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27

COMPRESSOR VFD

The 48/50JC units are equipped with a variable speed compressor.

To control this compressor a Variable Frequency Drive (VFD) is

required. This VFD does not look like the typical VFD the indus

-

try might be used to. This VFD is not packaged into its own hous

-

ing to appear as a single component, it is comprised of five elec

-

tronic components mounted in the unit’s control box. See Fig. 49.

for the Control box layout. The five components are: The main

drive  board,  filter  board,  capacitor  board,  choke,  and  converter

board. On 575 volt units the filter board and capacitor board are

replaced with three-phase line reactor.

Drive Board

The drive board is the heart of the VFD. It contains the safety logic

and  the  power  conversations  needed  for  the  variable  speed

operation. This drive board will take in the 60 Hz supply voltage

and modify it to drive the speed of the compressor, this is done

with  voltage  and  frequency. The  drive  board  is  responsible  for

monitoring the safety high pressure switch (HPS) and ensure the

compressor is immediately turned off upon HPS trip. There is a

discharge line thermistor (DLT) also provided that the drive board

monitors. This is for situations where there are high line tempera

-

tures  without  the  pressure  being  high  enough  to  indicate  a

problem. The  drive board has  built in logic independent of the

SystemVu logic to fold back the speed of the compressor in the

event of a high current or high temperature situation. This high

current is determine based on the speed ranges, so not just one

current  limit.  The  drive  board  has  its  own  built  in  startup  and

speed ramp protections, however these are smaller than what the

SystemVu controller uses. Review the Compressor Control sec

-

tion for SystemVu controller start and ramp functions found in the

48/50JC 04-06 Ultra High Efficiency Single Package Rooftop

Units with SystemVu™ Controls Version X.X Controls, Start-

up, Operation and Troubleshooting Instructions manual. There

is a heat sink mounted on the back of this drive board to help cool

the electronics. The drive board only communicates via Modbus

and has local LEDs to show status and errors. The converter board

will be used as the primary interface to this drive board, so refer to

that section for more details. See Fig. 50 and Table on page 28

for more details on the drive board.

Fig. 49 — 

Control Box Layout

CAUTION

UNIT DAMAGE HAZARD

Do not bypass the Drive board and pass the standard power

supply to the compressor, damage may occur.

CAUTION

UNIT DAMAGE HAZARD

If replacing the Drive board remove the whole assembly (heat

sink  and  electronic  board  together).  Never  separate  this

assembly on the replacement part.

RS485

SENSOR

HPS

W

V

U

L1

L2

L3

GRN

DC- OUT

DC

OUT

BD

470

C JG

BD

470

C JG

BD

100

V J

G

BD

100

V J

G

BD

100

V J

G

BD

100

V J

G

BD

100

V J

G

BD

100

V J

G

BD

100

V J

G

HP

220

EJG

HP

220

EJG

DC- IN

DC

+

 IN

W

arning Label

Model Label

SN Label

9D VZH 22 100V

Converter

Board

SystemVu Controller

TB4

PMR

Power

Supply

CCHR

IDMR

Capacitor

Board

Filter Board

Drive Board

Choke

Содержание 50JC04-06

Страница 1: ...nstallation of Return Air Smoke Detector 20 FIOP Smoke Detector Wiring and Response 21 SENSOR AND CONTROLLER TESTS 22 Sensor Alarm Test 22 Controller Alarm Test 22 Dirty Controller Test 22 Dirty Senso...

Страница 2: ...ON HAZARD Failure to follow this warning could result in personal injury or death Before performing service or maintenance operations on unit LOCKOUT TAGOUT the main power switch to unit Electrical sh...

Страница 3: ...l need to be periodically replaced or cleaned Filters RETURN AIR FILTERS Return air filters are disposable fiberglass media type Access to the filters is through the small lift out panel located on th...

Страница 4: ...temVu controls The Fan Speed settings are accessed through the SystemVu interface 1 Check the job specifications for the CFM cubic feet per minute and ESP external static pressure required 2 Using the...

Страница 5: ...6 Ultra High Efficiency Single Package Rooftop Units with SystemVu Controls Version X X Controls Start up Operation and Trouble shooting Instructions NOTE Values in the Field Accessories section are V...

