Fluke 561 User's Manual
Contents
1. Checking for Blockage in Air To Air Evaporators or Condensers Checking Superheat on Fixed Restrictor or Capillary Tube Equipped Evaporators sss Checking Subcooling on Air To Air Systems With Expansion Valve Equipped Evaporators sss Malnt narnC s sidere eere nti E Cer eri n Changing the Battery Cleaning the Lens Cleaning the Housing Troubleshooting CE Certification n ice sete eeepc 8 561 HVAC PRO Infrared Thermometer Introduction The Fluke Model 561 HVACPro Infrared Thermometer hereafter the Thermometer can determine the surface temperature by measuring the amount of infrared energy radiated by the target s surface or by contact using a thermocouple probe The Thermometer was designed specifically for use in heating ventilating and air conditioning HVAC applications Contacting Fluke To contact Fluke call one of the following telephone numbers USA 1 888 44 FLUKE 1 888 443 5853 Canada 1 800 36 FLUKE 1 800 363 5853 Europe 31 40 267 5200 Japan 81 3 3434 0181 Singapore 65 738 5655 Anywhere in the world 1 425 446 5500 For USA Service 1 888 99 FLUKE 1 888 993 5853 Or visit Fluke s Web site at www fluke com To register your product visit register f2. IntroQductiQRn her t Contacting Fluke Safety InOF mation ccc rire ertet How the Thermometer Works Operating the Thermometer sss Locating a Hot or Cold Spot sse Distance and Spot Size Field of View Emissivity sss Switching Between C and Using the Contact Temperature Probe HOLD teri eerte Typical Measurements ssssssssseenenenennnnnnnnnnnns Measuring Heating Cooling Duct Insulation Jacket Temperature Measuring Dewpoint Temperature Testing Insulated Return Scanning Walls for Air Leaks or Insulation Deficiencies Testing Contactors Starters sss Testing Enclosed Relays Testing Fuses and Buss Connections Testing Electrical Connections Testing Bearings Testing Belts and 4 Checking Hydronic Radiant Heat Applications Testing Radiant Heat Applications Testing Water Heater Insulation esses Testing Steam Traps sse 561 HVACPro Users Manual Measuring Grille Register or Diffuser Discharge Temperature Verifying Thermostat Room Sensor
3. When the trigger is pulled again the Thermometer will begin measuring in the last function selected Typical Measurements This section describes a variety of measurements often performed by HVAC technicians The backlight and laser are on whenever you are making readings with the Thermometer Measuring Heating Cooling Duct Insulation Jacket Temperature 1 Press E and then press to select an emissivity setting HI emissivity for vinyl or PVC jacketed insulation LO emissivity for foil faced insulation Note Alternately place black electrical tape on jacket surface Scan to compare tape and insulation jacket temperatures Adjust emissivity so insulation jacket temperature is closest to tape temperature 2 Connect the thermocouple probe The probe hangs in the air to measure ambient air temperature in order to compare the temperature differential Temperature deviation between the insulation jacket and ambient air temperature indicates leaky or ineffective insulation 3 Scan the insulation jacket temperature Measuring Dewpoint Temperature The temperature of the duct insulation jacket at any single point is a critical temperature If jacket temperature reaches dewpoint temperature condensation will form 10 Infrared Thermometer Typical Measurements The most likely conditions for condensation formation are low dry bulb temperature and high wet bulb temperature low temperature high relative humidity Use the Fluke 9
4. resulting from excess friction Repeat the sequence for the blower bearings Testing Belts and Sheaves SO ee Press B and then press to select HI emissivity Press and then press to select MAX Enable the motor and allow it to reach a steady state operating temperatures Aim the Thermometer at the surface to be measured Direct the Thermometer to outside face of belt where it rides in sheave or to the side of sheave at outer edge whichever is safer or allows easier use of the Thermometer Start recording temperature Slowly move the Thermometer up the belt toward second sheave If belt is slipping sheave temperature will be high from friction If belt is slipping belt temperature will remain high between sheaves If belt is not slipping belt temperature will reduce between sheaves If inner surfaces of sheaves are not a true V shape this indicates belt slippage and will continue to operate at elevated temperatures until sheave is replaced Sheaves must be properly aligned including pitch amp yaw for belt and sheaves to operate at appropriate temperatures A straight edge or taut string can be used to check alignments Motor sheave should operate at a temperatures consistent with blower sheaves If motor sheave is at a higher temperature at motor shaft than at outer circumference belt is probably not slipping e If outer circumference of sheave is at higher temperature than sheave at motor shaft
