AAON LL-540 User Manual
Ll series, Installation, operation & maintenance, Chillers and outdoor mechanical rooms

LL Series
Chillers and Outdoor Mechanical Rooms
Installation, Operation
& Maintenance
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings
exactly could result in serious injury,
death or property damage.
Be sure to read and understand the
installation, operation and service
instructions in this manual.
Improper
installation,
adjustment,
alteration, service or maintenance
can cause serious injury, death or
property damage.
A copy of this IOM should be kept
with the unit.
Do not store gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electrical switch;
do not use any phone in your
building.
Leave the building immediately.
Immediately call you gas supplier
from a phone remote from the
building. Follow the gas supplier’s
instructions.
If you cannot reach your gas
supplier call the fire department.
Startup
and
service
must
be
performed by a Factory Trained
Service Technician.
WARNING
WARNING
Document Outline
- Safety
- LL Series Feature String Nomenclature
- General Information
- Codes and Ordinances
- Receiving Unit
- Storage
- Outdoor Mechanical Room
- Wiring Diagrams
- General Maintenance
- Chiller Primary Pumping
- Chiller Primary/Secondary Pumping
- Boiler System
- Boiler Primary/Secondary Pumping
- Make Up Water
- Compression/Expansion Tank
- Pressure Relief Valve
- Automatic Air Vent
- Dual Pumps
- Pressure Gauges and Thermometers
- Pipe Insulation
- Installation
- Startup
- Axial Flow Condenser Fans
- General
- Compressors
- Refrigerant Filter Driers
- Evaporator/Heat Exchangers
- Adjusting Refrigerant Charge
- Lubrication
- Air-Cooled Condenser
- E-Coated Coil Cleaning
- Evaporative-Cooled Condenser
- Severe Service
- Safety
- Performance
- Warranties
- Condenser Tube Inspection
- Freeze Protection
- Recirculating Water System
- Startup
- Cleanliness
- Storage
- Pump Operation
- Running
- Condenser Fan Motors
- Water Make Up Valve
- Water Treatment System
- Sequence of Operation for LL Series units without Diagnostics
- Sequence of Operation for LL Series units with Diagnostics
- Pump Maintenance
- Fan Motor Maintenance
- Access Doors
- Bearings - Lubrication
- Recommended Monthly Inspection
- Mist Eliminators
- Air Inlet
- Stainless Steel Base Pan
- Propeller Fans and Motors
- Recommended Annual Inspection
- Cleaning
- Water Quality
- Mechanical Cleaning
- Service
- Replacement Parts
- AAON Warranty, Service and Parts Department
- Appendix - Water Piping Component Information
- Water Pressure Reducing Valve
- Water Pressure Relief Valve
- Automatic Air Vent Valves
- Pumps - Installation and Operating Instructions
- Pump Piping - General
- Pump Operation
- General Care
- Dual Pump Specific Information
- Horizontal and Vertical Expansion Tanks
- Suction Guides
- Glycol Auto Fill Unit
- Flo-Trex Combination Valve
- LL Series Startup Form
- Maintenance Log
- Literature Change History