Installation & Service Manual
Contents
1. Sa ee Sape CASE WALE SS eo z eco OPTIONAL HOT GAS a 2 DEFROST TERMINATION WHEN THERE IS MORE OPENS 0076 CLOSES 40 F THAN ONE CASE IN LINE UP THERMO STATS SHOULD CON NECTED IN PARALLEL TO EFROST CONTROL AT THE COMPRESSOR RACK J anuary 2000 THERMOSTAT 15 MOUNTED ON THE PIPE BETWEEN THE OISTRUBITOR AND THE CHECK VALVE THE EVAPORATOR COIL TO RACK CONTROL CIRCUITS 120v 60HZ SUPPLY OR 220VAC 50 2 INTERNAT IONAL NOTE ALL CASES MUST BE GROUNDED LeFA6 amp BFT CASES HOT GAS DEFROST Page 11 TOP RACE WAY T 8 LIGHTS u L ae ED eaccast E BER YEL OPT IONAL HO LIGHTS i Q EE Ce DUAL ROW 1 YEL CANOPY LIGHTS FANS AMBIENT AIR BAND OPTIONAL CASE 2 FANS PER 12 CASES TEMP THERMSTAT REMOTE BULB 15 LOCATEO IN TOP amp T SHELF DISCHARGE AIR STREAM FANS SECONDARY BLK WIRE CONNECTOR TO PROVIOE POWER TO NOSE LIGHTS 17 98 9027301 IB CONNECT BRN WIRE QUICK CONNECT TO TAB ON AIR BAND 3 FANS PER 12 CASES DISCHARGE GRID ANTI SWEAT HEATER aM T HELF DUCT ANTI AT HEAT OP SHE SWE EATERS FAN DELAY THERMOSTAT OPEN 60F CLOSE SOF FANS PRIMARY AIR BANO 3 FANS PER 12 CASES T 8 LIGHTS OPTIONAL HO LIGHTS ae LLIGSEWAL ______ g OPTIONAL HOT GAS ALL CASES MUST BE GROUNDED WHEN THERE S MORE Q THERMO2. TYLER S ant Installation amp Servic Manual L6FA MULTI SHELF FROZEN FOOD MERCHANDISER Low Temperature Self Serve Display Cases This manual has been designed to be used in conjunction with the General Installation amp Service Manual Save the Instructions in Both Manuals for Future Reference This merchandiser conforms to the Commercial Refrigeration Manufacturers Association Health and Sanitation standard CRS S 1 96 PRINTED IN Specifications subjectto REPLACES ISSUE PART IN U S A change without notice EDITION 7 99 1 00 No 9027522 REV D Tyler Refrigeration Corporation Niles Michigan 49120 Installation amp Service Manual L6FA CONTENTS Page Specifications L6FA Specification Sheets 4 Pre installation Responsibilities See General I amp S Manual Installation Procedures Carpentry Procedures 6 Case Pull Up Locations 6 Electrical Procedures 6 Plumbing Procedures See General I amp S Manual Refrigeration Procedures See General I amp S Manual Defrost 7 DBetrost Control Charn eme nom Rc ed etm Rx Ras 7 Installation Procedure Check Lists See General I amp S Manual Wiring Diagrams 7 L6FA
3. 3 2 Clean outer honeycomb 3 away from the case with high pressure air or water 3 Replace the outer honeycomb 3 and secure the light channel 2 July 1999 L6FA J 4 7 5 6 Anti Sweat Heater Replacement WARNING Always shut off electricity to the entire case before replacing an anti sweat heater Electrical power to wire ends could cause personal injury and or death NOTE Anti sweat heater wires will be still be attached Tag and cut wires to remove front molding 1 Remove the screws 4 and front molding 5 and inner honeycomb 6 from the interior top of the case 2 Tag and cut defective anti sweat wire 7 and remove aluminum tape and wire from front molding 5 Discard aluminum tape 3 Install new anti sweat wire 7 in grooves in front molding 5 and cover with new aluminum tape Page 15 Tyler Refrigeration 4 Splice the anti sweat heater wire 7 to Ambient Air Filter Replacement wire leads from the case Ambient air filters are located on top front of CAUTION the case above each ambient fan Replace all Make sure wire leads do not get pinched ambient air filters at intial start up Routinely by the front molding during installation inspect and replace all ambient air filters Pinched wires could short out the anti 1 To remove and inspect the air filter slide sweat heater wire 5 Install inner honeycomb 6 and front molding 5 and secure w
