LTH - Hussmann
Contents
1. z LI 115VAC 60HZ 1PH E 115VAC 60HZ 1PH I D Model LTH 18 Model LTH 18 Safe NET Safe NET Ill 1 ate U in Y 1 LA 7 i w BK 1 w I LOW VOLTAGE TRANSFORMER 7 1 w 9 6 CONTROL SENSOR DEFROST TERM i Dn DEF FAN COMP 1 SARENET unenee HA H E 7 l is 9 1 CONTROL DIL BK 1 yt wl SENSOR CONTROL i E Pore GRAY 1 2 000099 1 DIGITAL 1 Il w d 1 LA vm DISPLAY 141 DEFROST LIMIT BR OR BK BK d y BK E T r akak COY AAAAAG 1 DEFROST HTR LIMIT BK i ii 0 e A EVAP FANS 0 NI N V DEFROST RELAY SENSORS n T i EVAP FANS Th l 44 4 1 fred US rb n 1 DEFROST St N DOOR SWITCH DIGITAL f TERM FAN DELAY SW DISPLAY ty PE 1 1 DOOR SWITCH i A2. r D k D i i Model LTH 45 Model LTH 45 2oszzovac sonz 1PH 208 230VAC 60HZ 1PH 1 Sg amp LTH 68 with amp LTH 68 with wz put T TM Safe NET Safe NET III LI FT eh E 1 1 w BK 1 ne LOW VOLTAGE TRANSFORMER 5 1 1 I 4 1 SAFE NET Ill CONTROL SENSOR DEFROST TERM H 1 SAFE NET I n H Y r CONTROL p SENSOR CONTROL 1 F Tiamo i N GREY H DOO OQ d P j I LI we E BR oR BK BK 42 BK BL W 1 DIGITAL DISPLAY D BK BK ji TT H SENSORS D FAN DELAY 7 7 1 i esee Y 1 G 1 ELS DEFROST L1 2 DIGITAL TERM 7 DISPLAY 1 OU ee eee 1 LI 8 H LI LI A LI 1 U EVAP FANS EVAP FANS DOOR SWITCHES L1 4 SS ER w e 1 WWW w 2 180 4 DEFROST LIMIT DEFROST HTR 5 gje d NO ONLY WHEN REVERSING T COND FAN IS USED TIME DELAY BK COMPRESSOR RELAY 2 K 6 7 o w x 2
3. aR KC DON E i 1 1 115VAC 60HZ 1PH ds 115VAC 60HZ 1PH d Model LTH 18 Model LTH 18 U Safe NET 1 afe dy i 4 w BK w BK 1 LOW VOLTAGE TRANSFORMER UD Li w n 9 SAFE NET III CONTROL SENSOR DEFROST TERM 1 NOU DEF FAN H ee 1 1 K n SENSOR CONTROL CONTROL r lt BK w w GRAY Ln 1 990006 DOO 1 cum DIGITAL H ll w sa DEFROST LIMIT BR oR BK BK J DISPLAY i BK w 2 F n WVHA BK D 1 DEFROST HTR LIMIT M BK FANS LAAAA A G t emos E DEFROST RELAY SENSORS n Y 1 EVAP FANS um l eo CENTER L1 1 DEFROST e N DOOR SWITCH DIGITAL H f TERM 0 FAN DELAY SW DISPLAY r gyi n 1 d 1 1 1 DOOR SWITCH Y 1 mm m m mm m m m m m m m
4. WAWA HUSSMANN CORPORATION gt BRIDGETON MO 63044 2483 U S A e WWW HUSSMANN COM LTH Manual A 10 APPENDIX WIRING DIAGRAMS LTH 8S with optional LEDs c ee COLE LLLI LL ECCLE 115 60 2 1 115 60 2 1 Model LTH 8S s Model LTH 8S N L1 N L1 Safe NET Ng Safe NET III 577 LI LJ Ba i 5 U LI w BK w BK i 5 LOW VOLTAGE TRANSFORMER a SAFE NET Ill CONTROL 1 w DEF FAN COMP SENSOR DEFROST TERM SAFE NETI name B gek H 9 CONTROL REVERSE FAN 4 SC GRAY BELAY 5006000900 SENSOR CONTROL mi ne p Bk 3 1 DIGITAL 5 5144 w DISPLAY DEFROSTHTR LIMIT Q 7 BR oR Bk Bk BK 1 H 9 w GH f 7 D VV T BK oc lod 1 DEFROSTHTR LIMIT 1 i BK
5. includes but is not limited to such items as doors lights fans heaters and thermostats REPLACING FLUORESCENT LAMPS Fluorescent lamps have a plastic shield When the lamp is replaced keep the lamp shield to install over the new lamp The switch under the display lamp cover oper ates both the display lamp and interior lamps Plastic Shield Fluorescent Lamp a Remove Plastic Pins Attaching Display Lamp REPLACING DISPLAY LAMP Disconnect power to the merchandiser Remove plastic pins attaching the display lamp panel There are three pins at the bottom of the display cover and two on top of the display panel Remove the merchandiser s display cover panel and change out the lamp Replace the display panel cover Display Gover Panel Removed HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A LTH Manual 5 2 Service REPLACING INTERIOR LAMPS LTH merchandisers have Interior case lamps The lamps are protected by a clear plastic shield Remove the shield to replace lamp Wedge a small putty knife at the top rear of the lamp then carefully loosen the shield from the side of the merchandiser 3 D Wedge Putty Knife at Top Rear of Display Lamp Once the shield is out of rear track the lamp shield can be removed from the merchandiser Remove lamp shield and change out lamp Replace lamp shield at bottom corner bracket first
6. LOAD LIMITS Product must be within designated load limit Load Limit for LTH 18 LTH 45 and LTH 68 to ensure proper refrigeration and air curtain Merchandisers performance At no time should product be stocked Beyond the front of shelves e Near the air exhaust duct located at the top rear of case Near or covering the front return air grille Within four inches of the top of the cabinet This space must he free of product and other materials DO NOT LOAD CASE WITH WARM PRODUCT HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A LTH Manual 1 8 Installation P N 0506146 D U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 WWW HUSSMANN COM P N 0506146_D 2 1 ELECTRICAL REFRIGERATION PLUG ALWAYS CHECK THE SERIAL PLATE FOR The plug cord is 9 ft long and is located on the COMPONENT AMPERES right hand rear of the merchandiser Fluorescent Disconnect power before servicing LTH merchandisers require a dedicated electrical circuit with ground 12AWG is the minimum Gei 6 un sized acceptable wire NEMA 5 15R NEMA 6 15R NEMA 6 20R Receptacle Receptacle Receptacle LTH 8S LTH 45 LTH 68 LTH 18 WARNING LED Merchandiser must be grounded Do not remove the power supply cord ground Fluorescent NEMA L5 15P NEMA L6 15P NEMA L6 20P Locking Locking Locking
7. 3 2 Escape I estu suwasqa 3 2 Safe NET I Defrosts 3 2 Set Defrost Time Safe NET I 3 3 Alarms Safe NET D 3 4 Sequence of Operation Safe NET 1 3 5 Table of Contents Continued on next page HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A LTH Merchandisers vi APPENDIX A TECHNICAL DATA Part Numbers 1 Cross Section Refrigeration Data A 4 Merchandiser Dimensions A 5 Electrical Data A 6 LTH 8 Wiring Diagrams A 7 LTH 18 Wiring Diagrams A 8 LTH 45 68 Wiring Diagrams A 9 LTH 8 LED Wiring Diagrams A 10 LTH 18 LED Wiring Diagrams 11 LTH 45 68 LED Wiring Diagrams 12 WARRANTY REVISION HISTORY Revision D December 2010 Added Air Flow Drawing Page 1 2 Added Model Description Page 1 3 Added Serial Plate Location Page 1 5 Revised Stocking Illustrations Page 1 7 Added Sequence of Operation Diagram Page 3 5 Added Appendix A Revision C June 2009 Added LTH 45 and LTH 68 models Updated wiring diagrams Added Safe NET I codes Added Safe NET III information Revision B Added Safe NET Restructured manual added Maintenance information Revision A Original Issue P N 0506146 D amp amp amp amp ANSI Z535 5 DEFINITI
8. A 9 qme meme we mmm eR Mmmm NM RE ee NE EE ENS NN MN M mM MS EU d Model LTH 45 Model LTH 45 208 230VAC 60HZ 1PH 208 230VAC 60HZ 1PH 1 ueni fats amp LTH 68 with amp LTH 68 with Safe NET Safe NET III D w BK 1 LI Sg LOW VOLTAGE TRANSFORMER w SAFE NET CONTROL SENSOR DEFROST TERM 1 SAFE NET I t 1 CONTROL 7 Ta SENSOR CONTROL EE w amp 20 T I op 9000 ED en BR OR BK BK T DIGITAL DISPLAY BK BL M BK BK SENSORS FAN DELAY Ge M SS 19 Lp o 4 H WARNING All components must L2 EVAP FANS mechanical ground and the 1 7 merchandiser must be vd grounded w e F 4 WWS 8 DEFROST LIMIT red ac Ser NO ONLY WHEN REVERSING ii rm COND FAN IS USED TIME DELAY BK COMPRESSOR RELAY 2 K O 1 T w 1 2 N COMPRESSOR RE BK 4 Se ee A n
9. smooth BK cw ane 7 La smooth BK cw ONLYWHEN STANDARD t pl H 8 2 COND FAN STANDARD AND REVERSING REVERSING ONLY WHEN REVERSING REVERSING IS USED COND FAN RELAY COND FAN IS USED COND FAN ONLY WHEN STANDARD RIBBED W COMMON COND FAN IS USED Mere REVERSING RELAY OVERLOAD FAN RELAY e w fx OVERLOAD GO RUN START CAP RUN START CAP CAP w R CAP w COMPRESSOR COMPRESSOR CASSETTE LEFT CASSETTE RIGHT T LH n SIGN LAMP LTH 68 iro roy SIGN LAMP LTH 68 W I 1 pes eon wi W LIGHT INTERIOR LAMP SWITCH BALLAST BK 2 9 INTERIOR LAMP INTERIOR LAMP SIGN LAMP 45 INTERIOR LAMP 68 L w VANNNNNNNNNNNNNNSNSNNNSNSNSNSNSNSNSNSNSNSNSNSNSNNI BK 9 w J WW AA BK t BK DOOR PERIMETER HEATERS 2 LTH 5 3 LTH 68 SAFE NET III BK ONLY w BK d 4 DIODE le be l MODELS WITH PL PAA NAA HEATED GLASS E E SAFE NET I FRAME HEATER RS X EN i ONLY E gt gt HEATED GLASS RON H Models LTH 45 and LTH 68
