OL COM HI MED HI MED LO LO BLWM SCHEMATIC DIAGRAM NATURAL GAS PROPANE EAC 2 1 1 HSI 2 PL5 2 PL2 3 PL3 PR2 115VAC PR1 TRAN 24VAC 1 2 IDR TEST TWIN FU1 NOTE 6 CAP L2 PL1 8 FSE...

Page 10: ...lame roll out switch requires manual reset Check for Defective blower motor or capacitor Dirty filter or restricted duct system Loose blower wheel Defective switch or connections Inadequate combustion air supply Flame Roll out Switch or fuse link open Open Flame Roll out Switch or fuse link Manual reset or replace IGNITION PROVING FAILURE Control will try three more times before lockout 14 occurs ...

Page 11: ...11 ...

Page 12: ...un for the entire component test The HSI blower motor heat speed and blower motor cool speed will run for 10 15 sec each Determine status code The status code is a 2 digit number with the first digit determined by the number of short flashes and the second digit by the number of long flashes Was there a previous fault code other than No 11 Does control respond to W Y or G 24 vac thermostat signals...

Page 13: ...e gas valve was de energized Inducer will run until fault is cleared Check for Stuck open gas valve solenoid or leak Defective control center 23 PRESSURE SWITCH WILL NOT OPEN Check for Disconnected or obstructed pressure tubing Defective pressure switch 24 LOW VOLTAGE FUSE IS OPEN Check for Short in low voltage wiring including thermostat leads shorting to ductwork or furnace cabinet Disconnect th...

Page 14: ...14 ...

Page 15: ...15 ...

Page 16: ... 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 9212 Packaged Service Training Classroom Service Training Copyright 2000 CARRIER Corp 7310 W Morris St Indianapolis IN 46231 58pr15sm Manufacturer reserves the right t...

Reviews:

No comments