HVAC / Evaporative Coolers
Champion Industrial/Commercial Evaporative Cooler Owner's Manual
Comprehensive owner's manual for Champion industrial and commercial evaporative coolers. Includes installation, electrical wiring, maintenance, troubleshooting, and parts diagrams for models 75/85, 95, 10/12, and 14/21.
Table of contents
Manual images
Click an image to enlargeQuick Guide from the Manual
This manual provides installation, operation, and maintenance instructions for Champion industrial and commercial evaporative coolers. Key procedures include ensuring the mounting surface can support the operating weight, proper electrical grounding, and regular maintenance such as oiling bearings and cleaning the pump. Always disconnect power before performing any maintenance.
Safety Rules
- Disconnect all electrical service before beginning installation.
- Electrical hookup must be performed by a qualified electrician in accordance with local standards.
- Ensure the cooler cabinet is properly grounded.
- Do not allow the pump to tip over or become submerged.
- Always disconnect power before installing or maintaining the unit.
Operation
For optimal cooling, pre-wet the pads by running the pump for a few minutes before starting the blower. The cooler can be used for ventilation without water when the air is cool or humidity is high. Efficient cooling requires exhausting stale air; ensure there is at least 2 square feet of exhaust opening per 1000 CFM.
Installation
Ductwork
Duct dimensions vary by model. For down discharge units (10/12DD, 14/21DD), the duct must go inside the opening. For side discharge units, ducts should fit over the 1-inch flange.
Water Connection
Install the overflow assembly by placing the nipple through the pan with a rubber washer. Secure the pump to the mounting bracket to prevent tipping. Connect a 3/8-inch water supply line to the float valve. Do not use water from a water softener.
Motor and Electrical
Mount the motor using the provided carriage bolts and adjustable channels. Align the motor shaft with the blower pulley. Electrical supply must match the voltage and frequency stamped on the motor plate. Motors require switches or contactors of proper current capacity.
Maintenance
Spring Start-Up
- Check and adjust belt tension.
- Oil blower bearings and motor (if equipped with oil lines) with non-detergent 20/30 weight oil once a year. Do not over-oil.
- Replace pads once or twice a season.
- Clean the pump and check for blockages.
Winter Shut Down
- Drain all water from the cooler and supply line.
- Disconnect the water line to prevent freezing.
- Disconnect from the power supply.
- Cover the unit to protect the finish.
Troubleshooting
Common issues include failure to start (check power, fuses, belt tension), inadequate cooling (check exhaust, pads, water flow), musty odors (clean pan and pads), and noisy operation (oil bearings, tighten loose parts).
Specifications
The manual includes detailed tables for motor specifications (HP, phase, speed, voltage, shaft size, belt, and sheave) and general cabinet dimensions/duct openings for all supported models (75/85, 95, 10/12, 14/21).
Manufacturer information
Champion Power Equipment
Practical help
Common problems
Failure to start or no air delivery
Check power supply, fuses, and circuit breakers. Ensure belt is not too loose or tight. Check for motor overheating or locked motor.
Inadequate cooling
Ensure adequate air exhaust. Check if pads are wet and clean. Verify water flow over pads and ensure pump is working.
Musty or unpleasant odor
Drain pan and clean pads. Check water distribution system for clogs.
Noisy operation
Oil bearings, inspect for loose parts, and ensure the blower wheel is not rubbing the housing.
Before use
- Disconnect all electrical service before installation.
- Ensure mounting surface is strong enough to support operating weight.
- Verify proper line current, voltage, and cycle match the motor plate.
- Ensure cooler cabinet is properly grounded.
- Pre-wet pads before starting the blower.
- Check that all bolts are securely tightened.
Specs in practice
- Operating Weight
- The total weight of the unit when filled with water, used to determine mounting surface requirements.
- Duct Opening
- The required dimensions for the ductwork connection to the cooler.
- Static Pressure
- Used in motor specification tables to select the correct motor sheave for proper airflow.
Images and diagrams
- Fig 1: Motor installation using adjustable channels.
- Fig 2: Pulley alignment between motor and blower.
- Fig 3: Water connection and overflow assembly components.
- Fig 4: Float valve installation.
- Fig 5: Pulley adjustment to control amperage.
Model compatibility
- Do not use water supplied from a water softener.
- Motors require switches or contactors of proper current capacity.
- Local building code regulations must be observed.
- Curbs are not provided; the installer is responsible for support.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.