10. LTH 8S and LTH 18 require a dedicated 04 erected 15 AMP 115V circuit with grounded wall LTH 8S LTH 45 LTH 68 LTH 18 receptacle NEMA 5 15R The LTH 45 requires a dedicated 15 AMP 208 230V circuit with a grounded wall receptacle NEMA 6 15R CA UTI O N The LTH 68 requires a dedicated 20 Risk of Electric Shock If cord or plug AMP 208 230V circuit with a grounded wall becomes damaged replace only with receptacle NEMA 6 20R a cord and plug of the same type Always use a dedicated circuit with the amperage stated on the unit Nominal MAH LEDs Voltage Voltage Voltage The LTH 8S and LTH 18 require a dedicated 120 108 132 15 115 V circuit with grounded wall receptacle NEMA L5 15P 208 230 188 253 The LTH 45 requires a dedicated 15 AMP 208 230 V circuit with a grounded wall receptacle NEMA L6 15P The LTH 68 requires a dedicated 20 AMP L N WAR N 208 230 V circuit with a grounded wall LOCK OUT TAG OUT EE To avoid serious injury or death from electrical shock always disconnect the electrical power at the main disconnect when servicing or replacing any electrical component This includes but is not limited to such items as doors lights fans heaters and thermostats Plug into an outlet designed for the plug Do not overload the circuit Do not use long or thin extension cords Never use adapters f in doubt call an electrician
11. Nuca aoaaa ma 5 Gu DR cR Dn Qa iq as Q ve RR RR RD Bm mm m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m Onen REESE COND FAN SUED N w See 1 Zr COMPRESSOR NO I CENTER CW n RELAY 7 Bis Woo ajA EE E E ONLY WHEN REVERSING lt NC C I COND FAN IS USED REVERSING H 7 J STANDARD AND BK COND FAN H REVERSING COND V FAN IS USED RIBBED W COMMON REVERSING RELAY SMOOTH BK cw RELAY OVERLOAD A 5 ONLY WHEN REVERSING COND FAN IS USED RUN START CAP CAP Lw R COMPRESSOR w R BK INTERIOR LED 71 ee INTERIOR LED BK 9 SWITCH SAFE NET I ONLY R POWER SIGN LED BL SUPPLY W ANNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNI BK 39 SR DOOR PERIMETER HEATER A ONLY w BK Z DIODE MODELS WITH FRAME HEATER GLASS SAFE NET I ONLY ONLY HEATED GLASS Model LTH 18 WARNING All components must have mechanical ground and the merchandiser must be grounded CIRCLED NUMBERS Parts List ITEM NUMBERS Y Yellow G Green BL Blue BK Black W White 120V Power O 120V NEUTRAL 1 Ftp Group mm CASE GROUND HUSSMANN CORPORATION BRIDGETON MO 63044 2483 U S A e WWW HUSSMANN COM LTH Manual A 12 APPENDIX WIRING DIAGRAMS LTH 45 and LTH 68 with optional LEDs
12. 1811 34 liters case ESTIMATED SHIPPING WEIGHT Case LTH 8S 310 Ib 141kg LTH 18 535 Ib 243kg LTH 45 1014 Ib 460kg LTH 68 1036 Ib 470kg 2 Actual weights will vary according to optional kits included P N 0506146 D U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 WWW HUSSMANN COM APPENDIX WIRING DIAGRAMS A 7 1 115VAC 60HZ 1PH 115VAC 60HZ 1PH Model LTH 8S Model LTH 8S N L1 N L1 1 d Safe NETTM Safe NET III LA 1 1 1 1 w BK w BK 1 i LOW VOLTAGE TRANSFORMER i SAFE NET CONTROL 1 e w DEF 1 SENSOR DEFROST TERM SAFE NETI Kane P 8 CONTROL REVERSE FAN i i ramum GRAY e RELAY 3600060 9 SENSOR CONTROL ae p ak 1 g 1 prev DIGITAL E T DISPLAY DEFROSTHTR LIMIT pR oR Bk BK BK w 7 Ft 7 BK h u BK BL w 4 T B DEFROSTHTR LIMIT EVAP Li A T 1 i WV 1 DEFROST M c RELAY SE
13. Defrost Cycle is Temperature Terminated and Will Terminate Immediately When Warm 0ff Compressor L Start Up Off Cycle Sequence of Operation LTH Merchandisers e Apply power to the case Wait for the self check to complete During the Self Check The compressor will start 10 seconds after the power is applied The compressor will continue to run until it reaches its cut out temperature pull down The refrigeration cycle will continue until the next scheduled 8 hours and will repeat until power is interrupted o If power is interrupted sequence will start at CD Clock starts as power is lost Follow steps to adjust clock as necessary Display shows SAFE NET NOTE For Safe NET versions 9 04 or higher the current temperature will be displayed HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A LTH Manual 3 6 START UP OPERATION OPERATING Safe NET III CONTROLS The Safe NET III electronic temperature and defrost controller is located in the cassette compartment The controller comes factory set at position 5 and is ready to go 2 3 Safe NET II Controller Location The front grille must be removed in order to access this control To remove the grille open the door and remove the two plastic screws and retainers on the top of the grille then tilt out and lift up to remove 2 5 8 Remove Plastic Screws When removin
14. Press select to confirm entry The Defrost start time is now set HH MM StAr Replace Safe NET I Cover Position the cover over the display and gently press into place LTH Manual 3 4 START UP OPERATION ALARMS Safe NET I Only A red LED on the board turns on during alarm The display will show a four character word for about 3 seconds alternating with the default display for 9 seconds Alarm with Sensor Number SEnS This alarm is generated when the control is ini tialized and indicates that the number of sen sors entered in the control is different from the number of sensors connected to the control This Alarm can be cleared only by changing the reading for number of sensors to 0 and resetting the display module or by pressing the SELECT button while the display is showing SAFE NET during power up which then updates the reading to the number of sensors connected This is caused by the control not being set up correctly or by a sensor having failed If the problem persists call an author ized technician Alarm with Sensor reading noSn This alarm is generated when the display module is unable to read the sensors for five consecu tive seconds This may be caused by a sensor being disconnected or shorted This alarm clears automatically when the control is able to read the sensors If the problem persists call an authorized technician P N 0506146 D Disch
15. Return the control knob to its original setting Step 1 once the manual defrost has been initiated P N 0506146 D U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 WWW HUSSMANN COM P N 0506146_D Sate NET 4 O o si Safe NET III Control OFF Position Set at Full Cold Position 3 9 Display at Full Cold Model LTH Safe NET 4 O o O OM WARM COLD Safe NET III Control 1 Position TEMPERATURE ADJUSTMENT 1 Rotate the adjustment knob counter clock wise for a warmer setpoint or clockwise for a colder setpoint 2 While adjusting the temperature the display shows the setpoint cut out value A few seconds after the temperature is set the controller reverts to the sensed temperature in the merchandiser 3 To verify merchandiser settings turn the dial to warm and cold as shown above Output readings should be within one degree of the temperatures shown above HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A Display at 1 Position Model LTH The control has protective settings to prevent short cycling of the compressor A The compressor may run for up to 60 sec after Step 2 15 completed Start the 10 sec count down for Step 3 once the display 15 blank B The defrost initiation may be delayed for up to 120 sec after S
16. controller Controller is not operating e Call Service immediately Red LED turns on during operation e Case temperature is too warm or too cool Make sure the door is closed Make sure that cold air is not being blocked or deflected Check the temperature using the optional display or a thermometer f the LED does not turn off after on hour call Service Red LED flashes Temperature sensor failure e indicates a case temperature failure E2 indicates an evaporator temperature sensor failure Check the optional display for error code E1 or E2 and call Service immediately LTH Manual 3 8 START UP OPERATION DEFROST TERMINATION SWITCH Merchandisers may use a defrost termination switch instead of an evaporator sensor to terminate a defrost cycle The defrost termination switch is temperature activated and senses the completion of defrost Compressor Compressor Off Time If On Time If Sensor Failed Sensor Failed On Compressor Status Off On Off On Off lt Time MANUAL DEFROST 4 Note ped ele W o This procedure initiates a manual or forced 2 defrost Warm Cold 1 Note location of knob setting d Rotate knob fully counterclockwise until it stops full warm OFF position After 10 seconds but before 20 seconds rotate knob fully clockwise until it stops full cold position IMPORTANT