4. FOR 12 CASES El ii m r IONAL HO LIGHTS 1 SINGLE OR DOUBLE ROW NC L O i b m w a e od 2 lt FANS AMBIENT e AIR BANO O 2 BAND 3 FANS PER 12 CASE NNECT BRN WIRE QUICK CONNECT O TAB ON BLK WIRE CONNECTOR O PROVIDE POWER TO NOSE LIGHT CO ANTICSHEAT HEATER NWN T ANTI SWEAT HEATER TOP SHELF DUCT ANTI SWEAT HEATERS PRIMARY J J AIR BAND LF 3 FANS PER 12 CASE NOSE LIGHTS iii DEFROST HEATERS HUMAN iii 5 ea 120VAC 60 2 SUPPLY 220VAG 50HZ NOTE ALL CASES MUST BE GROUNDED INTERNATIONAL Page 10 J uly 1999 NOTE BALLAST ARE MOUNTED IN RACE WAY T 8 LIGHTS OPTIONAL HO LIGHTS SINGLE OR DOUBLE ROW CANOPY LIGHTS FANS AMBIENT AIR BANO 2 FANS PER 8 CASES 1 FAN PER 6 CASES OPTIONAL CASE TEMP 5 REMOTE BULB IS LOCATED IN TOP SHELF OISCHARGE AIR STREAM FANS SECONDARY AIR BAND 2 FANS PER 6 amp 8 CASES DISCHARGE GRID ANTI SWEAT HEATER M oan TOP SHELF DUCT ANTI SWEAT HEATERS TO PROVIDE POWER TO NOSE LIGHTS ic i7uurgatcK 9027300 CONNECT BRN WIRE QUICK CONNECT TO TAB ON BLK WIRE CONNECTOR FAN DELAY THERMOSTAT OPEN 60F CLOSE 30F FANS PRIMARY AIR BAND 2 FANS PER 6 amp 8 CASES NOSE LIGHTS gt v Nv p T 8 LIGHTS ee ee ee
5. 2317 BTUH FT WHEN USED AS STAND ALONE CASE NOTE COMPRESSOR SIZING SHOULD ALLOW FOR SUCTION LINE PRESSURE DROP THE ABOVE RATINGS ARE FOR COMPRESSOR SELECTION ONLY FOR ENERGY CALCULATION DATA REFER TO THE ENERGY SECTION FOR COMPRESSOR SIZING INFORMATION REFER TO THE GOLD SECTION amp FOR LINE SIZING INFORMATION REFER TO THE BUFF SECTION OF THE TYLER SPECIFICATION GUIDE VOLT DEFROST cr 112 150 23 0 NC 5 Em NEM 15 23 NON 3 30 DF 3 30 DF 3 30 DF 3 30 DF 3 30 DF 3 30 DF 3 30 DF 3 30 DF 3 30 30 30 30 30 30 30 30 30 30 CASE TO CASE SUCTION LINE SUB FEED BRANCH LINE SIZING ER ELECT 40 MIN 158 R404A 5 R404A Horcas ey renon Sra au Electronic Sensor is used for termination it should be set at 70 termination temperature Used with Thermostat or EPR Control Set EPR to give this pressure at the case CASE CIRCUITS In addition to the 208V Defrost Circuit there is the 120 Case Fan Circuit plus the 120V Case Anti Sweat Heater Circuit Shelf or Canopy lights require a separate 120V circuit which can be switched at the back room for convenience in controlling the lights ELECTRICAL DEFROST Requires a 3 Phase 208V supply for the defrost heaters controlled by the defrost clock and breaker s at the machine panel a 3 pole contactor and defrost limit switch in each case Setting of t
6. 9028437 9028438 Opt 800MA Ballast can 2 row 5049140 5204769 5049140 5204859 5204859 T 8 Lampholder 5232279 5232279 5232279 5232279 5232279 800MA Lampholder telescoping 5614628 5614628 5614628 5614628 5614628 stationary 5614629 5614629 5614629 5614629 5614629 Light S witch 5100565 5100565 5100565 5100565 5100565 Electric Defrost Heater 3 case 5216523 5199301 5199302 5199301 5199302 Special Contactor for Defrost 5109383 amp 5109383 amp 5109383 amp 5109383 amp 5109383 amp w Aux Pilot Circuit 3 Pole 40A 5638229 5638222 5638229 5638229 5638229 Electric Def Termination T stat 5058480 5058480 5058480 5058480 5058480 Anti S weat Heater Wire between sec prim air bands 5216522 5088067 5088068 5088691 5088692 in primary air band 5216522 5124216 5124217 5124216 5124217 For information on operational parts not listed above contact the TYLER Service Parts Department J uly 1999 Page 19
