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KLINGE NMF-371-02 Operation, Service And Parts Manual

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MODEL NMF-371-02
OPERATION, SERVICE AND PARTS MANUAL
Address: 4075 East Market Street York, PA 17402-5100 USA
Telephone: 717-840-4500
Telefax: 717-840-4501
www.klingecorp.com
MANUFACTURED BY KLINGE CORPORATION
UNCONTROLLED IF PRINTED
K35-NMF371-02
1
Rev. D, July 2023

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  • Page 1 MODEL NMF-371-02 OPERATION, SERVICE AND PARTS MANUAL Address: 4075 East Market Street York, PA 17402-5100 USA Telephone: 717-840-4500 Telefax: 717-840-4501 www.klingecorp.com MANUFACTURED BY KLINGE CORPORATION UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...

  • Page 2: Revision Record

    REVISION RECORD Description Date Approved Updated electrical diagram, updated alarm chart, corrected Section 9.1 Item 2021/9/30 15 part # Updated alarm chart, updated Section 9 2021/10/25 after full review Updated Electrical Diagram, updated quantities at Section 9.3A Items 5, 15 & 2023/01/16 16 to 1 each Updated Piping Diagram...
  • Page 3 Service Request Requests for Service should be directed to the Klinge Service Team. The below link should be used to place all requests for service and will afford the quickest response time. https://klingecorp.com/request-service/ This form will help us determine model and age of the equipment, location, basic details about the issue, who to contact and how to best handle the issues with the equipment.

  • Page 4: Table Of Contents

    CONTENTS SECTION 1. GENERAL DESCRIPTION .................. 6 SECTION 2. REFRIGERATION SYSTEM ................7 2.1 REFRIGERANT R134a High temperature system, compressors 1 & 2 .................7 2.2 REFRIGERANT R23 Low temperature system, compressor 3 ....................7 SECTION 3. OPERATION ....................10 3.1 GENERAL INFORMATION................................ 10 3.2 PRE-STARTING..................................
  • Page 5 8.3 UNIT INFORMATION ................................39 SECTION 9. SERVICE PARTS .................... 40 9.1 UNIT FRONT .................................... 41 9.2 CONDENSER SECTION LH (R134a Compressor side) ......................43 9.3A CONDENSER SECTION RH (R23 Compressor side) ......................45 9.3B CONDENSER SECTION RH (R23 Compressor side) ......................47 9.4 EVAPORATOR SECTION (Evap Fan Motor) ..........................

  • Page 6: Section 1. General Description

    SECTION 1. GENERAL DESCRIPTION Nose M The NMF-371-02 Unit ( ounded reezer Unit.) is designed especially for mounting and handling of cargo in customer built-in rooms or to be mounted on standard insulated containers. The unit can operate with cargo in the temperature range from -20°C to -70°C.

  • Page 7: Section 2. Refrigeration System

    SECTION 2. REFRIGERATION SYSTEM 2.1 REFRIGERANT R134a High temperature system, compressors 1 & 2 R134a has ozone depletion potential (ODP) at zero. When using R134a, the compressor oil must be ester synthetic oil. A moisture indicator is installed in the liquid line immediately after the filter drier to indicate if there is moisture in the refrigerant charge.
  • Page 8 The secondary side of the heat exchange (134a/R23) is condenser for the low temperature system (comp.3). The purpose is to move heat from the low temperature system to the refrigerant in the "high temperature system" The evaporator fans move air across the evaporator coil for the purpose of removing heat from cargo. The purpose of the compressor is to provide a high temperature, high-pressure vapor to the condenser coil so that heat can be removed with the heat exchanger surface (evaporator comp.1 &...
  • Page 9 2.3 UNIT PIPING DIAGRAM UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...

  • Page 10: Section 3. Operation

    All compressors are protected with overheat sensor controls by the microprocessor controller. 3.2 PRE-STARTING It is important that a Pre-Trip Inspection (PTI) be completed prior to each shipment. The NMF-371 Pre-Trip Inspection (PTI) form can be found on Klinge’s website at: http://www.klingecorp.com/pti/ 3.3 STARTING CHECK Connect the main power plug with the receptacle to supply power to unit.