17. the grille for this operation or for condenser cleaning care must be taken not to damage the display Interface cable It may be unplugged during this task AN Gs Interface Cable Plug Unplug Interface Cable P N 0506146 D The temperatures can be adjusted by rotating the knob counter clockwise for a warmer set point or clockwise for a colder setpoint The display shows the setpoint for a few seconds when changed then reverts to showing the sensed temperatures in the merchandiser The adjustment knob allows the user to select a pre configured cold setpoint warm setpoint or any setpoint within this range The adjustment knob is also configured with OFF ON function ality to power off the controller The off position shuts off the compressor only UNPLUG THE UNIT FOR SERVICE Safe NET 11 5 5 uussmanm lt ET poo COLD Remove Plastic Screws The top or green LED indicates the case is in refrigeration mode The center or yellow LED indicates the case 15 in defrost mode The bot tom red LED indicates an alarm condition such as merchandiser warming up because the door 15 not closed Compressor Powered on GREEN Defrost Cycle YELLOW Alarm RED Off On Position Safe NET III Indicators U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 e WWW HUSSMANN COM P N 0506146_D START UP OPERATION The defrost cycle is initiated
18. 1 TL D 1 LI T 0 WV DEFROST 10 Fog G c RELAY SENSORS pon 1 pos RENE o UNT 1 vo E OO LABES See DISCHARGE E l EVAP FAN CENTER Ets up cem O i H DEFROST DIGITAL 1 DEFRO DOOR SWITCH d DISPLAY pog DOOR SWITCH 22 1 T sau D CM ONLY WHEN REVERSING ONLY WHEN REVERSING COND FAN IS USED L cn COND FAN IS USED w PEEL Mea qc Em COMPRESSOR ger BK 25 E BK COND FAN RELAY w _ START CAP RUN CAP COMPRESSOR w LIGHT POWER Ro INTERIOR LED supply SWITCH DOOR PERIMETER HEATER 4 w A A AAA AA AA AA AA AA 8k SAFE NET III ONLY DIODE 4 N MODELS WITH CR FRAME HEATER HEATED GLASS N N ONLY SAFE NET I HEATED GLASS ONL Model LTH 8S WARNING All components must have mechanical ground and the merchandiser must be grounded CIRCLED NUMBERS Parts List ITEM NUMBERS Y Yellow G Green BL Blue BK Black W White 120V Power 120V NEUTRAL l FIELD GROUND mm CASE GROUND P N 0506146 D U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 WWW HUSSMANN COM APPENDIX WIRING DIAGRAMS A 11 LTH 18 with optional LEDs
19. 10 Second Delay Until Compressor Starts Pull down Refrigeration Compressor Cycle On Pull down After Refrigeration Defrost Cycle Compressor On Maximum Defrost Time 45 Minutes Fail Safe Maximum Defrost Time 45 Minutes Fail Safe Defrost Cycle Will Terminate Once the Termination Temperature is Reached if Case is Cold Turned Off and Back On Defrost Initiates at Start Up Defrost Cycle is Temperature Terminated and Will Terminate Immediately When Warm Defrost Cycle Terminates Once the Termination Temperature is Reached 48 F Off Compressor Start Up Off Cycle Sequence of Operation LTH Merchandisers D Apply power to the case Wait for the self check to complete During the self check each LED flashes for 1 second and then all LEDs turn on for two seconds MPORTANT If the LEDs do not flash make sure that adjustment knob is not in the OFF position If the adjustment knob is in the OFF position the display will also be blank 1a If the case is warm at initial start up the defrost will be initiated and will terminate almost immediately The display will show dF until the defrost unlock time expires even though refrigeration has been initiated The green LED will be ON 1b If the case is cold as if it is turned off and then back on the defrost cycle will continue until the termination temperature is reached or the fail safe time has expired The compr
20. 4330346 GA 4330346 HH 4916436 A 3 Description Door Handle Door Assembly LTH 8S Door Assembly LTH 18 Door Assembly Right LTH 45 Door Assembly Left LTH 45 Door Assembly All Left LTH 68 Door Gasket LTH 8S Door Gasket LTH 18 Door Gasket LTH 45 Door Gasket LTH 68 Torsion Rod All Models LTH Manual A 4 APPENDIX TECHNICAL DATA Dimensions shown as inches and mm LTH 18 shown below Note This data is based on store temperature and humidity that does not exceed 80 and 55 R H unless otherwise stated Schedule defrost at night while lights are off P N 0506146 D REFRIGERATION DATA LTH 8S LTH 18 LTH 45 LTH 68 Thermostat Setting CIICO F All Models Position 1 5 F 5 F Positions 7 18 F 28 F Compressor hp LTH 8S 2hp LTH 45 2hpx2 LTH 18 1 hp LTH 68 3 4hp x2 Condensing Unit Capacity LTH 8S 1834 LTH 18 2376 LTH 45 1834x2 LTH 68 2376 2 at 30 F evaporator and 110 condenser temperature DEFROST DATA Frequency hr 8 OFFTIME Failsafe minutes All models 50 Defrost Termination Temperature F 48 PHYSICAL DATA Refrigerant Charge LTH 8S 10 oz 0 283 kg LTH 18 17 oz 0 482 kg LTH 45 12 oz LTH 68 15 oz 0 340 kg each cassette 0 426 kg each cassette U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 e WWW HUSSMANN COM APPENDIX TECHNICAL DATA A 5 LTH Dimensions Dimensions in inc
21. HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A LTH Manual 2 2 Electrical Refrigeration REFRIGERATION Each LTH merchandiser will have either Safe NET I or Safe NET III controls If the display looks like this you have a Safe NET control Safe NET 1 Control If the display looks like this you have a Safe NET control Safe NET III Control P N 0506146 D All LTH merchandisers are equipped with a hermetic compressor The condenser has a fin and tube construction Cold discharge air flows from the top air duct on the back of the case Air is returned through the bottom front return air grille DEFROST CYCLE All LTH merchandisers require defrost cycles for proper operation The defrost cycles are factory set Merchandisers are set to defrost three times each day During defrost the evaporator fans operate intermittently to clear any condensa tion from the interior side of the door Defrost is initiated by Safe NET I or Safe NET III control and is terminated according to coil temperature In the event the sensor does not terminate the defrost cycle a fail safe value is programmed to terminate on time All LTH merchandisers are factory set with three defrost cycles every 8 hours For merchandisers with Safe NET I defrosts are programmed to start at 0600 1400 and 2200 The defrost times can be changed with the Safe NET I control The clock should be adjusted after the unit Is plugged in see ins
22. Remove Shield from Display Lamp For LEDs follow the same steps to remove the shield Then pull out the LED fixture respecting the fixture position Next bow lamp shield and replace shield into top corner bracket Smooth shield to ensure a good replacement fit for the lamp shield P N 0506146_D TE Bow Shield to Replace REPLACING ELECTRONIC BALLASTS The electronic ballast or LED power supply for the LTH 8S is located on the refrigeration cassette This ballast operates the interior lamp The electronic ballast or LED power supply for the LTH 18 LTH 45 and LTH 68 is located on the top of the merchandiser under a sheet metal enclosure LTH 68 shown To access the ballast or LED power supply the protective enclosure is removed by removing screws as shown below Remove Screws from Enclosure s E Ballast Location U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 WWW HUSSMANN COM APPENDIX TECHNICAL DATA Item Part LTH SS 18 MO 4410966 LTH 45 68 MO 4410927 FB 4780826 CT 4483046 CC 4482538 CC 4482537 CC 4482540 EP 4482541 195216 4441450 EP 4441442 EP 4441816 EP 4441818 EP 4441819 REFRIGERATION 85 4671412 CU 4200702 Description FAN ASSEMBLIES AND THERMOSTATS Evaporator Fan Motor 115V 60Hz Evaporator Fan Motor 208 230V 60Hz Evaporator Fan Blade Electronic Control Safe NET III Defrost Sens
