Wiring Diagrams Electrical Wiring Diagrams - Lennox ROOFTOP FLEXY FCA Series Installation Operating & Maintenance Manual

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The power cable should be connected to the main isolating
switch and is fed from the underside of the unit into the
electrical panel.
Refer to the general arrangement drawings in the
documentation to locate the exact entry position.
The power cable sizes must be calculated with reference to
the electrical characteristics of your machine.
We are unable to state the cross sectional area of the cable
as it is directly related to the type of cable you are using, the
distance separating the equipment from the source but also
various factors relating to the cable fitting.
Items
Supply/ Transformers .......................................................................................................................................................... 64
Full fresh air damper activator ............................................................................................................. 07 ......................... 68
Economizer damper activator ............................................................................................................. 05 ......................... 67
Exhaust damper activator .................................................................................................................... 06 ......................... 67
Gas burner ............................................................................................................................ 4.1
Supply ........................................................................................................................................................................... 64
Control ......................................................................................................................................................................... 67/69
Internal wiring .............................................................................................................................................................. 70/71
Electrical coil ....................................................................................................................................... 02
Power wiring .................................................................................................................................................................. 64
Control ........................................................................................................................................................................... 67
Thermal safety .............................................................................................................................................................. 68
Water coil ............................................................................................................................................ 03
3-way valve ................................................................................................................................................................... 67
Antifreeze thermostat .................................................................................................................................................... 68
Supply fans .......................................................................................................................................................................... 64
Condensing fans/ Exhaust .................................................................................................................................................. 65
Exhaust roofcurb ................................................................................................................................ 06
Supply ........................................................................................................................................................................... 64
Motors safety ................................................................................................................................................................. 68
Compressors
Compressors ................................................................................................................................................................. 65
Crankcase heaters ........................................................................................................................................................ 65
Reversing valve .................................................................................................................................. 01 ......................... 68
Air sock ............................................................................................................................................... 14 ......................... 64
FX drain pan electric heater ................................................................................................................................................ 65
Displays
KP02 maintenance ........................................................................................................................ 11 .......................... 66
KP17 comfort ................................................................................................................................ 12 .......................... 66
Sensors
Room temperature ...................................................................................................................... BT10 ........................ 67
Outdoor temperature ................................................................................................................... BT11 ........................ 67
Water coil temperature ............................................................................................................... BT13 ........................ 67
Room humidity ............................................................................................................................ BH10 ....................... 67
Outdoor humidity ......................................................................................................................... BH11 ........................ 67
IAQ sensor ................................................................................................................................... 13 ......................... 67
Compressor pressure sensor .............................................................................................................................................. 67
Firestat ................................................................................................................................................ 08 ....................... 68/69
Smoke detector .................................................................................................................................. 09
CLIMATIC ™ Connexion .......................................................................................................................................... 67/68/69
Smoke detector wiring .................................................................................................................................................. 72
BMS contacts kit .................................................................................................................................................................. 72
In the following pages you will find references to electrical
diagrams which will allow you to select the wiring for your
equipment.
As the diagrams are valid for the entire range, they will refer
to items not included in your scope of supply.
Mark
4.2
IOM / ROOF-TOP FLEXY™ Series - Page 63
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