Lennox LB-107318BU, Low Ambient Kit, For KHC180 & 240 Packaged Rooftop Units
Cat # : 23V27
Model/Part # : LB-107318BU
Quantity:
Product Overview
Lennox LB-107318BU, Low Ambient Kit, For KHC180 & 240 Packaged Rooftop Units
This kit allows low ambient operation to 0°F (-17.8°C) unless otherwise noted in product specifications.
When ambient temperature drops below 55°F (adjustable), S201 and S202 temperature switches open to de-energize K10 and K150 relay coils. Condenser fans 1, 2, 4 & 5 are de-energized. Liquid line pressure transducers A188 and A189 convert the pressure to an analog signal which is sent to the head pressure controls (A190, A191). The head pressure control provides a variable output which slows Condenser Fan 2 & 4 operation at lower ambient temperatures.
Includes:
- (2) Head pressure controls (A190, A191)
- Temperature switch bracket
- Wiring harness (1) - A190/191 24V power
- Wiring harness (2) - A190 to K254 power
- Wiring harness (3) - A191 to K255 power
- Wiring harness (4) - K58, K118 to S201, S201 power
- Wiring harness (5) - K58, K118 to CMC-0-OUT power
- Wiring harness (6) - A190-HP to CMC-FAN1, 2 power
- Bag assembly containing: (2) Pressure transducers (A188, A189) (2) Temperature switches (S201, S202) (10) Wire ties (4) Screws, #8-32 X 1/2 TFS (4)Screws, #8-32 X 1-1/4 TFS, Wiring diagram