23. T COMPRESSOR RELAY NO BK IE A X 4 suoni BK cw louvween STANDARD 6 7 7 7 BK cw HI H 1 L z COND FAN ISUSED REVERSING ONLY WHEN REVERSING REVERSING L COND FAN IS USED Bk SOND FAN RIBBED W COMMON STANDARD AND REVERSING COND FAN ONLY WHEN STANDARD COND FAN IS USED Reseo W common RELAY OVERLOAD COND FAN RELAY uem f w 0 24 OVERLOAD GEI RUN START CAP RUN START CAP CAP w R CAP w Cp COMPRESSOR e COMPRESSOR CASSETTE LEFT CASSETTE RIGHT IT T SIGN LED LTH 68 Te m SIGN LED LTH 68 Ve LR POWER Li supply m w LIGHT INTERIOR LED Fer 5 SWITCH POWER SUPPLY BK 4 BK INTERIOR LED aT R INTERIOR LED Eege SIGN LED 45 INTERIOR LED 68 Fai w VANAAANA ARARARARAARNAAAAAPAAAAAAAAAA BK 9 w JV A N N N N AAA AAA BK BK DOOR PERIMETER HEATERS 2 LTH 5 3 LTH 68 SAFE NET Ill w AWA A AA A A A A BK 0 ONLY w E BK d e 4 DIODE e W J MODELS WITH m Sa HEATED GLASS 1 E SAFE NET E FRAME HEATER N ony N ONLY E H E B HEATED GLASS 200088 ON B 0008 on Models LTH 4
24. at power on This cycle will quickly terminate on the initial start up of a warm merchandiser Another defrost cycle will follow every 8 hours thereafter The defrost times will reset whenever power is inter rupted Therefore the standard defrost times can be reset by interrupting power full stop then start at the desired time This will reset the initial time and restart the 8 hour cycle During the compressor on time 1 minute or compressor off time 2 minutes built in protection time will delay the defrost initiation If you force a defrost cycle during this time the feature will initiate but not start until the compressor protection mode times out ALARMS AND CODES Safe NET III is available with an audible alarm located in the display module that sounds in the event a failure occurs FLASHING TEMPERATURE OR SENSOR ALARM LED 2 If the Temperature or Sensor Alarm LED red on the controller and display is flashing a temperature sensor has failed or sensor is disconnected The display shows if the case sensor has failed or disconnected or E2 if the evaporator sensor has failed it 15 disconnected If the merchandiser sensor fails refrigeration will run continuously Turn off or repeat a duty cycle of a few minutes on and a few minutes off HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A Troubleshooting Red LED remains ON after startup Indicates Firmware corruption on
25. bottom nut while holding the upper nut in place Torque bottom nut to a minimum of 20 ft lb Adjust Door Closing Torque HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A LTH Manual 1 6 Installation SHELF INSTALLATION After the cabinet 1s leveled the shelves may be installed Wire shelves are adjustable Shelf spacing can be adjusted by positioning the shelf clips according to individual loading requirements Door LTH 8S merchandisers have three movable wire Lock shelves and one solid shelf LTH 18 LTH 45 and LTH 68 merchandisers have four movable wire shelves and one solid shelf per door NOTE The movable wire shelves may be reversed so that the wire shelf lip is positioned in the front as a product stop GH NOTE Do not move the Solid Shelf at the front of case LAMPS This merchandiser has a light switch that operates both the display and the interior 8 lamps Interior lamps equipped with plastic shield for safety DOOR SWITCH The merchandiser s door switch controls the evaporator fan motor The switch shuts the i evaporator fan off when the door is opened Display Lamp with Cover Removed This reduces energy consumption and helps prevent product temperatures from increasing from the door being opened and closed P N 0506146_D U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 WWW HUSSMANN COM P N 05061
26. condenser fan you may notice the condenser fan running during the defrost cycle This is normal in this application The purpose of reversing the air direction during defrost is to remove lint and dust that accumulates on the condenser fin surfaces during the refrigeration cycle This feature reduces the need to clean the condenser manually and increases compressor life because of lower condensing temperatures L INFORMATION For prompt service when contacting the factory be sure to have the case model and serial number from the case serial plate Ne Bi WARNING LOCK OUT TAG OUT To avoid serious injury or death from electrical shock always disconnect the electrical power at the main disconnect when servicing or replacing any electrical component This includes but is not limited to such items as doors lights fans heaters and thermostats LTH Manual 4 4 Maintenance Cleaning the Wash Out Drain The wash out drain is located behind the refrig eration cassette and can be cleaned with water and wiped with a soft cloth Ensure drain is unobstructed before replacing cassette Wash Out Drain The washout drain flows into an auxiliary waste line Next remove the auxiliary waste line cap to drain any excess water Place a dry towel over the line to absorb water Replace cap cables and cassette Auxiliary Waste Line Replace Cap Cables an
27. in Clearance at Front LTH 68 36 in m Air S 2 SS Intake Plan View eer SSS Air Intake N Zero Clearance at Sides and m 36 in Clearance at Front U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 e WWW HUSSMANN COM P N 0506146_D UNLOADING Unloading from Trailer Lever Bar also known as a Mule Johnson Bar J Bar Lever Dolly or Pry Lever Move the merchandiser as close as possible to its permanent location and remove all packaging Check for damage before discarding packaging Remove all separately packed accessories such as kits and shelves Improper handling may cause damage to the merchandiser when unloading To avoid damage 1 Do not drag the merchandiser out of the trailer Use a Johnson bar mule 2 Use a forklift or dolly to remove the merchandiser from the trailer A CAUTION Do not walk or put heavy objects on case EXTERIOR LOADING Do NOT walk on top of the merchandiser or damage to the merchandisers and serious personal injury could occur MERCHANDISERS ARE NOT STRUCTURALLY DESIGNED TO SUPPORT EXCESSIVE EXTERNAL LOADING such as the weight of a person Do not place heavy objects on the merchandiser HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A 1 3 SHIPPING SKID Each merchandiser is shipped on a skid to protect the merchandiser base and to make positioning the case easier Remove the top of the crate and de
28. 46_D 1 7 STOCKING Product should NOT be placed in case until merchandiser is at proper operating temperature The LTH merchandisers must remain in operation for at least 24 hours before product may be within loaded into case cabinet Proper rotation of ineties product during stocking is necessary to prevent product loss Always bring the oldest product to the front and set the newest to the back AIR EXHAUST AND RETURN GRILLE MUST REMAIN OPEN AND FREE OF OBSTRUCTION AT ALL TIMES Do not allow product packages signs etc to E block air exhaust return grille Do not use Load limit for UTH 8S Merchandisers non approved shelving baskets display racks or any accessory that could hamper atr curtain performance Do NOT STOCK PRODUCT IN THE TOP FOUR INCHES OF LTH CASES BECAUSE PRODUCT WILL BLOCK THE COLD AIR FLOW NO PRODUCT within CONDENSING UNIT AIR FLOW 4 inches of top optional reversing condenser fan 15 available for all LTH models The condenser fan runs in reverse during the defrost cycle to clear the condenser coil of debris that was accumulated during the refrigeration cycle
29. 5 and LTH 68 VARA P N 0506146 D U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 WWW HUSSMANN COM To obtain warranty information or other support contact your Hussmann representative Please include the model and serial number of the product U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 www hussmann com Hussmann Corporation Corporate Headquarters Bridgeton Missouri U S A 63044 2483 01 July 2008 Hussmann Corporation 12999 St Charles Rock Road Bridgeton MO 63044 2483 www hussmann com
