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Manual Friedrich R410A

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  • Friedrich R410A - page 1

    V( E, H )A 09 K2 5L -* V( E, H )A 09 K3 4L -* V( E, H )A 09 K5 0L -* V( E, H )A 12 K2 5L -* V( E, H )A 12 K3 4L -* V( E, H )A 12 K5 0L -* V( E, H )A 18 K2 5L -* V( E, H )A 18 K3 4L -* V (E , H) A 1 8K 5 0 L- * V( E, H )A 24 K2 5L -* V( E, H )A 24 K3 4L -* V( E, H )A 24 K5 0L -* V( E, H )A 24 K7 5L -* V( E, H )A 24 K1 0L -* VPK -Se rvM an- L ( 4-1 1 ...

  • Friedrich R410A - page 2

    1 T able of Contents 2-4 4 5 5 6 7 8 8 9 10-1 1 12 13 14 15 16 17 18 19-22 23 24 24 22-23 25 26 26 27 Important Safety Information ........................................... Introduction ......................................................................... V ert-I-Pak Model Number Identifi cation Guide ................... Serial Number Identi ...

  • Friedrich R410A - page 3

    IMPORT ANT SAFETY INFORMA TION The information contained in this manual is intended for use by a qualifi ed service technician who is familiar with the safety procedures required for installation and repair , and who is equipped with the proper tools and test instruments required to service this product. Installation or repairs made by unqualifi ...

  • Friedrich R410A - page 4

    Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel, • and sleeve on the room side of the air conditioning unit while cleaning. Electrical component malfunction caused by water could result in electric shock or other electrically • unsafe conditions when the power is restored and the unit is ...

  • Friedrich R410A - page 5

    4 PROPERTY DAMAGE HAZARDS FIRE DAMAGE HAZARDS: Read the Installation/Operation Manual for this air conditioning unit prior to operating. • Use air conditioner on a single dedicated circuit within the specifi ed amperage rating. • Connect to a properly grounded electrical circuit only . • Do not use extension cords with the unit. • Failure ...

  • Friedrich R410A - page 6

    ELE CTRIC H EA TER SIZE A- Series 00 = No ele ctric h eat 25 = 2.5 K W 34 = 3 .4 KW 50 = 5.0 K W 7 5 = 7 .5 K W 1 0 = 1 0 K W NOMINAL C AP ACITY A- Series (Btu /h) 09 = 9 ,00 0 1 2 = 1 2,00 0 1 8 = 1 8,00 0 24 = 2 4 ,00 0 L; MARKET ING SUFFI X Indicates Modificati on (subject to change) B; ENGINE ERING SUFF IX Indicates Modificati on (subject to ch ...

  • Friedrich R410A - page 7

    Wire Si ze ELECTRICAL REQUIREMENTS Uni t MUST Supply voltage For VPAK Cool with Electric Heat 9-18K ELECTRIC SHOCK HAZARD W ARNING T urn off electric power before service or instal- lation. All electrical connnections and wiring MUST be installed by a qualified electrician and conform to the National Electrical Code and all local codes which have j ...

  • Friedrich R410A - page 8

    Chassis Specifi cations Model 2011 VEA09K VEA12K VEA18K VEA24K VHA09K VHA12K VHA18K VHA24K COOLING DATA COOLING BTUh 9400/9000 11500/11200 17000/16500 23000/22700 9200/9000 11500/11200 17000/16800 23000/22800 POWER (W) 959 1173 1888 2421 939 1186 1868 2527 1 . 9 / 1 . 9 1 . 9 / 1 . 9 7 . 9 / 7 . 9 8 . 9 / 8 . 9 5 . 9 / 5 . 9 0 . 9 / 0 . 9 8 . 9 / ...

  • Friedrich R410A - page 9

    Extended Cooling Performance Data Model # Model # Cooling Performance Data TECHNICAL SERVICE DA T A V EA - EXTENDED COOLING PERFORMANC E 72 67 62 72 67 62 72 67 62 72 67 62 72 67 62 BTUh 11054 10631 9842 10528 9926 9156 10114 9400 8319 9475 8413 7417 8954 7835 6914 WATTS 783 795 804 853 861 872 959 959 959 1037 1036 1039 1084 1083 1087 AMPS 3.5 3.5 ...

