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1. 3 low stage starts the zpeodied start voltage at VH terminal wee not soheewed amp start relay was de energzed Low looked out for JU minutes Speoted stant voltage at V5 terminal was not achieved high stage Start relay vens de energized after 1 zeannd 3 Gonzenugtee high stage starts the speofed start voltage at VS termina wee not soheewed amp start relay was de energzed High stage looked out for 30 Mminubes Thermal cutout ooours in three oonzeoubve lawihigh stage odes Law stage looked out for 4 hours or until 24v power reoyoled Thermal cutout ooours in three oonseoubwe high low stage oyodles High stage looked out for 4 hours or until 24v power reoyoled Low pressure sebon inp has ooounred dunng A oonsecutve oyoles Int aperaban looked out for 3 hours or until 24v power recyaled High pressure inp has panurred dunng 3 conseoutwe cycles Unk operation looked out for hours of until 24 power recyoled Compressor voltage not sensed when aompressor should be starting Low stage contactor may be stuck open or there ts a winng erroc Compressor voltage not sensed when compressor should be starting High stage contactor may be stuck open or there is a wining erroc Using Nitrogen Is Not Optional E ME UN H i amo mn gt gg Carbon deposits resulting from not using nitrogen during brazing ang of nitrogen 16
2. Brazing e Purge with nitrogen while brazing Nitrogen prevents carbon that be washed with POE oil and can cause restrictions and oil decomposition 17 Part UNF3 555 00 UnMIWVEELL Store home Sinus a Pumps Electric motors UNIWELD Nitrogen Flowmeter NEW HVAC Precision Controls Measuring Refrigeration aW Power tools 0 Hand Tools 1 Heating Elements Appliance parts 0 Other e Low pressure nitrogen gas must be flowing through the copper lines when brazing to eliminate scale and oxidation that can cause blockage in a system e A flowmeter works in conjunction with a regulator to accurately calibrate the outlet pressure while monitoring the flow of gas a regulator can be adjusted to deliver low pressure but by itself won t tell you in nitrogen is flowing e A nitrogen flowmeter has a float ball that rises in the flowmeter tube indicating low pressure flow of nitrogen when purging copper lines during the brazing process e 1 4 flare outlet connection attaches directly to any nitrogen regulator with a 1 4 male flare outlet fitting E E he Done Internet 100 FBACNFO18 060 amp piston use DSB 10 0008 provides most of the information needed to answerer these questions DSB 10 0008 pdf This document is the highlight slide from the Spring Update class on the FBAC FB4 Update Class Slide pdf Picture examples of the indoor cooling and outdoor
3. amp liquid line connection Furnace Coil Conversion R410a TXV to R 22 Accurater Carrier Furnace Coil Conversion Useful Service Manuals Hesidential PDF Residential 2009 Fan Coil Service Mobile Home Res Split HP AC Piping Long Manual 6sm pd Small Packag service Manual Light Commercial 48TC 15 25 Ton 50 3 10 Ton 50TCQ 3 8 5 Service Manual service Manual p on Service Manual Review Tips Low Voltage Multi Voltage Transformer Check to see that the Control Transformer Primary Connection is tapped for the correct voltage When tapped for the wrong primary Secondary voltage and or Current will be effected Tips Low Voltage Total mE Amp Volt Amps Of a Circuit Secondary Voltage 75 24 VAC 3 125 Amps Actual operating VAC will be more accurate Tattle Tales Parts to make your own be purchased at Radio Shack 1 in line fuse holder U V 1 X Blass fuse size Tips Air Acid amp Moisture Vacuum Pump Maintenance The oil used in a vacuum pump can quickly become contaminated On average it should be changed after every 10 hours of operation or immediately after evacuating a wet or contaminated system All quality vacuum pumps have a gas ballast that should be opened during the early stages of an evacuation Tips Charging Techniques Weigh in Method When can you use this method