30. HUSSMANN 7 LISTED LTH Low Temperature Merchandisers k Installation amp Service Manual IMPORTANT Keep in store for P N eee future reference P N 0506146_D ill ATTENTION Merchandiser must operate for 24 hours before loading product Regularly check merchandiser temperatures Do not break the cold chain Keep products in cooler before loading into merchandiser These merchandisers are designed for pre frozen products only IMPORTANT KEEP IN STORE FOR FUTURE REFERENCE Quality that sets industry standards H u 5 5 m n n n 12999 St Charles Rock Road Bridgeton MO 63044 2483 U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 www hussmann com 2010 Hussmann Corporation TABLE OF CONTENTS V ANSI DEFINITIONS vi INSTALLATION NSF Certification 1 1 OPERATING SAFE NET CONTROLS 3 6 Hussmann Product Control 1 1 Start Up Operation 3 7 Location to fib Sar iS ia dee bas 1 1 Alarms and Codes 3 7 Shipping Damage 1 1 Defrost Termination Switch 3 8 Self Contained Location 1 2 Manual Defrost 3 8 Unloading Oh a Sh pros dues 1 3 Temperature Adjustment 3 9 Exterior Loading 1 3 Sensor to Control Configuration 3 10 Ship
31. NSORS pom a Ue L1 01777555 E Y EVAP FAN CENTER 2 Ar EM i DIGITAL yu i DOOR SWITCH Fog DISPLAY pog gt Ne Y 1 i DOOR SWITCH bog H 12 mm mm eee ba slk PPP fe mm mm mm mm mm ONLY WHEN REVERSING COND FAN IS USED ONLY WHEN REVERSING COND FAN IS USED START COMPRESSOR w INTERIOR LAMP LIGHT BALLAST SWITCH DOOR PERIMETER HEATER amp w A A AAA A AAA A WA A AA AWAAAAW ui s s SAFE NET III ONLY DIODE w e BK MODELS WITH prp FRAME HEATER HEATED GLASS d ONLY Se SAFE NET I ONLY Model LTH 8S WARNING All components must have mechanical ground and the merchandiser must be grounded CIRCLED NUMBERS Pants List ITEM NUMBERS Y Yellow G Green BL Blue BK Black W White HEATED GLASS 120V Power O 120 NEUTRAL FIELD GROUND CASE GROUND HUSSMANN CORPORATION BRIDGETON MO 63044 2483 U S A e WWW HUSSMANN COM LTH Manual A 8 APPENDIX WIRING DIAGRAMS
32. ONS situation which if not avoided will result in death or serious injury DANGER Indicate s a hazardous WARNING Indicate s a hazardous situation which if not avoided could result in death or serious injury CAUTION Indicate s a hazardous situation which if not avoided could result in minor or moderate injury NOTICE Not related to personal injury Indicates s situations which if not avoided could result in damage to equipment U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 e www hussmann com P N 0506146_D INSTALLATION NSF CERTIFICATION These merchandisers are manufactured to meet ANSI National Sanitation Foundation NSF Standard 7 requirements Proper installation is required to maintain certification Near the serial plate each case carries a label identifying the type of application for which the case was certified ANSI NSF 7 Type I Display Refrigerator Freezer Intended for 75 F 55 RH Ambient Application ANSI NSF 7 Type II Display Refrigerator Freezer Intended for 80 F 55 RH Ambient Application ANSI NSF 7 Display Refrigerator Intended for Bulk Produce HUSSMANN PRODUCT CONTROL The serial number and shipping date of all equipment is recorded in Hussmann s files for warranty and replacement part purposes All correspondence pertaining to warranty or parts ordering must include the serial number of each piece of equipment involve
33. aces with soap and hot water DO NOT USE STEAM OR HIGH WATER PRESSURE HOSES TO WASH THE INTERIOR THESE DESTROY MERCHANDISER S SEALING CAUSING LEAKS AND POOR PERFORMANCE Take care to minimize direct contact between fan motors and cleaning or rinse water Rinse with hot water but do NOT flood Allow merchandiser to dry before resuming operation Wipe down lighted shelves with a damp sponge or cloth so that water does not enter the light channel Do NOT USE A HOSE OR SUBMERGE SHELVES IN WATER After cleaning is completed restore power and turn on the merchandiser LTH Manual 42 Maintenance NOTICE Product will be degraded and may spoil if allowed to sit in a non refrigerated area Cleaning Shelves Shelves and shelf clips are easily removed for cleaning the interior as well as the shelves themselves Cleaning Condenser Coils To maintain peak operating efficiency the coil should be cleaned at least once each month A dirty coil slows product cooling significantly and increases energy consumption by as much as 20 Dirt buildup on coils can also cause the compressor to lock up damaging the con denser unit Remove screws on top of each side of the louvered from grille then lift off the grille Remove Screws at Top of Grille LTH 18 shown Detach Safe NET I electrical wire harnesses The harnesses are located behind the Safe NET I controller The power relay harness on the left has an eight s
34. arge Air High Alarm dSHi This alarm is generated when the average dis charge air temperature in the case over the programmed alarm delay time is higher than the High Alarm value stored in the control This alarm will clear if the average discharge air temperature goes below the High alarm value THIS ALARM IS AVAILABLE ONLY IF DIS CHARGE SENSORS ARE INSTALLED Discharge Air Low Alarm dSLo This alarm is generated when the average dis charge air temperature in the case over the programmed alarm delay time is lower than the Low Alarm value stored in the control This alarm will reset if the average discharge air temperature goes higher than Low alarm value THIS ALARM IS AVAILABLE ONLY IF DISCHARGE SENSORS ARE INSTALLED U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 e WWW HUSSMANN COM P N 0506146_D 3 5 Compressor Starts Time to Subsequent Defrost 8 Hrs or Demand Defrost Time to Subsequent Defrost 8 hrs or Demand Defrost 2 Min Drip time 10 Second Delay 22 Until Compressor Maximum Ce 2 Maximum Starts Defrost Time or Defrost Time Compressor 0n 45 Minutes 45 Minutes Defrost Cycle Will Fail Safe Fail Safe Defrost Cycle Terminates Once the Termination Temperature is Reached 48 F Terminate Once the D Termination Temperature is Reached if Case is Cold Turned Off and Back On Defrost Initiates at Start Up
35. d This is to ensure the customer is provided with the correct parts LOCATION These merchandisers are designed for displaying products in air conditioned stores where temperature is maintained at or below the ANSI NSF 7 specified level and relative humidity is maintained at or below 559 Recommended operating ambient temperature is between 65 F 18 C with a maximum 55 relative humidity to 80 F 26 C with a maximum 55 relative humidity HUSSMANN CORPORATION e BRIDGETON 63044 2483 U S A Placing refrigerated merchandisers in direct sunlight near hot tables or near other heat sources could impair their efficiency Like other merchandisers these self contained units are sensitive to air disturbances Air currents passing around merchandisers will seriously impair their operation Do NOT allow air conditioning electric fans open doors or windows etc to create air currents around the case LTH units in take air and exhaust air through the front of the case and require no clearance space on top at the back or either side Product should always be maintained at proper temperature This means that from the time the product is received through storage preparation and display the temperature of the product must be controlled to maximize the life of the product SHIPPING DAMAGE All equipment should be thoroughly examined for shipping damage before and during unloading This equipment has been carefully inspec
36. d Cassette P N 0506146_D TIPS AND TROUBLESHOOTING There are a few simple things to check before calling for service 1 Product not cold Refrigeration unit requires 24 hours at initial startup to cool down to operating temperature with NO PRODUCT LOADED in merchandiser Ask when merchandiser was stocked and what the usage has been It may take 30 minutes or more for product to chill following stocking 2 Check the door and door seal for air leaks 3 Power Supply Is the unit plugged in Is there power to the unit 4 Location What are the ambient conditions temperature and humidity direct sun nearby source of heat such as oven or grill Is the unit level Has the unit been moved recently 5 Shelves and Stocking Are the standard shelves in the correct places Is the product stocked properly Is the bottom shelf at the proper location 6 Confirm that the defrost schedule 15 properly set using Safe NET I Check for Safe NET error messages IMPORTANT For prompt service when contacting the factory be sure to have the case model and serial number from the case serial plate gt U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 e WWW HUSSMANN COM P N 0506146_D 5 1 SERVICE A WARNING LOCK OUT TAG OUT To avoid serious injury or death from electrical shock always disconnect the electrical power at the main disconnect when servicing or
