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1 Part Number: E270190_H MS Series Medium Profile Unit Coolers (E270190_F) 1 MS Series Medium Profile Unit Coolers (E270190_H) 2 TABLE OF CONTENTS 1 UNIT INFORMATION AND DIMESIONS ............................................................................................................ 5 1.1 1.2 2 MODELS COVERED ____________________________________________________________________ 5 UNIT DIMESION _______________________________________________________________________ 6 RECEIPT OF EQUIPMENT..................................................................................................................................... 7 2.1 2.2 3 INSPECTION __________________________________________________________________________ 7 LOSS OF GAS HOLDING CHARGE ________________________________________________________ 7 ASSEMBLY OF COMPONENTS ............................................................................................................................. 7 3.1 3.2 3.3 3.4 4 SHIPPED LOOSE PARTS - LONG THROW ADAPTERS _______________________________________ REFRIGERANT DISTRIBUTOR NOZZLES _________________________________________________ EXPANSION VALVE____________________________________________________________________ CHECK VALVE ________________________________________________________________________ 7 7 7 8 RIGGING INSTRUCTIONS ..................................................................................................................................... 8 4.1 5 RIGGING INSTRUCTIONS _______________________________________________________________ 8 UNIT LOCATION AND MOUNTING .................................................................................................................... 8 5.1 5.2 6 UNIT LOCATION _______________________________________________________________________ 8 MOUNTING ___________________________________________________________________________ 8 PIPING INSTALLATION ......................................................................................................................................... 9 6.1 6.2 6.3 6.4 6.5 6.6 7 DRAIN LINE ___________________________________________________________________________ 9 REFRIGERATION PIPING _______________________________________________________________ 9 EVACUATION AND LEAK TEST ________________________________________________________ 11 MS GAS DEFROST PIPING _____________________________________________________________ 111 REFRIGERANT DISTRIBUTOR NOZZLES _______________________________________________ 111 EXPANSION VALVE___________________________________________________________________ 13 ELECTRICAL ........................................................................................................................................................ 133 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8 FIELD WIRING ______________________________________________________________________ 133 ELECTRICAL DATA __________________________________________________________________ 133 AIR DEFROST SEQUENCE OF OPERATION ______________________________________________ 144 ELECTRIC DEFROST SEQUENCE OF OPERATION ________________________________________ 166 HOT GAS DEFROST SEQUENCE OF OPERATION _________________________________________ 188 DUAL SPEED MOTOR – SEQUENCE OF OPERATION ______________________________________ 20 VARIABLE SPEED MOTOR – SEQUENCE OF OPERATION _________________________________ 21 VARIABLE SPEED MOTOR WITH SYSTEM 450 – SEQUENCE OF OPERATION ________________ 21 INTERLOCKING SINGLE COMPRESSOR UNIT WITH KRACK COILS _________________________ 22 START UP ............................................................................................................................................................... 233 8.1 8.2 9 PRE-STARTUP _______________________________________________________________________ 233 OPERATION CHECKOUT _____________________________________________________________ 233 PREVENTATIVE MAINTENANCE ................................................................................................................... 244 9.1 9.2 9.3 9.4 9.5 9.6 DRAIN PAN _________________________________________________________________________ COIL AND CABINET__________________________________________________________________ FAN GUARD OR LONG THROW ADAPTER REPLACEMENT _______________________________ FAN REPLACEMENT _________________________________________________________________ UNIT MOTOR REPLACEMENT _________________________________________________________ ELECTRIC DEFROST HEATERS ________________________________________________________ 244 244 255 255 255 255 10 TROUBLESHOOTING CHART .......................................................................................................................... 266 11 REPLACEMENT PARTS LIST ........................................................................................................................... 266 MS Series Medium Profile Unit Coolers (E270190_H) 3 TABLES TABLE 1 UNIT DIMENSIONS .................................................................................................................................................... 5 TABLE 2 CHECK VALVES KITS ................................................................................................................................................ 7 TABLE 3 DISTRIBUTOR NOZZLE CAPACITIES – TONS OF REFRIGERANT ................................................................... 122 TABLE 4 MS MOTOR ELECTRICAL DATA (AMPS) ............................................................................................................. 133 TABLE 5 (E) EDL HEATERS ELECTRICAL DATA ............................................................................................................... 144 TABLE 6 TROUBLESHOOTING .............................................................................................................................................. 26 TABLE 7 REPLACEMENT PARTS LIST ................................................................................................................................. 277 FIGURES FIGURE 1 UNIT DIMENSIONS ................................................................................................................................................. 