valutazioni - 5, GPA: 3.6 ( )

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If below the chart value remove refrigerant. If below the limit line, remove refrigerant. Example (Using the 12,000 Btuh cooling chart): 1. Suction pressure is 65 psi. which equals 38° F on The R-22 Scale of the Low- Side gauge. 2. Suction line temperature taken at the unit is 70° F. 70° F minus 38° F equals 32° F superheat. Instructions: 1. Measure suction pressure and determine evaporator-refrigerant temperature on R-22 scale of low-side gauge. 2. Measure suction-line temperature on suction line of the unit. 3. Measure outdoor and indoor temperatures. 4. Determine from the table what the superheat should be for the indoor and outdoor temperatures. (Example indicates 12° F superheat.) 5. Adjust charge if needed. Be sure unit is running at stabilized condition. 3. Outdoor temperature is 90° F, indoor temperature is 80° F. 4. Intersection of the indoor-temperature and outdoor-temperature lines occur on the 12° F superheat line. 5. Add charge to obtain 12° F superheat. NOTE: For installation of the indoor unit and start-up of the system, please refer to the appropriate installation manual for your indoor product to complete the installation. STarTing THe uniT • Before starting the unit in cool weather, power the system 24 hours before attempting to start. • Do a final system check using the super- heat/subcooling method. Record results on Test Unit Performance Data sheet (next page). -Cooling mode superheat is set with a proper sized piston and charge, using the field charging charts. -HeatingmodesuperheatissetwithaTXVand shouldbe5-10°F. Whenchargingasystem in heat mode, use the subcool method field charging charts. • Removegaugeset.Mountallaccesspanels and make sure they are properly secured. • Make final visual inspection and repair any deficiencies. (Proceed to the Sequence Of Operation on the following pages) 18multi-zone Heat Pump Condensing units StArt-uP And trouBlESHootIng tESt ProcEdurE StArt-uP And trouBlESHootIng tESt ProcEdurE The Test Unit Performance Data sheet below is provided for use by a qualified service professional. In order for our Technical Service Department to better serve you, please complete and have this information ready when calling. Make sure to include the Model Number, Serial Number, Date of Installation. Call our Technical Support Department @ 1-800-228-9364. Test unit Performance data Date: Model Number Technician: Serial Number Mode: Cooling indoor Section notes Evaporator Entering Air - DB Note: Rotary compressors are critically charged systems, do not over charge. Refer to the Charge Table specific to the unit being installed or call the factory. Anti-short cycle protection should be used on systems that use a conventional thermostat. Evaporator Entering Air - WB Evaporator Leaving Air - DB Evaporator Leaving Air - WB outdoor Section Entering Air Leaving Air Temperature Split operating Pressures Compressor Suction - PSIG Compressor Discharge - PSIG Power input Compressor - Volts Compressor - Amps OD Fan Motor - Volts OD Fan Motor - Amps ID Fan Motor - Volts ID Fan Motor - Amps Total Volts Total Amps Temperatures - degrees F° Compressor Suction Compressor Discharge Liquid Out Cond. Liquid before Expansion Suction out Evaporator Capacity Calculations DB - Temp Split at evap. Test Summary Compressor Superheat Sub Cooling 19multi-zone Heat Pump Condensing units Save this information for future servicing. In the event there is a problem with the unit. Perform the test again (if possible) and have both sets of data ready when calling for assistance. MultI-zonE condEnSEr SEquEncE of oPErAtIon MultI-zonE condEnSEr SEquEncE of oPErAtIon EMI America Series multi-zone heat pump condensers are designed to operate with EMI America Series indoor air handlers. Both the condenser (outdoor unit) and evaporator (indoor unit) have a high Volt service connection. Each is to be independently connected to the electrical service panel. (See the unit name plate for the correct breaker type and size). The outdoor and indoor units are also connected to each other through a low Volt interconnect wiring. A 24V transformer located in the indoor unit provides the low Volt power source. The S & T series (S2HB, T2HB, T3HB & T4HB) heat pumps will provide comfort cooling or heat pump operation operate at an outdoor temperature range between 35°F and 115°F for cooling, 0°F and 75°F for (heat pump) heating. The S & T series (S2HB, T2HB, T3HB & T4HB) heat pump condensers are designed to operate as a single stage cooling, two stage heating unit. For full operation the unit should be matched with an appropriate EMI indoor unit with electric heat and unit mounted controls or a wall mounted thermostat. For two stage heating operation the indoor unit must be equipped with an electric strip heater. See the instruction manual for the indoor unit on the selection of the proper thermostat for the system. Condenser Operation: The transformer located in the indoor unit provides...

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