Champion 12DD Owner's Manual

Industrial / Commercial Evaporative Cooler Manual

Models: 75/85 DD, 75/85 SD, 95 DD, 95 SD, 10/12 DD, 10/12 SD, 14/21 DD, 14/21 SD

Read Carefully All Of This Manual Before Installing The Unit.

Read And Save These Instructions.

Circle the model of your cooler and record the serial number below.

Serial #: _________________________

Safety Rules

1. Read instructions carefully.
2. Disconnect all electrical service that will be used for the unit before you begin the installation.
3. Electrical hook up should be done by a qualified electrician, so that all electrical wiring will conform to your local standards.
4. For maximum safety, ensure the cooler cabinet is properly grounded to a suitable ground connection.
5. Cooler must be connected to proper line current, voltage, and cycle, as stamped on the cooler motor and pump motor specification plate.
6. Do not allow the pump to tip over and become submerged.
7. Always DISCONNECT POWER before installing unit or performing any maintenance.

Operation

For best cooling performance, if pads are dry, pre-wet them by running the pump for a few minutes before starting the blower. These coolers can also be used without water for ventilation purposes. When outside air is cool (e.g., at night) or when humidity is high, the water pump can be turned off.

IMPORTANT: To cool efficiently, you must exhaust stale or used air from the building. Open windows or doors, or use exhaust fans located away from the cooler and in the direction you wish to cool the air. Air will flow towards the exhaust openings. A common guide is to have at least 2 square feet of exhaust opening per 1000 CFM.

Installation

CAUTION: Ensure the mounting surface is strong enough to support the operating weight of the cooler. (See Specification Table for operating weight.)

CAUTION: Never plug in the cooler until installation is complete and the unit has been tested for rigidity.

CAUTION: Ensure all bolts are securely tightened before starting the cooler.

Ductwork

Refer to the General Specification table for duct opening dimensions. For down discharge units (10/12DD and 14/21DD), the duct must fit inside the opening and be sized slightly smaller. For 75/85DD and 95DD models, the duct can go inside or outside the duct flange. Side discharge units have a 1-inch flange; size ducts larger than the opening to fit over the flange.

Note: Curbs are not provided. The installer is responsible for providing curbs or other means to support the cooler.

Motor Installation

1. Mount motor: Slide carriage bolt heads into the slots of the adjustable channels. Align channels with motor base holes and motor shaft with blower pulley. Mount the motor using provided carriage bolts, washers, and nuts (see Figure 1). Ensure all bolts are securely tightened.
2. Install pulley: Install the adjustable motor pulley to align with the blower drive pulley (see Figure 2) and tighten the set screw. Refer to page 3 for pulley adjustment instructions.

Figure 1: Diagram illustrating motor mounting with adjustable channels.

Figure 2: Diagram showing alignment of motor pulley and blower pulley.

Electrical Installation

NOTE: Local building code regulations must be observed.

WARNING: Disconnect all electrical service for this unit before installation.

• Electrical Supply: Cooler must be supplied with the proper line current, voltage, and frequency as stamped on the motor specification plate. Refer to wiring diagrams on page 4 for typical connections. Connecting improper voltage voids the motor warranty.
• Wire sizing: Conductor sizes must be determined by motor loads and run length per national and local electrical codes.
• Switches or contactors: Motors require switches or contactors of proper current capacity, sized and installed by a qualified electrician.

WARNING: Ensure the cooler cabinet is properly grounded for maximum safety.

Water Connection

• Overflow assembly: Remove nut, place nipple through the pan hole with the rubber washer between the pan and nipple head (see Figure 3). Screw on nut, tighten against the pan bottom. Insert overflow pipe into nipple to retain water. The overflow pipe can be removed to drain the pan. A garden hose can be attached to the drain nipple to drain water away from the unit.
• Pump: Secure the pump to prevent tipping. For 10/12 and 14/21 models, remove the pump's top mounting screw and use it to secure the pump to the mount. For 75/85 and 95 models, slide the pump into the mount slot and secure with the plastic retainer.

Figure 3: Diagram of the overflow assembly components (Overflow Pipe, Nipple, Rubber Washer, Bottom Pan, Nut).

Water Supply

Run a water supply line to the unit. The float valve requires a 3/8 inch tube connection. NOTE: Do not use water supplied from a water softener.

Float valve

Install the float valve to the mount bracket in the cooler (see Figure 4) and attach the water supply line. Note: 75/85 and 95 units have the float valve installed. For other models, the float valve is purchased separately.

Figure 4: Diagram of the float valve assembly (Mount Bracket, Float Rod, Water Supply Line, Nut, Ferrule, Nut, Washer).

Filling pan

Turn on the water supply and check for leaks. Allow water to fill to within 1 inch of the top of the pan. Loosen the screw on the float rod to adjust the float, then retighten the screw. Check for leaks.

Water troughs

Operate the pump until pads are saturated. Check each trough for even water dispersion. If uneven, loosen adjustment bolts and level the trough. Retighten bolts. Ensure all pads are saturated and have no dry spots or openings.