4. Code Review OPERATION FAULT Standby pp gall far unit operator Standerd Thermo Emergenoy Mode cint Cono Unt being controlled by standerd thermostat inputs instead of In amp nity Con e SS oomini eral Only high stage operston iz evadable The operating mode should be SSHNAB ESANA only PS INAB ESANAT flashing used in emergency situations andy only Caw Stage Cool Hen Operaio Figh Siage Coolen Operstar 2 pauza POSSIBLE CAUSE AND ACTION system Commu Communication with User Imerese lost Check wining ta Ul indoor and reomhons Failure outdoor units Invalid M CGontral does not detect a model plug ar detects en invalid model plug Unit will nat operste without correct model plug High Pressure High pressure swrioch trip Cheok refrigerant abarge outdoor fan operation Oper and oailz for restrigtians Law Pressure Oper jar Line voltage ER for at lemst 4 mprezsor and fan operation not alowed until voltage 190v Verny line voltage 230 at U Measured at L1 and L2 on oroug board Outdoor Temp Outdoor ar sensor nat reading of aut of range Ohm aut sensor and oheak sensor Fault winng There iz no 230v at the oontmotor when indoor unt amp powered and cooling heating demand existe Verbe the dsoopnent is closed and 2S0v wring iz oannenbed to the unit Outdoor Coil Sensor Faut Col serear not rea
5. 0 38 36 33 32 110 50 48 46 45 44 42 40 38 36 34 32 45 43 42 40 39 37 35 33 32 40 39 37 35 34 32 100 25 34 32 None Required 40 50 GO 70 BO Relative Humidity Possible contributing factors Low airflow causes a cold coil and Low SAT e Low insulation R value Zoning bypass open for long periods can cause the same Wet insulation Wrap not properly installed to tight Wrap the supply plenum and add duct liner Wrap the fan coil ma Use mesh hanging material under duct wrap and seal penetration with mastic Hanging duct helps with evaporation and insulation compression If attic temp is high and RH is low evaporation helps prevent duct sweating Install duct wrap over damper actuators Possible contributing factors Leaking duct Air leaks in the SA will cause the insulation to be well below DP Extremely high Dew Point Look for possible contributors Power Attic Ventilators Disable them PAV s introduce more moisture into the attic and keep it cooler causing a higher and less evaporation generally cause moisture infiltration into the conditioned space Sweating Bottom Line Hotter is better The hotter the attic the warmer the surface temperatures and the lower the RH Warmer surface temperatures less likely to be below Dew Point Lower RH Better chance for condensation to evaporate Hanging duct helps so don t lay it on the
6. 2 4 6 10 mp set not recommended Fitting Losses 30 STO S0 LONG RAD Fig 32 Tube Fitting Geometry Table amp 6 EFittmg Losses in Equivalent Feet EN Outdoor Heat Pump Piston Resizing Table 5 R 410A Maximum Equivalent Length feet Outdoor Unit Below Indoor Unit Model Si Vertical Separation feet odel Size 0 20 21 20 31 40 41 50 51 60 61 70 71 80 18 1 ton 24 2 ton 30 27 ton 42 83 ton 48 4 ton i 80 5 ton so i8 10 Dashes indicate vertical separation exceeds allowable limits Table 6 R 410A Heat Pump Outdoor Piston Change Outdoor Unit Below Indoor Unit Model Si Vertical Separation feet odel Size gg 18 175 ton 24 2 ton 350 2580 20 1600 JL uem o uw v 42 2 0 o 0 9 9 9 Berm 1 1 2 2 3 3 _6 ton 0 A 2 2 2 3 3 ECC a 1 2 gt 99 59 51 1 c gt ss o Stm o dq 1 2 3 3 dq m Dashes indicate vertical separation exceeds allowable limits Outdoor Heat Pump Unit Piston Resizing Table H 410A Heat Pump Outdoor Piston Change Outdoor Unit Above Indoor Unit Model Si Vertical Separation feet ES 20 25 26 50 JF 76 100 101 125 126 150 151 175 176 200 18 1 ton 30 2 ton Fault