  • Friedrich R410A - page 10

    ELECTR ONIC CONTROL BO ARD FEA TURES The new Friedrich V ert-I-Pak has state of the art features to improve guest comfort and conserve energy . Through the use of specifi cally designed control software, Friedrich has accomplished what other Manufacturer ’s have only attempted – a quiet, dependable, affordable and easy to use V ert-I-Pak. Belo ...

  • Friedrich R410A - page 11

    The Note: Unit is operated by a wired remote wall t-stat which is connected to an electronic control board at the VP AK unit. Heat Mode in Cool with Electric Heat Units Heat Pump With Electric Heat Operation If the Compressor is Locked Out on the 3 Minute Time Delay and Electric Heat is A vailable Condition 1 set point of the t-stat if (Compressor ...

  • Friedrich R410A - page 12

    C o m p r e s s o r L o c k O u t T i m e The loc kout feature ensures that the compre ssor is de - energized fo r a peri od of time. The timer vari es randomly from 180 to 240 seconds The c ompressor lo ckout is initiated every time t he compre ssor is “of f ” due to: ( 1 ) Sat isf ying the T-stat temper ature set point (2 ) Changing mode to f ...

  • Friedrich R410A - page 13

    ELECTRIC SHOCK HAZARD W ARNING Dis conn ect p ower t o t he unit bef ore ser vici ng. Fai lure to f oll ow th is w arni ng cou ld r esu lt in s eri ous inj ury or de ath. Lo w V o l t a g e I n t e r f a c e C o n n e c t i o n s All Vert-I-Pak unit s h ave a low volt age inter f ace c onnec tor thro ugh whic h a Remote W all Therm ostat , De sk Co ...

  • Friedrich R410A - page 14

    SER VICE CUT/SEVER HAZARD CAUTION Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in minor to moderate injury . ELECTRIC SHOCK HAZARD W ARNING Tur n of f e l e c t ri c p o we r b e fo r e s er v i c e o r installation. Extreme care must be used, if it becomes necessary to work on ...

  • Friedrich R410A - page 15

    VP AK 9-18K BTU UNITS COMPONENTS IDENTIFICA TION 14 Air Intake Ground Front Side Blower Wheel and Heater in here 10” Duct Collar Right Side Left and Front Sides Left and Back Sides Condenser Heater Diagnostic T ouch Pad Fresh Air V ent Evaporator Coil Condenser Coil Thermistor Evaporator Coil Thermistor Compressor Evaporator Coil Pullout Disconne ...

  • Friedrich R410A - page 16

    VP AK 24K BTU UNITS COMPONENTS IDENTIFICA TION 15 Front Side Left and Back Sides Right Side Air Intake Condenser Air Discharge Condenser Air Intake Pull Out Disconnect Diagnostic T ouch Pad Compressor Contactor 10” Duct Collar Air Discharge Blower Wheel Electric Control Panel Return Air Filter Fresh Air Door Lever Electronic Control Board Namepla ...

  • Friedrich R410A - page 17

    16 Error Code s and Alarm Status Unit Control Panel The display shown below has four digits. The left two digits indicate the error code # ( 1 to 24 ), The On/Off icons above these two digits indicate the currents state of the error code. The right two digits show the history count (up to 99) of the associated error code. The display contains a mai ...

  • Friedrich R410A - page 18

    17 COMPONENTS TESTING T esting the Dia gnostic Ser vice Module T esting the Electr onic Contr ol Boar d If the Diagnostic Service Module does not turn on: 1. Make sure there is 208/230 V AC to the unit and that it is turned on. 2. Disconnect the diagnostic service module’s wire harness on the control board. 3. Using a voltmeter , check the fi rs ...

  • Friedrich R410A - page 19

    ELECTRONIC CONTR OL BO AR D COMPONENTS IDENTIFICA TION AND TESTING (Continued) (See wiring diagrams pages 41-46) Front Sam pl e boa rd fo r Kuhl+ u nit Bac k VPA K 2 4K Hig h P res su re Swi tch Reversing Valve High Speed Low Speed T-stat Terminals Transformer voltage Selector Switch 115/230 Volts Ensure it is set at 230VAC Not Us ed Not Us ed Not ...