6 FIGURE 2 DRAIN LINE.............................................................................................................................................................. 9 FIGURE 3 PIPE JOINING .......................................................................................................................................................... 9 FIGURE 4 MULTIPLE UNIT COOLERS CONTROLLED BY A SINGLE SOLENOID ........................................................... 10 FIGURE 5 MULTIPLE UNIT COOLERS CONTROLLED BY MULTIPLE SOLENOIDS ....................................................... 10 FIGURE 6 GAS DEFROST PIPING DIAGRAMS ................................................................................................................... 111 FIGURE 7 AIR DEFROST WIRING MOTOR TYPE C ........................................................................................................ 155 FIGURE 8 AIR DEFROST WIRING MOTOR TYPE D ........................................................................................................ 155 FIGURE 9 AIR DEFROST WIRING MOTOR TYPE V ........................................................................................................ 155 FIGURE 10 ELECTRIC DEFROST WIRING WITH DEFROST TIMER MOTOR TYPE C ................................................... 177 FIGURE 11 ELECTRIC DEFROST WIRING WITH DEFROST TIMER MOTOR TYPE D ................................................... 177 FIGURE 12 ELECTRIC DEFROST WIRING WITH DEFROST TIMER MOTOR TYPE V.................................................... 177 FIGURE 13 (E) EDL ELECTRIC DEFROST WIRING 1 PH.................................................................................................. 178 FIGURE 14 (E) EDL ELECTRIC DEFROST WIRING 3 PH.................................................................................................. 188 FIGURE 15 (H) HGE (3 PIPE) HOT GAS COIL AND ELECTRIC DRAIN PAN WIRING ................................................... 199 FIGURE 16 (G) HGG (3 PIPE)/(K) KGG (2 PIPE) GAS COIL AND GAS DRAIN PAN WIRING ........................................ 199 FIGURE 17 (P) KGE (2 PIPE) COOL GAS COIL AND ELECTRIC DRAIN PAN WIRING ................................................... 20 FIGURE 18 WIRING DRAWING OF EVAPORATOR WITH SYSTEM 450 ............................................................................. 21 FIGURE 19 SETUP IN SINGLE COMPRESSOR UNIT(INTERLOCKING SINGLE COMPRESSOR UNIT KRACK COILS) 22 FIGURE 20 DUAL SPEED EVAPORATER COILS (INTERLOCKING SINGLE COMPRESSOR UNIT KRACK COILS) ..... 22 FIGURE 21 VS SPEED EVAPORATER COILS (INTERLOCKING SINGLE COMPRESSOR UNIT KRACK COILS) ........... 23 FIGURE 22 REPLACEMENT PARTS LIST .............................................................................................................................. 26 MS Series Medium Profile Unit Coolers (E270190_H) 4 1 1.1 UNIT INFORMATION AND DIMENSIONS MODELS COVERED MS Series medium profile unit coolers. The MS series designed for walk-in coolers with ceiling heights of 10 to 14 feet that require high airflow. The MS series handles medium to low temperature requirements and has three defrost options – air, electric and hot gas. Consult the drawing that was sent with each unit to determine the temperature and defrost type. Additional refrigerants are shown in the TABLE classified as Glide and Non-Glide for selection of two speed or variable speed motors to meet DOE/NRCan regulations. MS Series Medium Profile Unit Coolers (E270190_H) 5 1.2 UNIT DIMENSIONS TABLE 1: UNIT DIMENSIONS Fan Q-ty 1 2 3 4 A 45.00 45.00 39.00 39.00 B 45.00 90.00 117.00 156.00 C 57.00 102.00 129.00 168.00 FIGURE 1: UNIT DIMENSIONS MS Series Medium Profile Unit Coolers (E270190_H) 6 2 2.1 RECEIPT OF EQUIPMENT INSPECTION All equipment should be carefully checked for damage or shortages as soon as it is received. Each shipment should be carefully checked against the bill of lading. If any damage or shortage is evident, a notation must be made on the delivery receipt before it is signed and a claim should then be filed against the freight carrier. 2.2 LOSS OF GAS HOLDING CHARGE Each unit cooler is leak tested, evacuated to remove moisture and then shipped with a gas holding charge. Absence of this charge may indicate a leak has developed in transit. The system should not be charged with refrigerant until it is verified that there is no leak or the source of the leak is located. 3 3.1 ASSEMBLY OF COMPONENTS SHIPPED LOOSE PARTS - LONG THROW ADAPTERS Long Throw Adapters are shipped loose. They should be mounted on the unit before the unit is installed. The evaporator fan cabinet contains through-bolts with the threaded end pointing out away from the fan cabinet. The bolts have two ½” nuts, flat washers, and a lock washer on them. Remove the outer most nut, lock washer, and one flat washer on each bolt. Place Long Throw Adapter on the top bolts braced against the remaining flat washer. While holding the adapter with one hand place the flat washers, then the lock washers, and then thread the nuts on the top two bolts to hold the guard and adapter in place. Repeat procedure on the bottom two bolts. Secure with a wrench. 3.2 REFRIGERANT DISTRIBUTOR NOZZLES Direct expansion unit coolers are piped using a refrigerant distributor with a changeable nozzle design to equally distribute refrigerant to each circuit of the evaporator coil. Distributor nozzles are installed at the factory. The nozzles provided with the unit have been selected for design conditions of 10F T.D. and 95F liquid refrigerant at the expansion valve inlet or the conditions supplied to the factory at the time of order. If the unit will be operated at conditions that are substantially different from these conditions, it may be necessary to select a different size nozzle. Contact the factory for advice. The nozzle must be installed in the distributor or the auxiliary side connector before installing the expansion valve. There are nozzle identification numbers stamped on one side of the nozzle. Be sure to insert the nozzle into the distributor with these numbers visible in case identification is required later. The nozzle is held in place by a retainer ring that is easily inserted or removed with a pair of needle nose pliers. 