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KRACK SM Series Operating And Installation Manual

Space master unit coolers
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SM/SV-Space Master Unit Coolers (E316008_B)
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Summary of Contents for KRACK SM Series

  • Page 1 SM/SV-Space Master Unit Coolers (E316008_B)

  • Page 2: Table Of Contents

    TABLE OF CONTENTS FIGURES ___________________________________________________________________________ 2 RECEIPT OF EQUIPMENT _______________________________________________________ 3 INSPECTION ________________________________________________________________ 3 LOSS OF GAS HOLDING CHARGE ______________________________________________ 3 ASSEMBLY OF COMPONENTS ___________________________________________________ 3 SHIPPED LOOSE PARTS- LONG THROW ADAPTERS _____________________________ 3 RIGGING INSTRUCTIONS _______________________________________________________ 3 RIGGING INSTRUCTIONS _____________________________________________________ 3 UNIT INFORMATION AND DIMENSIONS _________________________________________ 3 MODELS COVERED __________________________________________________________ 3 UNIT DIMENSIONS __________________________________________________________ 4...

  • Page 3: Figures

    TABLE OF CONTENTS CHARTS Table 1 UNIT DIMENSIONS ____________________________________________________________ 4 Table 2 CHECK VALVES KITS___________________________________________________________ 8 Table 3 DISTRIBUTOR NOZZLE CAPACITIES – TONS OF REFRIGERANT ______________________ 9 Table 4 SM MOTOR ELECTRICAL DATA (AMPS) __________________________________________ 10 Table 5 SV MOTOR ELECTRICAL DATA (AMPS) __________________________________________ 10 Table 6 SM (D) ED &...

  • Page 4: Receipt Of Equipment

    4 UNIT INFORMATION AND DIMENSIONS MODELS COVERED SM Series medium profile unit coolers. SV Series medium profile unit coolers - low temperature. The SM and SV series are designed for walk-in coolers with ceiling heights of 12 to 25 feet that require high airflow.

  • Page 5: Unit Dimensions

    Figure 1 Model Key SM/SV Model Key E - 842 - C Unit Type Heater Voltage SM: Space Master K - 208-230/3/60 SV: High Velocity M - 460/3/60 Number of Fans P - 575/3/60 U - 380/3/50 Fin Spacing 4, 5, 6, 7 FPI Motor Voltage K - 208-230/3/60 Type of Defrost...

  • Page 6: Unit Location And Mounting

    5 UNIT LOCATION AND MOUNTING UNIT LOCATION Unit coolers must be located to provide good air circulation to all areas of the cooler. The unit cooler should be positioned to blow away from the wall and directed down an aisle rather than into and through shelves. For best performance it is desirable to arrange the air discharge toward the door of the cooler to minimize the entrance of warm moist air when the door is open.

  • Page 7: Refrigeration Piping

    A union at the drain connection in the drain pan is recommended for ease of installation and future servicing. The union should be located as close to the drain pan as possible. Use two wrenches when tightening to prevent the drain fitting from twisting and damaging the unit. Hangers to avoid damage to the drain pan should support long runs of drain line, i.e.
  • Page 8 Legend Piping by Manufacturer - - - - Piping by Others Suction Check Valve Gas Inlet Check Valve Relief Check Valve Expansion Valve Aux. Side Connector Liquid Solenoid Valve See Table 2 for Check Valves Kits. SM/SV-Space Master Unit Coolers (E316008_B)
  • Page 9 Table 2 CHECK VALVES KITS Model (K) KGG, (P) KGE Suct line Gas inlet Gas relief (G) HGG, (H) HGE Gas inlet Check Valves Kit CV diam CV diam CV diam Check Valves Kit CV diam CE269377 1.625 0.500 0.500 CE269381 0.500 1.625...
  • Page 10 Table 3 DISTRIBUTOR NOZZLE CAPACITIES – TONS OF REFRIGERANT R-134A R-22 Distributor Evaporator Temperature (F) nozzle number 0.08 0.06 0.05 0.04 0.14 0.11 0.09 0.07 0.06 0.12 0.09 0.07 0.06 0.21 0.16 0.13 0.11 0.09 0.15 0.12 0.34 0.26 0.21 0.18 0.15 0.26 0.15 0.13 0.44 0.34 0.28 0.23 0.36 0.27 0.21 0.17 0.61 0.48 0.38 0.32 0.27...

  • Page 11: Electrical

    EXPANSION VALVE Before mounting the unit, install the expansion valve and connect the equalizer tube. The expansion valve should be installed directly to the distributor body or as close as possible with no elbows or bends. Locate the expansion valve bulb on a horizontal length of suction line as close to the suction header as possible. Position the bulb in a 3, 4 or 8, 9 o’clock position (do not position on the bottom side of the pipe).
  • Page 12 SM (D) ED & (E) EDL HEATERS ELECTRICAL DATA Table 6 Coil Total Total Heaters Heaters Watts Amps Watts Watts Circ Circ Circ Circ Circ Circ Q-ty Model Q-ty (E) EDL (SM & SV) – Coil and Drain Electrical Defrost 13800 34.70 384,426,440,501,556,574...

  • Page 13: Air Defrost Sequence Of Operation

    Table 7 SM (P) KGE & (H) HGE HEATERS ELECTRICAL DATA Pan Heaters Total Total Fan Q-ty Watts ea Amount Watts Amps 2550 6.41 2550 3.20 2550 2.56 1500 4500 11.31 1500 4500 5.65 1500 4500 4.52 5700 14.95 5700 7.16 5700 5.73...

