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

executed prior to the control switching into a cooling mode.  In the case where a call for fan “G” already 
exists and either a “W” or a “Y” call is initiated, the blower speed will switch to the respective “W” or a 
“Y” speed following the blower on delay for that call. 
Six dip switches select Speed values for heat, cool, fan and dehumidification blower speeds (see the CFM 
Tables). 

 
Blower On and Off Delays 

Four Heat blower on and four blower off delays are selected by two dip switches for each function. Refer to 
Table 1 for specific delay values. 
 
Speed Selection values 

 

Three dip switches select 8 cooling speeds.  Dependant fan, and dehumidification speeds are selected by 
the same switches, 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 heating and cooling capacity parameters.  See the CFM Tables for speeds. 

 

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 respective SW1 dipswitch on the furnace’s 
integrated control board (see Figure 2). 
 
 
 
 
 

 
 
 

COOLING SPEEDS

HEATING SPEEDS & TEMPERATURE RISE

°F Rise

CFM

COOL

LOW

DEHUM

3-ON

6-OFF

2-OFF

5-OFF

560

1-OFF

4-OFF

3-ON

6-OFF

2-OFF

5-OFF

1-ON

4-ON

3-ON

6-OFF

2-ON

5-ON

840

1-OFF

4-OFF

3-ON

6-OFF

2-ON

5-ON

980

1-ON

4-ON

6-ON

5-OFF

1120

4-OFF

 Factory shipped

settings

1500

800

4

63

1500

84

70

1350

1125

77

1230

SW1 

switch 

settings

OL11

OL11

2

800

400

SW 1 

switch 

settings

Tons

CFM

3.5

700

2.5

1000

500

1400

700

3

1200

600

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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