  • Page 11: Running Unit

    Start “Run auto test” (start in "commands" in display), the unit will run the auto test for checking amps on all motors and goes to normal operation after test. See Sec 5.2 Controller for info about auto test (If some of the motors failed, see event log.) 10.

  • Page 12: Section 4, Electrical And Electronic Function

    SECTION 4, ELECTRICAL AND ELECTRONIC FUNCTION 4.1 GENERAL INFORMATION When high voltage is being fed to the unit and CB 1 is in the ON position, the power will pass along L1, L2 and L3 to the line of the: Compressor relay (CMR1-CMR2-CMR3), Condenser fan relay (CFR), Evaporator fan relays (EFR) and the transformer.

  • Page 13: Display

    that can be used for multiple units. To indicate that the controller is used for the NMF-371 unit, the controller. The controller also has a resistor code installed (pin 6-8, 10-pole plug). The resistor code for NMF-371 is 1800 . If the resistor code fails, disconnect the resistor and manually set the program code in the display, under "Control setting - System no."...

  • Page 14: Electrical Diagram

    4.4 ELECTRICAL DIAGRAM UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...

  • Page 15: Section 5. Controller Instructions And Sequence

    SECTION 5. CONTROLLER INSTRUCTIONS AND SEQUENCE 5.1 GENERAL INFORMATION The microprocessor controller system is based on the newest technology and consists of different parts: The microprocessor controller. The display/keypad. Temperature sensors. The controller is mounted in the electrical box, the display/keypad is mounted in the display panel box and all sensors are mounted in the unit.

  • Page 16: Unit Power On

    The starting sequence table below, shows the start-up sequence: Unit “ON/OFF” switch in “ON” position. UNIT POWER ON. Evaporator fan on. Next step: Delay 5 sec. Phase sensor relay 1on. Next step: Delay 10 sec. If load is <0.5A than condenser fan relay on and alarm A30 is set.
  • Page 17 The table below, shows the Auto test sequence: Unit “ON/OFF” switch in “ON” position. Unit Auto test Start in menu Commands - Auto test AUTO TEST RUNNING 0.0 0.0 0.0 A. Next step: Delay 5 sec. Evap. fan run Relay EFR on 1.0 1.0 1.0 A If fault, then text will be shown in display for 10 sec.

  • Page 18: Display

    5.3 DISPLAY The LED display shows all information regarding all temperatures for unit sensors, all data recorded in data logger and all information for unit operating conditions. DISPLAY (The display will always show the set point and the return air temperature in the display, except if MAIN MENU a text message comes up.) Setpoint.

  • Page 19: Keypad

    Software Newest data 5.4 KEYPAD The four button Keypad gives access to all operations, for setting of temperature and scrolling through unit data information. Keypad function The keypad can be set to require a password for setting changes. With the system operating, at the main screen Scroll using the UP arrow to the Config Menu Press the Right (Enter) arrow to enter the Config Menu Scroll using the Down arrow to the Switch Settings...
  • Page 20 Press ( ) for enter Network No: Each controller can be coded with a no. from 1 to 4, if there is more than one Controller in the Klinge downloading Scroll, press ( ) or ( ) system and if all Controllers are linked to the same PC Network.
  • Page 21 Manual test. >> relay, energized =1, de-energized =0 Press ( ) for enter. 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Scroll, press ( ) or ( ) Use ( ) or ( ) for scroll, and ( ) for ON/OFF (1/0) Esc.

  • Page 22: Temperature Sensor Ntc (Only Ambient Sensor)

    5.5 TEMPERATURE SENSOR NTC (ONLY AMBIENT SENSOR) The temperature sensor is a NTC thermistor element, placed in a sealed metal tube, which is connected to a two-conductor cable. The temperature signal from the sensor is relayed to the controller through this cable. The accuracy of this will not change, except for an internal malfunction of the sensor itself.

  • Page 23: Temperature Sensor Pt1000

    5.6 TEMPERATURE SENSOR PT1000 The temperature sensor is a PT 1000 thermistor element, placed in a sealed metal tube, which is connected to a two-conductor cable. The temperature signal from the sensor is relayed to the controller through this cable. The accuracy of this will not change, except for an internal malfunction of the sensor itself, If one of the sensors has an open/short circuit, the current alarm will be shown in display as “----sensor out of range”...