7. Anytime What is the unit charged for from the factory 15 feet How much do you add per foot of line set 6 oz ft Note 16 oz lb Note You must be using the standard line set size for the unit and not have greater than 80 ft EL of tubing Otherwise this method will not be accurate Example You have unit with 60 ft of line set assume proper diameters How much charge should be added 60 ft 15 ft 45 ft 45 ft x 6 oz ft 27 OZ 2702 X 1 lb 160z 1 69 Ibs Tips Charging Techniques When can you use this method Important Steps e When using a TXV e OD amb between 70 and 100 F e Damb between 70 and 80 e Must let unit run for 15 mins minimum e Charge must be added in short cycle intervals Opening of valve Assume constant OD Unit will be under temp charged in this Unit will be region over charged in this region 60 F 70 F 80 F 90 F ID Ambient Fan Coil Conversion Don t forget the Drain Pan Support Bracket REFRIGERANT AIR SEAL CONNECTIONS ASSEMBLY HORIZONTAL i AIGAT APPLICATION BRACKET HORIZONTAL DRAIN PAN J PRIMARY DRAIN HORIZONTAL RIGHT SECONDARY DRAIN HORIZONTAL Duct Sweating First we need to understand the problem To resolve sweating we must understand how to evaluate the problem Dew Point Dew Point is the temperature at which condensation forms When air comes in contact with a surface that is at o
8. Safety Always observe the Manufacturers Safety Precautions and Warning Tags Read and follow all safety instructions given in the manufacturer s installation instructions Always turn off the main power to a system before making any repairs There may be more than one disconnect switch If applicable turn off the accessory power Tag and lock out all disconnect switches Safety Always observe the Manufacturers Safety Precautions and Warning Tags Always remove rings watches and other jewelry to lesson the chance of electrical shock When taking voltage or continuity measurements on compressor in a pressurized system do not take the measurement directly at the compressor terminals Disconnect the compressor leads at the contactor to take the measurements Noise Complaints INSTALLATION RECOMMENDATIONS NOTE In some cases noise in the living area has been traced to gas pulsations from improper installation of equipment 1 Locate unit away from windows patios decks etc where unit operation sound may disturb customer 2 Ensure that vapor and liquid tube diameters are appropriate for unit capacity 3 Run refrigerant tubes as directly as possible by avoiding unnecessary turns and bends 4 Leave some slack between structure and unit to absorb vibration 5 When passing refrigerant tubes through the wall seal opening with RTV or other pliable silicon based caulk See Fig 1 6 Avoid d
9. attic floor Problems When Resizing Equipment Customer perceptions Why do have 3 tons when my neighbor has 5 tons Opportunity Explain longer run cycle better life efficiency and humidity control a higher set point Customer complaint Why is my equipment running so long Its never done that before Must be explained Pre sale Greater vulnerability to poorly installed systems duct leakage improper refrigerant charge or low airflow Higher recovery times from deep setbacks instruct customers to set amp forget thermostats Correct equipment selection Higher Seer upgrade more than just an efficiency change Higher SEER non variable speed fan coils have a reduced latent capacity when compared to a less efficient system Impact of amp ir Conditioner Cycle Length on Hum dity Removal BG Latent Motture Capacity ua Sensible Capacity thermostat RN a m 04 0 3 Source Khattar Swami amp Ramanan 1857 02 2 Ano other Aspect of Duty Cycling Effects on dA ASHRAE Transactions FSEL PF Normalized Maximum Cooling Capacity c OH 04 1 0 20 40 Bn 80 100 120 149 160 120 200 Elapsed Time Since Cycle Start seconds On average it takes a 13 SEER system 10 15 minutes to obtain full latent capacity Compared to 5 7 minutes for a 1OSEER system bigger warmer evap coil Variable speed has a fan on delay Infinity E
