Thermo Products CHX3-75N, CDX3-125N, CHX3-100N, CHX3-125N, CDX3-100N User Manual

ECM OPERATION MANUAL

FOR USE WITH MODELS:

CHX3-75N CDX3-75N

CHX3-100N CDX3-100N
CHX3-125N CDX3-125N

: IF YOU DO NOT FOLLOW THE SAFETY PRECAUTIONS BELOW AND IN THIS MANUAL, A
FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY, OR LOSS OF
LIFE.

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF
THIS OR ANY OTHER APPLIANCE.

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.

• LEAVE THE BUILDING IMMEDIATELY.

• 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 DEPARTMENT.
INSTALLATION AND SERVICE MUST BE PERFORMED BY A QUALIFIED INSTALLER, SERVICE AGENCY OR

THE GAS SUPPLIER. (REFERRED TO IN THESE INSTRUCTIONS AS A QUALIFIED HEATING
CONTRACTOR).

PLEASE READ THESE INSTRUCTIONS PRIOR TO INSTALLATION, INITIAL FIRING, AND BEFORE
PERFORMING ANY SERVICE OR MAINTENANCE. THESE INSTRUCTIONS MUST BE LEFT WITH THE
HOMEOWNER AND SHOULD BE RETAINED FOR FUTURE REFERENCE BY QUALIFIED SERVICE
PERSONNEL.

THERMO PRODUCTS, LLC.

BOX 217
NORTH JUDSON, IN 46366
PHONE: [phone]

MADE IN USA

MG-1037

ECN 5262-MA 120326

All installations and services must be performed by qualified service personnel.

INDEX

SECTION BEGINNING PAGE

I. FURNACE SPECIFICTIONS (SHIPPED SETTINGS) 1

II. BLOWER INFORMATION 3
A. WIRING 3
B. CFM TABLES 5

III. ECM TROUBLESHOOTING 9
A. GENERAL GUIDELINES TO TROUBLESHOOTING GE ECM 9
B. TROUBLESHOOTING CHARTS 12

i

All installations and services must be performed by qualified service personnel.

MODEL NO.

CHX3-75

CHX3-100

CHX3-125

HEAT INPUT RATE IN BTU/ HR
(High fire/ Low fire)

75,000 / 52,000

100,000 / 70,000

125,000 / 87,500

HEATING CAPACITY IN BTU/HR
(High fire/ Low fire)

70,875 / 49,612

94,500 / 66,150

117,500 / 82,250

HEIGHT OF CASING

44-1/4”

44-1/4”

44-1/4”

WIDTH OF CASING

17”

21”

24”

DEPTH OF CASING

27-1/2”

27-1/2”

27-1/2”

WARM AIR OUTLET

15 x 18

19 x 18

22 x 18

RETURN AIR INLET

25 x 16

25 x 16

25 x 16

DIA. OF FLUE

2”

3”

3”

DIA. OF COMBUSTION
AIR INTAKE

FLOWRATE from .2” & .5” w.c.
EXTERNAL STATIC PRESSURE

@COOLING TAP A (CFM)

1000

1200

1400

@COOLING TAP B (CFM)

800

1000

1200

@COOLING TAP C (CFM)

1200

1400

1600

@COOLING TAP D (CFM)

1400

1600

2000

HEATING

HEATING

HEATING

@HEATING TAP A
(CFM @High fire/Low fire)

931 / 760

1243 / 1015

1556 / 1270

TEMPERATURE RISE (° F)

70 / 60

70 / 60

70 / 60

BLOWER MOTOR HP

.5

.75

1

POWER CHOKES

-

2.65 Mh

2.1 Mh

LARGEST RECOMMENDED
AIR CONDITIONER

SIZE OF FILTERS

24-3/4” x 15-3/4”

24-3/4” x 15-3/4”

24-3/4” x 19-3/4”

I. FURNACE SPECIFICATIONS (SHIPPED SETTINGS)

CHX3 SERIES

2” 3” 3”

COOLING COOLING COOLING

NOTES:

1. Heating capacity based on annual fuel utilization efficiency rated by manufacturer.

2. On all outlet and inlet dimensions, the first dimension is width.

3. Electrical characteristics at 115 volts, 60 Hz., 1 phase (less than 15 amps, for all models).

4. All specifications are subject to change without notice.

3.5 Ton 4 Ton 5 Ton

1

All installations and services must be performed by qualified service personnel.

MODEL NO.

CDX3-75

CDX3-100

CDX3-125

HEATING INPUT RATE IN BTU / HR
(High fire / Low fire)

75,000 / 56,250

100,000 / 75,000

125,000 / 93,750

HEATING CAPACITY IN BTU/HR
(High fire / Low fire)

69,750 / 52,312

93,000 / 69,750

116,250 / 87,187

HEIGHT OF CASING

46-1/4”

46-1/4”

46-1/4”

WIDTH OF CASING

17”

21”

24”

DEPTH OF CASING

27-1/2”

27-1/2”

27-1/2”

WARM AIR OUTLET

15 x 18

19 x 18

22 x 18

RETURN AIR INLET

15 x 22

19 x 22

22 x 22

DIA. OF FLUE

2”

3”

3”

DIA. OF COMBUSTION
AIR INTAKE

FLOWRATE from .2” & .5” w.c.
EXTERNAL STATIC PRESSURE

@COOLING TAP A (CFM)

1000

1200

1400

@COOLING TAP B (CFM)

800

1000

1200

@COOLING TAP C (CFM)

1200

1400

1600

@COOLING TAP D (CFM)

1400

1600

2000

HEATING

HEATING

HEATING

@HEATING TAP C
(CFM @ High fire / Low fire)

1012 / 826

1340 / 1094

1673 / 1366

TEMPERATURE RISE (° F)

65 / 60

65 / 60

65 / 60

BLOWER MOTOR HP

.5

.75

1

POWER CHOKES

-

2.65Mh

2.1Mh

LARGEST RECOMMENDED
AIR CONDITIONER

SIZE OF FILTERS

21-3/4” x 14”(2)

21-3/4” x 14”(2)

21-3/4” x 14”(2)

CDX3 SERIES

2” 3” 3”

COOLING COOLING COOLING

NOTES:

1. Heating capacity based on annual fuel utilization efficiency rated by manufacturer.

2. On all outlet and inlet dimensions, the first dimension is width.

3. Electrical characteristics at 115 volts, 60 Hz., 1 phase (less than 15 amps. for all models).

4. All specifications are subject to change without notice.

3.5 Ton 4 Ton 5 Ton

2

All installations and services must be performed by qualified service personnel.

II. BLOWER INFORMATION

A. WIRING

Figure 1: BLOWER WIRING

: TURN OFF THE ELECTRICAL POWER to the furnace before atte mpting to disconnect blowe r
wiring.

3