  • Friedrich R410A - page 20

    B L O W E R / F AN MOT OR TEST B L O W E R / F AN MOT OR A si n g le p ha se pe r ma n e n t sp l i t cap aci to r mo t o r is u se d to d ri v e th e ev apo ra to r bl ow e r and con de ns er fan . A sel f-r es e ttin g o v erl oa d is lo cat ed i ns id e the mo to r to pr ot e ct ag ai n st hi gh te m pe ra t ur e an d h ig h a mp er ag e co nd i ...

  • Friedrich R410A - page 21

    DRAIN P AN V AL VE During the cooling mode of operation, condensate which n a f r e s n e d n o c e h t y b p u d e k c i p s i n a p n i a r d e h t n i s t c e l l o c blade and sprayed onto the condenser coil. This assists in cooling the refrigerant plus evaporating the water . During the heating mode of operation, it is necessary that water be ...

  • Friedrich R410A - page 22

    EX AMPLE: A ir fl o w require ments are calcula ted as fol lows : (H aving a we t c oil creates additional resistance to air fl ow . This add it ional resis tance must be t ak en int o consid erat ion to obtain accurate air fl ow information. Ex ternal St atic Press ure Exte rn al Sta ti c Pre s su re can bes t be de fi n ed as th e pre ss ur e ...

  • Friedrich R410A - page 23

    The V ert-I-Pak A series units must be installed with a free return air configuration. The table below lists the indoor airflow at corresponding static pressures. All units are rarted at low speed. The V ert-I-Pak units are designed for either single speed or two fan speed operation. For single speed operation refer to the airflow table below and s ...

  • Friedrich R410A - page 24

    A good understanding of the basic operation of the refrigeration system is essential for the service technician. Without this understanding, accurate troubleshooting of refrigeration system problems will be more diffi cult and time consuming, if not (in some cases) entirely impossible. The refrigeration system uses four basic principles (laws) in ...

  • Friedrich R410A - page 25

    R efrigerant Char ging Proper refrigerant charge is essential to proper unit opera- tion. Operating a unit with an improper refrigerant charge will result in reduced performance (capacity) and/or effi ciency . Accordingly , the use of proper charging methods during ser- vicing will insure that the unit is functioning as designed and that its compr ...

  • Friedrich R410A - page 26

    3. Install a process tube to sealed system. 4. Make necessary repairs to system. 5. Evacuate system to 200 microns or less. 6. Weigh in refrigerant with the property quantity of R-410A refrigerant. 7. Start unit, and verify performance. 8. Crimp the process tube and solder the end shut. Proper safety procedures must be followed, and proper protecti ...

  • Friedrich R410A - page 27

    Ov erchar ged R efriger ant Systems After the unit has run 10 to 15 minutes, check the gauge pressures. Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures. Improper air fl ow over the evaporator coil may indicate some of the same symptoms as an over charged system. An overcharge can ...

  • Friedrich R410A - page 28

    METERING DEVICE Capillar y T ube Systems All units are equipped with capillary tube metering devices. Checking for restricted capillary tubes. 1. Connect pressure gauges to unit. 2. Start the unit in the cooling mode. If after a few minutes of operation the pressures are normal, the check valve and the cooling capillary are not restricted. 3. Switc ...

  • Friedrich R410A - page 29

    NOTE: System operating pressures must be near normal before valve can shift . REVERSING V AL VE DESCRIPTION/OPERA TION The Reversing V alve controls the direction of refrigerant fl ow to the indoor and outdoor coils. It consists of a pressure- operated, main valve and a pilot valve actuated by a solenoid plunger . The solenoid is energized during ...

  • Friedrich R410A - page 30

    Reversing V alve in Heating Mode When sluggish or stuck in the mid-position, part of the discharge gas from the compressor is directed back to the suction side, resulting in excessively high suction pressure. Should the valve fail to shift from coooling to heating, block the air fl ow through the outdoor coil and allow the discharge pressure to bu ...

  • Friedrich R410A - page 31

    8. Pressurize sealed system with a combination of R-410A and nitrogen and check for leaks, using a suitable leak detector . Recover refrigerant per EP A guidelines. 9. Once the sealed system is leak free, install solenoid coil on new valve and charge the sealed system by weighing in the proper amount and type of refrigerant as shown on rating plate ...

