Bryant 524J 14 Series Installation, Start-Up And Service Instructions Manual
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Bryant 524J 14 Series Installation, Start-Up And Service Instructions Manual

Bryant 524J 14 Series Installation, Start-Up And Service Instructions Manual

Packaged air-handling units with puron (r-410a) refrigerant 60 hz
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5 2 4 J * 1 4 - 1 6
P a c k a g e d A i r - H a n d l i n g U n i t s
w ith Pu ron
®
( R-4 1 0A ) Refr i g er an t
6 0 H z
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 2
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Moving and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Uncrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . . . . 11
Unit Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Unit Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Refrigerant Piping Access . . . . . . . . . . . . . . . . . . . . . . . . . 12
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Fan Motors and Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Supply and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Variable Frequency Drive . . . . . . . . . . . . . . . . . . . . . . . . . 20
Connecting Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
524J*14-16A and 524J*16H . . . . . . . . . . . . . . . . . . . . . . . . 23
524J*16H) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Indoor Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Cooling with 2-Speed Indoor Fan Motor . . . . . . . . . . . . . 24
Fan Speed Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
(and 30 days after initial start) . . . . . . . . . . . . . . . . . . . 26
Seasonal Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Fan Motor Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Fan Shaft Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Centering Fan Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Fan Shaft Position Adjustment . . . . . . . . . . . . . . . . . . . . . 27
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53524009-01
Installation, Start-up and
Service Instructions
Page
Printed in U.S.A.
Form No. II524J-14-16-02
Individual Fan Wheel Adjustment . . . . . . . . . . . . . . . . . . 27
Fan Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Fan Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Fan Pulley Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Pulley and Drive Adjustment . . . . . . . . . . . . . . . . . . . . . . 29
Variable Frequency Drive . . . . . . . . . . . . . . . . . . . . . . . . . 33
VFD REMOTE KEYPAD . . . . . . . . . . . . . . . . . . . . . . . . . 35
ACS320 Operation with Remote Keypad . . . . . . . . . . . . 35
ACS320 VFD Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
ACS320 VFD Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . 37
Correcting Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Correcting Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Reset After Using Start-Up Assistant . . . . . . . . . . . . . . . . 40
ACH580 Operation with Remote Keypad . . . . . . . . . . . . 40
ACH580 VFD Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
ACH580 VFD Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . 43
VFD MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Heat Sink Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Fan Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Bypass the VFD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Pg 1
2-24
Replaces: II524J-14-16-01

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  • Page 1: Table Of Contents

    5 2 4 J * 1 4 - 1 6 P a c k a g e d A i r - H a n d l i n g U n i t s w ith Pu ron ® ( R-4 1 0A ) Refr i g er an t 6 0 H z Installation, Start-up and...

  • Page 2: Safety Considerations

    Cleaning Cooling Coil ......49 Cleaning Insulation ......49 WARNING Replacing Filters .

  • Page 3: Pre-Installation

    PRE-INSTALLATION INSTALLATION The power supply (v, ph, and Hz) must correspond to that General specified on unit rating plate. Allow the following clearances for service access and airflow: The electrical supply provided by the utility must be suffi- • Rear: 2-1/2 ft (762 mm) [2-1/2 ft (762 mm) with electric cient to handle load imposed by this unit.
  • Page 4 Fig. 1 — Dimensions – Size 14 and 16...
  • Page 5 Fig. 1 — Dimensions – Size 14 and 16 (cont)
  • Page 6 9 10 11 12 13 14 15 16 17 5 2 4 J E 1 4 A 2 0 0 A 2 U A A A Model Type Packaging 524J = Bryant Fan Coil A = Standard Puron ® R-410A Refrigerant...
  • Page 7 Table 1 — 524J*14-16A Physical Data, English — Cooling Units UNIT 524J* NOMINAL CAPACITY (tons) 12-1/2 OPERATING WEIGHT (lb) Base Unit with TXV Plenum FANS Qty / Diameter (in.) 2 / 15 2 / 15 Nominal Airflow (cfm) 5000 6000 Airflow Range (cfm) 3750-6250 4500-7500...
  • Page 8 Table 2 — 524J*14-16A Physical Data, SI — Cooling Units UNIT 524J* NOMINAL CAPACITY (kW) OPERATING WEIGHT (kg) Base Unit with TXV Plenum FANS Qty / Diam. (mm) 2 / 381 2 / 381 Nominal Airflow (L/s) 2360 2831 Airflow Range (L/s) 1770-2949 2124-3539 Nominal Motor Hp (Standard Motor)
  • Page 9 Table 3 — 524J*16H Physical Data, English — Heat Pump Units UNIT 524J* NOMINAL CAPACITY (tons) OPERATING WEIGHT (lb) Base Unit with TXV Plenum FANS Qty / Diam. (in.) 2 / 15 Nominal Airflow (cfm) 5625 Airflow Range (cfm) 4500-7500 Nominal Motor Hp (Standard Motor) 208/230-3-60 and 460-3-60 575-3-60...
  • Page 10 Table 4 — 524J*16H Physical Data, SI — Heat Pump Units UNIT 524J* NOMINAL CAPACITY (kW) OPERATING WEIGHT (kg) Base Unit with TXV Plenum FANS Qty / Diam. (mm) 2 / 381 Nominal Airflow (L/s) 2655 Airflow Range (L/s) 2124-3539 Nominal Motor Hp (Standard Motor) 208/230-3-60 and 460-3-60 2.76...