5. then belt is probably slipping and sheaves may be misaligned Checking Hydronic Radiant Heat Applications Radiant heat tubes in the floor will normally run parallel to the outside walls Starting at the floor wall juncture scan parallel to the wall while moving into the room away from the wall Parallel to the outside 13 561 HVACPro Users Manual wall you should find parallel isothermal rows indicating the location of heat tubes below the surface Perpendicular to the outside wall you should find rising and falling temperatures at equal distances High temperatures indicate you are scanning a heat tube beneath the floor surface low falling temperatures indicate a space between the heat tubes T 2 3 4 Press B and then press to select HI emissivity Press Qu and then press to select MIN To locate radiant heat tubes in floor temporarily elevate the loop temperature to create hotter spots for identifying tubing runs Before releasing trigger press to toggle between MIN MAX DIF floor temperatures and record the temperatures for future comparison and trending under similar conditions Testing Radiant Heat Applications TWO e NS Operate radiant heat loop until steady state conditions are achieved Attach the thermocouple to supply of radiant loop Record the supply temperature Attach thermocouple to return of radiant loop Record the return temperature Difference is Delta T temperature differenc
6. 1 and Figure 1 show various symbols and safety markings that are on the Thermometer and in this manual Table 1 Symbols Risk of danger Important information See Manual wmum O Conforms to requirements of European Union and European Free Trade Association EFTA Do not dispose of this product as unsorted municipal waste Contact Fluke or a qualified recycler for disposal N 4 Chinese manufacturing mark for products manufactured in the Peoples 180112000922 Republic of China PRC Infrared Thermometer Features 4 AVOID EXPOSURE LASER RADIATION CAUTION Z LASER RADIATION DO NOT STARE INTO BEAM OUTPUT lt 1mW WAVELENGTH 630 670nm CLASS 2 Il LASER PRODUCT COMPLIES WITH FDA 21CFR R 1040 10 AND 1040 11 mmm COMPLIES WITH IEC 60825 efh01Of eps Figure 1 Symbols and Safety Markings Features The Thermometer includes Single spot Laser Sighting Backlit Display Hard Case Current Temperature Plus MIN MAX DIF Temperature Displays Easy Emissivity Selector Type K Thermocouple Velcro Pipe Probe Two AA Batteries Thermometer features are shown in Figure 2 561 HVACPro Users Manual Display EZ y zx Batteries 2 Function Buttons Battery Cover efh007f eps Figure 2 Infrared Thermometer Display The primary temperature display reports the current or last IR temp
7. 71 to measure the attic crawlspace relative humidity and determine the dew point temperature This is the temperature at which condensation will form on the duct wrap Use the thermocouple to measure the duct wrap surface temperature The temperature must remain above the attic or crawlspace dew point temperature at all times In attics the most likely time for dew point concerns is at night after the attic has cooled Less heat in the attic means less heat gain by the duct wrap which will be closer to the dew point temperature Crawlspaces are always cooler and problematic Tight ductwork and liberal duct insulation is essential Sealing openings insulating perimeter walls laying a continuous vapor barrier and adding a low temperature high capacity dehumidifier is often required to eliminate moisture and fungal problems Testing Insulated Return Ducts CH ONS 8 9 Connect a thermocouple probe Place the thermocouple probe in the return air stream at the return grille Read the return air temperature in the secondary temperature display Open a small test hole in the return duct at the air handler Place thermocouple probe into the return air stream at the air handler For consistency use the same probe as in step 2 80PK 25 80PK26 probes or similar are recommended for use through duct test holes Read the return air temperature in the secondary display Seal the test hole when finished Note Temperature differential sho