3.3 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). Clamp the bulb down flush and tight against the pipe and insulate. Never locate the bulb in a trap or downstream from a trap. Expansion valves are adjusted at the factory prior to shipment. The setting will be correct for many applications, but in other applications adjustments may be needed. It is important that the operation of the expansion valve be checked after the system has balanced out at the desired room temperature. If the coil is being starved it is necessary to reduce the superheat setting of the valve by turning the adjusting stem counter-clockwise. If the superheat is too low it is necessary to increase the superheat setting of the valve by turning the adjusting stem clockwise. It is recommended that for a 10F to 12F T.D. system, the valve should be adjusted to maintain 5F to 6F superheat. MS Series Medium Profile Unit Coolers (E270190_H) 7 3.4 CHECK VALVE Check valves kit brazed to the pipe at the field, refer to FIGURE 6. TABLE 2: CHECK VALVES KITS Gas Inlet Model Check Valve Kit Diameter 166, 178, 195, 212, 223, 239, 323, 356, 0.500 390, 424 CE269381 444, 445, 487, 502, 532 0.875 594, 602, 643, 669, 685, 710, 803, 858, 914 4 4.1 CE269382 0.875 RIGGING INSTRUCTIONS RIGGING INSTRUCTIONS MS units tend to be a long and heavy object. Jobsite requirements will affect the method of moving and lifting the unit into place. Carefully consider the support that is required to lift and move the unit. Under no circumstances should the shipping skid be used for lifting the unit. To ensure that the unit is not bowed or damaged when being lifted into place from above, all leg or hanger points should be used. If the unit is being lifted into place from underneath, a level support directly under all of the shipping legs is required to adequately steady the unit as it is lifted to the hanger rods. 5 5.1 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. Light fixtures, shelving and product boxes must be located so that they do not block the air intake or air discharge from the unit cooler. IMPORTANT: The coil face must be located a minimum of 27” from the wall to assure unrestricted air intake. 5.2 MOUNTING Install the expansion valve and equalizer connection before hanging the unit cooler. See section 2.3. The unit cooler should be suspended with 3/8” diameter rods. Rods should have double nuts on the top and bottom. Adequate support must be provided to hold the weight of the unit. The unit must be mounted so that the drain pan end is approximately 1” lower than the bottom of the electrical end of the unit. If mounted to a level ceiling the hanging brackets provide the slope. Mount to ceiling with hanging brackets provided. Suspended units must have sufficient clearance above the unit for cleaning the top. Remove shipping legs after installation. MS Series Medium Profile Unit Coolers (E270190_H) 8 6 6.1 PIPING INSTALLATION DRAIN LINE The drain line should be as short and as steeply pitched as possible with a minimum of ¼” drop per running foot. A drain line trap should be installed to prevent warm moist air from migrating through the drain line. If the temperature surrounding the drain line and trap is below freezing (32) it must be wrapped with a drain line heater and insulation. Be sure to also wrap the drain pan coupling. The drain line heater must be energized continuously. Be sure to follow the manufacturer’s recommendation when installing the drain line heat tape. FIGURE 2: Drain Line INSULATED WALL HEATING CABLE POWER LINE EVAPORATOR SLOPE DRAIN PIPE DOWN AND AWAY FROM EVAPORATOR ( 1/4 INCH PER FOOT OF PIPE ) DRAIN PAN UNION VAPOR SEAL THE PIPE PENETRATION CONDENSATE DRAIN LINE DRAIN LINE WRAPPED WITH INSULATING MATERIAL THERMOSTATICALLY CONTROLLED HEATING CABLE 4" to 6" DRAIN TRAP WITH ACCESS 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, but outside the drain pan space. Use two wrenches when tightening to prevent the drain fitting from twisting and damaging the unit. Use drain line hangers to avoid damage to the drain pan with long runs of drain line, i.e. more than a few feet. FIGURE 3: PIPE JOINING 6.2 REFRIGERATION PIPING System design must conform to all local and national codes, laws and regulations applying to the site of installation. In addition, the safety code for mechanical refrigeration, ASME B31.5, should be followed as a guide to safe installation and operation practice. Refrigerant line sizes and piping techniques should be obtained from the ASHRAE guide or equivalent reference. Under no circumstances should the refrigerant connection size of the unit be used as the basis for sizing the lines. The horizontal suction line should slope away from the unit cooler toward the compressor. Vertical suction risers may require a trap at the bottom of the riser for proper oil return. MS Series Medium Profile Unit Coolers (E270190_H) 9 When connecting multiple unit coolers in series using a common suction line, the branch suction lines must enter the top of the common suction line. The branch lines must be sized for the evaporator capacity and the common suction line to be sized for the total system capacity. To properly protect and control systems using pumped liquid overfeed R744, the solenoid, isolation, and pressure relief valves shall be arranged as shown in either FIGURE 4 or 5, according to the solenoid valve arrangement. To handle the requirements of liquid R744 high pressure solenoid valves are to be used. FIGURE 4: MULTIPLE UNIT COOLERS CONTROLLED BY A SINGLE SOLENOID FIGURE 5: MULTIPLE UNIT COOLERS CONTROLLED BY MULTIPLE SOLENOIDS aam MS Series Medium Profile Unit Coolers (E270190_H) 10 6.3 EVACUATION AND LEAK TEST When all refrigeration connections have been completed, the entire system must be tested for leaks and then evacuated. Refer to the instructions provided with your systems condensing unit for information on performing the leak test and evacuation. 