37. er as well as proper door alignment and operation Choose a level area to install case LTH 8S and LTH 18 cases have one adjustable cabinet foot at each bottom corner for easy adjustment if required LTH45 and LTH68 also have an adjustable foot at center front and back Turn the foot levelers clockwise to add length to each foot for leveling When optional 6 inch legs are used screw the legs tight to the merchandiser base and then adjust the feet When optional casters are used screw them tight to the merchandiser base Once in final position lock each caster P N 0506146_D U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 WWW HUSSMANN COM P N 0506146_D 1 5 DOOR SEAL SERIAL PLATE LOCATION Check that hinge doors close automatically by The serial plate 1s located at the interior left opening the door 45 degrees and releasing side of the merchandiser s cabinet It contains Ensure door closes and gasket seals door shut all pertinent information such as model serial To adjust the torque applied to the hinged number amperage rating refrigerant type and door charge 1 Place a wrench on each of the two lower support nuts located at the bottom hinge DOOR LOCK 2 Loosen the lower nut while holding the A door lock is standard on all doors The key upper nut in place 15 tie wrapped to the door handle at shipment 3 Torque is increased or decreased by rotating the top nut After adjustments are made tight en the
38. essor will start 10 seconds after the power is applied The compressor will run for 10 minutes Then defrost will be initiated During defrost the display will show the temperature before defrost and it will continue to show this temperature for 1 hour Compressor will turn back on once coil is defrosted The compressor will continue to run until it reaches its cut out temperature pull down The refrigeration cycle will continue until the next scheduled 8 hours or demand defrost will repeat until power is interrupted NOTE If power is interrupted sequence will start at CD Defrost will be initiated and the time to subsequent HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A LTH Manual 3 12 START UP OPERATION CONTROLS and ADJUSTMENTS Refrigeration Defrost Controls Controls Model Product Discharge Air Defrost Type of Termination Failsafe Application Temperature Frequency Defrost Temperature Time per day Minutes LTH Frozen Food 20 F to 10 F 3 Electric 48 F 50 All Your Case Configuration Factory Setting Average product temperature 10 F Knob position 5 Adjustment knob has OFF position Delay before compressor runs after startup Delay Time 10 sec Compressor operation if case sensor fails Compressor On What the display shows during defrost The case defrosts when the power is Yes turned on The method used to end defrost Evaporat
39. handisers are factory set with three defrost cycles eight hours apart The first is set to 0600 the second to 1400 and the third is set to 2200 If these preset defrost times are acceptable to your business no settings need to be changed Replace the Safe NET I cover and grille If the preset times need to be changed for your business schedule or if additional defrosts are needed because the merchandiser is in an envi ronment out of the normal temperature range the Safe NET I controller can be set to meet the requirements of your business LTH merchandisers have a door heater that is controlled by Safe NET I If condensation forms on the exterior of the door or door frame check that store ambient temperature is less than 80 F 27 C and relative humidity is less than 55 If condensation persists call tech support HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A 3 3 SET DEFROST TIME Safe NET I Only Press SELECT to enter the Easy Access Menu Use Up or Down buttons to scroll through menu until Star is displayed SEI The Display will cycle between Star and the currently programmed time gt Press the SELECT button when the time 15 displayed The Minutes value will begin to flash Use the Up and Down buttons to change to the desired value Press SELECT to confirm entry The Hours value will begin to flash Use the Up and Down buttons to change to the desired value
40. hes Exterior Interior useable 0 29 LTH45 2 Raoa ag Note Depth dimension D includes 1 1 2 in for door handle Note Overall height includes 1 1 2 in for leveling pods I 29 E gt LTH Electrical Data Electrical Energy Energy Consumption Unit Voltage Fuse Power A C Load Consumption tor optional LEDs H P HZ PH Size Cord Plug kWh day kWh day Ye Cae namn ws msan 2 3 4 208 230 60 1 135 20 6 20P 5103 Estimated energy consumption for optional LEDs HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A LTH Manual A 6 APPENDIX TECHNICAL DATA Electrical Data Note These are rated values for individual components and should not be added together to determine total merchandiser electrical load Evaporator Fans 115V 60Hz Standard for LTH 8S 18 208 230V for LTH 45 68 LTH SS LTH 18 LTH 45 LTH 68 Number of Motors 1 2 4 4 Amperes 0 4 0 8 1 2 1 2 Watts 16 32 120 120 Condensing Unit 115V 1Ph 60Hz Standard for LTH 85 18 208 230V for LTH 45 68 Compressor LRA 56 45 59 8 59 8 Compressor RLA 10 5 10 2 12 12 Product Data LTH SS Interior Volume Cu FtlCase 10 7 3 case 301 57 liters case LTH 18 Interior Volume Cu FtlCase 22 ft case 622 97 liters case LTH 45 Interior Volume Cu FtlCase 41 1 ft case 1163 7 liters case LTH 68 Interior Volume Cu FtlCase 63 97 ft case
41. lot connector The sensor cable harness on the right has a four slot con nector When re installing be sure to plug this harness in the bottom four slot connection not the top connection P N 0506146 D Power Relay Cable Sensor Cable Connected on the top connector Interface Cable Plug Unplug Safe NET Ill Interface Cable Next detach the merchandiser s electrical wire harness located on the right hand side near the coil For Safe NET III detach the interface cable to the display mo p 1 m Unplug Power Harness U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 e WWW HUSSMANN COM P N 0506146_D Remove Screws Holding Cassette Remove the two screws securing refrigeration unit cassette in place Use the center black bar to pull the refrigera tion unit s cassette forward to access the coils USE ONLY THE CENTER BAR TO PULL OUT THE CASSETTE PULLING ON REFRIGERATION LINES OR OTHER PARTS WILL CAUSE DAMAGE TO THE REFRIGERATION UNIT Use Center Bar to Pull Cassette HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A 4 3 Use a soft hand brush attachment on a vacuum to remove accumulated dust and debris Consult an authorized service technician if more extensive cleaning is needed If the refrigeration unit is damaged it can be replaced with a new cassette Optional Reversing Condenser Fan If your merchandiser 15 equipped with the optional reversing
42. m m m m m m m m m m m m m m m m m im m m m m m m m m m m m m m m m m m m Emm m mmm m mm m m mm m ng mmm mm m mm m m m m m m m m m m m m m m m m mm ks N my See T COMPRESSOR NO I CENTER CW 1 4 L RELAY T T ur n bet d a pA UENIT YE m a ONLY WHEN REVERSING 6 COND FAN IS USED REVERSING QUA af STANDARDAND BK COND FAN REVERSING COND H FAN IS USED RIBBED W COMMON REVERSING RELAY SMOOTH BK cw RELAY OVERLOAD w 4 BK ONLY WHEN REVERSING COND FAN IS USED RUN START CAP w R COMPRESSOR w BK INTERIOR LAMP iar BALLAST SWITCH INTERIOR LAMP SAEENETI ONLY SIGN LAMP BALLAST LIMIT w W ANNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNI BK 13 3 t SAFE NET III DOOR PERIMETER HEATER Ao ON Y w BK 2 DIODE MODELS WITH FRAME HEATER N HEATED GLASS SAFE NET ONLY ONLY HEATED GLASS N Model LTH 18 WARNING All components must have mechanical ground and the merchandiser must be grounded CIRCLED NUMBERS Panrs List ITEM NUMBERS Y Yellow G Green BL Blue BK Black W White 120V PowER 120V NEUTRAL l FIELD GROUND mm CASE GROUND P N 0506146_D U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 WWW HUSSMANN COM APPENDIX WIRING DIAGRAMS LTH 45 and LTH 68