8. AX and DIF options The 2 button is used to show the MIN MAX and DIF functions in the secondary display whichever was pressed most recently Selects the emissivity setting You can toggle between LO 0 3 MED 0 7 or HI 0 95 using B ES K type thermocouple probe used to make contact temperature measurement 561 HVACPro Users Manual How the Thermometer Works Infrared thermometers measure the surface temperature of an opaque object The Thermometer s optics sense infrared energy which is collected and focused onto a detector The Thermometer s electronics then translate the information into a displayed temperature reading which appears on the display The laser is used for aiming purposes only Operating the Thermometer The Thermometer turns on when you press the trigger The Thermometer turns off when no activity is detected for 7 seconds To measure temperature aim the Thermometer at the target pull and hold the trigger Release the trigger to hold a temperature reading Be sure to consider distance to spot size ratio and field of view The laser is used for aiming only Locating a Hot or Cold Spot To find a hot or cold spot aim the Thermometer outside the target area Then slowly scan across the area with an up and down motion until you locate the hot or cold spot See Figure 4 efh014f eps Figure 4 Locating a Hot or Cold Spot Distance and Spot Size As the distance D from the target bei
9. FLUKE 561 HVACPro Infrared Thermometer PN 2562924 February 2006 2006 Fluke Corporation All rights reserved Printed in USA All product names are trademarks of their respective companies LIMITED WARRANTY AND LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for two years from the date of purchase This warranty does not cover fuses disposable batteries or damage from accident neglect misuse alteration contamination or abnormal conditions of operation or handling Resellers are not authorized to ex tend any other warranty on Fluke s behalf To obtain service during the warranty period contact your nearest Fluke authorized service center to obtain return au thorization information then send the product to that Service Center with a descrip tion of the problem THIS WARRANTY IS YOUR ONLY REMEDY NO OTHER WARRANTIES SUCH AS FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSED OR IMPLIED FLUKE IS NOT LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES ARISING FROM ANY CAUSE OR THEORY Since some states or countries do not allow the exclusion or limitation of an implied warranty or of incidental or consequential damages this limitation of liability may not apply to you Fluke Corporation Fluke Europe B V Box 9090 Box 1186 Everett WA 98206 9090 5602 BD Eindhoven U S A The Netherlands 11 99 Table of Contents Title Page
10. PK 25 or 26 into the supply duct Read supply air temperature on the secondary display Compare supply duct temperature to discharge air temperature They should be nearly equivalent If they are not check for duct leakage or insulation problems Patch the sample hole Verifying Thermostat Room Sensor Accuracy Sh oo NaS Db Insert the thermocouple probe into the Thermometer Record ambient air temperature Press E and then press to select HI emissivity Press Qu and then press to select DIF Aim the Thermometer at the wall thermostat Compare the wall temperature reading to thermostat cover temperature and thermocouple air temperature reading Look for possible source of heat or heat sink that could be affecting thermostat accuracy The temperature of the thermostat cover and surrounding wall surfaces should be very nearly equivalent DIF reading should be close to 0 Checking for Blockage in Air To Air Evaporators or Condensers Oo Remove panels to gain access to coil return bends or hairpins Press E and then press to select LO emissivity for copper tube Start the refrigeration system Aim the Thermometer at coil return bends hairpins Start recording temperature Take temperature of each return bend hairpin All evaporator return bends hairpins should be at or slightly above evaporator saturation temperature from the pressure temperature chart 15 561 HVACPro Users Manual All cond