6.4 MS GAS DEFROST PIPING FIGURE 6: Gas Defrost Piping Diagrams 6.5 REFRIGERANT DISTRIBUTOR NOZZLES Direct expansion unit coolers are piped using a refrigerant distributor with a changeable nozzle design to equally distribute refrigerant to each circuit of the evaporator coil. Distributor nozzles are installed at the factory. The nozzles provided with the unit have been selected for design conditions of 10F T.D. and 95F (95F electric and hot gas defrost) liquid refrigerant at the expansion valve inlet. If the unit will be operated at conditions that are substantially different from these conditions, it may be necessary to select a different size nozzle. Contact the factory for advice. The nozzle must be installed in the distributor or the auxiliary side connector before installing the expansion valve. There are nozzle identification numbers stamped on one side of the nozzle. Be sure to insert the nozzle into the distributor with these numbers visible in case identification is required later. The nozzle is held in place by a retainer ring that is easily inserted or removed with a pair of needle nose pliers. MS Series Medium Profile Unit Coolers (E270190_H) 11 TABLE 1: DISTRIBUTOR NOZZLE CAPACITIES – TONS OF REFRIGERANT DISTRIBUTOR NOZZLE NUMBER 1/9 1/6 1/4 1/3 1/2 3/4 1 1/1/2 2 2/1/2 3 4 5 6 8 10 12 15 17 20 25 30 35 40 50 DISTRIBUTOR NOZZLE NUMBER 1/9 1/6 1/4 1/3 1/2 3/4 1 1/1/2 2 2/1/2 3 4 5 6 8 10 12 15 17 20 25 30 35 40 50 40° 0.09 0.14 0.23 0.3 0.41 0.62 0.83 1.2 1.65 2.06 2.47 3.31 4.08 4.89 5.89 6.6 8.16 10.1 11.3 13.6 17.1 19.6 23.6 26.4 34.3 20° 0.07 0.11 0.17 0.23 0.31 0.47 0.63 0.92 1.26 1.57 1.88 2.52 3.11 3.72 4.49 5.03 6.21 7.7 8.61 10.4 13.1 14.9 17.9 20.1 26.1 R507 40° 0.09 0.14 0.23 0.29 0.41 0.61 0.82 1.2 1.64 2.05 2.46 3.29 4.06 4.86 5.86 6.57 8.11 10.1 11.2 13.6 17.1 19.5 23.4 26.3 34.1 20° 0.07 0.11 0.17 0.22 0.31 0.47 0.62 0.91 1.25 1.56 1.87 2.5 3.08 3.69 4.45 4.99 6.16 7.64 8.54 10.3 12.9 14.8 17.8 20 25.9 0° 0.05 0.08 0.13 0.17 0.24 0.36 0.49 0.71 0.97 1.21 1.45 1.94 2.4 2.87 3.46 3.88 4.79 5.94 6.64 8.01 10.1 11.5 13.8 15.5 20.1 R404A R407A EVAPORATOR TEMPERATURE (°F) 0° -20° -40° 40° 20° 0° 0.05 0.04 0.04 0.11 0.08 0.07 0.08 0.07 0.05 0.17 0.13 0.1 0.13 0.11 0.09 0.27 0.21 0.17 0.18 0.14 0.11 0.35 0.27 0.22 0.24 0.19 0.16 0.48 0.38 0.3 0.37 0.29 0.24 0.72 0.57 0.46 0.49 0.39 0.32 0.97 0.76 0.61 0.71 0.57 0.46 1.41 1.1 0.89 0.98 0.78 0.64 1.94 1.51 1.22 1.22 0.97 0.79 2.41 1.88 1.52 1.47 1.17 0.95 2.9 2.26 1.82 1.96 1.56 1.27 3.88 3.03 2.43 2.42 1.93 1.57 4.78 3.73 3 2.91 2.31 1.88 5.73 4.48 3.6 3.5 2.79 2.27 6.91 5.39 4.34 3.92 3.12 2.54 7.74 6.05 4.86 4.84 3.86 3.14 9.56 7.47 6 6.01 4.78 3.89 11.9 9.26 7.45 6.72 5.35 4.35 13.3 10.4 8.33 8.1 6.45 5.24 16 12.5 10 10.2 8.11 6.6 20.1 15.7 12.6 11.6 9.27 7.54 23 17.9 14.4 14 11.1 9.07 27.6 21.6 17.3 15.7 12.5 10.2 31 24.2 19.5 20.4 16.2 13.2 40.2 31.4 25.2 -20° 0.06 0.09 0.14 0.18 0.25 0.38 0.5 0.73 1 1.25 1.5 2.01 2.48 2.98 3.58 4.02 4.96 6.15 6.88 8.29 10.4 11.9 14.3 16.1 20.9 -40° 0.05 0.07 0.12 0.15 0.21 0.32 0.43 0.62 0.85 1.06 1.28 1.71 2.11 2.53 3.05 3.42 4.22 5.23 5.85 7.05 8.87 10.1 12.2 13.7 17.7 R448A/R449A EVAPORATOR TEMPERATURE (°F) -20° -40° 40° 20° 0° -20° 0.04 0.03 0.08 0.06 0.05 0.04 0.07 0.05 0.12 0.09 0.07 0.06 0.11 0.09 0.19 0.15 0.12 0.09 0.14 0.11 0.25 0.20 0.15 0.12 0.19 0.16 0.35 0.27 0.21 0.17 0.29 0.23 0.53 0.41 0.32 0.26 0.39 0.31 0.70 0.54 0.43 0.35 0.56 0.46 1.02 0.79 0.63 0.50 0.77 0.62 1.40 1.09 0.86 0.69 0.96 0.78 1.75 1.35 1.07 0.86 1.15 0.93 2.10 1.63 1.28 1.04 1.54 1.25 2.81 2.18 1.72 1.39 1.9 1.54 3.47 2.68 2.12 1.71 2.28 1.85 4.16 3.22 2.54 2.05 2.75 2.23 5.01 3.88 3.06 2.47 3.08 2.5 5.62 4.34 3.43 2.77 3.8 3.08 6.94 5.37 4.24 3.42 4.72 3.83 8.60 6.65 5.26 4.24 5.27 4.28 9.62 7.44 5.88 4.74 6.36 5.16 11.60 8.97 7.08 5.71 8 6.48 14.60 11.30 8.91 7.19 9.13 7.41 16.70 12.90 10.20 8.21 11 8.91 20.00 15.50 12.20 9.88 12.3 9.99 22.50 17.40 13.70 11.10 16 13 29.20 22.50 17.80 14.40 MS Series Medium Profile Unit Coolers (E270190_H) -40° 0.03 0.05 0.08 0.10 0.14 0.21 0.29 0.42 0.57 0.71 0.86 1.15 1.41 1.70 2.04 2.29 2.83 3.51 3.92 4.72 5.94 6.79 8.17 9.16 11.90 12 6.6 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). Clamp the bulb down flush and tight against the pipe and insulate. Never locate the bulb in a trap or downstream from a trap. Expansion valves are adjusted at the factory prior to shipment. The setting will be correct for many applications, but in other applications adjustments may be needed. It is important that the operation of the expansion valve be checked after the system has balanced out at the desired room temperature. If the coil is being starved, it is necessary to reduce the superheat setting of the valve by turning the adjusting stem counter-clockwise. If the superheat is too low it is necessary to increase the superheat setting of the valve by turning the adjusting stem clockwise. It is recommended that for a 10F to 12F T.D. system, the valve should be adjusted to maintain 5F to 6F superheat. 7 ELECTRICAL 7.1 FIELD WIRING Field wiring should comply with NEC and local codes. The power supply voltage, phase and frequency must match what is shown on the unit cooler data plate. The field-wiring compartment is constructed as part of the unit cooler enclosure. The wiring diagram for each unit is located on the inside of the electrical panel door. Wiring connections are made at the terminal block(s) provided inside the unit on the end opposite the refrigerant connections. The unit must be grounded. Refer to TABLE’s 4 and 5 for motor and heater electrical information. Special consideration must be taken when wiring single-phase fan motors and defrost heaters. If the total amp draw of the motors or heaters exceed the amp rating of the fan delay or heater safety switch then a contactor must be installed. 7.2 ELECTRICAL DATA TABLE 2: MS MOTOR ELECTRICAL DATA (AMPS) FAN Q-ty 1 2 3 4 230/3/60 2.0 4.0 6.0 8.0 Motor Type C 460/3/60 575/3/60 1.0 0.8 2.0 1.6 3.0 2.4 4.0 3.2 380/3/50 1.1 2.2 3.3 4.4 MS Series Medium Profile Unit Coolers (E270190_H) Motor Type V and D 115/1/60 230/1/60 230/3/60 4.0 7.0 7.0 8.0 14.0 7.0 12.0 21.0 10.6 16.0 28.0 13 TABLE 3: (E) EDL HEATERS ELECTRICAL DATA And (P) KGE & (H) HGE HEATERS ELECTRICAL DATA 7.3 AIR DEFROST SEQUENCE OF OPERATION SEQUENCE OF OPERATION 1. The unit cooler fan motors are energized and the fans operate continually. 2. The room thermostat calls for cooling. The liquid solenoid valve opens allowing liquid to flow to the unit cooler. The suction pressures rises and starts the compressor. 3. When the room temperature is satisfied the thermostat opens and closes the liquid solenoid. The compressor continues to run until the suction pressure reaches the low-pressure cutout setting and shuts off the compressor. 