  • Page 11: Rated Indoor Airflow (Cfm)

    Unit Positioning Coil The unit can be mounted on the floor for vertical application with return air entering the face of the unit and supply air discharging vertically through the top of the unit. The unit can also be applied in a horizontal arrangement with return air entering horizontally and the supply air discharging horizontally.

  • Page 12: Refrigerant Piping

    Refrigerant Piping and dimensions of the additional access holes required for 524J*16H units. Recommended access hole use is also listed for See Tables 1-4 for refrigerant pipe connection sizes. For ease in all units. Note that Fig. 6 shows the access holes on the control- brazing, it is recommended that all internal solder joints be made box side of the unit;...
  • Page 13 Table 9 — Fitting Requirements UNIT ACCESS HOLE NO. CONNECTION TYPE CIRCUIT FITTING REQUIRED (in.) 1-1/8 Street Elbow Suction Lower 1-1/8 Nipple, 7-5/8 L 1-1/8 Long Radius Elbow 5/8 Street Elbow Liquid Lower 5/8 Nipple, 1-7/16 L 5/8 Long Radius Elbow 524J*14A 5/8 Street Elbow Liquid...
  • Page 14 Equalizer Line Upper Sensing Split Bulb Solenoid Valve Sight Airflow 15 Diams Glass Diams 8 Diams Equalizer Filter Line Drier Lower Sensing Split Bulb Airflow 15 Diams Diams 8 Diams Indoor Coil Dual Circuit Coil Piping Configuration — 524J 14A/H-16A/H For single compressor condensing units.

  • Page 15: Condensate Drain

    Condensate Drain Install a trapped condensate drain line to unit connection as shown in Fig. 10. The unit drain connection is a PVC stub. (See Fig. 11.) Some areas may require an adapter to connect to either galvanized steel or copper pipe. For these applications, install a field-supplied threaded PVC adapter.

  • Page 16: Fan Motor

    Table 10 — Electrical Data — Two Speed Motors VOLTAGE LIMITS FAN MOTOR POWER SUPPLY UNIT VOLTAGE TYPE MOCP 2.16 11.0 208/230 2.16 11.0 HIGH 2.76 10.8 14.0 2.16 524J*14A 2.16 HIGH 2.76 2.76 2.76 HIGH 3.73 10.0 2.76 10.8 14.0 208/230 2.76...
  • Page 17 The 524J size 14-16 units that have motors wired for 460 v, 3 ph, 60 Hz operation can be field-converted to 208/230 v, 3 ph, 60 Hz operation. Rewire the motor according to the diagram plate on the motor. After reconfiguring the motor, mark the motor specifying 208 v or 230 v operation replacing the 460 v sticker information on the units’...
  • Page 18 NOTE: On select units, the black and blue IFM wires are reversed. Fig. 14 — Unit Wiring...

  • Page 19: Three Stage Operation

    THREE STAGE OPERATION The 3-stage system will run the fan at low speed with a G, Y1, and Y1+Y2 call, and at high speed with a call for Y1, Y2, and Y3. A All units are factory shipped for 2-stage cooling operation. To con- thermostat with 3 cooling stage capability is required for this sys- vert a unit to 3-stage operation, see Fig.