43. o not use HOT water on COLD glass surfaces This can cause the glass to shatter and could result in personal injury Allow glass fronts ends and service doors to warm before applying hot water Exterior Surfaces The exterior surfaces must be cleaned with a mild detergent and warm water to protect and maintain their attractive finish NEVER USE ABRASIVE CLEANERS OR SCOURING PADS NEVER USE CAUSTIC SODA KEROSENE GASOLINE THINNER SOLVENTS DETERGENTS ACIDS CHEMICALS OR ABRASIVES DO NOT USE AMMONIA BASED CLEANERS ON ACRYLIC PARTS HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A Interior Surfaces DO NOT USE AMMONIA BASED PRODUCTS TO CLEAN LIGHT SHIELDS NEVER USE ABRASIVE CLEANSERS OR SCOURING PADS The interior surfaces may be cleaned with most domestic detergents and sanitizing solutions with no harm to the surface Always read and follow the manufacturer s instructions when using any cleaning product Do NOT Use Abrasive cleansers and scouring pads as these will mar the finish Coarse paper towels on coated glass Ammonia based cleaners on acrylic parts A hose on lighted shelves or submerge the shelves in water Solvent oil or acidic based cleaners on any interior surfaces A hose on rail lights canopy lights or any other electrical connection Do First turn off refrigeration then disconnect electrical power Remove product and loose debris Thoroughly clean all surf
44. or Yellow Air Sensor Black Safe NET III Display F Safe NET III Harness LTH 8S 18 Power Cord 15 Amp 115V LTH 45 Power Cord 15 Amp 208 230V LTH 68 Power Cord 20 Amp 208 230V LED 85 18 Power Cord 15 Amp 115V LED LTH 45 Power Cord 15 Amp 208 230V LED LTH 68 Power Cord 20 Amp 208 230 Cassette Refrigeration System Compressor HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A Item Part CO 4671240 MO 4410904 FB 4780826 EV 4671239 VR 4613907 FL 4613236 GA 4330333 GA 4330331 LTH 18 EQ 4671412 CU 4200694 EQ 4611300 MO 4410685 FB 4780650 EV 4671199 VR 4613234 FL 4613236 GA 4981174 GA 4330317 A 1 Description Condenser Condenser Fan Motor Condensers Fan Blade Evaporator TXV Filter drier Cassette Magnetic Seal Cabinet Air Pressurized Seal Cassette Refrigeration System Compressor Condenser Condenser Fan Motor Condenser Fan Blade Evaporator TXV Filter Drier Cassette Magnetic Seal Cabinet Air Pressurized Magnetic Seal LTH Manual A 2 Item Part LTH 45 EQ 4613377 EQ 4613378 CU 4200719 EQ 4611299 EQ 4611300 MO 4410906 FB 4780650 EV 4671294 EV 4671294 VR 4613846 FL 4613236 GA 4330345 GA 4996370 TM 4914521 P N 0506146_D APPENDIX TECHNICAL DATA Description Cassette Refrigeration System Right Side Cassette Refrigeration System Left Side Compressor Condenser Right Side Condenser Left Side Condense
45. or Sensor Temperature Defrost terminated by termination switch P N 0506146 D 1 The Safe NET III Controller controls refrig eration temperature This is factory installed in the control panel Adjust this control knob to maintain the discharge air temperature shown Measure discharge air temperatures at the center of the discharge air opening Defrosts are time initiated and temperature terminated for self contained The defrost set ting is factory set as shown above To ensure a thorough defrost defrost must be terminated by the temperature termination setting not by time U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 e WWW HUSSMANN COM P N 0506146_D THERMOSTATIC EXPANSION VALVE TEV Each self contained merchandiser has its own evaporator coil and a pre set thermostatic expansion valve TEV The TEV has been factory set at design conditions to provide the recommended performance Remove the fan panel to expose the thermostatic expansion valve TEV ADJUSTMENT Expansion valves may be adjusted to fully feed Probe Locations the evaporator Before attempting to adjust valves make sure the evaporator is clear or only lightly covered with frost and the merchandiser is within 10 F of its expected operating temperature Adjust the valve as Follows a Attach a probe to the suction line near the expansion valve bulb b Obtain a pressure reading from the factory installed Schraeder
46. parameter SETTING SAFE NET I TIME Set the Clock using the Easy Access Menu Press SELECT to enter the Easy Access Menu Use Up or Down buttons to scroll through menu until CLOC is displayed The Display will cycle between CLOC and the currently programmed time gt CLOC HH MM P N 0506146 D Press the SELECT button when the time is HIER The Minutes value will begin to flash Usethe Up and Down buttons to change to the desired value Press SELECT to confirm minutes entry Hle Hf The Hours value begins to flash Use the Up and Down buttons to change to the desired value Press SELECT to confirm minutes entry The clock is now set ESCAPE MENU To leave a Menu and return to the default display press the UP and DOWN buttons on the Safe NET I display module simultaneously Safe NET I DEFROSTS These refrigeration units must go into defrost mode at least twice each day to maintain optimal performance During defrost the tem perature display may rise 2 3 F 1 2 C Avoid opening the door during the defrost cycle During defrost the digital display will show dEFr or dF Defrost is done automatically with Safe NET I Defrost water drains to a drip pan where it evaporates In the event of power loss the clock will retain the time before the loss U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 e WWW HUSSMANN COM P N 0506146_D LTH merc
47. ping Skid ioa eT rcr eo usa 1 3 Sequence of Operation Safe NET 3 11 Model Description 1 4 Controls and Adjustments 3 12 Cabinet Leveling 1 4 Thermostatic Expansion Valve TEV 3 13 Doot Ree 1 5 NOTES 43 6 oe a Oe RUE 3 14 Serial Plate Location 1 5 Door Lock vus ded e pw es 1 5 Shelf Installation 1 6 MAINTENANCE CECR 1 6 Door SWIteh u usa l a smash asas 1 6 Care and Cleaning 4 1 StOCKIN degen nay cA 1 7 Exterior Surfaces 4 1 Condensing Unit Air Flow 1 7 Interior Surfaces 4 1 Load Eimits a pula bte eara 1 7 Cleaning Shelves 4 2 Bhistrati tis e Ser shed tau 1 8 Cleaning Condenser Coils 4 2 Optional Reversing Condenser Fan 4 3 Cleaning Wash Out Drain 4 4 ELECTRICAL REFRIGERATION Tips and Trouble Shooting 4 4 CX EH EE 2 1 es ie hop cx ORO 2 2 SERVICE Defrost Cycle 25 eh toe 2 2 NOTES I aa oii te heat 2 4 Replacing Fluorescent Lamps 5 1 Replacing Display Lamp 5 1 Replacing Interior Lamps 5 2 START UP OPERATION Replacing Electronic Ballasts 5 2 OPERATING SAFE NET CONTROLS Temperature Control 3 1 Setting Safe NET I Time
48. r Fan Motor Condenser Fan Blade Evaporator Right Side Evaporator Left Side TXV Filter Drier Cassette Magnetic Seal Cabinet Air Pressurized Magnetic Seal Pencil Thermometer Item Part LTH 68 EQ 4671414 EQ 4671433 CU 4200820 EQ 4611299 EQ 4611300 MO 4410906 FB 4780650 EV 4671483 EV 4671483 VR 4613234 FL 4613837 GA 4996369 GA 4996370 TM 4914521 Description Cassette Refrigeration System Right Side Cassette Refrigeration System Left Side Compressor Condenser Right Side Condenser Left Side Condenser Fan Motor Condenser Fan Blade Evaporator Right Side Evaporator Left Side TXV Filter Drier Cassette Magnetic Seal Cabinet Air Pressurized Magnetic Seal Pencil Thermometer U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 e WWW HUSSMANN COM APPENDIX TECHNICAL DATA Item Part BA 4482539 BA 4482613 BA 4482539 BA 4482613 SW 4440540 SW 4440823 TP 4990664 TP 4916916 TP 4918760 Description LAMPS AND BALLASTS Ballast LTH 8S LTH 18 Ballast LTH 45 Ballast 1 LTH 68 Ballast 2 LTH 68 Fan Switch LTH All Models Light Switch LTH All Models Fascia Back Light Cover LTH 18 Fascia Back Light Cover LTH 45 Fascia Back Light Cover LTH 68 HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A Item Part Doons DO 4979896 DO 4996371 DO 4996372 DO 4991826 DO 4991827 DO 4991827 GA 4330332 GA 4330316 GA