4. The fan circulates air over the coil and frost melts. For air defrost to work properly the compressor run time should not exceed 40 minutes per hour. MS Series Medium Profile Unit Coolers (E270190_H) 14 AIR DEFROST WIRING FIGURE 7: MOTOR TYPE C FIGURE 8: MOTOR TYPE D FIGURE 9: MOTOR TYPE V MS Series Medium Profile Unit Coolers (E270190_H) 15 7.4 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 FIGURE’s 10 Through 14 for electric defrost wiring diagrams. SEQUENCE OF OPERATION STEP A: Normal Refrigeration Cycle 1. Power is supplied to terminals “N’ and “4” on the defrost timer. 2. The heater safety and fan delay thermostat are closed, the defrost termination thermostat is off and the defrost heaters are off. 3. The unit cooler fan motors are energized, and the fans operate continually. 4. The systems compressor operates in accordance with the demand of the room thermostat. 5. Frost slowly builds up on the evaporator fins. STEP B: Defrost Cycle The timer starts defrosting of the evaporator coil at a predetermined interval. A typical setting would be two defrost periods per 24-hour day. 1. Upon initiation of the defrost cycle, the timer mechanically disconnects power to terminal “4” thus closing the liquid line solenoid valve and shutting off the fan motors. Simultaneously power is connected to terminal “3” which allows current to flow to the defrost heaters. 2. The heaters, embedded in slots in the coil face, give up heat directly to the evaporator fins. This heat raises the coil temperature to 32F causing the frost to melt. 3. As the frost melts it drops into the drain pan and flows down the drain. 4. When the frost has completely melted from the coil the temperature of the coil will start to rise above 32F. 5. When the coil reaches the temperature setting of the defrost termination thermostat (75F for fixed Klixon), the thermostat closes which allows current to flow to terminal “X” on the timer which energizes the switching solenoid in the timer. The timer disconnects power to terminal “3” thus turning off the defrost heaters. At the same, instant power is connected to terminal “4” of the timer. 6. Because there is power at terminal “4” the liquid line solenoid opens and the compressor restarts. 7. The evaporator fan motor(s) remain off because the fan delay thermostat is still open. This prevents warm air from being blown into the refrigerated area. 8. The evaporator coil cools down approaching operating temperature. 9. When the coil temperature reaches 25F (approximately 2 to 3 minutes after defrost termination) the fan delay thermostat closes, thus allowing the fan motors to restart. The unit is now back in operation. 10. The heater safety thermostat will only open if the defrost termination thermostat fails to close at its set temperature. The heater safety thermostat is set to open at 80F. The timer also has a fail-safe (inner dial) timeout; the recommended setting is for 30 minutes. NOTE: On systems where the room temperature is above +25F the fan delay thermostat may not close for an extended period of time. If the fan delay time is too long, it is permissible to install a jumper wire between terminals “F” and “B” at the unit cooler. This allows the fans to turn on immediately after the defrost period. MS Series Medium Profile Unit Coolers (E270190_H) 16 ELECTRIC DEFROST WIRING WITH DEFROST TIMER FIGURE 10: MOTOR TYPE C FIGURE 11: MOTOR TYPE D FIGURE 12: MOTOR TYPE V MS Series Medium Profile Unit Coolers (E270190_H) 17 FIGURE 13: (E) EDL ELECTRIC DEFROST WIRING 1 PH FIGURE 8: (E) EDL ELECTRIC DEFROST WIRING 3 PH 7.5 GAS DEFROST SEQUENCE OF OPERATION The gas defrost cycle is time is field controller initiated and terminated (H) HGE/(G) HGG THREE PIPE HOT GAS DEFROST Three pipe 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. Defrost condensate and gas vapor is evaporated in a re-evaporator outside the MS unit prior to returning to the compressor through the suction line. (P) KGE/(K) KGG REVERSE CYCLE (2 PIPE) HOT GAS DEFROST Reverse cycle (2 pipe) defrost systems distribute compressor discharge gas through the suction line during defrost. Defrost condensate flows through the refrigerant distributor auxiliary side connection and a check valve, bypassing the expansion valve and the liquid line solenoid valve into the liquid line, which is reduced in pressure. SEQUENCE OF OPERATION - GAS DEFROST WITH ELECTRIC DRAIN PAN HEATER Step A – Power is supplied to the unit cooler continuously. Step B – In Case of H defrost hot gas is supplied to the unit via liquid line and in Case of P defrost Kool Cas is supplied to the suction line. A factory mounted thermostat (KP73) senses a rise in the 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. MS Series Medium Profile Unit Coolers (E270190_H) 18 Step C – When the defrost is complete, the hot gas supply is stopped. The liquid line solenoid is energized, and the coil temperature begins to fall. Step D – The factory mounted thermostat senses the drop in coil temperature. The SPDT thermostat opens the circuit to the drain pan heater (when supplied) and closes the circuit to the fan motors. Recommended (SPDT) fan delay/drain pan heater thermostat settings: Room Range Differential 0°F to +35°F 45°F 15°F Below 0°F 20°F 10°F (Note: Fan delay set point = Range – Differential) A separate SPDT thermostat (KP73) is provided in the coil which can provide a digital defrost termination input. SEQUENCE OF OPERATION - GAS DEFROST WITH GAS DRAIN PAN HEATER Step A – Power is supplied to the unit cooler continuously. Step B – In Case of H defrost hot gas is supplied to the unit via liquid line and in Case of P defrost Kool Cas is supplied to the suction line. A factory mounted thermostat (Klixon) senses a rise in the coil temperature. The SPDT control turns off the fan motors. Step C – When the defrost is complete, the hot gas supply is stopped. The liquid line solenoid is energized, and the coil temperature begins to fall. Step D – The factory mounted thermostat senses the drop in coil temperature and closes the circuit to the fan motors. A separate SPDT thermostat (KP73) is provided in the coil which can provide a digital defrost termination input. FIGURE 9: (H) HGE (3 PIPE) HOT GAS COIL AND ELECTRIC DRAIN PAN WIRING FIGURE 106: (G) HGG (3 PIPE)/(K) KGG (2 PIPE) GAS COIL AND GAS DRAIN PAN WIRING MS Series Medium Profile Unit Coolers (E270190_H) 19 FIGURE 17: (P) KGE (2 PIPE) COOL GAS COIL AND ELECTRIC DRAIN PAN WIRING AND (K) KGG (2 PIPE) COOL GAS COIL AND ELECTRIC DRAIN PAN WIRING 7.6 TWO SPEED MOTOR SEQUENCE OF OPERATION – MS coils use DUAL SPEED EC motors for fans in DOE applications, default being the High