7. Domestic amp Export 50Hz Case Circuits with Electric Defrost 8 L6FA Domestic amp Export 50Hz Case Circuits with Gas Defrost 10 Cleaning and Sanitation See General I amp S Manual General Information Night Curtains and Strip Doors 12 Case Shelving Information 12 Service Instructions Preventive Maintenance See General I amp S Manual Ballast and Lighting Locations 13 Fan Locations 13 Checking Air Velocities 13 Cleaning 14 Anti Sweat Heater Replacement 14 Defrost Heater Replacement 15 Ambient Air Filter Replacement 15 Parts Information Cladding and Optional Trim Parts List 16 Operational Parts 6 18 TYLER Warranty See General I amp S Manual The following Low Temperature Multi Shelf Frozen Food Merchandiser models are covered in this manual MODEL DESCRIPTION L6FA 6 8 amp 12 MULTI SHELF FROZEN FOOD MERCHANDISER July 1999 Page 3 L6FA Tyler Refrigeration SPECIFICATIONS L6FA Multi Shelf Frozen Food Merchandiser Specification Sheets MODEL L6FA L6FA ve 1 _ NOTE L6F6A FROZEN FOOD CASE HAS
8. The refrigeration should be set to remain off for the complete failsafe time plus a 5 minute drain off or clear time period This type of defrost operation allows the problem areas in the case to completely clear without subjecting the refrigerated product to excessive warm up A defrost termination klixon type open on rise thermostat is mounted on the left hand side next to the rear coil check valve that bypasses defrost refrigerant flow around the expansion valve The defrost termination device along with the mechanical or electron ic defrost control should be set up to cycle or pulse the hot gas valve during the defrost time period If you use a mechanical clock you should wire it in parallel with the hot gas valve If the return liquid temperature rises to 70 the hot gas valve should be closed until the return liquid temperature cools to 40 F and then the hot gas valve will reopen and provide additional heat This cycling will con tinue until the total defrost time has elapsed Note that the klixon type thermostat has a time lag associated with it s operation so its actual setting is 60 F but if an electronic sensor is used for termination it should be set at 70 F termination temperature Page 7 L6FA because it is faster reacting Also if used with an electronic controller cycle the hot gas valve when the lowest sensor temperature minimum has reached 70 F In addition the primary air band fans on the L6
9. defrost type that uses a klixon NOTE The termination thermostat 55 35 Settings for electric defrost is located in the right hand end of the upper electrical raceway The termination thermostat for gas defrost is located next to the rear coil bypass check valve CAUTION If electronic sensors are used in place of the klixons the sensors must be located in the same location as the klixons for that defrost type Any other locations will effect the refrigeration efficiency of the case L6FA Optional Hot Gas Defrost Operation Requirements When reverse cycle gas defrosting option is used it should only be applied to multiple compressor systems Parallel racks A maxi mum of not more than 2596 of the load on a J anuary 2000 L6FA given rack should defrost at one time because the defrosting cases become a con denser during the defrost period and the other refrigerated cases must provide enough heat load to keep a compressor operating Do not defrost more than 24 feet of the L6FA at one time to limit the amount of refrigerant used in that circuit during the defrost Insulated partitions must be used between cases in the same lineup that have differ ent defrost times Defrosts are initiated by a multi circuit defrost clock or an electronic defrost controller At the beginning of gas defrost the refrigeration is stopped and the gas is diverted in a reverse direction through the suction line to the display case