49. s schedule when you are not at the busiest serving times The Safe NET control is located in the front grille below the door All LTH merchandiser models are preset to with three defrosts per day In most situations this will be enough defrosts unless the unit is operated in non air conditioned environments or high humidity locations The temperature of the air entering the evaporator depends on surrounding ambient temperature and the amount of time the merchandiser has been running OPERATING Safe NET I CONTROLS When power is first applied the Safe NET I display will show the version of software installed the text Safe NET 9 04 or higher should scroll across the display HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A If the display looks like this you have a Safe NET control IN Safe NET Control If the display looks like this you have a Safe NET control Safe NET III Control LTH Manual 3 2 START UP OPERATION To access and adjust Safe NET I Plug in the LTH merchandiser Open the Safe NET I controller using a small flat blade screwdriver to pop off the oval cover this may be tight You will see three buttons on the control board as shown in this photo DOWN Button SELECT UP Button Button The SELECT button is used to view EASY menu and to edit confirm values Use the UP or DOWN buttons to move to the next item in the menu or change the value of a
50. tach walls from each other Lift crate from the skid Unscrew the case from the skid The merchandiser can now be lifted off the crate skid Lift only at base of skid Remove any braces and or skids attached blanket wrapped merchandiser may have skids DO NOT TILT MERCHANDISER ON ITS SIDE OR END WHEN REMOVING SKID Once the skid is removed the merchandiser must be lifted NOT PUSHED to reposition To remove the skid remove screws attaching skid to the merchandiser Check floor where merchandisers are to be set to if it is a level area Determine the highest part of the floor N WARNING Do NOT remove shipping crate until the merchandiser is positioned for installation LTH Manual 1 4 Installation MODEL DESCRIPTION LTH merchandisers are low temperature self contained cabinets designed for pre packaged frozen food or products that require frozen temperatures for conservation Design features include Self closing glass doors La Electronic controls free foam insulation Pe Lighted Sign except LTH 8S Door lock nm WR Cassette refrigeration system Available options are Reversing condenser fan motor Buzzer alarm CABINET LEVELING Si This merchandiser must be installed level from back to front and side to side to allow maxi 2 mum draining of the condensate wat
51. ted at our factory Any claim for loss or damage must be made to the carrier The car rier will provide any necessary inspection reports and or claim forms Apparent Loss or Damage If there Is an obvious loss or damage it must be noted on the freight bill or express receipt and signed by the carrier s agent otherwise carrier may refuse claim Concealed Loss or Damage When loss or damage is not apparent until after equipment is uncrated retain all packing materials and submit a written response to the carrier for inspection within 15 days LTH Manual 1 2 Installation SELF CONTAINED LOCATION Product should always be maintained at proper temperature This means that from the time the product is received through storage preparation and display the temperature of the product must be controlled to maximize the life of the product BE SURE TO POSITION SELF CONTAINED MERCHANDISERS PROPERLY SELF CONTAINED models have vented base panels to allow air circulation through the condensing unit Allow for a minimum 36 in clearance in the front Blocking or restricting air flow will adversely affect performance and may damage the refrigeration system n LTH 45 Kees Air Sn Intake Sq SS SSK Exhaust SV Plan View Rear Zero Clearance f at Sides and Rear 36 in Clearance at Front P N 0506146_D LTH 8 18 Air Exhaust Plan View Zero Clearance 7 at Sides and Rear NN Q SSS X 36
52. tep 3 15 completed The display will show dF once Step 3 is com pleted even with the protective delay timing out The dF will display for awhile after defrost has terminated to allow the temperature to stabilize LTH Manual 3 10 START UP OPERATION Typical Sensor to Control Configuration Black Air Yellow Sheath Evaporator Sensor Defrost Termination Black Z Black Sheath Evap gt J Air Sensor Display 2 A White a Common for Both Sensors Yellow Sensor Defrost Termination Evaporator Black Sensor Control Air Control Sensor Black Sheath Evaporator Sensor Defrost Term inserted into the Evaporator Fins or into the Suction Line Yellow Sheath Black Air Sensor 8 Black Evaporator Sensor 9 11 Not Used Common BS Both Sensors 4 Detail A WARNING LOCK OUT TAG OUT To avoid serious injury or death from electrical shock always disconnect the electrical power at the main disconnect when servicing or replacing any electrical component This includes but is not limited to such items as doors lights fans heaters and thermostats P N 0506146 D U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 WWW HUSSMANN COM P N 0506146_D 3 11 Compressor Starts Time to Subsequent Defrost 8 hrs or Demand Defrost Time to Subsequent Defrost 2 Min Drip Tine 8 Hrs or Demand Defrost
53. tructions on page 3 1 For merchandisers with Safe NET III the defrost cycle is initiated at start up and every 8 hours thereafter If the power is interrupted the defrost resets to this time The defrost can be reset to a desired time by unplugging and restarting the merchandiser at the preferred time U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 e WWW HUSSMANN COM P N 0506146_D After the defrost cycle evaporator fans are delayed from starting to prevent water from being blown out of the evaporator pan Fans are also delayed during initial startup for approximately 10 minutes Note To reduce accumulation of frost on the evaporator coll the fans will cycle off with each door opening and back on as the door closes The evaporator fans also cycle ON and OFF during the defrost The fans cycles for 10 seconds every two minutes The fan cycles increase defrost efficiency HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A 2 3 LTH Manual 2 4 Electrical Refrigeration NOTES P N 0506146_D U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 WWW HUSSMANN COM P N 0506146_D START UP OPERATION TEMPERATURE CONTROL Safe NET is the electronic controller that regulates the merchandiser s cooling system Before Safe NET I can operate correctly the internal clock must be set This will allow it to regulate the system for defrost at convenient times of the day around your location
54. valve Convert the pressure reading to a saturated temperature for the refrig erant Temperature b minus Temperature a is the superheat The valve should be adjusted so that the greatest difference between the two tempera tures is 3 F to 5 F Make adjustments of no more than 1 2 turn of the valve stem at a time and wait for at least 15 minutes before rechecking the probe tempera ture and making further adjustments HUSSMANN CORPORATION BRIDGETON MO 63044 2483 U S A e WWW HUSSMANN COM 3 13 LTH Manual 3 14 START UP OPERATION NOTES P N 0506146 D U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 WWW HUSSMANN COM P N 0506146_D MAINTENANCE N WARNING To reduce the risk of fire electrical shock or injury when cleaning this merchandiser Unplug the merchandiser before cleaning Keep all liquids away from electrical and electronic components Do not use any mechanical device or other means to speed the defrost process except as recommended by the manufacturer CARE AND CLEANING Long life and satisfactory performance of any equipment is dependent upon the care it receives To ensure long life proper sanitation and minimum maintenance costs this unit should be thoroughly cleaned all debris removed and the interiors washed down Cleaning often will control or eliminate odor buildup Frequency of cleaning is dependent on usage and local health requirements N WARNING D
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