speed, the second speed is set as Minimum speed. Fans will be in Min speed/Full speed Or Off on below mentioned scenarios. Minimum speed When the room temperature or the refrigeration setpoint is met the fan should operate at half speed. Full Speed When the room temperature or refrigeration setpoint Is not met and the fan should run at full speed Fan off For EL/Gas defrost evaporators, during defrost fans should turn off Krack gives the option of field control for this motor to run at minimum speed or it also gives the option of installed room thermostat to operate this as DUAL SPEED motor. When using the option of installed room thermostat, do not use the same thermostat to control the LLSV. For DUAL SPEED operation MS coils comes with 10V power supply and a Relay named LS relay installed in the panel. When using installed thermostat, the SPDT switch of the thermostat will energize the LS Relay. This relay will close the contact of the 10V power supply to the motor, thus supplies 10V to motor and Motor will run in low speed. When the room temperature is above the setpoint and will not energize the LS relay, when the room temperature is met the SPDT switch of the thermostat will energize the LS relay and send 10V signal to motor and make motor to run at minimum speed. When using the field controller, the motor low speed is controlled through an output, the output may energize or de-energized based on room temperature input. LS relay will be energized only when the controller energized or de-energized the connected output. When using the field-installed thermostat, the same concept of installed thermostat will be applicable. MS Series Medium Profile Unit Coolers (E270190_H) 20 7.7 VARIABLE SPEED MOTOR SEQUENCE OF OPERATION Variable speed motor need 0-10V signal from filed, 0-10V signal wires will be connected to terminal allotted in the Evaporator panel (Terminal A0+ & A0-). 0V being the Maximum speed and 10V being minimum speed. Speed varies based on the analog signal received by motor, 7.8 VARIABLE SPEED MOTOR WITH SYSTEM 450 – SEQUENCE OF OPERATION An installed System 450 C450CPN-4 controller will be utilized to supply 0-10V signal to Variable speed motor. Temperature sensor installed in the evaporator and wired to the System 450 control module will be utilized to measure the box temperature. 7.6.1 SYSTEM 450 PARAMETERS – Set Point (SP) – is the target value that the control system drives toward. Set point at which Fan motor will run at full speed. – Target Box Temperature End Point (EP) – is the maximum deviation from the target value. Setpoint at which Fan motors will run at Minimum speed – Target Box Temperature – 5°F Output at Setpoint (OSP) – is the signal strength level of the analog output when the input sensor is at Setpoint (SP). The OSP is expressed as a percentage (0 to 100%) of the full-scale output. Output signal strength at setpoint, i.e. Analog signal at setpoint. 0% - 0V Output at Endpoint (OEP) – value (OEP) is the signal strength level of the analog output when the input sensor is at the End Point (EP). The OEP is expressed as a percentage (0 to 100%) of the full-scale output. Output signal strength at endpoint, i.e Analog signal at endpoint. 100% - 10V Fan motor will receive 0V signal at Setpoint (SP) from system 450 controller, so the fans will run at full speed. At Endpoint (EP) fans will receive 10V signal, so the fans will run at minimum speed. The analog signal varies between setpoint to endpoint proportionally based on the box temperature measured by installed temperature sensor thus varies the fan speed proportionally. Signal amplifier is used enhance the analog signal strength from System 450 and then feed the signal to Motor to vary the fan speed. (Signal amplifier needed for KR, GH, GL and LH evaporator coils only) Sensor Failure Mode – System 450 allows you to select the mode of operation for your control system outputs in the event of a sensor (or sensor wiring) failure of the sensor that the outputs reference. Set SNF as OFF. Analog output SNF OFF = Output Signal Strength at Setpoint (OSP). i.e Analog out put will fail at OSP setpoint. Sending 0V signal to motor. 7.6.2 FIGURE 18: - WIRING DRAWING OF EVAPORATOR WITH SYSTEM 450 – MS Series Medium Profile Unit Coolers (E270190_H) 21 7.9 INTERLOCKING SINGLE COMPRESSOR UNIT WITH KRACK COIL When a single compressor unit utilized with Krack evaporators, Evaporator fan should run at full speed whenever the compressor is running. i.e, when using evaporator with DUAL SPEED motor fans, and variable speed motor fans the fan speed should not modulate when the compressor is running, fan speed can modulate only when compressor is turned off due to system operation. When Krack Evaporator coils used with Single compressor units from Hussmann (H series and C series), there is provision given to interlock the compressor with evaporator fans. Single compressor units use contactor for compressor operation, a NC Aux contact attached to the main contactor and will be used to interlock. FIGURE 19: SETUP IN SINGLE COMPRESSOR UNIT: - Aux contact wired to 2 terminal pins. FIGURE 20: DUAL SPEED MOTOR EVAPORATER COILS – ( MOTORS WITH 10V EXTERNAL POWER SUPPLY) In case of s DUAL SPEED Motor coils with 10V power supply – the Jumper between terminal 6 and C should be removed and then and then aux contact from single compressor unit wired in series. Whenever the compressor contactor energized the Aux contact energizes, and NC contacts changes state to NO, there by OPEN the 10V power supply circuit. So, whenever compressor is ON, fans will never go to low speed mode, even getting signal from Room thermostat or filed controller. MS Series Medium Profile Unit Coolers (E270190_H) 22 FIGURE 21: VARIABLE SPEED MOTOR EVAPORATER COILS – In Case of Variable speed motor coils – the Jumper between terminal A0+ and A should be removed and then and then aux contact from single compressor unit wired in series. Whenever the compressor contactor energized the Aux contact energizes, and NC contacts changes state to NO, there by OPEN the analog 10V signal circuit. So, whenever the Controller sends the 10V signal it goes through Aux contact, and make sure that compressor is ON and there by deactivates the analog signal circuit. So, when compressor is ON then fans will never be able to modulate, though Controller telling fans to modulate . 