  • Page 24: Temperature Conversion Tables

    5.7 TEMPERATURE CONVERSION TABLES The numbers in bold-face type in the center column refer to the temperature, either in Centigrade or in Fahrenheit, which is to be converted to the other scale. Converting Fahrenheit to Centigrade, the equivalent temperature will be found in the left column.

  • Page 25: Section 6. Maintenance And Service Instruction

    SECTION 6. MAINTENANCE AND SERVICE INSTRUCTION This section provides procedures for establishing preventive maintenance and systematic servicing schedules, which are the keys to successful operation. 6.1 SAFETY When any work is to be done on the components of the refrigeration system, always make sure that the equipment cannot be started automatically or accidentally.

  • Page 26: Check Refrigerant R23 Charge

    adding refrigerant, always determine the reason for the low charge and remedy the cause. Leak test thoroughly with an electronic leak detector and check also for traces of oil. Caution: When the refrigerant charge is added, it is important initially to purge the air from the transfer tubes of the manifold gauge set.

  • Page 27: Opening R134A System

    (use the end of the hose without the “Schrader activator”). Mount the “Schrader activator end” of the hose to the R23 bottle. This order will avoid leakage between the system and the bottle pressure. The pressure from the bottle easily opens the Schrader valve during charging. NOTE: It is important initially to purge the air from the transfer hose, by loosening the hose adapter nut, on the Schrader adapter.
  • Page 28 Do not use the compressor as a vacuum pump or as an air compressor. It is not designed to handle air and will not pull down to as low a vacuum as a pump designed for that purpose. Similarly, if used to compress air, serious overheating and consequent damage may be the result.

  • Page 29: Refrigerant R134A /R23, Temperature / Pressure Table

    6.10 REFRIGERANT R134a /R23, TEMPERATURE / PRESSURE TABLE The table shows the pressure and temperature between the two refrigerant systems, with a T at 5° to 10°C on the heat exchange between high-pressure in the R23 system, and low-pressure in the R134a system. UNCONTROLLED IF PRINTED K35-NMF371-02 Rev.

  • Page 30: Section 7. Servicing Components

    SECTION 7. SERVICING COMPONENTS 7.1 COMPRESSOR (R134a / R23) The scroll compressor motors, in the R134a/R23 systems are equipped with an internal overload / overheat device. This device will break the circuit and stop the compressor, if any problem causes the motor to overheat. When the motor cools sufficiently the overload will reset automatically.

  • Page 31: Cond. And Evap. Fans Motor

    Note: After it has been observed that a hermetic motor has failed either by observing an obvious electrical fault or by a strong burned odor to the refrigerant gas released at the discharge valve port, the following procedure must be followed to clean the system and thus prevent failure of a replacement compressor.

  • Page 32: High-Pressure Switch, Compressor

    TO REPLACE DRIER IN THE R23 SYSTEM If the moisture indicator shows a yellow color, or if the outlet side of the drier feels cooler than the piping side, the drier should be changed. The total refrigerant charge must be pumped into a tank that is approved for the R23 gas. (See instruction, Section 6.7.) NOTE.

  • Page 33: Safety Relief Valve

    (See instruction, section 6.7). 7.8 SAFETY RELIEF VALVE There are four “safety relief valves” in the unit refrigerant system: One in the system’s discharge line, to relieve the pressure in the high-pressure side, if the unit gets overcharged. (29.3 bar) One in the system’s suction line, to relieve the pressure in the low-pressure side if the unit gets overcharged.

  • Page 34: Max. Hot Gas Pressure Regulator

    If valve fails, the total refrigerant charge must be pumped into an approved tank for R23 gas. (See instruction, section 6.7). 7.13 MAX. HOT GAS PRESSURE REGULATOR. To prevent operating the system with too high of pressure during defrosts a “max. hot gas pressure regulator” is mounted in the R23 hot gas piping, the valve opens for leading the pressure to the buffer tank.

  • Page 35: Servicing Schedule

    7.17 SERVICING SCHEDULE Daily or Initial 50 Every 250 Every 500 Every 1000 Every 2000 Weekly Hours Hours Hours Hours Hours REFRIGERATION SYSTEM (NMF SERIES) Check Compressor Oil Level / add if needed Check and clean Condenser Coils Check Moisture Indicators Check Refrigerant Levels Check Reefer for unusual...