10. cated suction line loop Reciprocating compressors may have a noticeable discharge pulsation that could be remedied with a field installed discharge muffler Recommend loop by continuous tubing with no more than 12 inches vertical and 6 inch horizontal loop es i TT l Note Long radius elbows recommended Fig 14 Suction Line Loop Noise Complaints Enable Quiet Shift or for lower tier equipment upgrade the defrost board to one that has the Quiet Shift feature Quiet Shift Upgrade document to help with the process Once Quiet Shift is enabled the compressor will stop for 30 seconds at defrost initiation and termination to prevent this noise defrost board is upgraded please send me or your TM the complete model and serial so can report it Quiet Shift Upgrade pdf Noise Complaints e Part number EF17BZ251 e Field Solution e Replace With e EF17BZ252 Nuisance moose call noise from HP going in out of defrost Developing repeatable test to replicate the noise each and every time Supplier of reversing valve has visited and verified the noise Working to isolate the root cause of the moose call from a component to system solution Issue appears to be a flow related noise that occurs after the mid point of the shift coming out of defrost Reversing Valve Troubleshooting PaaS Fig 21 Reversing Valve Cooling Mode or Defrost Mode Solenoid Energ
11. ding ar out of range Ohm out sensor and Geck winng Thermistors out of mproper relationship between ood sensor and outdoor mr sensor Ohm out range sensors and oheok winng Compressor operation detected then disappears while low stage demand exets Possible amuses are interial compressor overload trip ar stert relay and oapanipr held in cirourt foo long f installed Low Stage Thermal Cusout Fault Code Review High Stage Thermal Cussut Caoantastpr Shorted 2304 at Compressor AAN AS Only Low Stage Did Not Start 2H NAB Only Law Stage Did Nat ota 2 times eH NABOnIy High Stage Did Not Start aH NAB Only High Stage Did Not Stan 2 imes 25H NAB Only Low Stage Thermal Lockout High Stage Thermal Lookout ow Pressure Lookout High Fressure Lackaut Law Contastor Open 25 Only High Conter Open 25H NAB Only Compressor operation detected then disappears while high stage demand exests Possible onuses are intemal compressor overload trip ar stert relay and oapaotor held in mirout too long vn installed Compressor voltage sensed when mo demand for compressor aperabhon exacts Contactor mey be stuck dosed ar there is a wiring errpr Compressor volage not sensed when aompressor should be starting Con may be stuok open or there i a wiring error Speofied start voltage at VR terminal was not achieved in law stage Start relay vas de energied after 1 zeannd
12. heating pistons Notice the note on the bottom of slide 1 You may use FB4C s as a R 22 fan coil replacement by removing the R410a piston and re installing the R 22 piston that was in the old Carrier Bryant or Payne coil Piston Models pdf FBACNFO18 060 amp piston use Current Super Heat chart for use with a cooling piston as the older slide charts are not compatible with the current product New HP Superh eat Chart doc Part number and drill size of old style and new style pistons Piston Models xls Additional outdoor units including piston size approved to be used with the FBAC with a piston since the release of DSB10 0008 Pistons by del 05 08 2010 Hemember to always check PD for proper matches and ratings Furnace Coil Conversion Carrier Factory Installed R410a TXV Furnace Coll When converting you must weld shut equalization connection Furnace Coil Conversion 324177 01 ADAPTER ASSY 8B Brea Convert current production 410A furnace coil back to R22 in order to satisfy a customers warranty request Action Reuse the old piston that was in the original R22 evaporator coil Solder the equalizer tube closed at the suction header tube RCD part numbers Usage location 324177 701 Adapter Assembly Attach to the new 410A distributor assembly 318289 301 Tube Body Coupling Adapter Body to hold the piston 311682 201 Adapter Piston retainer
