Carrier N4H7T Installation Instructions Manual

Carrier N4H7T Installation Instructions Manual Manual pdf 1 page image

Installation InstructionsNOTE: Read the entire instruction manual before starting the installation.SAFETY CONSIDERATIONSImproper installation, adjustment, alteration, service, maintenance, oruse can cause explosion, fire, electrical shock, or other conditions whichmay cause death, personal injury, or property damage. Consult aqualified installer, service agency, or your distributor or branch forinformation or assistance. The qualified installer or agency must usefactory-authorized kits or accessories when modifying this product.Refer to the individual instructions packaged with the kits or accessorieswhen installing.Follow all safety codes. Wear safety glasses, protective clothing, andwork gloves. Use quenching cloth for brazing operations. Have fireextinguisher available. Read these instructions thoroughly and follow allwarnings or cautions included in literature and attached to the unit.Consult local building codes and current editions of the NationalElectrical Code (NEC) NFPA 70. In Canada, refer to current editions ofthe Canadian Electrical Code CSA 22.1.Recognize safety information. This is the safety-alert symbol Whenyou see this symbol on the unit and in instructions or manuals, be alert tothe potential for personal injury. Understand these signal words;DANGER, WARNING, and CAUTION. These words are used with thesafety-alert symbol. DANGER identifies the most serious hazardswhich will result in severe personal injury or death. WARNINGsignifies hazards which could result in personal injury or death.CAUTION is used to identify unsafe practices which would result inminor personal injury or product and property damage. NOTE is used tohighlight suggestions which will result in enhanced installation,reliability, or operation.Installation RecommendationsNOTE: In some cases noise in the living area has been traced to gaspulsations from improper installation of equipment.1. Locate unit away from windows, patios, decks, etc. where unitoperation sound may disturb customer.2. Ensure that vapor and liquid tube diameters are appropriate for unitcapacity.3. Run refrigerant tubes as directly as possible by avoidingunnecessary turns and bends.4. Leave some slack between structure and unit to absorb vibration.5. When passing refrigerant tubes through the wall, seal opening withRTV or other pliable silicon-based caulk. (See Fig. 1.)6. Avoid direct tubing contact with water pipes, duct work, floorjoists, wall studs, floors, and walls.7. Do not suspend refrigerant tubing from joists and studs with a rigidwire or strap which comes in direct contact with tubing.(See Fig. 1.)8. Ensure that tubing insulation is pliable and completely surroundsvapor tube.9. When necessary, use hanger straps which are 1 in. (25.4 mm) wideand conform to shape of tubing insulation. (See Fig. 1.)10. Isolate hanger straps from insulation by using metal sleeves bent toconform to shape of insulation.A07588Fig. 1 – Piping InstallationWhen outdoor unit is connected to factory-approved indoor unit, outdoorunit contains system refrigerant charge for operation with AHRI ratedindoor unit when connected by 15 ft. (4.57 m) of field-supplied orfactory accessory tubing. For proper unit operation, check refrigerantcharge using charging information located on control box cover and/orin the Check Charge section of this instruction.IMPORTANT: Maximum liquid-line size is 3/8-in. OD for allresidential applications including line line.IMPORTANT: Always install the factory-supplied liquid-line filterdrier. Obtain replacement filter driers from your distributor or branch.N4H7TSPLIT-SYSTEM 2-STAGE HEAT PUMPWITH R-410A REFRIGERANT2-5 TONSWARNING!ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injury or death.Before installing, modifying, or servicing system, main electricaldisconnect switch must be in the OFF position. There may be more than1 disconnect switch. Lock out and tag switch with a suitable warninglabel.WARNING!EXPLOSION HAZARDFailure to follow this warning could result indeath, serious personal injury, death, and/orproperty damage.Never use air or any gas containing oxygen forleak testing or operating refrigerantcompressors. Never allow compressor suctionpressure to operate in a vacuum with servicevalves closed. See Service Manual forpump-down instructions.