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

The switched 120VAC power from the LIMIT switch passes through the board between Pins 1&2 
of connector P1. 

 

Compressor contactor 

The control provides switched 24VAC to operate a compressor contactor.  Rating shall be class 2 - 24 
VAC pilot duty @ 24 VAC (< 200mA).   

EAC (electronic air cleaner) 

The control provides a 120VAC output for an electronic air cleaner. This output is energized whenever the fan 
motor is energized (either low, heat or cool speed).  Connection is made via male quick connect terminal 
labeled "EAC".

 

 

Humidifier

 

 

The control provides a 120 VAC output for a humidifier. Connections are made to a male quick connect 
terminal labeled "FAN".  The control does not switch this output, it provides a pass-through connection from 
P1-7 from the switched primary voltage of the Burner Module. In this application, the humidifier will operate 
on any blower operation. Humidifier should be controlled by humidistat to prevent operation during cooling 
fan operation. 

 

Status LED 

A red LED is provided to indicate any thermostat input has been recognized by the microprocessor on the 
control.  See Diagnostic Features for a function description of operation.   

Thermostat Input LEDs 

Four green LEDs are placed beneath their respective thermostat connections (W, Y, G and DEHUM) and 
operate whenever a call is present.  See Diagnostic Features for a function description of operation.   

Motor CFM LED 

 

This green LED will 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 continuously monitored.  The control initiates action when a thermostat call is received or limit 
switch opens. 

 Fan Mode  

A call for fan ("G") is received from the thermostat.  If no other mode is calling for blower operation, the 
control will choose a “Low” speed value from the position of DIP switch SW1 positions 4 through 6, as 
shown in the CFM Tables and operate the fan at that speed.  The fan mode will be operated as long as the 
"G" input is calling

 

and neither the Heat mode nor the Cool mode is calling for blower operation. When the 

Heat and Cool modes call for blower operation, their respective outputs will take over after their respective 
turn-on time delays have expired. The speed Output is present until the fan call is satisfied. 

Cooling Mode 

A call for cool ("Y") is received from the thermostat.  If the heat mode is not active or the anti-short cycle 
delay is not in effect, the control will energize the “CC” terminal.  After a 10 second delay blower ramps up to 
the “COOL” speed determined by the position of DIP switch SW1 (positions 4 through 6) determine a speed as 
shown in CFM Tables. 

Summary of Contents for OL11-105FDBE

Page 1: ...DS 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 QUALIFIE...

Page 2: ......

Page 3: ...I BLOWER CONTROL INFORMATION 1 A TERMINAL DEFINITIONS FIELD WIRING 1 B WIRING SWITCHES 2 C INPUTS 4 D OUTPUTS 4 E OPERATING MODES 5 F CFM TABLES 7 G ECM SPECIFIC REPLACEMENT PARTS 8 III ECM TROUBLESH...

Page 4: ...mostat 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 Sta...

Page 5: ...All installations and services must be performed by qualified service personnel 2 B WIRING SWITCHES OL11 OL16 LOWBOY Figure 1 BLOWER WIRING...

Page 6: ...lations and services must be performed by qualified service personnel 3 TURN OFF THE ELECTRICAL POWER to the furnace before attempting to disconnect blower wiring Figure 2 BOARD LAYOUT WITH SWITCHES B...

Page 7: ...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 8: ...their respective thermostat connections W Y G and DEHUM and operate whenever a call is present See Diagnostic Features for a function description of operation Motor CFM LED This green LED will flash...

Page 9: ...d low fire is activated for 15 minutes If a call for heat still exists high fire will be activated and will continue until the demand for heat has been satisfied Counterflow units in addition will run...

Page 10: ...es their tabular values are enacted when their function is called Three additional dip switches select 8 heating speeds which are enacted when heat is called This allows independent selection of heati...

Page 11: ...rness 350271 350271 Transformer 350464 350464 Power Choke 350855 COOLING SPEEDS HEATING SPEEDS TEMPERATURE RISE F Rise CFM COOL LOW DEHUM 3 ON 6 OFF 2 OFF 5 OFF 1 OFF 4 OFF 3 ON 6 OFF 2 OFF 5 OFF 1 ON...

Page 12: ...servicing motor Wait at least 5 minutes after disconnecting power before opening motor SYMPTOM CAUSE PROCEDURE Motor rocks slightly when starting This is normal start up for ECM Motor won t start No...

Page 13: ...moving panel or filter reduce puffing Reduce restriction Reduce max airflow Evidence of Moisture Motor failure or malfunction has occurred and moisture is present Replace motor and perform Moisture Ch...

Page 14: ...rain plugged Check for low airflow too much latent capacity Check for undercharged condition Check and plug leaks in return ducts cabinet Comfort Check Check proper airflow settings Low static pressur...

Page 15: ...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 16: ...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 17: ...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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