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General| Brand | Lennox |
|---|---|
| Model | CHA16-024 |
| Category | Air Conditioner |
| Language | English |
Overview of CHA/CHP16 and CHP20 series units for commercial applications.
Warnings about installation, adjustment, alteration, service, or maintenance.
Technical specifications for CHA16 models.
Technical specifications for CHP16 models.
Technical specifications for CHP20 models.
List of optional accessories for CHA/CHP16 units.
List of optional accessories for CHP20 units.
Electrical data for CHA16 units across various configurations.
Electrical data for CHP16 units across various configurations.
Electrical data for CHP20 units across various configurations.
Blower performance data for CHA16 units at various speeds and pressures.
Blower performance data for CHP16/20 units at various speeds and pressures.
Visual layout of major components within the unit.
Diagram and list of components within the unit's control box.
Detailed description of components within the control box.
Descriptions of Transformer T1, Contactor K1, Relay K3, and Relay K4.
Descriptions of Start Capacitor C7, Dual Capacitor C12, Fan Relay K10, Latch Relay K6, Transfer Relay K8, Potential Relay K31.
Solid state control for automatic switching between heating and defrost modes.
Details on timing pins, jumper, and terminal functions for defrost control.
Description of reciprocating compressors and their protection features.
Diagram showing cooling components for specific models.
Diagram showing cooling components for specific models.
Detailed explanation of scroll compressor design, operation, and properties.
Descriptions of coils, freezestat switch, and high pressure switch.
Description of the valve that reverses refrigerant flow.
Descriptions of drier, defrost thermostat/switch, and low ambient controls.
Information on condenser fan and indoor blower motors and capacitors.
Tables showing ECH16 electric heat matchups and electrical ratings.
Description of electric heating elements and sequencing controls.
Functions of K15, K16, K17 relays, K15 contactor, R6 resistor, and K43 relay.
Description of thermal relays, fuses, and primary/secondary high temperature limits.
Description of heating elements and the time delay relay.
Ensure unit is installed per instructions and codes, using RMF16 if needed.
Information on unit and thermostat field wiring connections.
Details on power supply connections, voltage, and wiring.
Energizing heaters and performing pre-start checks for safety and functionality.
Attaching gauges and starting the unit in cooling mode.
Ensuring correct three-phase compressor rotation and system charging.
Steps for checking heating system operation in heat pump and electric heat modes.
How the blower operates and how to measure static pressure.
How to adjust blower speed by changing motor taps.
Guidelines for motor lubrication, filter maintenance, and condenser coil cleaning.
Checks for wiring, voltage, and amp-draw of motors.
Information on mounting frames and economizer types.
How economizers operate and adjust using enthalpy control.
Adjusting the setpoint for enthalpy control to manage outdoor air intake.
Details on minimum positioner, enthalpy sensor, and mixed air sensor.
Information on Night Relay, Warm Up Kit, Coil Guard, Filter Kit, Timed-Off Control, Compressor Monitor.
Details on Low Ambient Kit, its adjustment, and related power/transition kits.
Optional diffusers and the filter switch kit.
Wiring diagram for P voltage units.
Step-by-step explanation of cooling, heating, and defrost operation sequences.
Wiring diagram for Y voltage units.
Wiring diagram for G voltage units.
Operation sequence for Y and G voltage units.
Operation sequence for P voltage units.
Sequence of operation for 5kW P voltage electric heat units.
Sequence of operation for 7/10kW P voltage electric heat units.
Sequence of operation for 15/25kW P voltage electric heat units.
Sequence of operation for 5/15kW Y voltage electric heat units.
Sequence of operation for 20/25kW Y voltage electric heat units.
Sequence of operations for thermostats with economizers.
Operation sequences for enthalpy low/high, 1st/2nd stage cooling.