Bleed-Off

Using a bleed-off kit is recommended to prevent scale buildup by bleeding off small amounts of circulating water during operation. Do not add any type of water treatment chemicals to the water.

Pulley And Belt Adjustments

• Pulley adjustment: Use an ammeter to check motor amperage. Adjust the pulley until the amperage draw is just below the motor nameplate specification. To adjust, loosen the adjustment set screw and rotate the sheave. Tighten the set screw over a flat area to prevent thread damage. Increasing pulley diameter increases amperage; decreasing it decreases amperage (see Figure 5). Recheck belt alignment.
• CAUTION: When adjusting the pulley, check motor amperage to ensure it does not exceed the maximum allowed. Improper adjustment can overload and burn out the motor.
• Belt tension: Loosen motor mount bolts and slide the motor back until the belt is properly tensioned. A 3 lb force should deflect the belt 3/4 inches (see Figure 6). Retighten motor mount bolts. Do not adjust the pulley to tighten the belt.

Figure 5: Diagram illustrating pulley adjustment for amperage.

Figure 6: Diagram showing belt tension measurement (3 lb force, 3/4 inch deflection).

Maintenance

WARNING: Disconnect from power source before performing any maintenance.

Spring Start-Up

• Belt tension: Check belt tension and readjust if needed.
• Oil bearings: Oil blower and motor bearings annually with a few drops of non-detergent 20/30 weight oil. Motors without oil lines are lifetime lubricated. CAUTION: Do not over oil; excessive oil can damage motor windings.
• Change Pads: Replace pads once or twice per season for optimal absorbency and efficiency.
• Clean pump: Clean the pump annually. Disconnect power, unplug the pump, remove it from the bracket, and clean the pump and impeller. Check for blockages. Reinstall the pump securely.
• Bleed off: Check the bleed-off valve for clogs.

Winter Shut Down

• Drain water: Drain all water from the cooler and water supply line when not in use for prolonged periods or at the end of the season. Keep the water line disconnected to prevent freezing.
• Disconnect from power supply: Disconnect the unit when not in use for extended periods.
• Cover unit: Use a cover to protect the finish during extended periods of non-use.

Following these suggestions will ensure many years of efficient service. Contact your dealer for further assistance.

Troubleshooting Guide

Limited Warranty

This warranty extends to the original purchaser of an evaporative cooler installed and used under normal conditions. It does not cover damages incurred through accident, neglect, or abuse by the owner. No person or representative is authorized to assume any other liability.

Terms And Conditions Of Warranty

• For Five Years from date of purchase, the base assembly will be replaced if water leakage occurs due to rust out.
• For One Year from date of purchase, any original cabinet component failing due to material or factory workmanship defect will be replaced.

Exclusions From The Warranty

Cooler pads are disposable and not covered. Incidental or consequential damages from malfunction are not covered. Damage from water softeners, chemicals, plastic wrap, or using a motor with higher horsepower than specified is not covered. Service call costs for diagnosis or labor for repair/replacement are not covered.

How To Obtain Service Under This Warranty

Contact the Dealer where the cooler was purchased. If unsatisfied with the dealer's response, contact the Customer Service Department: 5800 Murray Street, Little Rock, Arkansas 72209. Phone: 1-800-643-8341. Email: info@championcooler.com. Website: www.championcooler.com.

This limited warranty applies only to the original purchaser.

Parts Lists and Diagrams

Refer to the following pages for detailed parts lists and diagrams:

• Parts Drawing (Dibujo de Piezas) - 10/12SD, 14/21SD (Page 7)
• Parts Drawing (Dibujo de Piezas) - 10/12DD, 14/21DD (Page 8)
• Parts List (Lista de Piezas) - 10/12, 14/21 (Page 9)
• Parts List (Lista de Piezas) - 75/85, 95 (Page 10)
• Parts Drawing (Dibujo de Piezas) - 75/85DD, 95DD (Page 11)
• Parts Drawing (Dibujo de Piezas) - 75/85SD, 95SD (Page 12)

Diagram Description: Exploded view diagrams showing the assembly of various Champion evaporative cooler models, illustrating the placement and identification of individual parts with corresponding numbers.

Motor Specifications

Detailed motor specifications, including HP, Phase, Speed, Volts, Shaft size, Drive Belt, and Motor Sheave, are provided in tables for different models:

• Motor Specifications (Especificaciones del Motor) - 75/85DD, 95DD (Page 11)
• Motor Specifications (Especificaciones del Motor) - 75/85SD, 95SD (Page 12)
• Motor Specifications (Especificaciones del Motor) - 10/12, 14/21 (Page 13)

General Specifications

General specifications including weight, cabinet dimensions, and duct opening sizes are provided in a table:

• General Specifications (Especificaciones Generales) (Page 13)

Spanish Instructions

Instructions and safety rules are also available in Spanish on pages 13-16.