  • Page 36: Section 8. Trouble Shooting

    SECTION 8. TROUBLE SHOOTING 8.1 GENERAL INFORMATION Several components are incorporated in the unit to assist the service engineer to find the cause of problems, concerning the operation and efficiency of the unit. L.E.D. lights on the display panel indicate which cycle the micro-processor controller is calling for and should be used in conjunction with the pressure gauges to determine whether certain cycles are operating.
  • Page 37 Cargo temp too high The cargo sensor alarm will activate if the Check refrigerant gas. Check TX configuration parameter is set to “ON” and a Cargo valve. Check evaporator fan ** Applicable only when sensor is mounted, and after the temperature has motor.

  • Page 38: Display Shows

    The container door has been open longer than the Close container door Door open too long time allowed Generator power drop Power supply to system has dropped below Check power supply output required voltage/frequency Emergency stop activated Emergency switch in container is activated. Check for person in container.

  • Page 39: Unit Information

    8.3 UNIT INFORMATION Electrical All data are approx. and based on 460volt/60 Hz Input power 400/460 volts +/-10% 3 phase 50/60 Hz+/-5% Compressor 1 motor 3400 Rpm - full load – 12Amps Compressor 2 motor 3400 Rpm - full load – 12 Amps Compressor 3 motor 3400 Rpm - full load –...

  • Page 40: Section 9. Service Parts

    SECTION 9. SERVICE PARTS SERVICE PARTS 9.1 Unit Front 9.2 Condenser Sec. LH (R134a Compressor side) 9.3 Condenser Sec. RH (R23 Compressor side) 9.4 Condenser Sec. LH (R134a Compressor side) 9.5 Vacuum Valve (located behind condenser fan motor) 9.6 Evap. Sec. (Evap Fan Motor) 9.7 Evap.

  • Page 41: Unit Front

    9.1 UNIT FRONT UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...
  • Page 42 ITEM PART NO. DESCRIPTION QTY. 360-16559-00 ELECTRICAL BOX COMPLETE 360-18431-00 AUXILIARY BOX 360-16773-00 GRILLE FAN K26 25272 01 FAN 21.85 DIA 7/8 BORE 10 BLADE 35°PITCH PUSH 360-16572-00 MOTOR ¾ HP MTR 1200 RPM 360 07969 00 LATCH WELDED 060 07971 00 KNOB K28 10873 00 INSULATOR LATCH...

  • Page 43: Condenser Section Lh (R134A Compressor Side)

    9.2 CONDENSER SECTION LH (R134a Compressor side) UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...
  • Page 44 ITEM PART NO. DESCRIPTION QTY. K22-07028-01 VALVE RELIEF 425 PSIG K25-26810-00 TRANSDUCER 0-500 PSI 360-18463-00 HIGH PRESSURE SWITCH 360 16509 25 PROBE ASSEMBLY COMPRESSOR 1 K15 00042 13 KIT VALVE DISCHARGE TEMPERATURE CONTROL K22-06970-00 VALVE ROTALOCK 1-14 K22-06910-00 VALVE ROTALOCK 1 ¼-12 K26 25217 00 COIL CONDENSER LH R134A 360-16517-01...

  • Page 45: A Condenser Section Rh (R23 Compressor Side)

    9.3A CONDENSER SECTION RH (R23 Compressor side) UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...
  • Page 46 ITEM PART NO. DESCRIPTION QTY. K22-07028-01 VALVE RELIEF 425 PSIG 360-16509-27 PROBE ASSEMBLY COMPRESSOR 3 K22-06910-00 VALVE ROTALOCK 1 ¼-12 K22-06970-00 VALVE ROTALOCK 1-14 K15 00042-13 KIT VALVE DISCHARGE TEMPERATURE CONTROL K22-07026-00 PRESSURE REGULATOR SUCTION LINE K22-07028-00 VALVE RELIEF 300 PSIG K25-26089-01 VALVE SOLENOID 360-17300-04...