8 8.1 START UP PRE-STARTUP After the installation is complete, a review of the following items should be performed before the system is placed into operation: Check electrical connections, fan blade set screws, fan motors, guards and all other fasteners for tightness. Be sure the thermostatic expansion valve bulb is properly located, strapped and insulated. With the system operating, check the supply voltage. It must be within +/- 10% of the voltage marked on the unit nameplate. For electric defrost systems check the defrost timer to see that is set for the correct time of day and the starting pins have been installed (normally two per day). The defrost should be scheduled for times when the freezer doors are not likely to be open. When the system is first started up, the box temperature is typically above the opening temperature of the fan delay thermostat. The fans may remain off for a lengthy period of time. To prevent this, it is permissible to install a temporary jumper wire between terminals “F” and “B” or “N” and “B” depending on the unit wiring arrangement. Once the box temperature is below +25F the jumper wire should be removed. 8.2 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. Check the room THERMOSTAT setting. Be sure it functions properly. MS Series Medium Profile Unit Coolers (E270190_H) 23 For DIRECT EXPANSION systems let the system balance out at the desired room temperature and check the operation of the expansion valve by properly measuring the superheat at the sensing bulb. As much as thirty minutes may be required for the new balance to take place after an adjustment is made. For BRINE or GLYCOL COOLING systems keep the closest vent to the coil open while the fluid fills the coil to allow trapped air to escape. Close the vent valve once fluid flows out of the valve and check for water hammer in the coil. With HOT GAS DEFROST systems allow the coil to frost, then manually advance the defrost timer to initiate a defrost cycle. Observe the defrost cycle to see if all controls are functioning properly and that the coil is clear of all frost before the system returns to refrigeration. Adjust the time clock pins if necessary. Reset the defrost timer to the correct time of day. A defrost cycle is only needed when the frost build up is such that it impedes the airflow through the coil. The defrost requirements will vary on each installation and may change depending on the time of the year and other conditions. With ELECTRIC DEFROST systems allow the coil to frost then manually advance the defrost timer to initiate a defrost cycle. Observe the defrost cycle to see if all controls are functioning properly and that the coil is clear of all frost before the system returns to refrigeration. Adjust the time clock pins if necessary. Reset the defrost timer to the correct time of day. A defrost cycle is only needed when the frost build up is such that it impedes the airflow through the coil. The defrost requirements will vary on each installation and may change depending on the time of the year and other conditions. 9 PREVENTATIVE MAINTENANCE A preventive maintenance schedule should be established as soon as the MS Series unit is installed. The unit should be inspected periodically for proper operation and build up of frost and debris. WARNING: All power supply to the unit must be shut off before opening any compartments, cleaning or performing maintenance. 9.1 DRAIN PAN Inspect and clean the drain pan to insure free drainage of condensate. The drain pan should be cleaned regularly with warm water and soap. If the drain pan needs to be removed, support the long dimension of the pan from underneath, so the outer sheet metal skin does not buckle and become damaged. Do not point load the center of the support beam. For longer pans more than one lifting device may be needed to keep the pan balanced when lifting. If the drain pan uses hot gas defrost make sure the coil is completely pumped out and isolated with hand valves to prevent refrigerant from escaping to the atmosphere. Remove electric wires if the unit has an electric defrost drain pan. Remove the drain line so that it is out of the way of the pan when it is being lowered. Remove the drain pan attachment bolts from the bottom of the evaporator unit and slowly lower the pan from the unit. Assemble pan in reverse order. 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. Summer conditions of high humidity can cause heavier frost loads and it may be necessary to change the number of defrost cycles seasonally. MS Series Medium Profile Unit Coolers (E270190_H) 24 9.3 FAN GUARD OR LONG THROW ADAPTER REPLACEMENT To remove a fan guard or long throw adapter for fan-motor maintenance, or for guard or adapter replacement, make sure all electrical power to the unit has been turned off before any work is performed. Remove the two nuts on the lowest part of the guard or adapter first. While supporting the guard or adapter to the unit remove the top two nuts. Remove the guard or adapter. Reassemble in the reverse order. 9.4 FAN REPLACEMENT If a fan is out of balance, damaged, or needs to be replaced, the unit does not need to be at floor level for maintenance. Make sure all electrical power to the unit has been turned off before any work is performed. Remove the fan guard as described in Section 10.3. Mark the location of the fan on the motor shaft. Loosen the fan hub set screws that hold the fan onto the motor shaft. Remove the fan. Clean and deburr the motor shaft if necessary. Place the new fan onto the motor shaft, tighten fan hub set screws. Reattach the fan guard. 9.5 UNIT MOTOR REPLACEMENT Make sure all electrical power to the unit has been turned off before any work is performed. The motor weight about 30 lbs. so caution when lifting is required. Remove the fan guard and fan as described in Sections 10.3 and 10.4. Remove the motor electrical cover and disconnect the motor leads and wire conduit from the motor. Mark the belly band location on the motor, then loosen the belly band bolts holding the motor. Remove motor. Transfer mark from old motor to new motor and reassemble in to the belly band. Connect the wires to the motor following the wiring schematic for the motor. Make certain the motor is wired for the correct supply voltage. Replace the motor electrical cover. Attach fan and guard as described in section 10.3 and 10.4. When starting the motor make sure the fan is rotating in the proper counterclockwise direction. If the fan rotates clockwise, stop the motor, shut off all power to the unit, and change the motor wiring for counterclockwise rotation. 