  • Friedrich R410A - page 32

    Remove the leads from the compressor terminals and set the ohmmeter on the lowest scale (R x 1). T ouch the leads of the ohmmeter from terminals common to start (“C” to “S”). Next, touch the leads of the ohmmeter from terminals common to run (“C” to “R”). Single Phase Resistance T est Add values “C” to “S” and “C” to “ ...

  • Friedrich R410A - page 33

    R ecommended procedur e for compressor replacement 1. Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing. 2. Recover all refrigerant from the system though the process tubes. PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EP A REGULA TIONS IS REQUIRED. Do no ...

  • Friedrich R410A - page 34

    1. 2. 3. 4. 5. ELECTRIC SHOCK HAZARD W ARNING T urn off electric power before service or installation. Failure to do so may result in personal injury , or death. S e a l ed R e f r ig er at io n Sy st em c o nt ai ns r e f r ig er an t a n d oi l un de r hi g h p r e s su re . Proper safety procedures must be followed, and proper protective clothin ...

  • Friedrich R410A - page 35

    ROOM AIR CON DITIONER U NIT PERFORMA NCE TEST DATA SHEET JOB NAME___ ____________ ________________ _ TECHS NAME____ _________________ _______________ DATE: _____ __________ MODEL:__ _______ ______ SERIAL:___ _____________ HOW IS ALL O F THE INSTA LLATION? GOOD BAD YES NO I S T H E U N I T I N S T A L L E D 2 3 / 8 ” I N T O T H E P L E N U M ? I ...

  • Friedrich R410A - page 36

    THERMIST ORS’ RESIST ANCE V ALUES (This T able Applies to All Thermistors ) 7(03 FAHRENHEIT 5(6,67$1& (.2KPV  5(6,67$ 1&( 72/(5$1& (          ? ...

  • Friedrich R410A - page 37

    ELECTRICAL TR OUBLESHOO TING CHART - COOLING 9K BTU , 12K BTU , & 18K BTU NO COOLING OPERATION Insure that Fuses are good and/or that Circuit Breakers are on and voltage is 208/230 Compressor and Fan Motor should now operate See Refrigerant Circuit diagnosis if unit still is not cooling properly Fan runs but Compressor doesn't Compressor r ...

  • Friedrich R410A - page 38

    ELECTRICAL TR OUBLESHOO TING CHART - COOLING 24K BTU Y es No 24V at t-stat and control wiring? Y es No 24V at t-stat and control wiring? NO COOLING OPERATION Before continuing check for Error Codes, see electronics control diagnostics on page 16 Y es Y es Compressor outdoor fan motor and indoor blower should now operate See Refrigerant Circuit diag ...

  • Friedrich R410A - page 39

    ELECTRICAL TR OUBLESHOO TING CHART HEA T PUMP Replace Reversing V alve NO NO YES YES Reversing V alve Stuck YES Replace Solenoid Coil Is the Solenoid Coil Good? Is Line V oltage Present at Solenoid V alve? Is Selector Switch set for Heat? SYSTEM COOLS WHEN HEA TING IS DESIRED. HEA T PUMP MODE 38 ...

  • Friedrich R410A - page 40

    REFRIGERANT SYSTEM DIAGNOSIS COOLING REFRIGERANT SYSTEM DIAGNOSIS HEA TING Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions Low Air Flow Across High Air Flow Across Refr igerant System Low Air Flo w Across Indoor Coil Indoor Coil Restriction Outdoor Coil Refr igerant System Rev ersing V alve not Rev ersing V alve no ...

  • Friedrich R410A - page 41

    REMO TE WALL THERMOST A T WIRING DIAGRAMS LEGEND FOR A T WIRING HARNESS RT6 - T wo Speeds F an T -Stat - F ield Provided -- -- -- F ield Wiring C Common T erminal GH Call for High F an GL Call for Low F an O/B Reversing V alve - Congurable O Cool mode, active reversing valve B Heat mode, active reversing valve for VPAK heat pump unit Y C oil for ...

