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Friedrich H)A09K25 manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    VPSERVMN (4-05) MODELS V(E,H)A09K25*** V(E,H)A09K34*** V(E,H)A09K50*** V(E,H)A12K25*** V(E,H)A12K34*** V(E,H)A12K50*** V(E,H)A18K25*** V(E,H)A18K34*** V(E,H)A18K25*** V(E,H)A24K25*** V(E,H)A24K34*** V(E,H)A24K50*** V(E,H)A24K75*** V(E,H)A24K10*** V(E,H)A24K00*** Ser vic e Manual Single Package V er tical Air Conditioning Sys tem A – H Suf fi x M[...]

  • Page 2

    2 T able of Contents Intro ducti on ...................................................................... 3 V er t- I - Pak Mo del Numb er Identi fi catio n Guide .............. 4 Ser ial Numb er Ident ifi cati on Guide ................................. 4 H Suf fi x Chassis Sp eci fi cat ions ...................................... 5 E and G Su[...]

  • Page 3

    3 Introduction This service manual is designed to be used in conjunction with the installation manuals provided with each air conditioning system component. Air conditioning systems consist of BOTH an evaporator (indoor section) and a condenser (outdoor section) in one closed system, and a room thermostat. When so equipped, accessories such as elec[...]

  • Page 4

    4 PRODUCT LINE R = RAC P = PT AC E = EAC V = VP AK H = SPLIT SERIAL NUMBER Decade Manufactured J = 9 K = Not Used L = 0 MONTH MANUF ACTURED A = Jan D = Apr G = Jul K = Oct B = Feb E = May H = Aug L = Nov C = Mar F = Jun J = Sep M = Dec YEAR MANUF ACTURED A = 1 E = 5 J = 9 B = 2 F = 6 K = 0 C = 3 G = 7 D = 4 H = 8 ELEC TRIC HEA TER SIZE A- Ser ies 0[...]

  • Page 5

    5 VEA/ VHA9K -2 4K VEA09K VEA12K VEA18K VEA24K VHA09K VHA12K VHA18K VHA24K COOLING DA TA Cooling Btu/h 95 00 /9 30 0 1 1 80 0 /1150 0 18000/17800 24000 9500/9300 1 1800/1 1500 18000/17800 23500 Cooling Power (W) 8 80 10 93 20 70 25 26 90 5 1 1 2 4 20 70 24 74 EE R 10.8 10.8 8.7 9.5 10.5 10.5 8.7 9.5 Sensible Heat Ratio 0. 74 0. 72 0. 70 0 .7 0 0 .7[...]

  • Page 6

    6 Mode l V(E,H)A 09 V(E,H)A 1 2 V(E,H)A 18 V(E,H)A24 Vo l t ag e ( V ) 23 0 / 208 23 0 / 208 23 0 / 208 23 0 / 208 Refri gera nt R- 22 R-22 R -22 R -22 Chassi s Width 23. 125" 23. 125" 23. 1 25" 23. 125" Chas si s Dep th 23. 125" 23. 12 5" 23. 125" 23. 125" Chas si s He igh t ** 32 .25" 3 2.25" 3 2.[...]

  • Page 7

    7 * Height includes 2" high duct collar and 5/8" isolators under unit. **Normal V alue Dry Coil on High Speed @ .3" ESP . MODELS V(E,H)A09 K25 V(E,H)A09 K34 V(E,H)A09 K50 V(E,H)A12 K25 V(E,H)A12 K34 V(E,H)A12 K50 V(E,H)A18 K25 V(E,H)A18 K34 V(E,H)A18 K50 Cooling Cap. (Btu/h) 950 0/9300 9500/930 0 9500/930 0 11500/11300 11500/11300 11[...]

  • Page 8

    8 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) i[...]

  • Page 9

    9 Electrical Rating T ables NOTE: Use copper conductors ONL Y Wire sizes are per NEC . Check local codes for overseas applications Recommended branch circuit wire sizes* Nameplate maximum circuit breaker size A WG Wire size** 15A 14 20A 12 30A 10 A WG — American Wire Gauge * Single circuit from main box ** Based on copper wire, single insulated c[...]

