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MO-434 

ECN 5647

-MA 200813

 

 

 
 
 

ECM OPERATION MANUAL 

 

 

 

FOR USE WITH MODELS: 

 

OH5-85DE 

 

OL5-85FDE   

OL5-85RDE 

OH11-105DE  

OL11-105FDE 

OL11-105RDE 

OH2-56DE 

 

OL2-56FDE   

OL2-56RDE 

           OC5-85DE                    OC2-56DE               OH5-85DXE  

 

 

 

 

:  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. 

 
 

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 237 

 

 

 

 

DENTON, NC 27239

 

 

 

 

             MADE IN USA

 

Summary of Contents for OC2-56DE

Page 1: ...GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE INSTALLATION AND SERVICE MUST BE PERFORMED BY A QUALIFIED INSTALLER SERVICE AGENCY OR THE GAS SUPPLIER REF...

Page 2: ...SHIPPED SETTINGS 1 II BLOWER CONTROL INFORMATION 4 A TERMINAL DEFINITIONS FIELD WIRING 4 B WIRING SWITCHES 5 C INPUTS 9 D OUTPUTS 9 E OPERATING MODES 10 F CFM TABLES 12 G ECM SPECIFIC REPLACEMENT PAR...

Page 3: ...TION CFM 1000 1000 1000 3 SWITCH SELECTION CFM 1200 1200 1200 3 1 2 TON SWITCH SELECTION CFM 1400 1400 1400 HEATING HEATING HEATING 70deg SWITCH SELECTION CFM 737 1134 1335 APPROX TEMPERATURE RISE F 7...

Page 4: ...TION CFM 1000 1000 1000 924 3 SWITCH SELECTION CFM 1200 1200 1200 1276 3 1 2 TON SWITCH SELECTION CFM 1400 1400 1400 1474 4 TON 1600 HEATING HEATING HEATING HEATING 70deg SWITCH SELECTION CFM 737 1134...

Page 5: ...ION CFM 1200 1200 3 1 2 TON SWITCH SELECTION CFM 1400 1400 HEATING HEATING 70deg SWITCH SELECTION CFM 737 1134 APPROX TEMPERATURE RISE F 70 70 BLOWER MOTOR HP 1 2 1 2 NOZZLE SIZE 55 75 NOZZLE SPRAY AN...

Page 6: ...ostat call for heat R 24 VAC to thermostat G Thermostat call for fan Y Thermostat call for cool DEHUM Humidistat call for dehumidification TXV systems ONLY Thermostat Humidistat connections for 2 Stag...

Page 7: ...All installations and services must be performed by qualified service personnel 5 B WIRING SWITCHES HIGHBOY LOWBOY Figure 1 BLOWER WIRING...

Page 8: ...installations and services must be performed by qualified service personnel 6 TURN OFF THE ELECTRICAL POWER to the furnace before attempting to disconnect blower wiring COUNTERFLOW Figure 2 BLOWER WIR...

Page 9: ...tallations and services must be performed by qualified service personnel 7 TURN OFF THE ELECTRICAL POWER to the furnace before attempting to disconnect blower wiring OH5 85 DXE 2 STAGE Figure 3 BLOWER...

Page 10: ...lations and services must be performed by qualified service personnel 8 TURN OFF THE ELECTRICAL POWER to the furnace before attempting to disconnect blower wiring Figure 2 BOARD LAYOUT WITH SWITCHES B...

Page 11: ...oling is recognized when the thermostat connects Y to R This input has an indicator LED that will light when the control receives a call for cooling Refer to the Cool Mode section for the control oper...

Page 12: ...flash once for every 100CFM the blower is producing E Operating Modes Standby Mode All outputs are off and the control is waiting for a thermostat demand The thermostat inputs and limit switch are co...

Page 13: ...the burner is brought on They will continue at that speed until the delay time has elapsed The control remains in steady heat mode until the thermostat is satisfied When the call for heat signal is re...

Page 14: ...s F CFM TABLES The following tables contain blower speed settings and their respective air flowrates for the ECM blower motor To change air flowrates from that of the shipped settings use the respecti...

Page 15: ...r 350464 350464 350464 350464 350464 350464 III ECM TROUBLE SHOOTING A DIAGNOSTC FEATURES The control board is equipped with 4 green Input Status LEDs and 1 red Board Status LED These are intended to...

Page 16: ...motor for tight shaft Perform motor control replacement check Run Moisture Check Motor rocks but won t start Check for loose or compliant motor mount Make sure blower wheel is tight on shaft Perform...

Page 17: ...motor is bad Orient connectors down so water can t get in Install drip loops Locate connectors above 7 and 4 o clock positions Use authorized motor and control model s for replacement Replace one moto...

Page 18: ...ce personnel 16 Low static pressure for lowest noise Set low continuous fan CFM T stat in bad location Figure 3 ECM PIN CONNECTORS Troubleshooting table above and Figure 2 adapted from GE Industrial S...

Page 19: ...TO MOTOR IF CONNECTIONS ARE GOOD AND MOTOR STILL DOES NOT RUN REPLACE MOTOR THIS GUIDE SHOULD BE USED IN THE CASE OF A STOPPED OR MANFUNCTIONED ECM BLOWER MOTOR THE FOLLOWING SHOULD HELP ESTABLISH THE...

Page 20: ...Status LED Off 1 HEAT mode On 2 BLOWER HEAT 3 Status LED Flashes 1 COOL mode On 2 Blower On Delay Started 3 Condenser On 4 Status LED On continuous 1 FAN mode On 2 BLOWER LOW 3 Status LED On continuo...

Page 21: ...Fire Connect 2 Stage T stat to both W1 and W2 Single Stage T stat W2 Connect single stage T stat to W2 only BLOWER Speeds HEAT The Heating Blower speed selected by positions 1 2 3 of SW1 CFM tables o...

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