  • Friedrich R410A - page 42

    COOL WITH ELECTRIC HEA T ELECTRICAL & THERMOST A T WIRING DIAGRAM VEA 09/12/18 with 2.5 KW , 3.4 KW or 5KW ELECTRIC HEA T 41 B L U E RED WHITE GREEN BROWN ORANGE C H E R M F A N L1 L2 ELECTRONIC CONTROL TERMINAL DETAIL BLACK B L A C K BLUE HEATER 2.5 KW & 3.5 KW 5.0 KW BLACK (TO L1) RED QUICK DISCONNE CT CAPACITOR BLOWER MOTOR TO MOTOR MOUN ...

  • Friedrich R410A - page 43

    HEA T PUMP WITH ELECTRIC HEA T ELECTRICAL & THERMOST A T WIRING DIAGRAM VHA 09/12/18 with 2.5 KW , 3.4 KW or 5KW ELECTRIC HEA T 42 B L U E RED WHITE BLACK GREEN BROWN ORANGE C H ER M F A N L1 L2 ELECTRONIC CONTROL TERMINAL DETAIL BLACK B L A C K BLUE HEATER 2.5 KW & 3.5 KW 5.0 KW BLACK (TO L1) B L A C K RED QUICK DISCONNE CT REVE RSING VAL ...

  • Friedrich R410A - page 44

    COOL WITH ELECTRIC HEA T ELECTRICAL & THERMOST A T WIRING DIAGRAM VEA 24 with 2.5 KW , 3.4 KW or 5KW ELECTRIC HEA T 43 WHITE WHITE WHITE BLUE RED WHITE R E D WHITE GREEN BROWN ORANGE BROWN C GREEN F A N H E R M BLACK L1 L2 C ELECTRONIC CONTROL H E RM F A N TERMINAL DETA IL BLACK B L U E B L U E B L A C K B L A C K BLUE HEATER 2.5 KW & 3.5 K ...

  • Friedrich R410A - page 45

    44 WHITE WHITE WHITE BLUE RED WHITE R E D WHITE GREEN BROWN ORANGE BROWN C GREEN F A N H E R M BLACK L1 L2 C ELECTRONIC CONTROL H E R M F A N TERMINAL DETA IL BLACK B L U E B L U E B L A C K B L A C K BLUE HEATER 7.5 KW or 10.0 KW BLACK (TO L1) RED PRESSURE SWITCH COMPRESSOR CONTACTOR QUICK DISCONNECT TO MOTOR MOUNT FAN MOTOR CAPACITOR BLOWER MOTOR ...

  • Friedrich R410A - page 46

    45 WHITE WHITE WHITE BLUE RED WHITE R E D WHITE BLACK GREEN BROWN ORANGE BROWN C GREEN F A N H E R M BLACK L1 L2 C ELECTRONIC CONTROL H E R M F A N TERMINAL DETAI L BLACK BLUE B L U E BLACK BLACK BLUE HEATER 2.5 KW & 3.5 KW 5.0 KW BLACK (TO L1) BLACK RED PRESSURE SWITCH COMPRESSO R CONTACTOR QUICK DISCON NECT REVE RS IN G VA LV E SOLENOID COIL ...

  • Friedrich R410A - page 47

    HEA T PUMP WITH ELECTRIC HEA T ELECTRICAL & THERMOST A T WIRING DIAGRAM VHA 24 with 7.5 KW and 10KW ELECTRIC HEA T 46 WHITE WHITE WHITE BLUE RED WHITE R E D WHITE BLACK GREEN BROWN ORANGE BROWN C GREEN F A N H E R M BLACK L1 L2 C ELECTRONIC CONTROL H E R M F A N TERMINAL DETA IL BLACK BLUE B L U E BLACK BLACK BLUE HEATER 7.5 KW OR 10 KW BLACK ( ...

  • Friedrich R410A - page 48

    Accessories M O D E L D E S C R I P T I O N P H O T O VPA WP1-8 VP DP1 VP RG4 R T4 R T6 VP SC2 VPAL 2 VPAWP1 - 14 3 / 4 " high x 27" wide. W ALL PLENUM T wo-part sleeve that telescopes in and out from 5 to 8 in depth. The wall plenum sits inside the exterior wall penetration. DIMENSIONS: 30 high x 24 wide CUTOUT DIMENSIONS: 30 high x 24 w ...