11. ars in the secondary display The live infrared temperature continues to show in the primary display Connect the temperature probe as shown in Figure 8 efh009f eps Figure 8 Connecting the Temperature Probe 561 HVACPro Users Manual Table 3 lists recommended Fluke temperature probes for use with the Thermometer Table 3 Recommended Temperature Probes The piercing probe is the most versatile option Good for checking air temperature in 80PK 25 ducts surface temperature under carpets pads liquids thermometer wells vent temperatures and for penetrating pipe insulation 80PK 1 The general purpose bead probe is an alternative for quick accurate surface temperatures and air temperatures within ducts vent temperatures Pipe clamp probes 2 are essential for tracking continuously changing temperature 80PK 8 differentials on hydronic tubing and pipe loops and good for quick accurate refrigerant temperatures 80PK 26 The tapered probe is a good general purpose gas and surface probe with a good length and low mass tip casing for faster reaction to surface and air temperatures The insulation piercing probe provides a sharp tip to pierce pipe insulation and flat 80PK 9 probe tip for good surface thermal contact air temperatures within ducts and vent temperatures HOLD The display will remain activated for 7 seconds after the trigger is released HOLD appears in the upper middle of the display
12. c surface Experimentation using the probe to determine benchmark temperatures and experience will help you choose the best setting for specific measurements The Thermometer has three emissivity settings low 0 3 medium 0 7 and high 0 95 Refer to Table 2 The reference to emissivity settings in the table are suggestions for typical situations Your particular situation may differ 561 HVACPro Users Manual Table 2 Surface Emissivity Measured z Alloy A3003 Roughened Copper Electrical Terminal Blocks Oxidized High Medium Sandblasted Medium Low Electoropolished High Medium Switching Between C and F Measured Surface Iron Cast Oxidized Unoxidized Molten Iron Wrought High Medium Oxidized Molybdenum Oxidized Nickel Oxidized Platinum Black Oxidized Open the battery compartment and locate the switch positioned between the left side of the battery near the Thermometer wall To toggle between C and F use a small screwdriver or paper clip to move the switch to the desired position See Figure 7 Infrared Thermometer Operating the Thermometer 012 Figure 7 Switching Between C and F Using the Contact Temperature Probe A AWarning To avoid electrical shock or personal injury do not connect the optional external probe to live electrical circuits Connect the probe to the input on the top of the Thermometer The probe temperature and KTC appe
13. e Repeat for each loop to zone and balance for equal Delta T s Testing Water Heater Insulation T m TX qe Connect thermocouple probe to obtain ambient temperature near water heater Press E and then press to select HI emissivity for vinyl jacketed insulation or painted metal jacketed water heaters Press and then press to select DIF Aim the Thermometer at the water heater Scan the water heater jacket Scan in horizontal rows from top to bottom Press Qu and then press gt to read MAX and DIF jacket temperatures Record your readings The closer the jacket temperature is to ambient temperature the less jacket losses there are Standby losses account for a majority of the water heater energy expenses Increase water heater insulation to reduce standby losses Standby losses are losses when water is not being re heated by the burners or the elements When the water heater is idle standing by and no water is being drawn heat loss through the jacket and flue on oil gas systems are waste heat losses that can be reduced by increasing insulation and or lowering the temperature setting Testing Steam Traps Steam traps open on low temperature to allow steam flow to trap Steam traps close at steam temperatures to stop steam flow As steam temperature drops traps open to allow more steam flow and to return drain condensate 14 If temperature is low in steam pipe low in trap and low in condensat
14. e return trap may be stuck closed If temperature is high in steam pipe high in trap and high in condensate return trap may be stuck open If temperature is high in steam pipe high in trap and slightly lower in condensate return trap is probably operating properly 9 er co LE Infrared Thermometer Typical Measurements If system pressure has been increased above design settings this can result in symptom of trap failure stuck open Check steam pressure Press amp and then press to select HI emissivity for black iron pipe and painted traps Press and then press to select DIF Aim the Thermometer at the steam pipe Scan steam pipe upstream of trap Scan the steam trap Scan downstream of trap on condensate return side Press Qu and then press toggle to MIN MAX and DIF temperatures Record your readings Measuring Grille Register or Diffuser Discharge Temperature 60 00 SO 11 0 Press E and then press to select HI emissivity Aim the Thermometer at the discharge air grille register or diffuser Measure discharge temperature Release the trigger to freeze the temperature reading for 7 seconds and record the temperature Grille register or diffuser temperature should be equivalent to discharge temperature at the air handler Drill a sample hole in supply duct at air handler Connect thermocouple probe to Thermometer Insert thermocouple probe such as the 80
