York THGD Series Installation Manual

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York THGD Series Installation Manual Manual pdf 3 page image

835961-UIM-D-0213Johnson Controls Unitary Products 3GROUND INSTALLATIONThe unit may be installed at ground level on a solid base that will notshift or settle, causing strain on the refrigerant lines and possible leaks.Maintain the clearances shown in Figure 1 and install the unit in a levelposition.Normal operating sound levels may be objectionable if the unit is placeddirectly under windows of certain rooms (bedrooms, study, etc.).Condensate will drain from beneath the coil of the outdoor unit duringthe defrost cycle. Normally this condensate may be allowed to draindirectly on the ground.Elevate the unit sufficiently to prevent any blockage of the air entrancesby snow in areas where there will be snow accumulation. Check thelocal weather bureau for the expected snow accumulation in your area.Isolate the unit from rain gutters to avoid any possible wash out of thefoundation.ROOF INSTALLATIONWhen installing units on a roof, the structure must be capable of sup-porting the total weight of the unit, including a pad, lintels, rails, etc.,which should be used to minimize the transmission of sound or vibra-tion into the conditioned space.UNIT PLACEMENT1. Provide a base in the pre-determined location.2. Remove the shipping carton and inspect for possible damage.3. Compressor tie-down bolts should remain tightened.4. Position the unit on the base provided.LIQUID LINE FILTER-DRIERThe heat pumps have a solid core bi-flow filter/drier located on the liquidline.*As listed on the “Energy Guide yellow sticker on the unit.PIPING CONNECTIONSThe outdoor unit must be connected to the indoor coil using field sup-plied refrigerant grade copper tubing that is internally clean and dry.Units should be installed only with the tubing sizes for approved systemcombinations as specified in Tabular Data Sheet. The charge given isapplicable for total tubing lengths up to 15 feet. See Application DataPart Number 247077 for installing tubing of longer lengths and elevationdifferences.PRECAUTIONS DURING LINE INSTALLATION1. Install the lines with as few bends as possible. Care must be takennot to damage the couplings or kink the tubing. Use clean harddrawn copper tubing where no appreciable amount of bendingaround obstruction is necessary. If soft copper must be used, caremust be taken to avoid sharp bends which may cause a restriction.2. The lines should be installed so that they will not obstruct serviceaccess to the coil, air handling system, or filter.3. Care must also be taken to isolate the refrigerant lines to minimizenoise transmission from the equipment to the structure.4. The vapor line must be insulated with a minimum of 1/2" foam rubberinsulation (Armaflex or equivalent). Liquid lines that will be exposedto direct sunlight and/or high temperatures must also be insulated.5. Tape and suspend the refrigerant lines as shown. DO NOT allowtube metal-to-metal contact. See Figure 2.6. Use PVC piping as a conduit for all underground installations asshown in Figure 3. Buried lines should be kept as short as possibleto minimize the build up of liquid refrigerant in the vapor line duringlong periods of shutdown.7. Pack fiberglass insulation and a sealing material such as permagumaround refrigerant lines where they penetrate a wall to reduce vibra-tion and to retain some flexibility.8. See Form 247077 for additional piping information.The outdoor unit should not be installed in an area where mud or icecould cause personal injury. Remember that condensate will drip fromthe unit coil during heat and defrost cycles and that this condensatewill freeze when the temperature of the outdoor air is below 32°F.Heat pumps will defrost periodically resulting in water drainage. Theunit should not be located where water drainage may freeze and cre-ate a hazardous condition - such as sidewalks and steps.Replacements for the liquid line drier must be exactly the same asmarked on the original factory drier. See Source 1 for O.E.M. replace-ment driers.Failure to do so or using a substitute drier or a granular type mayresult in damage to the equipment.Filter-DrierSource 1 Part No. Apply with ModelsS1-52636219000 AllNOTICENOTICEUsing a larger than specified line size could result in oil return prob-lems. Using too small a line will result in loss of capacity and otherproblems caused by insufficient refrigerant flow. Slope horizontalvapor lines at least 1" every 20 feet toward the outdoor unit to facili-tate proper oil return.FIGURE 2: Tubing HangerFIGURE 3: Underground InstallationNOTICELiquidLineIncorrectCorrect TapeSheet Metal HangerInsulated Vapor LineTO INDOOR COIL TO OUTDOOR UNITLIQUID LINECAPPVCCONDUITINSULATEDVAPOR LINE