  • Page 10

    10 Heat Anticipators Heat anticipators are small resistance heaters (wired in series with the "W" circuit) and built into most electromechanical thermostats. Their purpose is to prevent wide swings in room temperature during system operation in the HEA TING mode. Since they are wired in series, the "W" circuit will open if one b[...]

  • Page 11

    11 T ypical Electr ical & Thermostat Wir ing Diagrams VEA / VHA 24K L1 L2 QUICK DISCONNECT HERM BLUE YELLOW GREEN WHITE RED CAPACITOR BROWN GREEN BROWN COMP WIRE HARNESS COMPRESSOR RED BLUE BLACK RED FAN c BLACK BLUE WHITE TRANSFORMER WHITE BLACK BLACK COIL, SOLENOID WIRE NUT (RED) SEE NOTE #4 CAPACITOR GREEN MOTOR CONDENSER MOUNT TO MOTOR FAN [...]

  • Page 12

    12 T ypical Electrical & Thermostat Wiring Diagrams G & H Suffi x N OT E: THE DIAGRAM ABOVE ILLUSTRA TES THE TYPICAL THERMOST A T WIRING AND 208 VOL T TRANSFORMER WIRING. SEE THE UNIT CONTROL P ANEL FOR THE ACTUAL UNIT WIRING DIAGRAM AND SCHEMA TIC. COM. 208V 240V RT1 THERMOST A T (FRONT)[...]

  • Page 13

    13 T ypical Electrical & Thermostat Wiring Diagrams A – E Suffi x FOR 208 VOL T MODELS ONL Y : MOVE THE WHITE WIRE AS SHOWN BELOW .[...]

  • Page 14

    14 Indoor Blower - Air fl ow The cur rent V er t- I - Pak 9, 1 2, & 18 use a dual shaft, per manent split capaci tor , single speed motor to dr ive indoor blower and outdoor fan. Earlier model V ERT - I - Pak units used 2- speed motors. The V er t- I - Pak 24 uses an individual , single shaf t , permanent split c apacitor , single spee d motor[...]

  • Page 15

    15 Checking External St atic Press ure The air f low through t he unit can be determine d by measuring the ex ternal static pres sure of the system, and consult ing the blower per formanc e data for the spec ifi c VER T - I- P A K. 1 . Set up to measure external st atic pressure at the supply and return air . 2. Drill hole s in the supply duct for[...]

  • Page 16

    16 Ductwork Preparation Pull the fl ex duct tight. Extra fl ex duct slack can greatly increase static pressure Explanation of charts Chart A is the nominal dry coil VERT -I-P AK CFMs. Chart B is the correction factors beyond nominal conditions. Refrigerant Charging Note : Be cause the e arli er mod el Ver t- I - Paks a re seale d systems, ser vic[...]

  • Page 17

    17 Method Of Charging The acceptable method for charging the V ert-I-Pak system is the Weighed in Charge Method. The weighed in charge method is applicable to all units. It is the preferred method to use, as it is the most accurate. The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair , comp[...]

  • Page 18

    18 Overcharged Refrigerant Systems Compressor amps will be near normal or higher . Noncondensables can also cause these symptoms. T o confi rm, remove some of the charge, if conditions improve, system may be overcharged. If conditions don’t improve, Noncondensables are indicated. Whenever an overcharged system is indi cated, always make sure tha[...]

  • Page 19

    19 All units are e quipped with c apillar y 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. The Reversing V alve controls the direction[...]

  • Page 20

    20 Touch Test in Heating/Cooling Cycle The only defi nite indications t hat the slide is in the mid- po - sition is if all three tubes on the suc tion side of the valve are hot af ter a few minutes of running time. NOTE: A condit ion other than those illustrated above, and on page 1 9, indic ate that the rev ersing valve is not shifting properly .[...]