15. enser return bend hairpins should be at or slightly less than condenser saturation temperature If a group of return bends hairpins do not conform to expected temperatures that indicates a blocked or restricted distributor or distributor tube Checking Superheat on Fixed Restrictor or Capillary Tube Equipped Evaporators Note Superheat is a critical temperature 1 Ensure that filter and blower are clean and all registers are open and unobstructed 2 Clean section of suction line 15 2 cm 6 in upstream of compressor 3 Attach the thermocouple probe to the suction line with Velcro strap or use an 80PK 8 Pipe Clamp Temperature Probe Connect low side gauge to suction line 5 Start system and allow to run at least 10 minutes to reach a steady state condition 6 Measure the wet bulb temperature in the return using a sling psychrometer or Fluke 971 humidity meter 7 Aim the Thermometer to shady spot on the ground or at a piece of paper held in a shaded area and read outdoor temperature 8 Determine evaporator saturation temperature from pressure temperature chart 9 Read the suction line temperature on the secondary display 10 Subtract saturation temperature from suction line temperature 11 Correct superheat is based on outdoor temperature return air wet bulb temperature and 12 5 cubic meters minute per metric ton 400 cfm per ton of air moving across the evaporator Determine required superheat from manufacturer s s
16. erature read until the 7 second hold time elapses The secondary temperature display reports current thermocouple temperature when a type K thermocouple is attached When a thermocouple is not connected the small temperature display reports a choice of maximum minimum or difference between maximum and minimum temperature You can toggle through the minimum maximum and difference IR temperatures anytime the display is on The MIN MAX and DIF temperatures are constantly calculated and updated when the trigger is pressed After the trigger is released the MIN MAX DIF temperatures are held for 7 seconds Notes When the battery is low appears on the display The last selection MIN MAX DIF is maintained on the secondary display even after the Thermometer has been turned off providing the batteries have not failed Infrared Thermometer Buttons and Connector i 888 0 4 ec BBB m Ls MED HI efh01f eps Laser On symbol SCAN or HOLD C F symbol Celsius Fahrenheit Primary temperature display Secondary temperature display Emissivity LO MED HI Temperature values for the MIN MAX DIF KTC KTC indicates the thermocouple temperature GG CO Low Battery symbol Appears when the battery charge is 25 Figure 3 Thermometer Display Buttons and Connector Button eF Press and then press g to toggle between the MIN M
17. gh 0 95 Contact Probe Probe Typen rr Wrap thermocouple type K probe with miniconnector 0 C to 100 C 32 F to 212 F 2 2 C 4 F 0 1 C 0 1 F Maximum Minimum Differential Measurement Range Probe Accuracy Display Resolution Secondary Display Information Laser Single point laser Class 2 II operation Output lt 1 mW wavelength 630 to 670 nm Electrical Power Supply Power Consumption Physical 2 AA Batteries alkaline or NiCD At least 12 hours battery life 17 69 cm 6 965 in H x 16 36 cm 6 441 in L x 5 18 cm 2 039 in W 0 322 kg 0 7099 Ib Approximately 100 cm 40 in Total Length of Thermocouple Environmental Operating Temperature 0 C to 50 32 F to 120 F Relative Humidity i e eser tirer panes 0 to 90 noncondensing up to 30 C 86 F Storage Temperatute irri teintes 20 C to 65 C 4 F to 150 F Optional Accessories sssseett Soft Case 18