9.6 ELECTRIC DEFROST HEATERS Electric defrost heater replacement on face of coil. Make sure all electrical power to the unit is off and locked out before performing any work. Open the hinged access door on each end of the MS unit. Disconnect the heater wiring at each end of the unit. Using pliers remove heater retaining clips on the face of the coil for the heater being replaced. Pull the heater out from the end of the unit with the bent end of the heater. Move identification tag from old to new heater. Install new heater in the same location as the old heater, straight end first. Install retainer clips then attach wires to terminal blocks. Run defrost cycle to make sure heaters work. Electric defrost heater replacement on bottom of coil. Disconnect drain pan line then open the hinged doors on the end of the unit. Lower the drain pan. Follow the same procedure as the coil face heaters. Electric defrost drain pan heater replacement. Disconnect drain line then open the hinged doors on the ends of the unit. Lower the drain pan. Disconnect heater wiring on both ends. Remove each retainer bracket individually starting on one end. Slightly lift the heater to be replaced and replace the retainer bracket to hold the other heaters in place. Do the same procedure along the length of the pan. Install new heater in reverse order. MS Series Medium Profile Unit Coolers (E270190_H) 25 10 TROUBLESHOOTING CHART TABLE 6: TROUBLESHOOTING PROBLEM Fans will not operate. Ice forming on ceiling. Steaming during defrost. Excessive buildup of frost on coil. Accumulation of ice in drain pan. POSSIBLE CAUSES Unit not wired properly. Defective motor. Defective defrost timer, termination thermostat or fan delay switch. Room temperature too high for use of fan delay switch. Too many defrosts per day. CORRECTIVE ACTION Check wiring. Replace motor. Replace defective component. Jumper fan delay switch. Terminals F to B. Observe frost build up on coil, change to fewer defrost per day. Defective termination Thermostat or defrost timer. Too few defrost times. Replace defective component. Add more defrost cycles to timer. Defrost cycle too short. Extend defrost time on timer. Too high humidity in cooler. Limit access to cooler, do not prop doors open during stocking. Clean drain line. Make sure drain line is insulated properly. Drain line plugged. Defective heater. Replace heater. 11 REPLACEMENT PARTS LIST FIGURE 22: – Listed below are the major replacement parts. When ordering parts, it is imperative that you obtain the complete model and serial number of the unit. MS Series Medium Profile Unit Coolers (E270190_H) 26 TABLE 7: REPLACEMENT PARTS LIST Item 1 General Description MOTOR 2 3 4 5 6 MOTOR MOUNT MOTOR RING FAN BLADE FAN GUARD ACCESS DOOR 7 WIRE HARNESS 8 9 ACCESS DOOR PART CORNER PANEL 10 FRONT AND TOP PANEL 11 DRAIN PAN Options Description 1/2HP 208/230/460/50/60/3/11440 1/2HP 575/60/3/1140 1/2 HP 115/208/230/50/60/1/1075 MOTOR-373W 120-230V 60HZ 1PH 1150-500 2-SPD 3 PH MTR 56 FRAME 20" 17 DEG CW 5/8"BORE ALUM GALV 1 FAN 2 FAN 3 FAN 4 FAN 1-4 FAN 1-4 FAN ALUM BACK SIDE LEFT 1-4 FAN ALUM BACK SIDE RIGHT 1-4 FAN GALV BACK SIDE LEFT 1-4 FAN GALV BACK SIDE RIGHT 1 FAN ALUM FRONT AND TOP PANEL 2 FAN ALUM FRONT & TOP PANEL 3 FAN ALUM FRONT & TOP PANEL 4 FAN ALUM FRONT PANEL 4 FAN ALUM FRONT PANEL PART B 4 FAN ALUM TOP PART A 4 FAN ALUM TOP PART B 1 FAN GALV FRONT AND TOP PANEL 2 FAN GALV FRONT & TOP PANEL 3 FAN GALV FRONT & TOP PANEL 4 FAN GALV FRONT PANEL 4 FAN GALV FRONT PANEL PART B 4 FAN GALV TOP PART A 4 FAN GALV TOP PART B 2 FAN ALUM NON-INSULATED 3 FAN ALUM NON-INSULATED 4 FAN ALUM NON-INSULATED 2 FAN GALV NON-INSULATED 3 FAN GALV NON-INSULATED 4 FAN GALV NON-INSULATED 2 FAN ALUM INSULATED 3 FAN ALUM INSULATED 4 FAN ALUM INSULATED 2 FAN GALV INSULATED 3 FAN GALV INSULATED 4 FAN GALV INSULATED 1 FAN ALUM 575/3 V 2 FAN ALUM 230/3 V 2 FAN ALUM 460/3 V 2 FAN ALUM 575/3 V MS Series Medium Profile Unit Coolers (E270190_H) Krack BOM Part Number 11096IN 11506IN E316796 3115921 BF0302000 80034 BF0102800 BF0202200 1112700 1112700G 80576 80577 80579 80581 E270054 E270033 E270032 E270033G E270032G E270112 E270023 E270073 E270076 E270077 E270074 E270075 E270112G E270023G E270073G E270076G E270077G E270074G E270075G CE270024 CE270025 CE270026 CE270024G CE270025G CE270026G CE270009 CE270012 CE270015 CE270009G CE270012G CE270015G CE270113 CE270000 CE270046 CE270047 27 12 THERMOSTATS 13 COIL/PAN HEATERS 14 15 DRAIN PAN HEATER BRACKET SUPPORT BRACKET 16 CHECK VALVE 17 AIR BOOSTER RELAY 240V 3 FAN ALUM 230/3 V 3 FAN ALUM 460/3 V 3 FAN AMUM 575/3 V 4 FAN ALUM 230/3 V 4 FAN ALUM 460/3 V 4 FAM ALUM 575/3 V 1 FAN GALV 575/3 V 2 FAN GALV 230/3 V 2 FAN GALV 460/3 V 2 FAN GALV 575/3 V 3 FAN GALV 230/3 V 3 FAN GALV 460/3 V 3 FAN GALV 575/3 V 4 FAN GALV 230/3 V 4 FAN GALV 460/3 V 4 FAM GALV 575/3 V DEFROST TERM (14T32) HEATER SAFETY (14T21) FAN DELAY (14T31) KP-73 1 FAN 230V 1 FAN 460V 1 FAN 575V 2 FAN 230V 2 FAN 460V 2 FAN 575V 3 FAN 230V 3 FAN 460V 3 FAN 575V 4 FAN 230V 4 FAN 460V 4 FAN 575V CE270003 CE270049 CE270050 CE270006 CE270052 CE270053 CE270113G CE270000G CE270046G CE270047G CE270003G CE270049G CE270050G CE270006G CE270052G CE270053G E206100 10956 FACE BOTTOM 1/2” 5/8” 7/8” E201818 E205004 BR01091 BR01110 BR01090 BR01095 BR01112 BR01094 BR01097 BR01113 BR01096 BR01101 BR01115 BR01100 E269334 66317 66318 11852 11853 10930 CE207243 0459304 1804241 3115218 19 10V POWER SUPPLY RELAY-30AMP DP/ST N.O. 120V RELAY TYCO T92P7A22-240V POWER SUPPLY-10 VDC HDR-15-12 20 ROOM THERMOSTAT RT 3 (Electronic) ETC111000 E206766 21 BRACKET-FRAME MOTOR 48 3097933 22 RING- FRAME MOTOR MS 48 3097934 23 HARNESS -MS VS 1F CTRL 3119823 24 HARNESS -MS VS 2F CTRL 3119824 25 HARNESS -MS VS 3F CTRL 3119825 26 27 Temp Sensor for Box HARNESS -MS VS 4F CTRL A99BC-300 TEMP SENSOR(set189a) 3119826 E205564 28 Controller for VS speed motors CTRL MODULE W/1 AO C45CPN4C 3059162 32 AUX CONTACT FOR SINGLE COMP INTERLOCK C320KG2 AUX CONT 1 NC 25-75A C320DPG01 AUX CONT 1 NC 90A E209975002 E209976002 18 MS Series Medium Profile Unit Coolers (E270190_H) 28 Part Number: E270190_F_110918 MS Series Medium Profile Unit Coolers (E270190_H) 29 ">
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