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manual abstract
Step 1 — Provide Unit Support ...............1 II. Step 2 — Rig and Place Unit .................1 III. Step 3 — Field Fabricate Ductwork ............7 IV. Step 4 — Make Unit Duct Connections .........7 V. Step5—Trap Condensate Drain ..............7 VI. Step 6 — Make Electrical Connections .........8 VII. Step 7 — Make Outdoor-Air Inlet Adjustments ......................11 VIII. Step 8 — Install Outdoor-Air Hood ...........12 IX. Step 9 — Install All Accessories .............13 START-UP .................................... 15-20 SERVICE ..................................... 20-24 TROUBLESHOOTING ............................25 START-UP CHECKLIST .......................... CL-1 SAFETY CONSIDERATIONS Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment. Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply. Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguishers available for all brazing operations. WARNING: Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury. IMPORTANT: Units have high ambient operating limits. If limits are exceeded, the units will automatically lock the compressor out of operation. Manual reset will be required to restart the compressor. Cancels: II 559F-180-3 II 559F-180-4 10/15/98 INSTALLATION I. STEP 1 — PROVIDE UNIT SUPPORT A. Roof Curb Assemble and install accessory roof curb or horizontal adapter roof curb in accordance with instructions shipped with the curb or horizontal adapter. Accessory roof curb and horizontal adapter roof curb and information required to field fabricate a roof curb or horizontal adapter roof curb are shown in Fig. 1 and 2. Install insulation, cant strips, roofing, and counter flashing as shown. Ductwork can be secured to roof curb before unit is set in place. IMPORTANT: The gasketing of the unit to the roof curb or adapter roof curb is critical for a leak-proof seal. Install gasket supplied with the roof curb or adapter roof curb as shown in Fig. 1. Improperly applied gasket can result in air leaks and poor unit performance. Curb or adapter roof curb should be level. This is necessary to permit unit drain to function properly. Unit leveling tolerance is . 1.16 in. per linear ft in any direction. Refer to Accessory Roof Curb or Horizontal Adapter Roof Curb Installation Instructions for additional information as required. B. Alternate Unit Support When the curb or adapter cannot be used, support unit with sleepers using unit curb or adapter support area. If sleepers cannot be used, support long sides of unit with a minimum of 3 equally spaced 4-in. x 4-in. pads on each side. II. STEP 2 — RIG AND PLACE UNIT Inspect unit for transportation damage. File any claim with transportation agency. Keep unit upright, and do not drop. Use spreader bars over unit to prevent sling or cable damage. Rollers may be used to move unit across a roof. Level by using unit frame as a reference; leveling tolerance is . 1.16 in. per linear ft in any direction. See Fig. 3 for additional information. Unit weight is shown in Table 1. Four lifting holes are provided in ends of unit base rails as shown in Fig. 3. Refer to rigging instructions on unit. A. Positioning Provide clearance around and above unit for airflow, safety, and service access (Fig. 4 and 5). Do not install unit in an indoor location. Do not locate air inlets near exhaust vents or other sources of contaminated air. Although unit is weatherproof, guard against water from higher level runoff and overhangs. B. Roof Mount Check building codes for weight distribution requirements. NOTES: 1. Roof curb accessory is shipped disassembled. 2. Insulated panels: 1.2 . thick neoprene coated 2 lb density. PKG. NO. REF. CURBHEIGHTDESCRIPTION308450-20118-29(305) StandardCurb149High308450-20228-09(610) StandardCurbforUnitsRequiringHighInstallation308450-20328-09(610) SideSupplyandReturnKitforHighInstallation3. Dimensionsin( ) areinmillimeters. 4. Directionofairflow. 5. Roofcurb: 16ga. (VA03-56) stl. NOTE: Topreventthehazardofstagnantwaterbuild-upinthedrainpanoftheindoorsection, unitcanonlybepitchedasshown. UNITLEVELINGTOLERANCES* Dimensions(degreesandinches) UNITABDEG. IN. DEG. IN. 559F.28.45.28.43*Fromedgeofunittohorizontal. —2— Fig. 1 — Roof Curb Details NOTE: For preassembled horizontal adapter roof curb part no. 389210-201, the accessory kit includes a factory-designed, high- static, regain transition duct. For ...