Страница 6: ...trol Wiring Diagram Removing the Motor and Fan Assembly NOTE Due to press fit design of composite Rotor on Motor it is highly recommended that any time a motor is replaced the fan rotor is replaced as...

Страница 7: ...otor wire harness into keyhole feature on the side of the stator and pull wire harness out through grommet 8 Install rotor on motor by lining up one of 9 holes on com posite rotor with one of 9 holes...

Страница 8: ...fibers must be completely removed prior to using low velocity clean water rinse PERIODIC CLEAN WATER RINSE A periodic clean water rinse is very beneficial for coils that are applied in coastal or indu...

Страница 9: ...ipment to flush down between the 2 coil sections to remove dirt and debris If a coil cleaner is used be sure to rinse the coils completely before reassembly 11 Move the inner coil back into position R...

Страница 10: ...tered through the valve seat is de pendent upon the following 1 Superheat temperature is sensed by cap tube sensing bulb on suction tube at outlet of evaporator coil This tempera ture is converted int...

Страница 11: ...e entire core body if neces sary Service tools are available from RCD that allow the re placement of the check valve core without having to recover the entire system refrigerant charge Apply compresso...

Страница 12: ...ally used Charts are based on charging the units to the correct sub cooling for the various operating conditions Accurate pressure gage and temperature sensing device are required Connect the pressure...

Страница 13: ...gerant Charging Chart Unit must be put in Test Mode and set the Humidimizer test compressor speed to 4500 Remove Charge if Below the Curve 48TC004273 REV Add Charge if Above the Curve Outdoor Coil Lea...

Страница 14: ...stops on the fan shaft 5 Tighten set screw to 60 in lb 6 78 Nm 6 Replace condenser fan assembly When replacing the con denser fan assembly follow the screw pattern sequence shown in Fig 26 The screws...

Страница 15: ...reset Defective run start capacitor overload start relay Determine cause Replace compressor or allow enough time for internal overload to cool and reset One leg of 3 phase power dead Replace fuse or...

Страница 16: ...owered from a source elsewhere in the Excessive Head Pressure Dirty outside Replace filter Dirty outdoor coil cooling Clean coil Refrigerant overcharged Recover excess refrigerant Air in system Recove...

Страница 17: ...to clear the tripped condition Fuse on Powered Type The factory fuse is a Bussmann Fusetron1 T 15 non renewable screw in Edison base type plug fuse USING UNIT MOUNTED CONVENIENCE OUTLETS Units with u...

Страница 18: ...ach heater module See Fig 34 These are accessed through the indoor access pan el Remove the switch by removing two screws into the base plate and extracting the existing switch Fan stator manual reset...

Страница 19: ...tor Sensor Air is introduced to the duct smoke detector sensor s sensing chamber through a sampling tube that extends into the HVAC duct and is directed back into the ventilation system through a shor...

Страница 20: ...on Installation requires the sensor be relocated to its operating location and the tubing to the sampling tube be connected See installation steps below Completing Installation of Return Air Smoke Det...

Страница 21: ...n is detected See Fig 43 Smoke Detector Wiring HIGHLIGHT A Smoke detector NC contact set will open on smoke alarm con dition de energizing the ORN conductor USING REMOTE LOGIC Six conductors are provi...

Страница 22: ...et then holding it against the sensor housing again until the sensor s Alarm LED turns off approximately 2 seconds Remote Station Test The remote station alarm test checks a test reset station s abili...

Страница 23: ...amount of smoke particulate in the sensor s sensing chamber exceeds the alarm threshold value See Table 4 Upon entering the alarm state The sensor s Alarm LED and the controller s Alarm LED turn on T...

Страница 24: ...r If wiring is loose or missing repair or replace as required CONTROLLER S POWER LED IS OFF 1 Make sure the circuit supplying power to the controller is operational If not make sure JP2 and JP3 are se...

Страница 25: ...o quickly select from 7 main menu items An expanded readout provides detailed explanations of control information Only six buttons are required to maneuver through the entire controls menu The display...

Страница 26: ...26 Fig 48 Locations of Air Temperature Sensors RETURN AIR TEMPERATURE RAT SENSOR OUTDOOR AIR TEMPERATURE OAT SENSOR SUPPLY AIR TEMPERATURE SAT SENSOR DETAIL A SEE DETAIL A...

Страница 27: ...t of a high current or high temperature situation This high current is determine based on the speed ranges so not just one current limit The drive board has its own built in startup and speed ramp pro...

