Carrier AQUAZONE 50HQL072-120 Installation, Start-up And Service Instructions Manual

Carrier AQUAZONE 50HQL072-120 Installation, Start-up And Service Instructions Manual Manual pdf 10 page image

10PROTECTION — Once the units are properly positioned onthe jobsite, they must be covered with either a shipping carton,vinyl film, or an equivalent protective covering. Open ends ofpipes stored on the jobsite must be capped. This precaution isespecially important in areas where painting, plastering, orspraying of fireproof material, etc. is not yet complete. Foreignmaterial that is allowed to accumulate within the units can pre-vent proper start-up and necessitate costly clean-up operations.Before installing any of the system components, be sure toexamine each pipe, fitting, and valve, and remove any dirt orforeign material found in or on these components.INSPECT UNIT — To prepare the unit for installation, com-plete the procedures listed below:1. Compare the electrical data on the unit nameplate withordering and shipping information to verify that thecorrect unit has been shipped.2. Do not remove the packaging until the unit is ready forinstallation.3. Verify that the unit’s refrigerant tubing is free of kinks ordents, and that it does not touch other unit components.4. Inspect all electrical connections. Be sure connections areclean and tight at their terminations.5. Loosen compressor bolts until the compressor rides freelyon springs. Remove shipping restraints.6. Remove the four 1/4 in. shipping bolts from compressorsupport plate (two bolts on each side) to maximize vibra-tion and sound alternation.7. Remove any blower support cardboard from inlet of theblower.8. Locate and verify any accessory kit located in compressorand/or blower section.9. Remove any access panel screws that may be difficult toremove once unit is installed.Step 3 — Location of Unit — The following guide-lines should be considered when choosing a location for aWSHP:• Units are for indoor use only.• Locate in areas where ambient temperatures are between40 F and 100 F and relative humidity is no greater than75%.• Provide sufficient space for water, electrical and ductconnections.• Locate unit in an area that allows for easy access andremoval of filter and access panels.• Allow enough space for service personnel to performmaintenance.• Provisions must be made for return air to freely enter thespace if unit needs to be installed in a confined area suchas a closet.NOTE: Correct placement of the horizontal unit can play animportant part in minimizing sound problems. Since duct-work is normally applied to these units, the unit can be placedso that the principal sound emission is outside the occupiedspace in sound-critical applications. A fire damper may be re-quired by the local code if a fire wall is penetrated.Step 4 — Mounting the UnitHORIZONTAL UNITS (50HQL) — Horizontal units shouldbe mounted using the factory-installed hangers. Proper attach-ment of hanging rods to building structure is critical for safety.See Fig. 2. Rod attachments must be able to support the weightof the unit. See Table 1 for unit operating weights.VERTICAL UNITS (50VQL) — Vertical units are available inrear or front return air configurations.Sound minimization is achieved by enclosing the unit with-in a small mechanical room or a closet. Additional measuresfor sound control include the following:1. Mount the unit so that the return air inlet is 90 degrees tothe return air grille. Install a sound baffle to reduce line-of-sight sound transmitted through return air grilles.2. Mount the unit on a rubber or neoprene pad to minimizevibration transmission to the building structure. Extendthe pad beyond all four edges of the unit.NOTE: Some codes require the use of a secondary drain panunder vertical units. Check local codes for more information.Step 5 — Duct System — The duct system should besized to handle the design airflow quietly.NOTE: Depending on the unit, the fan wheel may have a ship-ping support installed at the factory. This must be removedbefore operating unit.SOUND ATTENUATION — To eliminate the transfer ofvibration to the duct system, a flexible connector is recom-mended for both discharge and return air duct connections onmetal duct systems. The supply and return plenums should in-clude internal duct liner of fiberglass or be made of duct boardconstruction to maximize sound attenuation of the blower.Installing the WSHP unit to uninsulated ductwork in an uncon-ditioned space is not recommended since it will sweat andadversely affect the unit’s performance.To reduce air noise, at least one 90-degree elbow could beincluded in the supply and return air ducts, provided systemperformance is not adversely impacted. The blower speed canbe also changed in the field to reduce air noise or excessive air-flow, provided system performance is not adversely impacted.EXISTING DUCT SYSTEM — If the unit is connected toexisting ductwork, consider the following:• Verify that the existing ducts have the proper capacity tohandle the unit airflow. If the ductwork is too small,larger ductwork should be installed.• Check existing ductwork for leaks and repair asnecessary.NOTE: Local codes may require ventilation air to enter thespace for proper indoor air quality. Hard-duct ventilation maybe required for the ventilating air supply. If hard ducted venti-lation is not required, be sure that a proper air path is providedfor ventilation air to unit to meet ventilation requirement of thespace.DO NOT store or install units in corrosive environments orin locations subject to temperature or humidity extremes(e.g., attics, garages, rooftops, etc.). Corrosive conditionsand high temperature or humidity can significantly reduceperformance, reliability, and service life. Always moveunits in an upright position. Tilting units on their sides maycause equipment damage.Failure to remove shipping brackets from spring-mountedcompressors will cause excessive noise and could causecomponent failure due to added vibration.