  • Page 20: Variable Frequency Drive

    Variable Frequency Drive The unit is equipped with a Variable Frequency Drive (VFD) to control the indoor fan in sequence with the unit’s ventilation, cool- ing, and heating operation. The VFD is controlled through a 0- 10vdc signal that is provided by the Unit Control Board (UCB) in the control box.
  • Page 21 Variable Frequency Drive (VFD) Fig. 18 — ACS320 VFD Location for the following units: 524J(E/P)14-16A, 524J(E/P)16H (208/230V and 460V only) Variable Frequency Drive (VFD) Fig. 19 — ACH580 VFD Location for the following units: 524JT14-16A, 524JT16H (575V only)

  • Page 22: Connecting Ductwork

    (See Fig. 21.) After flanges are installed, connect them to the supply duct using a canvas connection to prevent vibration. It is Refer to the Bryant System Design Manual for the recommended important that this connection be properly fabricated to prevent design and layout of ductwork.

  • Page 23: Start-Up

    Duct Flanges Fig. 21 — Duct Flange Installation START-UP Before starting unit, check the following and correct as necessary: 40RU500072 2.0 IMPORTANT! / IMPORTANT • Is unit solidly supported? • Is fan adjusted for speed and pulley alignment? EQUALIZER LINE CONDUITE D'ÉQUILIBRAGE •...

  • Page 24: Adjusting Txv For Superheat

    Adjusting TXV for Superheat (524J*14-16A and Cooling with 2-Speed Indoor Fan Motor 524J*16H) FIRST STAGE (Y1) The unit-mounted thermostatic expansion valve(s) is/are factory Set the thermostat FAN switch to AUTO and the SYSTEM switch set to provided superheat at the bulb location in 10°F to 15°F to COOL.

  • Page 25: Fan Speed Set Up

    To restore the unit to ready-to-start condition, disconnect the unit power and lock-out/tag-out, set the space thermostat to FAN AUTO, remove the test pressure ports from the external duct loca- tions, and re-set Low Speed 2-Pin DIP switches to factory setting (refer to wiring diagram on control box cover).

  • Page 26: Quarterly Inspection (And 30 Days After Initial Start)

    NOTE(S): AIR CONDITIONING a. The above list may not include all maintenance items. Inspection intervals may vary depending on climate and opening hours. Consult your Bryant dealer • Condenser fan motor mounting bolts tightness about a service contact for seasonal inspections.

  • Page 27: Fan Motor Lubrication

    Fan Motor Lubrication Fan Shaft Position Adjustment Fan motor supplied with unit is permanently lubricated and Loosen setscrew or locking collar of each fan shaft bearing. requires no further lubrication. Slide shaft into correct position and replace locking collar. (See Fig.

  • Page 28: Fan Rotation

    Pulley(s) Belts Motor Pulley(s) Slot Mounting Bolts Fig. 27 — Fan Motor Mounting Fan Rotation Correct fan rotation with respect to fan outlet is shown in Fig. 28. Adjustable Flanges To reverse the direction of rotation of a 3-phase fan motor, reverse any 2 of the power leads.

  • Page 29: Pulley And Drive Adjustment

    Pulley and Drive Adjustment Table 18 — Fan Motor Data, 524J***A Standard Motor, Two Speed — SI To obtain desired fan speed, refer to the fan motor, drive data and performance data in Tables 15-36 and adjust fan motor pulley as UNIT 524J*14A 524J*16A...
  • Page 30 Table 22 — Motor Efficiency 524J***H — Table 26 — Medium-Static Drive Data, 60 Hz — English Two-Speed Motor UNIT 524J*14A 524J*16A/H MOTOR EFFICIENCY MOTOR DRIVE MOTOR HP EPACT MINIMUM (%) Motor Pulley Pitch Diameter (in.) 3.4-4.4 3.7-4.7 — 82.0 Pulley Factory Setting Full Turns —...
  • Page 31 Table 29 — Medium-Static Drive Data, 60 Hz — SI Table 30 — High-Static Drive Data, 60 Hz — SI UNIT 524J*14A 524J*16A/H UNIT 524J*14A 524J*16A/H MOTOR DRIVE MOTOR DRIVE Motor Pulley Pitch Diameter (mm) 94.0-119.4 109.2-134-.6 Motor Pulley Pitch Diameter (mm) 86.4-111.8 94.0-119.4 Pulley Factory Setting Full Turns...