10. e j 79 1 8 S 25 24 7 12 28 8 Vela 25 V y 5 e 4 44 ALLOW 3 SPACE between the back of the case and store walls other cases or other coolers to minimize possible condensation problems d 1 for FORCED VENTILATION could be necessary in some situations nsulated Partition 8 or 12 dum deus ON die MM Oa Sha ee for Standard Rear of Case Patch End 6 34 1 4 Refrigeration 1 Galvanized pipe 1 1 8 Suction Waste Outlet 22 i 4 Electric 3 8 Liquid or 1 O A 1 2 Liquid for Hot Gas Front of Case 22 RorL 4 or DO NOT RUN LIQUID LINE INSIDE OF CASE ONE FLOOR DRAIN CAN SERVE 2 CASES 208 Volt circuit is required at the top of this case for the defrost contactor J uly 1999 Page 5 L6FA INSTALLATION PROCEDURES Carpentry Procedures Case Pull Up Locations All L6FA models have four pull ups at each end ofthe case Pull ups A B C and D are located as shown and should be installed and tight ened starting with A and finishing with D See General I amp S Manual for line up assembly instructions Page 6 Tyler Refrigeration Electrical Procedures Electrical Considerations CAUTION Make sure all electrical connections at components and terminal blocks are tight This will prevent burn
11. FA are cycled off during the defrost cycle with a limit klixon type thermostat that is mounted to a coil return bend on the right hand end of the case It will cycle the primary fans off at 60 F and on at 30 F This helps minimize the product temperature warmup during the defrost All other fans both sec ondary and ambient airband continue to run during defrost Electric Defrost Limit Switch DEFROST LIMIT SWITCH L9 9 9 9 97 The Defrost Limit S witch is located in the top raceway with its sensing bulb in the primary air band The limit switch is factory preset for 52 F If defrost is too long the thermostat is set too high Page 8 Tyler Refrigeration Adjusting the Defrost Limit S witch Remove the fiberboard 1 from the end of the control 2 Turn the brass adjustment screw 3 clockwise to raise or counterclock wise to lower the termination temperature One turn changes temperature setting approximately 5 F WIRING DIAGRAMS ELECTRICIAN NOTE OVERCURRENT PROTECTION 120V circuits should be protected by 15 or 20 Amp devices per the requirements noted on the cabinet nameplate or the National Electrical Code Canadian Electrical Code Part 1 Section 28 208V defrost circuits employ No 10 AWG field wire leads for field connections On remote cases intended for end to end line ups bonding for ground may rely upon the pull up bolts The following wiring diagrams on pages 9 thru 12 will cov