Страница 28: ...converter board or drive board Use the con verter board error code table Table 9 for troubleshooting If the drive board is folding back the speed to protect the current the run ning RPM will alternate...

Страница 29: ...1 SWITCH 2 SWITCH 3 SWITCH 4 04 3Ton 3 3 1 1 05 4Ton 3 4 1 1 06 5Ton 3 5 5 1 Table 8 Converter Board Foldback Codes FOLDBACK CODE FOLDBACK DESCRIPTION Sd01 Configuration Status EEPROM FLASH Sd02 Speed...

Страница 30: ...5 below the specified voltage for the drive 2 Check the DC bus voltage if it is 385VDC 3 Check the compressor is operating within the specified limits 4 If the problem still persists then it is possib...

Страница 31: ...mpressor is operating within specified limits 3 Check the mounting screws on the drive make sure they are tight 4 If the problem still persists replace the drive E 31 Comms to DSP Communication Lost R...

Страница 32: ...rive are possibly defective If problem persists replace the drive E 62 Stator Heater Overcurrent Reg 83 85 Bit13 Compress windings are drawing more current than expected in stator heater mode If probl...

Страница 33: ...g out of the board See Fig 52 and Table 10 for more details on the filter board Fig 52 Filter Board Table 10 Filter Board Inputs Outputs TERMINAL LABEL DESCRIPTION TYPE CONNECTOR L1_IN L2_IN L3_IN Sup...

Страница 34: ...they are the same CHOKE The choke is the heaviest component and used to protect the DC bus from voltage spikes This is wired between the DC output of the drive board and the DC input to the capacitor...

Страница 35: ...r accuracy etc will have a label on the economizer Any economizer without this label does not meet California s Title 24 The five year limited parts warranty referred to in section 140 4 only applies...

Страница 36: ...Controls Start up Operation and Troubleshooting Instructions manual for the specific DDC In spect the SAT sensor for relocation as intended during installa tion Inspect special wiring as directed belo...

Страница 37: ...irst stage of thermostat energizes the first stage of the electric heaters Second stage of thermostat energizes the second stage of electric heaters if installed Check heating effects at air supply gr...

Страница 38: ...Cu Cu Cu Cu Louvered Hail Guard Voltage 1 575 3 60 5 208 230 3 60 6 460 3 60 Design Revision Factory Design Revision Base Unit Controls 3 SystemVu Controls Standard all units Air Intake Exhaust Option...

Страница 39: ...1 17 2 17 2 17 Total Face Area ft2 5 5 5 5 5 5 EVAPORATOR FAN AND MOTOR Standard Static 3 Phase Motor Qty Drive Type 1 Direct 1 Direct 1 Direct 1 Direct 1 Direct 1 Direct Max Cont BHP 0 44 0 44 0 72 0...

Страница 40: ...motor drive recommenda tions In cases when two motor drive combinations would work the lower horsepower option is recommended 6 The EPACT Energy Policy Act of 1992 regulates energy requirements for s...

Страница 41: ...68 2253 0 80 2362 0 92 2466 1 04 1125 2051 0 60 2172 0 71 2286 0 83 2395 0 96 1200 2088 0 63 2208 0 75 2321 0 87 2428 1 00 1275 2127 0 67 2245 0 79 2357 0 91 2463 1 04 1350 2167 0 71 2283 0 83 2394 0...

Страница 42: ...2190 RPM 50JC 04 THREE PHASE HIGH STATIC 3 TON VERTICAL SUPPLY RPM VDC CFM AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 RPM Vdc RPM Vdc RPM Vdc RPM Vdc RPM Vdc 900 1092 4 4 1317 5 3 1...

Страница 43: ...2336 1 35 2430 1 52 1500 2080 0 95 2185 1 10 2285 1 26 2381 1 43 2473 1 60 1600 2131 1 02 2236 1 18 2334 1 34 2428 1 51 2519 1 69 1700 2185 1 10 2287 1 26 2385 1 43 2477 1 60 2566 1 78 1800 2239 1 19...

Страница 44: ...L SUPPLY RPM VDC CFM AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 RPM Vdc RPM Vdc RPM Vdc RPM Vdc RPM Vdc 1200 1190 4 5 1383 5 2 1544 5 8 1685 6 3 1814 6 8 1300 1255 4 7 1441 5 4 1599...