18. luke com 561 HVACPro Users Manual Safety Information A Warning A Warning identifies conditions and actions that pose hazards to the user To avoid electrical shock or personal injury follow these guidelines A Do not point laser directly at eye or indirectly off reflective surfaces e Before using the Thermometer inspect the case Do not use the Thermometer if it appears damaged Look for cracks or missing plastic e Replace the batteries as soon as the battery indicator appears Do not use the Thermometer if it operates abnormally Protection may be impaired When in doubt have the Thermometer serviced e Do not operate the Thermometer around explosive gas vapor or dust Do not connect the optional external probe to live electrical circuits e To avoid a burn hazard remember that highly reflective objects will often result in lower than actual temperature measurements e Do not use in a manner not specified by this manual or the protection supplied by the equipment may be impaired Caution To avoid damaging the thermometer or the equipment under test protect them from the following e EMF electro magnetic fields from arc welders induction heaters etc e Static electricity e Thermal shock caused by large or abrupt ambient temperature changes allow 30 minutes for the Thermometer to stabilize before use Do not leave the Thermometer or near objects of high temperature Table
19. ng measured increases the spot size S of the area measured by the unit becomes larger The spot sizes indicates 90 encircled energy The maximum D S is obtained when the Thermometer is 900 mm 36 in from the target resulting in a spot size of 75 mm 3 in See Figure 5 Infrared Thermometer Operating the Thermometer 132 mm 1500 mm 75mm 7 900 mm _ 3 15 36 12 D S 12 1 efhOO5f eps Figure 5 Distance and Spot Size Field of View Make sure that the target is larger than the spot size The smaller the target the closer you should be to it See Figure 6 004 Figure 6 Field of View Emissivity Emissivity describes the energy emitting characteristics of materials Most organic materials and painted or oxidized surfaces have an emissivity of about 0 95 If possible to compensate for inaccurate readings that may result from measuring shiny metal surfaces cover the surface to be measured with masking tape or flat black paint lt 148 C 300 F and use the high emissivity setting Allow time for the tape or paint to reach the same temperature as the surface beneath it Measure the temperature of the tape or painted surface If you cannot paint or use tape then you can improve the accuracy of your measurements with the emissivity selector Even with the emissivity selector it can be difficult to get a completely accurate infrared measurement of a target with a shiny or metalli
20. r leaks are caused by duct leaks that create a pressure differential across the conditioned space envelope 11 561 HVACPro Users Manual Testing Contactors Starters 1 e Press E to select emissivity Press 5 to select LO for bright contacts or MED for darkened contacts Press and the press to select MAX Measure line and load side of one pole without releasing trigger A temperature difference between the line and load sides of a pole indicate increased resistance of one point and a contactor may be failing Testing Enclosed Relays 1 ers om Press E and then press to set emissivity to LO for uninsulated connectors or HI for plastic encased relays or for bakelite enclosed relays or insulated connectors Press Qu and then press 5 to select MAX Start the scan Measure the relay casing looking for hot spots Measure electrical connections on relay terminals looking for hot spots Testing Fuses and Buss Connections 1 2 3 Press E and then press to set emissivity to HI for paper covered fuse body or insulated connections Press and then press 5 to select MAX Scan the paper covered length of fuse Without releasing the trigger scan each fuse Unequal temperatures between fuses may indicate voltage or amperage imbalance Press E and then press to select LO for metal fuses end caps and uninsulated buss connections Press and then press to select MAX Scan each end cap on each f
21. ressed air Carefully wipe the surface with a moist cotton swab The swab may be moistened with water Cleaning the Housing Use soap and water on a damp sponge or soft cloth ACaution To avoid damaging the Thermometer do NOT submerge it in water Troubleshooting Symptom Problem Action on display Target temperature is over or under Select target within specifications range Low battery Replace battery Blank display Possible dead battery Check and or replace battery Laser does not work 1 Low or dead battery 2 Ambient temperature above 40 C 104 F 1 Replace battery 2 Use in area with lower ambient temperature CE Certification The Thermometer conforms to the following standards EN61326 1 EMC EN61010 1 EN60825 1 Safety Certification testing was conducted using a frequency range of 80 to 1000 MHz with the instrument in three orientations 17 561 HVACPro Users Manual Specifications Infrared Measurement Range Spectral Range Accuracy 40 C to 550 C 40 F to 1022 F 8 to 14 microns 1 or 1 C 2 F lt 0 32 F 1 C 2 F 0 1 1 Assumes ambient operating temperature of 23 to 25 C 73 to 77 F sana 0 5 of reading or 1 C 2 F Repeatability Response Time 95 500 ms Distance to Spot D S 12 1 Emissivity Adjustment esent etes Three settings low 0 3 medium 0 7 hi