  • Page 32: Airflow (Cfm)

    Table 33 — Fan Performance Data — 524J 0-300 kPa ESP, 60 Hz — SI a,b,c EXTERNAL STATIC PRESSURE (Pa) AIRFLOW UNIT (L/s) 1770 6.84 0.32 7.78 0.41 9.46 0.62 10.82 0.83 12.02 1.05 13.13 1.28 14.19 1.53 2030 7.58 0.46 8.40 0.55...

  • Page 33: Variable Frequency Drive

    Variable Frequency Drive Table 38 — ACH580 VFD Terminal Designations The VFD switches the indoor fan motor speed between full/high speed (60 Hz motor operation) and reduced/low speed (40 Hz mo- TERMINAL FUNCTION tor operation), as required by ASHRAE 90.1-2016 and IECC-2015 requirements for two-stage HVAC units.

  • Page 34: Alarms

    If diagnostics troubleshooting has determined that the drive is de- SELECT), digital input or serial communication could also be fective during the warranty period, contact Bryant. used to reset the drive. When the fault has been corrected, the mo- tor can be started.

  • Page 35: Vfd Remote Keypad

    VFD REMOTE KEYPAD NOTE: The following only applies when a unit with the factory- CAUTION installed 2-Stage Indoor Fan Motor option is equipped with the CONFIGURATION OVERRIDE HAZARD field-installed Remote VFD Keypad (Part Number: CRDISK- KIT001A00) ACS320 or (Part Number: CRDISKKIT003A00) Do not use start-up assistant on this VFD application.

  • Page 36: Parameters Mode

    DOWN keys simultaneously. To restore the default factory set- download successful” will be displayed. tings, select the Bryant application macro. The display will then return to the PAR BACKUP menu. Select EXIT (SOFT KEY 1) to return to the main menu.

  • Page 37: Clock Set Mode

    Use the UP or DOWN keys to highlight DOWNLOAD ACS320 VFD Diagnostics APPLICATION and press SEL (SOFT KEY 2). The drive detects error situations and reports them using: The text “Downloading Parameters (partial)” will be dis- • Green and red LEDs on the body of the drive (located un- played with a progress indicator.

  • Page 38: Correcting Alarms

    Correcting Alarms If diagnostics troubleshooting has determined that the drive is de- fective during the warranty period, contact Bryant. To correct alarms, first determine if the alarm requires any correc- tive action (action is not always required). Use Table 40 to find and address the root cause of the problem.

  • Page 39: Panel Loss

    3015 UNDERLOAD CURVE. THERM FAIL Internal fault. The thermistor measuring the internal temperature of the drive is open or shorted. Contact Bryant. OPEX LINK Internal fault. A communication-related problem has been detected between the OMIO and OINT boards. Contact Bryant.

  • Page 40: Reset After Using Start-Up Assistant

    Reset After Using Start-Up Assistant on what is displayed on the screen. The function of Left Softkey matches the word in the lower left-hand box on the display screen. The function of Right Softkey matches the word in the lower right-hand box on the display screen.

  • Page 41: Ach580 Vfd Modes

    Use the following procedure to reset the factory configurations for Use the UP or DOWN keys to highlight the desired parameter and press EDIT (Press ACH580 VFDs: Use the UP or DOWN keys to change the value of the Disconnect unit power. Lock-out/tag-out. parameter.

  • Page 42: Parameters Mode

    Use the UP or DOWN keys to highlight PARAMETERS on the display screen and press Select (Press Use the UP or DOWN keys to highlight the desired parameter group and press Select (Press Use the UP or DOWN keys to highlight the desired parameter and press EDIT (Press Use the UP or DOWN keys to change the value of the parameter.

  • Page 43: Clock Set Mode

    Use the UP or DOWN keys to highlight TIME FORMAT and press SEL (Press ). Use the UP or DOWN keys to change the parameter setting. Press OK (Press ) to save the configuration and return to the Clock Set menu. Use the UP or DOWN keys to highlight SET DATE and press SEL (Press ).

