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, make sure cooler cabinet is properly |
| grounded to a suitable ground connection. |
5. | Cooler must be connected to proper line current, voltage and |
motor mount using these carriage bolts and the washers and nuts provided (see Fig. 1). Make sure all bolts are securely tightened.
•Motor pulley. Install the motor pulley so that it aligns with the blower pulley (see Fig. 2) and tighten set screw. See page 3 for instructions on adjusting pulley.
Motor
Pulley
Blower Blower
Housing Pulley
Fig. 2
| cycle, as stamped on cooler motor and pump motor specification |
| plate. |
6. | Do not allow pump to tip over and become submerged. |
7. | Always TURN OFF POWER before performing any mainte- |
| nance. |
Operation
For the best cooling performance, if the pads are dry,
These coolers may also be used without water for ventilation purposes. When outside air is cool (for example, at night) or when humidity is high the water pump can be turned off.
Important: To cool efficiently, you must exhaust the 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. The air will flow in the direction of the exhaust openings. A common guide for the amount of exhaust opening needed is to have at least 2 square feet of opening per 1000 CFM.
Installation
CAUTION: Make sure that the mounting surface is strong enough to support the operating weight of the cooler when in use. (For operating weight, see the general specification table.)
CAUTION: Do not start cooler until installation is complete and unit has been tested for rigidity.
CAUTION: Make sure all bolts are securely tightened before starting the cooler.
•Wet sections. The wet sections are bolted to the blower section using the connector brackets, lift brackets and bolts provided. Match the colored dots on the wet section to the appropriate dot on the blower section to insure correct installation.
•Ductwork. See the General Specification table for dimensions of duct opening. For down discharge units, the duct must go inside the opening. Size these ducts slightly smaller than the duct opening in the cooler. The side and up discharge units have a 1 inch flange. Size these ducts larger than the duct opening to fit over the flange of these units.
Note: Curbs are not provided. The installer is responsible for providing curbs or other means to support the cooler.
Motor Installation
•Motor mounting. Slide the
heads of the provided carriage |
| |
bolts into the slots of the ad- |
| |
justable channels. Slide these |
| |
channels sideways in the slotted |
| |
holes to align with the holes in |
| |
the motor base and to align the | Fig. 1 | |
motor shaft with the blower | ||
| ||
pulley. Mount the motor to the |
|
Electrical Connection
NOTE: Local building code regulations must be observed.
WARNING: Disconnect all electrical services that are used for this unit before beginning any service to the cooler.
•Electrical supply. Cooler must be supplied with the proper line current, voltage and frequency, as stamped on blower motor and pump motor specification plate. See the wiring diagrams on page 4 for typical electrical connections. Note: Connecting improper voltage to motor will void motor warranty.
•Wire sizing. The conductor sizes are to be determined by motor loads and length of run per national and local electrical codes.
•Switches or contactors. Motors require switches or contactors of proper current capacity and should be sized and installed by a quali- fied electrician.
•Wiring. The electrical junction box
is located in the upper inside of the | Junction Box |
divider channel. Remove the two | Screws |
screws and pull the box out from the |
|
channel to access wiring (Fig. 3). |
|
Connect the pump supply wiring to |
|
the pump receptacles (See the pump |
|
wiring diagrams on the next page). | Fig. 3 |
Connect the motor supply wiring | |
directly to the blower motor. |
|
WARNING: Make sure that cooler cabinet is properly grounded to a suitable ground connection for maximum safety.
Water Connections
•Overflow assembly. Remove nut and place nipple through the hole in the pan, with the rubber washer between the pan and the head of
the drain nipple (Fig. 4). Screw on nut and draw up tight against bottom of pan. Insert overflow pipe in nipple to retain water. Overflow pipe may be removed to drain pan when necessary. A garden hose may be screwed on the drain nipple to drain water away from your unit.
•Pump. The pump must be secured to prevent it form tipping over. Secure the pump to the pump mounting bracket (item 16 in parts drawing). Remove a nut located under the head of the pump, place the pump bolt though the hole in the mounting bracket, and secure with the nut that was previously removed. Plug pump into receptacles. Retain pump cords to internal braces to prevent cords from dropping into water reservoirs or contacting moving components.
•Supply water. Run a water supply line to the unit. Each wet section requires a 3/8 inch tube connection to the float valve. The double inlet units will have two float valves, one for each wet section. Note:
Do not use water supplied from a water softener.
•Float valve. Refer to Fig. 5 to install float. Remove items 1, 2, 3, and 4. Insert float body (5) through hole in splash plate (9) and back post panel as shown. Install washer (1) and nut (2). Tighten to
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