Nortek Y1SA Installation Instructions Manual Download Page 1 | Manualshive

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InstallatIon InstructIons

IMPortant

attEntIon InstallErs:

It is your responsibility to know this product better than your customer. this includes being
able to install the product according to strict safety guidelines and instructing the customer on
how to operate and maintain the equipment for the life of the product. safety should always be
the deciding factor when installing this product and using common sense plays an important
role as well. Pay attention to all safety warnings and any other special notes highlighted in the
manual. Improper installation of this unit or failure to follow safety warnings could result in
serious injury, death, or property damage.
these instructions are primarily intended to assist qualified individuals experienced in the proper
installation of this appliance. some local codes require licensed installation/service personnel
for this type of equipment. Please read all instructions carefully before starting the installation.
return these instructions to the customer’s package for future reference.

Do not DEstroY. PlEasE rEaD carEFullY & KEEP In a saFE PlacE For FuturE rEFErEncE.

GEothErMal hEat PuMP coMPrEssor sYstEM
60 hz

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Summary of Contents for Y1SA

Page 1: ...ty warnings and any other special notes highlighted in the manual Improper installation of this unit or failure to follow safety warnings could result in serious injury death or property damage Theseinstructionsareprimarilyintendedtoassistqualifiedindividualsexperiencedintheproper installation of this appliance Some local codes require licensed installation service personnel for this type of equip...

Page 2: ...R 410A Charging Procedure 10 Initial Charge 10 Starting In Heating Mode Charging To Sight Glass 10 System Check 11 Air Circulation Indoor Blower 11 System Heating 11 OperatinG Sequence 11 Cooling 11 Heating 11 Unit MAINTENANCE 12 Filter Drier 12 Replacing the Oil Separator Filter 12 Adding Compressor Oil 12 Troubleshooting 13 Two Digit Display 13 Loss Of Capacity 14 Restricted Refrigerant System 1...

Page 3: ...akeitnecessaryfor evacuationandcharging itshouldonlybeattempted by qualified trained personnel thoroughly familiar with this equipment Some local codes require licensed installation service personnel to service this type of equipment Under no circumstances should the equipment owner attempt to install and or service this equipment Failure to comply with this warning could result in equipment damag...

Page 4: ...d requirement Load estimates can be made using approved methods available from Air Conditioning Contractors of America ManualJ AmericanSocietyofHeating Refrigerating and Air Conditioning Engineers or other approved engineering methods Thisunitisdesignedforindoorandoutdoorinstallationsand shouldbelocatedwithconsiderationgiventotheaccessibility of fuel electric power service access noise shade and d...

Page 5: ...sor section is equipped with components and control logics described in the following sections Heating To Cooling Transition The compressor section includes a hot gas injection valve to ensure smooth transition from heating to cooling mode operations See Figure 6 page 16 After heating mode operation the earth loop temperature maybebelowthenormalundergroundtemperature around 58 F As the refrigerant...

Page 6: ...ler Insulating Interior Line Sets Insulate all interior refrigerant lines and their connections The compressor section contains the expansion valve and the liquid line is more likely to sweat as it condenses moisture from the interior air Use at least a 3 4 inch wall closed cell insulation that is non corrosive to copper to insulate all refrigerant lines Use Armaflex Neoprene or Rubatex having at ...

Page 7: ...rature rather than operating on a preferred temperature maintain mode If the system has electric strip heat back up within the air handler the system can operate together with the electric supplement heat as the strip heating coils are installed downstream of the refrigerant heat exchanger The electric strip heat is supplemental to the heat provided by the geothermal system The thermostat used wit...

Page 8: ...efrigerantlineconnectionsarecompleted itisrequired that you leak check and evacuate the indoor section and all line connections using proper methods before finalizing the full system refrigerant charge For final charges based on matched systems and specified line lengths see Table 4 page 9 Pressure test the entire system at 400 psig with dry nitrogen prior to pulling a vacuum and charging Prior to...

Page 9: ...n by using the following formula TROV ft 3 Total refrigerant charge lb x 40 The examples below were calculated assuming 25 single line length between well and compressor sections L1 and 6 single line length between compressor section and air handler L2 For the 2 ton example the well length is 200 ft and for the 5 ton example the well length is 400 ft as shown in Table 4 Theinstalledsystemiswithane...