12. Limitations Low temperature multi shelf cases are partic ularly sensitive to air pattern changes These changes occur if shelves are not installed or used properly Four full rows of shelving must be used in this case The bottom row of shelving must be no more than 24 above the bottom tray Shelving can consist of four rows of 22 wide shelves or three rows of 22 wide shelves and one bottom row of 18 wide shelves Do not use any other shelving combinations J uly 1999 L6FA Shelf Loading Observe all the LOAD LINE stickers when stocking the shelves with product Do not let the product spill over or go beyond these lines Do notlet the product cover up or block any of the air ducts CAUTION Use of large signage can interfere with the proper air movement in the case Improper air movement will alter the case temperature and could cause product loss Page 13 L6FA SERVICE INSTRUCTIONS See General I amp S Manual for T 8 and 800MA T 12 lamp canopy ballast fan blade and motor and color band and bumper replacement instructions Ballast and Lighting Locations The canopy light ballasts are located under the canopy on the top of the canopy light channel The nose light ballasts are under the upper front cladding The canopy light s are under the canopy light channel in the top ofthe case The nose light s are behind the bumper retainer hand rail Fan Locations Fan assemblies are located in
13. STAT UNE UP THE THERMO 2 2 120 60HZ THERMOSTAT 15 STATS SHOULD BE CON ON THE PIPE BETWEEN SUPPLY DE CONTROL AT THE THE CHECK VALVE ON 220VAC 50 2 COMPRESSOR RACK THE EVAPORATOR COIL INTERNATIONAL 10 RACK CONTROL CIRCUITS NOTE L6FA12FT CASES HOT GAS DEFROST Page 12 J anuary 2000 Installation amp Service Manual GENERAL INFORMATION Night Curtains and Strip Doors Night curtains and strip doors are available from several souces They promote energy savings by partially closing off the front of the case TYLER does not promote these products but accepts that they are used by some Night curtains are to be pulled down each night They considerably cut the refrigeration load during the night by cycling the compres sor more frequently If gas or electric defrost occurs when the curtains are down a surplus of moisture laden air will be trapped in the refrigerated area and deposit on product For this reason defrosts must be scheduled to occur when the case is open Plastic strip doors are permanently hung over the face of the case The ambient air band is disconnected and plugged during installation The refrigeration load reduction alters the system drastically The compressor and suction line become oversized and the need for defrost time and frequency are reduced Follow the suppliers recommenda tions for best results Case Shelving Information Case Shelving
14. er order 9 Bumper C color per order 10 Color Band Backer Painted 9040223 9040223 9040223 11 Color Band Painted 9023795 9023798 9023800 12 Bumper End Trim p Y color per order 13 Upper Front Cladding Painted 9025643 9025473 9025474 14 Lower Front Cladding Painted 9025644 9025475 9025476 15 Screw 5183536 4 5183536 4 5183536 6 16 Raceway CoverBacker color per order 17 Raceway Cover End Trim color per order 18 Kickplate 1 C l color per order Kickplate Backer 9041790 9041790 9041790 19 Shoulder Screw 9025833 6 9025833 8 9025833 8 20 Kickplate Support Assy 9042341 3 9042341 4 9042341 4 21 Raceway Cover Retainer 9023841 3 9023841 4 9023841 5 Screw 5183536 9 5183536 12 5183536 15 22 Raceway Cover LlLlLlC lCL L L LL LL C gt y color per order 23 Raceway Support 9041326 4 9041326 6 9041326 8 24 Screw 5183536 8 5183536 12 5183536 16 25 LH End Close off Painted 9022463 9022463 9022463 RH End Close off Painted 9022464 9022464 9022464 26 Raceway 9300242 9300243 9300244 27 Screw Shoulder 9025833 12 9025833 18 9025833 24 28 Screws 5205439 4 5205439 5 5205439 6 J uly 1999 Page 17 L6FA Item Description 29 Horizontal End Trim 30 Tray J oint Trim 31 Top Shelf Duct J oint 32 Scr
