York YAZS022 Installation Manual

York YAZS022 Installation Manual Manual pdf 5 page image

5Installing and servicing heating and air conditioning equipment canbe hazardous due to system pressure and electrical components.Only trained and qualified service personnel should install, repair orservice heating and air conditioning equipment. Untrained personnelcan perform the basic maintenance functions of cleaning coilsand cleaning and replacing filters. All other operations should beperformed by trained service personnel. When working on heatingand air conditioning equipment, observe precautions in the literature,tags and labels attached to the unit and other safety precautions thatmay apply, such as the following safety measures:• Follow all safety codes.• Wear safety glasses and work gloves.• Use a quenching cloth for brazing operations.• Have a fire extinguisher available for all brazing operations.Moving and StorageMove units in the normal “up” orientation. Units may be moved andstored per the information on the packaging. Do not stack morethan three units in total height. Do not attempt to move units whilestacked. When the equipment is received, all items should becarefully checked against the bill of lading to be sure all crates andcartons have been received. Examine units for shipping damage,removing the units from the packaging if necessary. Units inquestion should also be internally inspected. If any damage is noted,the carrier should make the proper notation on the delivery receipt,acknowledging the damage.Unit LocationNOTE: Prior to setting the unit in place, remove and discard thecompressor shipping bolt located at the front of the compressormounting bracket.Locate the unit in an indoor area that allows for easy removal ofthe access panels. Location should have enough space for servicepersonnel to perform maintenance or repair. Provide sufficient roomto make water, electrical and refrigerant line connections. Anyaccess panel screws that would be difficult to remove after the unitis installed should be removed prior to setting the unit. Care shouldbe taken when units are located in unconditioned spaces to preventdamage from frozen water lines and excessive heat that coulddamage electrical components.Air Coil LocationRefer to the air handler manufacturer’s instructions for the blower coilunit for details on installing the air handling portion of the system.Condensate DrainFollow the blower coil manufacturer’s instructions.WARNING: Before performing service or maintenanceoperations on a system, turn off main power switchesto the indoor unit. If applicable, turn off the accessoryheater power switch. Electrical shock could causepersonal injury.Safety Considerations Duct SystemAll blower coil units/air coils must be installed as specified by themanufacturer’s installation instructions; however, the followingrecommendations should be considered to minimize noise andservice problems.An air filter must always be installed upstream of the air coil onthe return air side of the air handler or furnace. If there is limitedaccess to the filter rack for normal maintenance, it is suggestedthat a return air filter grill be installed. Be sure that the return ductis properly installed and free of leaks to prevent dirt and debrisfrom bypassing the filter and plugging the air coil.In applications using galvanized metal ductwork, a flexible ductconnector is recommended on both the supply and return airplenums to minimize vibration from the blower. To maximize soundattenuation of the unit blower, the supply and return plenumsshould include an internal duct liner of 1-inch thick glass fiber orbe constructed of ductboard. Insulation is usually not installed inthe supply branch ducts. Ducts in unconditioned areas should bewrapped with a minimum of 1-inch duct insulation. Application ofthe unit to uninsulated ductwork in an unconditioned space is notrecommended as the unit’s performance will be adversely affected.If the air handler is connected to existing ductwork, a previouscheck should have been made to assure that the duct system hasthe capacity to handle the air required for the unit application. Ifducting is too small, as in replacement of heating only systems,larger ductwork should be installed. All existing ductwork should bechecked for leaks and repairs made accordingly. The duct systemsand diffusers should be sized to handle the design airflow quietly.If air noise or excessive airflow is a problem, the blower speed canbe changed to a lower speed to reduce airflow. This will reduce theperformance of the unit slightly in heating; however, it will increasethe temperature rise across the air coil. Airflow must still meetminimum requirements.Equipment SelectionThe following guidelines should be used when mating a indoor splitto an air handler/coil.• Select R-410A components only.• Select 13 SEER or higher air handler/coil.• Match the air handler to the air handler coil data table.• Indoor matching adjustable TXV should be used with any airhandler/coil. Fixed orifice or cap tube systems should not be used.Utilizing Existing Coil or Air HandlerIt is recommended that a new R-410A air handler be installed with aindoor split considering the long term benefits of reliability, warranty,etc. versus the short term installation cost savings. However, theexisting air handler may be retained provided the following:• Coil currently is R-410A rated• Coil uses a TXV. No capillary or fixed orifice systems shouldbe used• A life expectancy of more than 7 years remaining for the airhandler and components• Flush air coil and line setGeneral Installation InformationAFFINITY INDOOR SPLIT SERIES INSTALLATION MANUAL