  • Page 44: Alarms (Green Led Flashing)

    Hardware manual of the drive. If an earth fault is found, fix or change the motor cable and/or motor. If no earth fault can be detected, contact your local Bryant representative. Check motor and motor cable for cabling errors.
  • Page 45 Table 42 — Fault and Alarm Codes for ACH580 VFD (cont) CODE (HEX) WARNING / AUX. CODE CAUSE WHAT TO DO Check status of fieldbus communication. See user FBA A communication Cyclical communication between documentation of fieldbus interface. Programmable warning: drive and fieldbus adapter module A Check settings of parameter groups 50 Fieldbus adapter (FBA), A7C1...

  • Page 46: Vfd Maintenance

    See actions for each code below. VFD MAINTENANCE If installed in an appropriate environment, the VFD requires very little maintenance. Table 43 lists the routine maintenance intervals recommended by Bryant. Table 43 — Maintenance Intervals MAINTENANCE INTERVAL Every 6 to 12 months...

  • Page 47: Fan Replacement

    Unplug the fan power supply wires from the drive (see process, fan replacement is recommended once these symptoms Fig. 46). start appearing. Replacement fans are available from Bryant. Pull off the fan. ACH580 MAIN FAN REPLACEMENT Install the new fan in reverse order.

  • Page 48: Acs320 Fan Replacement

    Fig. 47 — Remove Fan Holder and Free Fan Cable Disconnect the fan cable. The fan cable connector is Fig. 45 — Remove Drive Cover located on the control board that is against the front of the (R1 and R2 Frame Sizes) drive.

  • Page 49: Bypass The Vfd

    Bypass the VFD IMPORTANT: It is recommended NOT to bypass the ACH580 VFD on 524J 575-3-60 units. WARNING Condensate Drains Bypassing the VFD is not recommended. This is a temporary procedure to provide cooling or heating Keep condensate drains free of dirt and foreign matter. operation when a new VFD is required.

  • Page 50: Replacing Filters

    Replacing Filters Filters can be removed and installed from either side of the unit. Install new filters in units that have one fan as follows: Remove the side access panel (retain screws). Remove the filter retainer clip (see Fig. 50). Remove old filters by lifting and tilting them out of the filter track.

  • Page 51: Appendix A - Vfd Parameters

    APPENDIX A — VFD PARAMETERS Table B — ACH580 VFD Common Parameters Table A — ACS320 Common Parameters PARAMETERS DESCRIPTION SETTING ACH580 PARAMETERS DESCRIPTION SETTING ACS320 10.30 Relay out 3 (15) FAULT (–1) 1001 EXT1 Commands 12.17 Minimum AI1 0.2V 1102 EXT1/EXT2 Sel EXT1...
  • Page 52 APPENDIX A — VFD PARAMETERS (cont) Table C — ACS320 VFD Parameters, for 524J Units with Electromechanical Controls VFD PARAMETERS PKG ABB ACS320 MOTOR PART NUMBER VFD PART NUMBER DRIVE HP DESC 40RU000130-DATA 40RU000130 HD56FR233 HK30WA523 40RU 1.7 HP 230V 40RU000131-DATA 40RU000131 HD56FR463...
  • Page 53 APPENDIX A — VFD PARAMETERS (cont) Table E — ACS320 VFD Parameters — 524J(E/P) (208/230V and 460V units only) MOTOR CONST CONST CONST CONST REPLACEMENT MOTOR VFD PART VOLTS SPEED SPEED SPEED SPEED COMPONENET DESCRIPTION PART AMPS NUMBER (9905) FREQ PART NUMBER NUMBER (9906)
  • Page 54 © 2024 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53524009-01 Printed in U.S.A. Form No. II524J-14-16-02 Pg 54 2-24 Replaces: II524J-14-16-01...

  • Page 55: Start-Up Checklist

    START-UP CHECKLIST Split Systems with 524J Units (Remove and use for job file) NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sections of this Installation, Start-Up, and Service document.
  • Page 56 CHECK VOLTAGE IMBALANCE Line-to-line volts: AB_____________ VAC______________ VBC______________V (AB + AC + BC)/3 = average voltage = _______________V Maximum deviation from average voltage = _______________V Voltage imbalance = 100 x (max deviation)/(average voltage) = ________________ If over 2% voltage imbalance, DO NOT ATTEMPT TO START SYSTEM! Call local power company for assistance.

This manual is also suitable for:

524j 16 series

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