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Wiring Diagram – Electric Heat and Blower 
 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

Summary of Contents for BCS2 Series

Page 1: ...formance 13 SEQUENCE OF OPERATION 13 AIR HANDLER MAINTENANCE 14 ASSISTANCE OR SERVICE 14 Accessories 14 WARRANTY 14 AIR HANDLER SAFETY Your safety and the safety of others are very important We have provided many important safety messages in this manual and on your appliance Always read and obey all safety messages This is the safety alert symbol This symbol alerts you to potential hazards that ca...

Page 2: ... suits the site conditions Consider required clearances space and routing requirements for refrigerant line condensate disposal filters ductwork wiring and accessibility for service Refer to the air handler rating plate on the air handler for specific information Tools and Parts Gather the required tools and parts before starting installation Read and follow the instructions provided with any tool...

Page 3: ...configuration changes before setting air handler in place See Installation Configuration Options Upflow air discharge only contains 1 drain pan Upflow or horizontal airflow contains 2 drain pans Vertical Installations Upflow The air handler must be supported on the bottom only and set on solid floor or field supplied supporting frame Securely attach the air handler to the floor or supporting frame...

Page 4: ...rizontal Right Requires drain pan location change A Drain connections Drain Pan Connections Horizontal Installations can be either Right or Left For horizontal right installations a drain pan location change is required Use drain connections A below Horizontal Right Requires drain pan location change For horizontal left installations use drain connections marked A below Horizontal Left Factory rea...

Page 5: ... removing 4 Move side drain pan to the opposite side 5 Install modified coil assembly back into air handler in the same orientation as before 6 Install the coil support bracket on the opposite side of the air handler NOTE For models 2 5 thru 5 ton the bracket attached to the top plate will need to be switched to the opposite side of the coil This is to prevent blowoff in the horizontal position wh...

Page 6: ...s air requirements and static pressure capabilities Ductwork should be insulated with a minimum of 1 thick insulation with a vapor barrier in conditioned areas or 2 minimum in unconditioned areas Supply plenum should be the same size as the flanged opening provided around the blower outlet and should extend ideally at least 3 ft from the air handler before turning or branching off plenum into duct...

Page 7: ...low complete drainage of the pan NOTE Horizontal runs must also have an anti siphon air vent standpipe installed ahead of the horizontal run See Typical Condensate Drain Connection An extremely long horizontal run may require an oversized drain line to eliminate air trapping Typical Condensate Drain Connection secondary drain not shown A Air handler D Anti siphon air vent B Drain connection E Drai...

Page 8: ... accordance with established procedures IMPORTANT Connecting refrigerant lines must be clean dehydrated refrigerant grade copper lines Air handler coils should be installed only with specific line sizes for approved system combinations Handle the refrigerant lines gently during installation process Sharp bends or possible kinking in the lines will cause a restriction Do not remove the caps from th...

Page 9: ... of circuits and ratings 2 Disconnect all power supplies 3 Knock out the correct number of knockouts 1 2 or 3 and install UL listed wires and fittings 4 Connect appropriate size wire to the circuit breaker terminals If circuit breakers are not provided a terminal block is provided 5 Connect green ground wire s 1 2 or 3 to ground terminal s 1 2 or 3 marked GND Connect to Circuit Breaker NOTE There ...

Page 10: ...cation Thermostat Air Handler Heating Only Application Thermostat Air Handler Condensing Unit Cooling Application with Electric Heat Thermostat Air Handler Heat Pump Connect common C wire only if required See Thermostat Installation Instructions Heat Pump Application with Electric Heat ...

Page 11: ...11 Wiring Diagram Electric Heat and Blower ...

Page 12: ...es for all sequencers to cycle on 2 Set the thermostat so it does not call for heat Allow up to 5 minutes for all sequencers to cycle off Check Airflow Cooling blower speed For proper cooling operation the airflow through the indoor coil should be between 350 and 450 CFM per ton of cooling capacity or 350 450 CFM per 12 000 BTU HR based on the rating of the outdoor unit The cooling blower speed is...

Page 13: ... switching it to the cooling position The reversing valve remains energized as long as selector switch is on the COOL position Heating electric heat only When the thermostat calls for heat the circuit between R and W is completed and the heater sequencer is energized A time delay follows before the heating elements and the indoor blower motor comes on Units with a second heat sequencer can be conn...

Page 14: ...ilter unless return air system is properly sized for it If water should start coming from secondary drain line a problem exists which should be investigated and corrected Contact a qualified person ASSISTANCE OR SERVICE If you need further assistance you may contact your local dealer Accessories To order accessories ask for the appropriate part number listed below or contact your local dealer Desc...

Page 15: ...ould contact a qualified local contractor or dealer and be prepared to provide the following information complete model and serial number and date of installation and an accurate description of the problem Limitation of Warranties The manufacturer makes no express warranties other than the warranties set forth above All implied warranties including the implied warranties of merchantability and fit...

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