  • Friedrich R410A - page 49

    (10-06) Friedrich Air Conditioning Company VERT -I-P AK ® A SERIES SI NG LE P ACK AG E VER TI CA L AIR C ON DI TI ONE RS LI MIT ED W AR RA NT Y SA VE T HI S CE RT IF IC A TE. I t giv es yo u sp ec if ic r i gh ts , you m ay al so hav e oth er rig hts whi ch may va ry fro m s ta te to sta te an d pr ov in ce t o pr ov in ce . In t he e ve n t th at ...

  • Friedrich R410A - page 50

    8 1 9 10 11 2 7 4 5 6 3 2011 VP AK 9K-18K BTU/h Models 49 ...

  • Friedrich R410A - page 51

    17 16 12 15 13 14 2011 VP AK 9K-18K BTU/h Models 50 ...

  • Friedrich R410A - page 52

    24 26 25 28 27 23 16 2011 VP AK 9K-18K BTU/h Models 51 ...

  • Friedrich R410A - page 53

    20 21 22 18 19 2011 VP AK 9K-18K BTU/h Models 52 ...

  • Friedrich R410A - page 54

    Reference Number Part Number Part Desc rip  on VEA09K25RTL-B VEA09K34RTL-B VEA09K50RTL-B VEA12K25RTL-B VEA12K34RTL-B VEA12K50RTL-B VEA18K25RTL-B VEA18K34RTL-B VEA18K50RTL-B VHA09K25RTL-B VHA09K34RTL-B VHA09K50RTL-B VHA12K25RTL-B VHA12K34RTL-B VHA12K50RTL-B VHA18K25RTL-B VHA18K34RTL-B VHA18K50RTL-B 1 8007 4936 COMPRESSOR KIT 1 1 1 1 8007 4939 COM ...

  • Friedrich R410A - page 55

    8 9 4 2 1 6 7 5 3 2011 VP AK 24K BTU/h Models 54 ...

  • Friedrich R410A - page 56

    18 17 16 10 14 15 23 12 13 22 21 6 20 19 11 2011 VP AK 24K BTU/h Models 55 ...

  • Friedrich R410A - page 57

    25 14 29 30 24 26 28 2011 VP AK 24K BTU/h Models 56 ...

  • Friedrich R410A - page 58

    33 32 31 2011 VP AK 24K BTU/h Models 57 ...

  • Friedrich R410A - page 59

    Reference Number Part Number Part D escrip  on VEA24K10RTL-B VEA24K25RTL-B VEA24K34RTL-B VEA24K50RTL-B VEA24K75RTL-B VHA24K10RTL-B VHA24K25RTL-B VHA24K34RTL-B VHA24K50RTL-B VHA24K75RTL-B 1 80077118 COMP RESSOR KIT 1 1 1 1 1 1 1 1 1 1 2 80103450 COIL, EVAPORATOR 1 1 1 1 1 1 1 1 1 1 3 80101261 COIL, CONDENSER 1 1 1 1 1 3 80101260 COIL, CONDENSER 1 ...

  • Friedrich R410A - page 60

    Printed in the U.S.A. VPK-ServMan-L (4-1 1) 59 FRIEDRICH AIR CONDITIONING CO. 10001 Reunion Place, Ste. 500, San Antonio, TX 78216 (210) 546-0500 877-599-5665 x 261 F AX (210) 546-0631 Email: tac@friedrich.com www .friedrich.com Printed in the U.S.A. TECHNICAL SUPPORT CONT ACT INFORMA TION FRIEDRICH AUTHORIZED P ARTS DEPOTS AAA Refrigeration Servic ...

  • Friedrich R410A - page 61

    FRIEDRICH AIR CONDITIONING CO. 10001 Reunion Place, Ste. 500, San Antonio, TX 78216 P 210-546-0500 | F 210-546-0731 www .friedrich.com Printed in the U.S.A. VPK-ServMan-L (4-1 1) ...

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All of them are important, but the most important information from the point of view of use of the device are in the user manual Friedrich R410A.

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A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Friedrich R410A by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Friedrich R410A.

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5. FAQ - Frequently Asked Questions
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