This document outlines the assembly and maintenance of Hessaire Rooftop Evaporative Coolers, specifically models DX4800 and DX6800. These evaporative coolers are designed to provide cooling by drawing hot, dry air over water-saturated media pads, which cools the air through evaporation before it is circulated into a space.
Function Description:
The Hessaire Evaporative Coolers operate on the principle of evaporative cooling. Air is drawn into the unit by a motor-driven propeller. As the air passes through water-saturated media pads, water evaporates, absorbing heat from the air and lowering its temperature. The cooled air is then discharged into the environment. A pump circulates water from a reservoir (water pan) to the top of the media pads, ensuring continuous saturation. The units incorporate a water diverter and distribution tubes to ensure even water flow over the media pads. Bracing and a robust framework provide structural integrity.
Important Technical Specifications:
The manual provides detailed hardware lists and assembly steps for two models: DX4800 and DX6800. While specific performance metrics like CFM (Cubic Feet per Minute) or cooling capacity are not explicitly stated in this excerpt, the dimensions of the main box and media panel box are provided:
- DX4800:
- Main Box Dimensions: 32.5"x32.5"x12"
- Media Panel Box Dimensions: 26.5"x20.5"x11"
- DX6800:
- Main Box Dimensions: 37"x35.5"x13"
- Media Panel Box Dimensions: 30.5"x26"x12"
The assembly process involves various components, including:
- Hardware Packets: Containing screws, nuts, and other fasteners.
- Assembly Manual: Guides the user through the installation process.
- Owners Manual: Provides operational and maintenance instructions.
- Side Discharge Venturi: Directs airflow.
- Float Valve Assembly: Controls water level in the pan.
- Pump Hose: Connects the pump to the water distribution system.
- Corner Columns: Provide structural support for the framework.
- Water Tank (Water Pan): Holds the water for evaporation.
- Motor: Drives the propeller to move air.
- Propeller: The fan blade that moves air.
- Propeller Ring: Supports and protects the propeller.
- Junction Box: Houses electrical connections.
- Panel Cover: Covers the electrical components.
- Water Diverter & Distribution Tubes: Ensure even water flow over media pads.
- Diagonal Braces: Provide structural stability.
- Media Side Panels: The evaporative media through which air passes.
The hardware identification section details various screws (ST3.9X13, ST3.9X16, ST4.8X16, ST6.3X19, M6X14) used throughout the assembly, along with their dimensions and typical applications. Cable ties are also listed for securing wiring.
Usage Features:
The manual focuses on the assembly process, which implies that the units are designed for user assembly. The step-by-step instructions are detailed, with illustrations and specific screw types and quantities for each stage.
- Step 1: Attach Components To Bottom Water Pan: Involves installing the corner columns, pump, overflow tube, and drain plug into the water pan. This step highlights the importance of proper sealing for the overflow tube.
- Step 2: Attach Components To Underside Of Top: Focuses on installing the water diverter and pushing water distribution tubes onto hose barbs. This ensures the water is evenly distributed across the media pads.
- Step 3: Assemble Framework: Involves attaching the side discharge venturi, top lid, corner columns, and tank assembly using various screws. This step builds the main structure of the cooler.
- Step 4: Attach Motor Arm Brackets To Motor: Details the installation of motor arm brackets to the motor using M6X14 screws.
- Step 5A: Assemble Down Draft Position (Cabinet Assembly): Involves attaching the motor and motor bracket arms assembly, propeller, and cover panel to the cabinet. This step also includes important assembly notes regarding securing the motor, propeller, and cover panels.
- Step 5B: Assemble Side Draft Position (Cabinet Assembly): Similar to 5A, but for side draft configuration. It emphasizes attaching the cover panel and propeller, with notes on securing the venturi panel and ensuring proper airflow.
- Step 6: Attach Wiring Box / Connect Motor & Pump: Involves attaching the junction box to the top lid and connecting the motor and pump wires. This step includes instructions for securing wires with cable ties and connecting to a quick connector.
- Step 7: Attach Bracing, Pump Hose, Float Valve: Details the installation of diagonal braces, the pump hose, and the float valve. Specific instructions are given for the placement of braces and the proper fitting of the float valve.
- Step 8: Install Media Side Panels: Involves attaching the media pads to the unit. This step includes notes on lifting the panel up, pushing the bottom into place, and securing with screws.
Maintenance Features:
While the manual primarily covers assembly, the "Final Assembly Inspection Steps" section provides crucial checks that are also relevant for ongoing maintenance:
- Inspect For:
- All screws and motor bolts are securely tightened.
- All cords and hoses are secured out of the path of the propeller.
- All connectors are firmly snapped together.
- Pump is securely seated and fastened to the tank.
- Drain plug is in place.
- Media pad panels are properly installed.
These inspection points are essential for ensuring the safe and efficient operation of the evaporative cooler. Regular checks of these items would form part of a routine maintenance schedule. The presence of a drain plug also suggests that draining the water pan for cleaning or seasonal storage is a designed maintenance feature. The float valve assembly helps maintain the correct water level, reducing the need for constant manual refilling. The modular design, with removable panels and accessible components, likely facilitates easier cleaning and replacement of parts like media pads or the pump, though specific instructions for these tasks are not included in this excerpt.
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