  • Page 21

    21 WARNING DANGER OF BODIL Y INJUR Y OR DEA TH FROM ELECTRICAL SHOCK When working on high voltage equipment - turn the electrical power off before attaching test leads. Use test leads with alligator type clips - clip to terminals, turn power on, take reading - turn power off before removing leads. Compressor Checks Locked Rotor V oltage (L.R.V .) T[...]

  • Page 22

    22 Single Phase Resistance T est Remov e t he leads from the c ompressor ter minals and set the ohmmeter on the lowest scale ( R x 1 ). T ouch the leads of the ohmmeter from ter minals co mmon to star t ( " C " to "S " ). N ext, touch the leads of the ohmmeter from terminals c ommon to run ( " C " to "R " ). [...]

  • Page 23

    23 F r om the supply line on a t ypical 23 0 volt circuit, a 1 15 v o lt potential exists from the " R " terminal to ground through a possible shor t in t he capacitor . However , from the " S " or star t ter minal, a much higher potential, possibly as high as 40 0 volts, exists bec ause of the counter EM F generated in the star[...]

  • Page 24

    24 Emergency Heat Switch ( D efrost Thermost at) Continuit y C h eck Electric Heat Switch Operation (Heat Pumps Only) The electric heat switch is a dual function control and is shown on the wiring diagram as a defrost thermostat. It may be adjusted using a screwdriver . As the control shaft is rotated counter clockwise a detent will be encountered.[...]

  • Page 25

    25 VEA09K00 RT A ................... 80 0 0 491 0 ................... 28 VE A0 9 K00 RTB ................. 80 0 0 491 0 ................... 28 VE A0 9 K00 RTE ................. 80 0 0 491 0 ................... 28 VE A0 9 K00 RTG ................. 80 0 0 49 22 ................... 3 4 VE A0 9 K00 RTH ................. 80 0 04 922 ................... [...]

  • Page 26

    26 VE A 18K50 RTG ................. 8 0 0 0 492 0 ................... 32 VEA 1 8K50R TH .................. 8 0 0 0 4920 ................... 32 VE A 24K0 0RTH ................. 801 1050 0 .................... 37 VE A 24K 10RTH ................. 801 0 88 0 0 ................... 38 VE A 24K 25 RTH ................. 801 08 8 0 0 ................... 3 8[...]

  • Page 27

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  • Page 39

    39 9 - 1 8 ELECTRICAL TROUBL ESHOOTING CHART — COOLING Line V oltage available at fan speed switch (on models so equipped) NO COOLING Insure that Fuses are good and/or that Circuit Breakers are On Compressor and Fan Motor should now operate See Refrigerant Circuit diagnosis if unit still is not cooling properly Fan runs but Compressor doesn'[...]

  • Page 40

    40 2- TON ELECTRIC AL TROUBLESHOOTING CHART — Cooling Line V oltage available at fan speed switch (on models so equipped) NO COOLING Insure that Fuses are good and/or that Circuit Breakers are On Compressor outdoor fan motor and indoor blower should now operate See Refrigerant Circuit diagnosis if unit still is not cooling properly Indoor blower [...]

  • Page 41

    41 REFRIGERANT SYSTEM DIAGNOSIS COOLING TROUBLESHOOTING CHART — COOLING TROUBLESHOOTING CHART — HEA TING REFRIGERANT SYSTEM DIAGNOSIS HEA TING Low Suction Pressure High Suction Pressure Low Head Pressure High Head Pressure Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions Low Air Flow Across High Air Flow Across [...]

  • Page 42

    42 Replace Reversing V alve NO NO YES YES ELECTRICAL TROUBLESHOOTING CHART HEA T PUMP 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[...]

  • Page 43

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  • Page 44

    VPSERVMN (4-05) Use Factory Certifi ed Parts. FRIEDRICH AIR CONDITIONING CO. P ost Office Box 1540 · San Antonio, T exas 78295-1540 4200 N. P an Am Expressway · San Antonio, T exas 78218-5212 (210) 357-4400 · F AX (210) 357-4480 www .friedrich.com Printed in the U.S.A.[...]