  • Page 47: B Condenser Section Rh (R23 Compressor Side)

    9.3B CONDENSER SECTION RH (R23 Compressor side) UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...
  • Page 48 ITEM PART NO. DESCRIPTION QTY. K25-26089-01 VALVE SOLENOID 360-17300-04 COIL SOLENOID LIQUID VALVE HOT GAS K26-25220-00 HEAT EXCHANGER K26-10795-01 FILTER DRIER K26-25215-00 FILTER DRIER K26-25216-00 INDICATOR MOISTURE K26-25116-00 INDICATOR MOISTURE K22-07027-00 PRESSURE REGULATOR CONDENSING K25-26512-00 VALVE TX R134A K22-07040-00 VALVE PRESSURE REGULATOR K25-25729-01 ORIFICE ASSEMBLY TX VALVE UNCONTROLLED IF PRINTED...

  • Page 49: Evaporator Section (Evap Fan Motor)

    9.4 EVAPORATOR SECTION (Evap Fan Motor) UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...
  • Page 50 ITEM PART NO. DESCRIPTION QTY. 360-16509-23 PROBE ASSEMBLY DEFROST 360-16509-29 PROBE ASSEMBLY EVAPORATOR K26-25271-11 FAN 13.78 ½ IN BORE8 BLADE 35 PITCH PUSH K24-22433-00 MOTOR ¼ HP 1725 RPM ARTIC K28-11112-00 GASKET EVAPORATOR SEAL UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...

  • Page 51: Evaporator Section (Tx Valve R23)

    9.5 EVAPORATOR SECTION (TX Valve R23) UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...
  • Page 52 ITEM PART NO. DESCRIPTION QTY. K26-25223-00 COIL EVAPORATOR WITH HOT GAS K25-25728-00 VALVE THERMAL EXPANSION R23 K25-25729-00 ORIFICE TX VALVE 360-17300-04 COIL SOLENOID LIQUID VALVE HOT GAS K25-26089-01 VLAVE SOLENOID UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...

  • Page 53: Evaporator Section (View From Inside Of Container)

    9.6 EVAPORATOR SECTION (view from inside of container) UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...
  • Page 54 ITEM PART NO. DESCRIPTION QTY. 360-16509-22 PROBE ASSEBMLY SUPPLY AIR 360-16509-21 PROBE ASSEMBLY RETURN AIR UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...

  • Page 55: Control Box (Inside)

    9.7 CONTROL BOX (inside) UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...
  • Page 56 ITEM PART NO. DESCRIPTION QTY. K24-22439-00 CIRCUIT BREAKER IEC 3P 23-32A MMS CTI 45MB K24-22315-30 CONTACTOR REVERSING 30A 6P 24/29VAC 50/60HZ K24-58160-03 CONTACTOR C112 29V 60 HZ K24-58160-05 CONTACTOR C125 29V 60HZ K31-00927-10 CONTROLLER MPC3 LABELED K25-26741-00 TRANSFORMER 480/28-4.6A/24-1A/20-1A 166VA UL/CSA K21-16313-00 FASTENER BABY ANTI-LUCE M8 X 1.25 K25-26743-20...

  • Page 57: Auxiliary Box (Inside)

    9.8 AUXILIARY BOX (inside) UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...
  • Page 58 ITEM PART NO. DESCRIPTION QTY. K25-26265-02 SOCKET RELAY DPDT 1/8 DIN MOUNTING K24-22264-03 RELA 24 VAC MINI DPDT 3 AMPS K25-26266-02 SPRING RELAY HOLD DOWN 2 POLE K25-26550-02 JUMPER TERMINAL STRIP 8-18 GA 2 PL K25-26488-07 BLOCK TERMINAL STRIP 7P 45A 8-18 GA 360-15580-02 VOLTAGE REGULATOR 20-34 VAC TO 12 VDC 3 AMP K25-26933-00...

  • Page 59: Mpc3 Display

    9.9 MPC3 DISPLAY UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...
  • Page 60 ITEM PART NO. DESCRIPTION QTY. K35-06460-00 LABEL FRONT DISPLAY MPC3 K31-00929-10 DISPLAY TOUCH PAD CIRCUIT BOARD MPC3 LABELED 360-16509-12 CABLE DISPLAY 16 CORE 30 IN LONG UNCONTROLLED IF PRINTED K35-NMF371-02 Rev. D, July 2023...

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