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General| Brand | Carrier |
|---|---|
| Model | NP034-074 |
| Category | Air Conditioner |
| Language | English |
Instructions for lifting and positioning the unit for installation.
Details on installing the accessory or field-fabricated roof curb.
Mounting considerations for units on various roofing materials.
Requirements for installing the unit on a concrete slab.
Clearance requirements for unit placement for airflow and service.
Guidance on connecting field-fabricated ductwork to the unit.
Details on selecting and installing condensate drain locations and piping.
Procedures for installing outdoor air hoods and flue hoods.
How to adjust manual outdoor-air dampers and economizer settings.
Instructions for routing field wiring for control and power.
Important considerations for making field electrical connections.
Steps to take before starting the unit, including checking installation.
Instructions for loosening and adjusting compressor hold-down bolts.
Procedures for removing evaporator-fan shipping brackets.
Verifying and tightening electrical connections within the control box.
Checking and ensuring refrigerant service valves are properly set.
Ensuring crankcase heaters are properly installed and energized.
Checking compressor oil levels and procedures for adding oil.
Checking gas manifold pressure against the valve body stamping.
Verifying that the power source voltage matches the unit nameplate.
Procedures for testing for refrigerant leaks and dehydrating the system.
Checking factory-installed belts, pulleys, and sheaves for proper condition.
Checking condenser fan rotation, location, and setscrews.
Ensuring correct return-air filters are installed and checking them.
Verifying economizer inlet screens are in place.
Checking economizer dampers are fully closed with no power.
Ensuring the 25% outdoor-air damper is set correctly.
Initial steps for starting the unit, including checking electrical connections.
Sequence of operation for cooling without an economizer.
Sequence of operation for heating without an economizer.
How to verify refrigerant charge using charging charts.
Operation sequence for cooling with an economizer.
Operation sequence for heating with an economizer.
How to operate the unit in continuous fan ventilation mode.
Operation with an automatic changeover thermostat for heating/cooling.
How the unit controls head pressure, including fan cycling.
Information on accessing unit components through hinged doors.
Access points for refrigerant service valves, filter driers, and sight glasses.
Accessing evaporator fan motors, pulleys, and belts.
Accessing power exhaust fan motors, pulleys, and belts.
Location and access to the unit control box.
Accessing the gas heat section and its components.
Inspection and adjustment of main and pilot burners.
Cleaning and inspecting the combustion air blower.
Instructions for cleaning condenser and evaporator coils.
Guidelines for replacing return-air filters based on operating conditions.
Procedure for cleaning economizer outdoor-air filters.
Factory oil charge and service manual reference.
Lubrication instructions for fan shaft bearings.
Lubrication for inlet guide vane bearings.
Note on sealed fan motor bearings.
Recommendation to lubricate door hinges.
How to adjust motor mounting plates for belt tension.
Location and access to the differential pressure switch.
Location and access for inlet guide vane pressure switch.
Guidelines for proper belt installation and tensioning.
Procedure to check and align motor and fan pulleys.
Steps for installing an alternate motor pulley for the evaporator fan.
Steps to adjust condenser fan height and tighten setscrew.
Adjustment procedure for the 25% outdoor-air damper.
Troubleshooting steps if pilot light does not ignite.