  • Page 14: Electric Defrost Sequence Of Operation

    ELECTRIC DEFROST SEQUENCE OF OPERATION The electric defrost cycle is time clock initiated and temperature terminated with a timer and or high temperature over-ride. For systems with multiple unit coolers and a single defrost time clock the defrost termination thermostat must be wired in series. Reference figures 4 and 5 for electric defrost wiring diagrams. SEQUENCE OF OPERATION STEP A: Normal Refrigeration Cycle 1.
  • Page 15 Figure 7 ELECTRIC DEFROST WIRING WITH DEFROST TIMER Figure 8 (E) EDL Electrical Defrost Wiring 208-230/3/60 SM/SV-Space Master Unit Coolers (E316008_B)

  • Page 16: Hot Gas Defrost Sequence Of Operation

    Figure 9 (E) EDL Electrical Defrost Wiring 380/460/575/3/60 HOT GAS DEFROST SEQUENCE OF OPERATION The hot gas defrost cycle is time clock initiated and terminated. (H) HGE/(G) HGG THREE PIPE HOT GAS DEFROST Three pipes hot gas defrost systems distribute compressor discharge gas through a separate hot gas line, controlled by a solenoid valve, through a check valve to the refrigerant distributor auxiliary side connection.
  • Page 17 Figure 10 (H) HGE (3 Pipe) Hot Gas and Electrical Drain Pan Wiring Figure 11 (G) HGG (3 Pipe) Hot Gas Coil and Hot Gas Drain Pan Wiring (P) KGE/(H) KGG REVERSE CYCLE (2 PIPE) HOT GAS DEFROST SEQUENCE OF OPERATION Reverse cycle (2 pipe) defrost systems distribute compressor discharge gas through the suction line during defrost.
  • Page 18 1. Power is supplied to the unit cooler continuously. 2. Hot gas is supplied to the unit via the suction line. A factory-mounted thermostat senses a rise in coil temperature. The SPDT control turns off the fan motors. If the unit has a drain pan heater, the other portion of the SPDT control is now closed and the drain pan heater is energized.

  • Page 19: Start Up

    Figure 13 (K) KGG (2 Pipe) Cool Gas Coil and Drain Pan Wiring Single Pole Single Throw (SPST) contacts Fan Delay Thermostat mounted on the unit. RECOMMENTED (SPST) FAN DELAY THERMOSTAT SETTINGS FOR KGE/HGG ROOM TEMPERATURE RANGE DIFFERENTIAL 0 F TO +35 F 45 F 15 F BELOW 0 F...

  • Page 20: Operation Checkout

    OPERATION CHECKOUT With the system operating, check the supply voltage. The voltage must be within +/- 10% of the voltage marked on the unit nameplate and the phase to phase unbalance should be 2% or less. LISTEN CAREFULLY to the unit to make sure there are no unusual sounds. Sounds such as a noisy motor, the fan(s) scraping on the housing, or loose fasteners allowing parts to rattle need to be addressed immediately before continued unit operation.

  • Page 21: Coil And Cabinet

    9.2 COIL AND CABINET Clean the coil, fan cabinet, fans, and fan guards with warm water and soap. A low-pressure water hose is recommended to avoid water entering into electrical components and causing equipment failure. The evaporator coil should be checked once a month for proper defrosting. Many variables affect coil frosting such as room temperature, type of product being stored or processed, how often new product is brought in, and the length of time the door to the room remains open.

  • Page 22: Troubleshooting Chart

    the same location as the original heater. Install new heater rod in the coil original coil slot, rotate the rod 90°, and replace the wires in the positions of the original wires in the terminal block. Turn off all electrical power on the unit. Drain pan heaters require the drain pan to be removed.
  • Page 23 Table 8 REPLACEMENT PARTS LIST SM/SV-Space Master Unit Coolers (E316008_B)
  • Page 24 Krack Hussmann BOM Part Aftermarket Item General Description Options Description Number Part Number MOTOR SM 1 HP 208-230/460/60/3 850 RPM 11503 MO.4410138 SM 1 HP 575/60/3 850 RPM E205307 MO.4410180 SM 1.5 HP 380/60/3 1140 RPM E205492 MO.4410139 SV 1.5 HP 230/460/60/3 1140 RPM E205492 MO.4410139...
  • Page 25 SM-2/3 SS DPINS 460V H/KGE,EDL CE269325S DP.4915066 SM-1 K/HGGINS DRAIN PAN ASY E269105AS CALL SM-1 DRAIN PAN INSULATED SS E269141S CALL SM-2/3 SS DRAIN PAN INSULATED E269142S CALL SM-4 INNER DRAIN PAN SS E269495S CALL SM-4F DP INS E269490C CALL DT ERH HEATER 4.65 KW 230 VOLT E313359...
  • Page 26 1/2” CHECK VALVE 11852 VR.4612280 5/8” 11853 VR.4612281 7/8” 10930 CALL 1-1/8” 11804 VR.4612527 1-3/8” 11086 MO.4410727 1-5/8” E150087 VR.4612316 2-1/8” E205552 CALL SHIPPING LEG GLV 3.563 X 19.25 21776P TP.4915354 1X2.25X2.5 HINGE ZP 69113 HH.4914888 CHECK VALVE KIT 0.5" CE269381 CALL 0.875"...

This manual is also suitable for:

Sv seriesSpace master sm seriesSpace master sv series

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