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KRACK SM Series, Operating And Installation Manual

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SM/SV-Space Master Unit Coolers (E316008_B) 

 

 

 

 

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Summary of Contents for SM Series

Page 1: ... Unit Coolers E316008_B S SM M S SV V S Se er ri ie es s S Sp pa ac ce e M Ma as st te er r U Un ni it t C Co oo ol le er rs s O Op pe er ra at ti in ng g a an nd d I In ns st ta al ll la at ti io on n M Ma an nu ua al l ...

Page 2: ...___________________ 6 6 3 EVACUATION AND LEAK TEST _______________________________________________ 6 6 4 SM GAS DEFROST PIPING ____________________________________________________ 6 7 ELECTRICAL__________________________________________________________________ 10 7 1 FIELD WIRING _____________________________________________________________ 10 7 2 ELECTRICAL DATA___________________________________...

Page 3: ...RICAL DATA ______________________________ 12 Table 8 REPLACEMENT PARTS LIST ____________________________________________________ 19 FIGURES Table 1 UNIT DIMENSIONS ____________________________________________________________ 4 Table 2 CHECK VALVES KITS___________________________________________________________ 8 Table 3 DISTRIBUTOR NOZZLE CAPACITIES TONS OF REFRIGERANT ______________________ 9 Tab...

Page 4: ... on the top two bolts to hold the guard and adapter in place Then place the remaining washers and thread the remaining two nuts on the bottom two bolts Secure with a wrench 3 RIGGING INSTRUCTIONS 3 1 RIGGING INSTRUCTIONS SM SV unit tends to be a long and heavy object with about 2 3 of the weight contained in the coil element at the rear of the unit Jobsite requirements will affect the method of mo...

Page 5: ...42 C K K 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 M 460 3 60 A Air P 575 3 60 B Brine U 380 3 50 D Electric w no pan heat Motor Type E Electric w electric pan C 3 Phase motors G 3 pipe hot gas w hot gas drain pan H 3 pipe hot gas w electric drain pan ...

Page 6: ... must be mounted so that the drain pan end is approximately 1 lower then the bottom of the electrical end of the unit If mounted to a level ceiling the hanging brackets are providing the slope Mount to ceiling with u channels provided Suspended units must have sufficient clearance above for cleaning the top Remove shipping legs after installation 6 PIPING INSTALLATION 6 1 DRAIN LINE The drain line...

Page 7: ...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 When connecting multiple unit coolers in series ...

Page 8: ...E316008_B 7 Legend Piping by Manufacturer Piping by Others CV1 Suction Check Valve CV2 Gas Inlet Check Valve CV3 Relief Check Valve TEV Expansion Valve ASC Aux Side Connector LSV Liquid Solenoid Valve See Table 2 for Check Valves Kits ...

Page 9: ...875 1985 2 CE269379 2 625 0 875 0 875 0 875 2307 2 625 0 875 0 875 0 875 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 ...

Page 10: ...4 20 11 9 8 97 7 08 5 8 20 3 15 8 12 8 10 6 9 08 25 14 9 11 3 8 91 7 3 25 5 19 9 16 1 13 4 11 4 Distributor nozzle number R 404A R 507 Evaporator Temperature F 40 20 0 20 40 40 20 0 20 40 1 9 0 09 0 07 0 05 0 04 0 04 0 09 0 07 0 05 0 04 0 03 1 6 0 14 0 11 0 08 0 07 0 05 0 14 0 11 0 08 0 07 0 05 1 4 0 23 0 17 0 13 0 11 0 09 0 23 0 17 0 13 0 11 0 09 1 3 0 3 0 23 0 18 0 14 0 11 0 29 0 22 0 17 0 14 0 ...

Page 11: ...ing 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 10 F to 12 F T D system the valve should be adjusted to maintain 5 F to 6 F superheat 7 ELECTRICAL 7 1 FIELD WIRING Field wiring should comply with NEC and local codes The power supply voltage phase ...

Page 12: ...32 5 3 1177 1304 1418 1530 1698 1843 460 60 3 265 1400 18 265 1500 3 29700 37 40 575 60 3 330 1400 18 330 1500 3 29700 29 86 230 60 3 130 1800 18 130 950 6 16200 16200 5700 40 71 40 7 14 3 4 1465 1523 1754 1769 1985 2307 460 60 3 265 1800 18 265 950 6 38100 47 80 575 60 3 330 1800 18 330 950 6 38100 38 30 230 60 3 130 1800 18 130 950 6 16200 16200 5700 40 71 40 7 14 3 4 1699 1883 2047 2052 2274 24...