Page 10: ...g the compressor to draw high watts Too little refrigerant will freeze the indoor coil in cooling mode operation The recommended charging method is to charge refrigerant to the middle of the sight glass of the accumulator during heating operation In cooling mode with correct R 410A charge the refrigerant returning from the well is in a saturated condition The conventional method of charging by sub...

Page 11: ...rt e If the system has run in the previous 5 minutes a 5 minute anti short cycle timer must expire before the system will restart 3 If the above conditions are met the compressor will start and the reversing valve shift into position if not already in the cooling position a At any time during compressor operation the system will stop if The discharge pressure exceeds 635 psig The suction pressure ...

Page 12: ...lter which is installed at the factory The second filter is to be used as a replacement within 24 to 48 hours of operation These coalescent filters will pick up all dirt and particulates down to 0 3 microns Typical filter driers only catch 50 microns or larger Frequently check the pressure drop across the separator on new installations See Figure 2 and Table 5 page 10 Changethefilterafteraninitial...

Page 13: ...e numbers represent the firmware version When the unit is ready to run it will display which indicates that the unit is in standby mode The display will alternate between the current status and any current or recent events See Table 7 page 14 for status and event codes The display alternates between showing the current status code and the 5 most recent event codes as shown in Table 3 If an event c...

Page 14: ... compressor will eventually overheat and shut off by its own internal overload since the motor s windings are not being cooled by refrigerant vapor Sand Or Dirt In The Sub Surface Tubing Prior to Initial Charging The following steps should be performed if debris removal is required after the field lines have been connected to the liquid line assembly 1 Recoverallrefrigerantfromfromthelinesettotheb...

Page 15: ...d Air In The Winter Or Cooled Air In The Summer Check system operational pressures for a potential refrigerant leak operational pressures will be too low NOTE If pressures are too high in the summer or too low in the winter the geothermal heat pump exchange field may have been overstressed This can be accomplished by either turning the system off use your supplemental back up heating during the wi...

Page 16: ...l Separator Bracket Check Valve Hot Gas Bypass Valve Coil Large Valve Small Valve EXV Valve Coil Solenoid Valve Coil Figure 6 Components H W L 8 72 11 25 13 86 16 38 19 90 22 40 1 54 5 42 5 26 Liquid Line to Air Handler Vapor Line to Air Handler Vapor Line to Earth Loop Liquid Line to Earth Loop Line Voltage Connections Low Voltage Connections Figure 5 Dimensions ...

Page 17: ...nnect to 24 vac 60va class 2 circuit See air handler installation instructions for control circuit and optional relay transformer kits 711415B Replaces 711415A 04 20 W2 W1 O C Y2 R Y1 RELAY THESE WIRES RELAY AND WELL SEAL VALVE ON 4 5 TON 14 17 5 kW UNITS ONLY CCH SUCTION TEMP TO 1PH POWER SUPPLY GND CONTACTOR T2 L2 T1 REVERSING VALVE 1 2 3 4 5 6 7 HOT GAS INJECTOR EXV MOTOR SUCTION PRESSURE SENSO...

Page 18: ...MMN36K B B6EMMN60K C B6EMMN60K C Physical Data Length L 25 1 25 1 25 1 25 1 Width W 25 2 25 2 25 2 25 2 Height H 30 5 30 5 30 5 30 5 Weight 165 170 215 220 Refrigerant Vapor Line O D Both to air handler and earth loop 3 4 3 4 7 8 7 8 Liquid Line O D Both to air handler and earth loop 1 2 1 2 1 2 1 2 Unit is shipped from factory with nitrogen holding charge Table 9 Electrical Physical Data Insulate...

Page 19: ... Star Wade Hampton Nome Yukon Koyukuk North Slope NOTE Zone 1 includes Hawaii Guam Puerto Rico and the Virgin Islands Figure 9 Climate Map IECC Zones Earth Loop Size ft ton 1 2 3A 3B 100 3C 4A 4B 80 4C 5 6 7 8 65 There are exceptions to the earth loop sizes shown in this table Within a climate zone the weather and underground conditions vary from place to place The earth loop length may need to be...

Page 20: ...e size Number of borehole s or Earth Loop s _____________________ Depth of each borehole or Earth Loop____________________ Ft Line set size Vapor line O D Inches _______ Liquid line O D inches ________ Line set distances to each well______________________ distance between the compressor and the air handler Distance feet ___________________________________ Tubing size Vapor line O D Inches _______ ...

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