22. uld be negligible less than 1 to 2 degrees If the temperature difference is too much air leaks or insufficient duct insulation is indicated Seal duct connections at grilles boxes plenums transitions and take offs Retest If the test does not show satisfactory improvement then remove duct insulation seal duct seams and joints re wrap insulation seal insulation facing at all seams to ensure continuous vapor barrier Scanning Walls for Air Leaks or Insulation Deficiencies 1 2 3 Turn off heating cooling and blower Press e to select emissivity Press 5 to select HI for painted surfaces or window surfaces Press and select MIN when opposite side of wall is at lower temperature and or select MAX when opposite side of wall is at higher temperature Measure an interior partition wall surface temperature Do not release the trigger Record this temperature as your baseline or benchmark for a perfectly insulated wall Face the wall to be scanned Stand 2 4 m 8 ft away to scan an 20 3 cm 8 in spot on the wall Scan horizontal rows of wall from top to bottom or horizontal rows of ceiling from wall to wall Look for greatest deviations from baseline temperature to identify problems This completes the insulation test scan Turn on the blower no heat no cooling and retest If test results with the blower on are different than results with the blower off this may indicate air leaks in conditioned envelope walls The ai
23. uperheat tables or calculator Add refrigerant to reduce superheat as necessary Recover refrigerant to increase superheat Checking Subcooling on Air To Air Systems With Expansion Valve Equipped Evaporators a Ensure that filter and blower are clean and all registers are open and unobstructed Ensure that condenser is clean and dry Clean section of liquid line close to where liquid pressures can be read Attach furnished thermocouple probe to liquid line with Velcro fastener or use an 80PK 8 Pipe Clamp Temperature Probe Connect high side rating pressure gauge to liquid line Start system and allow to run at least 10 minutes to reach a steady state condition Determine condenser saturation temperature from pressure temperature chart Read the liquid line temperature in the secondary display Subtract liquid line temperature from condenser saturation temperature Correct subcooling is based primarily on equipment efficiency rating EER and pressure drop in liquid line due to friction and lift 10 Determine required subcooling from manufacturer s specification 11 Add refrigerant to increase subcooling or recover refrigerant to reduce subcooling B en 16 Infrared Thermometer Maintenance Maintenance Changing the Battery To install or change the two AA batteries open the battery compartment and insert the batteries as shown in Figure 2 Cleaning the Lens Blow off loose particles using clean comp
24. use Note Unequal temperatures or a high temperature indicates loose or corroded connection through the fuse buss spring clip Testing Electrical Connections 1 12 Press E and then press to select LO emissivity for uninsulated connectors or buss connections or HI for insulated connections Note Conductors are typically smaller than the Thermometer s spot size If the spot size is bigger than the connector the temperature reading is the average within the spot Scan the conductor moving toward direction of electrical connector quick connect wire nut buss connection or lug Infrared Thermometer Typical Measurements Testing Bearings CO NS IA 7 A Warning To avoid injury when testing bearings Do not wear loose clothing jewelry or anything around neck when working around moving parts such as motors belts blower and fans e Make sure an electrical disconnect is within reach and operating correctly and freely e Do not work alone Note It works best to compare two similar motors operating similar loads Press B and then press to select HI emissivity Press and then press 5 to select MAX Enable motor and allow it to reach steady state operating temperatures Disable the motor if possible Measure the two motor bearing temperatures Compare the two motor bearing temperatures Unequal temperatures or a high temperature can indicate a lubrication or other bearing problem that is
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