Page 13: ...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 th...

Page 14: ... 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 32 F 5 When the coil reaches the temperature setting of the defrost termination thermostat 75 F for fixed Klixon the thermostat closes which allows current to flow to terminal X on the timer which energizes the switching sol...

Page 15: ...SM SV Space Master Unit Coolers E316008_B 14 Figure 7 ELECTRIC DEFROST WIRING WITH DEFROST TIMER Figure 8 E EDL Electrical Defrost Wiring 208 230 3 60 ...

Page 16: ...contacts 1 and 4 opens thus de energizing the liquid solenoid valve and the fan motors If the unit has electric drain pan heater contacts 4 and 5 close thus energizing the drain pan heater The compressor pumps the refrigerant out of the coil 2 The timer contacts 4 and 2 closes thus energizing the hot gas solenoid valve and allows hot gas to flow into the coil through a check valve and the refriger...

Page 17: ...VERSE 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 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 ...

Page 18: ...ater the other portion of the SPDT control is now closed and the drain pan heater is energized 3 When the defrost is complete the hot gas supply is stopped The liquid line solenoid is energized and the coil temperature begins to fall 4 The factory mounted thermostat senses the drop in coil temperature The SPDT thermostat opens the circuit to the drain pan heater when supplied and closed the circui...

Page 19: ...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 it 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 li...

Page 20: ...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 airflo...

Page 21: ...eplace a motor a lifting device may be required for the heavy motors Remove the fan guard and fan as described in Sections 10 3 and 10 4 The motor is wired to the disconnect switch or control panel through flexible conduit Remove the motor cover and disconnect the motor leads Unscrew the flexible conduit from the motor move the conduit out of the way For safety the motor should be supported before...

Page 22: ...erse order Rewire heaters in original terminal blocks 10 TROUBLESHOOTING CHART Table 9 TROUBLESHOOTING CHART PROBLEM POSSIBLE CAUSES CORRECTIVE ACTION Fans will not operate 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 Check wiring Replace motor Replace defective component Jumper fan ...

Page 23: ...SM SV Space Master Unit Coolers E316008_B 22 Table 8 REPLACEMENT PARTS LIST ...

Page 24: ... FAN 690220 CALL 2 FAN 690230 CALL 3 4 FAN 690240 CALL 11 ACCESS DOOR 1 2 FAN 69031 DO 4969766 3 4 FAN 69032 CALL 12 TOP PANEL 1 FAN 69033 CALL 2 3 FAN 69034 CALL 4 FAN E269492 CALL 13 FAN PANEL 1 2 FAN 69029P TP 4967704 3 4 FAN 69030P TP 4991975 14 DRAIN PAN SM 1 INNER PAN VERT DRAIN C69036 DP 4916566 SM 2 3 INNER PAN VERT DRAIN C69037 DP 4967634 SM 1 DP INS 230V H KGE EDL CE269322 DP 4967679 SM ...

Page 25: ...6 CT 4480289 FAN DELAY 14T31 E201818 CT 4480287 KP 73 E205004 CT 4480147 TSTAT A19ABC 37 PENN SPDT E312488 CT 4481734 17 COIL HEATERS 1 FAN 230V 69000 HE 4850752 1 FAN 380V E201922 HE 4850972 1 FAN 460V 69001 HE 4850254 1 FAN 575V E269546 HE 4850768 2 3 FAN 230V 69002 HE 4850255 2 3 FAN 380V E201924 CALL 2 3 FAN 460V 69003 HE 4850256 2 3 FAN 575V E201305 HE 4850816 4 FAN 230V E269502 CALL 4 FAN 38...

Page 26: ...8 11086 MO 4410727 1 5 8 E150087 VR 4612316 2 1 8 E205552 CALL 23 SHIPPING LEG GLV 3 563 X 19 25 21776P TP 4915354 24 1X2 25X2 5 HINGE ZP 69113 HH 4914888 25 CHECK VALVE KIT 0 5 CE269381 CALL 0 875 CE269382 CALL 1 125 CE269383 CALL 1 625 CE269377 CALL 2 125 CE269378 CALL 2 625 CE269379 CALL 2 625 CE269380 CALL 26 AIR BOOSTER CE269292 TP 4967623 ...

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