Страница 45: ...0 1 48 2502 1 65 2590 1 84 1875 2280 1 25 2381 1 43 2476 1 60 2566 1 78 2653 1 97 2000 2351 1 37 2449 1 55 2543 1 74 2632 1 93 2717 2 12 2125 2422 1 50 2519 1 69 2611 1 88 2699 2 08 2783 2 28 2250 249...

Страница 46: ...TATIC 5 TON VERTICAL SUPPLY RPM VDC CFM AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 RPM Vdc RPM Vdc RPM Vdc RPM Vdc RPM Vdc 1500 1387 4 9 1561 5 5 1711 6 0 1845 6 5 1967 6 9 1625 1473...

Страница 47: ...346 0 90 2450 1 02 1125 2030 0 58 2154 0 70 2269 0 81 2377 0 94 2480 1 06 1200 2064 0 61 2186 0 73 2301 0 85 2409 0 97 1275 2099 0 64 2220 0 76 2333 0 88 2441 1 01 1350 2134 0 68 2254 0 80 2367 0 92 2...

Страница 48: ...2190 RPM 50JC 04 THREE PHASE HIGH STATIC 3 TON HORIZONTAL SUPPLY RPM VDC CFM AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 RPM Vdc RPM Vdc RPM Vdc RPM Vdc RPM Vdc 900 1060 4 3 1292 5 2...

Страница 49: ...36 0 89 2143 1 04 2245 1 20 2342 1 36 2435 1 53 1600 2084 0 96 2190 1 11 2290 1 27 2385 1 44 2477 1 61 1700 2132 1 02 2237 1 18 2336 1 35 2430 1 52 2520 1 69 1800 2182 1 10 2285 1 26 2383 1 43 2476 1...

Страница 50: ...N HORIZONTAL SUPPLY RPM VDC CFM AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 RPM Vdc RPM Vdc RPM Vdc RPM Vdc RPM Vdc 1200 1148 4 3 1343 5 0 1507 5 7 1651 6 2 1781 6 7 1300 1209 4 5 139...

Страница 51: ...16 2322 1 32 2419 1 49 2511 1 67 2599 1 85 2000 2284 1 26 2385 1 43 2480 1 61 2571 1 79 2658 1 98 2125 2350 1 37 2449 1 55 2543 1 73 2633 1 92 2719 2 12 2250 2417 1 49 2514 1 67 2607 1 87 2695 2 06 2...

Страница 52: ...PHASE HIGH STATIC 5 TON HORIZONTAL SUPPLY RPM VDC CFM AVAILABLE EXTERNAL STATIC PRESSURE in wg 0 2 0 4 0 6 0 8 1 0 RPM Vdc RPM Vdc RPM Vdc RPM Vdc RPM Vdc 1500 1335 4 7 1507 5 3 1660 5 9 1797 6 3 192...

Страница 53: ...RAMS WIRING DIAGRAMS 50JC 04 06 UNITS SIZE VOLTAGE CONTROL PAGE POWER PAGE 04 06 Controller SystemVu Standard 208 230 3 60 48TC003235 54 48TC003236 55 460 3 60 48TC003235 54 48TC003236 55 575 3 60 48T...

Страница 54: ...54 APPENDIX D WIRING DIAGRAMS Fig B 50JC 04 06 Control Wiring Diagram...

Страница 55: ...55 APPENDIX D WIRING DIAGRAMS Fig C 50JC 04 06 Power Wiring Diagram 208 230 460 3 60...

Страница 56: ...56 APPENDIX D WIRING DIAGRAMS Fig D 50JC 04 06 Power Wiring Diagram 575 3 60...

Страница 57: ......

Страница 58: ...the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53500275 01 Printed in U S A Form 50JC 4 6 01SM Pg 58 11 21 Repl...

Страница 59: ...ting in the correct direction Y N ______ Verify installation of thermostat space sensor Y N ______ Verify configuration values for electronic controls Y N ______ Refer to the Setpoint and Configuratio...

Страница 60: ...for correct ramp up of outdoor fan motor as condenser coil warms Y N ______ 2 Check unit charge per charging chart Y N ______ 3 Switch unit to HIGH LATENT mode SUBCOOL by turning Humidi MiZer test to...

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