13. irect tubing contact with water pipes duct work floor joists wall studs floors and walls 7 Do not suspend refrigerant tubing from joists and studs with a rigid wire or strap which comes in direct contact with tubing See Fig 1 8 Ensure that tubing insulation is pliable and completely surrounds vapor tube 9 When necessary use hanger straps which are 1 in wide and conform to shape of tubing insulation See Fig 1 10 Isolate hanger straps from insulation by using metal sleeves bent to conform to shape of insulation Noise Complaints Operational vibration could indicate a charge issue Verify charge and ensure proper piping and structural penetration insulation Tubing that is too rigid to building rafters without proper insulation could transfer noise throughout the structure e On some occasions a sound dampener or mass weight RCD part no 328209 751 placed on Cil y vibrating tubing has been known to reduce this noise EE Utilizing compressor split post grommets see Fig also reduce this vibration H piping cannot be remedied Split Post Grommet part number KA75UG100 Noise Complaints operational high pitch frequency or waa waa sound that appears to resonate through the suction line could indicate a need to add more flex or muffling in the lines This has been occasional in scroll compressor applications and is usually remedied by adding a field fabri
14. ized TO FROM ACCUMULATOR TO INDOOR COIL een VIA SERVICE VALVE ON OUTDOOR COIL INSULATE FOR TP 3 ACCURATE E J INSULATE FOR ACCURATE READING FROM COMPRESSOR DISCHARGE LINE ELECTRONIC THERMOMETER AB8341 Fig 22 Reversing Valve Heating Mode Solenoid De Energized Light Commercial Split A Bi Flow kit must be added to the LLSV to convert them to heat pump operation Ordering Number Liquid Line Size Mfg Part Number Sight Glass AUQO7 575Jx07 EF680033 ALC 066208 CHS07 HMI 1TT3 AUQ08 12 575Jx08 12 5091 121 EF680034 ALCO066209 HMI 1TT4 EF680037 oolenoid Coil Assy AMG 24 5060 EF680039 Bi Flow Kit ALC066224 All Heat Pumps SuperHeat Normal 5 20 10psig 4 3 average based on SST range 29 5 55 1 Table 7 Puron System Suction Pressure Drop Nominal Suction Line Pressure Suction Puron Suction Line Pressure Drop peig Size ap Drop Velocity Total Equivalent Line Length ft 4 100 20 50 80 100 125 150 175 200 225 250 _ ie 1648 215 10 IESU 18000 s8 a 1 gt 2 3 4 15 5 e 7 e EA O a2 ee 1 gt gt 12 16 2133 Ee EE ae 24000 se 52 787 1 3 4 5 7 8 9 o 3 d 20 SM 011 2 2 2 3 3 4 4 5 RE ER EIN ON ME BEEN RER 1696
15. r below its Dew Point temperature condensation will form on that surface Dew Point calculation Duct Sweating All this means is that if condensation is forming the surface on which it is forming is below Dew Point To prevent the condensation the surface must be above Dew Point Dew Point in a attic can easily be above 80 Can the insulation surface temperature be below 807 YES Dew Point amp Relative Humidity 130 grains pound 121 Degrees DP can be constant while RH changes 130 grains pound 97 Degrees 130 grains pound 5 Degrees 100 RH 50 RH 25 RH Inside structure Outside In Attic Duct Sweating Dew Point Table Relative Humidit Air Temp t 100 _96 _90 _85 _80 _75 70 6560 55 50 45 40 35 30 25 20 15 10 110 110 108 106 104 102 100 98 95 93 90 87 84 80 5 60 51 41 105 105 103 101 99 97 95 93 91 88 85 83 80 76 72 is s 55 47 37 100 100 99 97 95 93 91 89 86 D 78 75 71 67 63 58 52 44 32 95 93 92 90 88 86 84 81 79 76 73 70 67 63 59 54 48 40 32 90 88 87 85 Dei 79 76 74 71 68 65 62 59 54 49 43 36 32 Insulation required to prevent 85 83 81 80 78 74 72 69 67 64 61 58 54 50 45 38 32 7 80 78 77 75 73 71 69 67 65 62 59 56 53 50 45 40 35 32 condensation 75 73 72 70 68 66 64 62 60 58 55 52 49 45 41 36 32 70 68 67 65 63 61 59 57 55 53 50 47 44 40 37 32 Temp 65 63 62 60 59 57 55 53 50 48 45 42 40 36 32 Deg F 60 58 57 55 53 52 50 48 45 43 41 38 35 32 55 53 52 50 49 47 45 43 4
16. volution has a reduced fan speed for the first 10 minutes of operation and no fan off delay in the cooling mode e wo stage equipment will have a much longer run cycle than single stage No load humidity control Supplemental dehumidification system Used to control indoor humidity when there is no sensible load Cool cloudy and or rainy days Also at night A better option than lowering the cooling set point This will actually raise the RH and cause possible condensation of the structure

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