15. er the L6FA case circuits with electric defrost and gas defrost The canopy lighting circuit is covered in the case circuit diagrams J uly 1999 ON RISE USE COPPER 208VAC CONDUCTORS ONLY DEFROST LIMIT 220VAC 3PH 50HZ SUPPLY THERMOST DEFROST t A CONTACTOR lo O TERMINAL BLOCK 9027247 NOTE BALLAST ARE MOUNTED IN TOP RACE WAY CEE TT ATETA 002 ICK CONNECT OPTIONAL CASE TEMP THERNSTAT REMOTE BULB IS LOCATED IN TOP 23JAN97 ck 97 SHELF DISCHARGE AIR STREAM TO PROVIDE POWER TO NOSE LIGHTS CONNECT BRN WIRE 90 TO BLK WIRE CONNECTOR AIR BAND 2 FANS PER 648 CASE DISCHARGE GRID ANTI SWEAT HEATER TOP SHELF DUCT ANTI SWEAT HEATERS OPTIONAL MO LIGHTS DEFROST HEATERS V muntun E H tuna P NOTE ALL CASES MUST BE GROUNDED PP 220VAC 2 INTERNATIONAL LSFA6 amp 8F T CASES J uly 1999 Page 9 CONDUCTORS ONLY 220VAC 3PH 50HZ DEFROST LIMIT DEFROS SUPPLY i THERMOSTAT OPEN ON RISE CONTACTOR R on uo i lg B CLOSE ON RISE ND ort BLUE AUX CONTACT E 9027248 B 2 FANS PER 12 CASE TEMP THERMSTAT REMOTE BULB 1S LOCATED IN TOP SHELF DISCHARGE AIR STREAM CN T 8 LIGHTS G
16. ew 6 5190028 5187950 5629694 5205439 4 Tyler Refrigeration 8 12 5190028 5190028 5187950 5187950 5629694 5629694 5205439 4 5205439 4 J uly 1999 Installation amp Service Manual L6FA Operational Parts List Case Usage Domestic Export Electrical Circuit 115 Volt 60 Hertz 220 Volt 50 Hertz Case Size 6 8 12 8 12 Fan Motors ambient 5125532 5125532 5125532 5202538 5202538 5 Watt 5 Watt 5 Watt 5 Watt 5 Watt secondary 5125532 5125532 5125532 5202538 5202538 5 Watt 5 Watt 5 Watt 5 Watt 5 Watt primary 5146520 5146520 5146520 5223696 5223696 23 Watt 23 Watt 23 Watt 18 3Watt 18 3 Watt Fan Motor Brackets ambient 5120098 5213132 5120098 5213132 5120098 secondary 5120098 5120098 5120098 5120098 5120098 5205112 5205112 5205112 5205112 5205112 Blades amb 7 75 22 5B 9040680 9040680 amb 6 27 5B 9023762 amb 7 75 20 5 9023760 amb 6 30 5B 9023766 sec 7 75 15 5B 9301932 9301932 9301932 7 75 18 5B 9023761 9023761 prim 8 75 25 5B 5984399 5984399 5984399 prim 8 75 30 5B 9407319 9407319 Fan ambient 5063030 5063030 5063030 5063030 5063030 T 8 Electronic Ballast canopy 5966635 5966635 5991030 9028439 9028438 5991029 5991029 5991030
17. he switch is 52F GAS DEFROST Uses a limit thermostat along with a primary fan klixon which cycles the primary fans OFF above 60F Ambient Air Band This case has a third air band which directs ambient air in front of the Air Screens to provide an extra barrier to warm air infiltration Pressure Control Settings W O Thermostat amp Solenoid 13 Cut In 7 Cut Out With Thermostat amp Solenoid 19 Cut In 0 Cut Out OPTIONAL CASE BTUH REQUIREMENTS are calculated to produce approximately i indicated entering air temperature with absolute maximum operating ambient limits of 75F amp 55R The information contained herein is based on technical data and tests which we believe to be reliable and is intended for use by persons having technical skill at their own discretion and risk Since conditions of use are outside Tyler s control we can assume no liability for results obtained or damages incurred through the applications of the data presented SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE Page 4 J anuary 2000 Installation amp Service Manual L6FA L6FA Multi Shelf Frozen Food Merchandiser 45 gt 120 VOLT ELECTRICAL DATA AMPS 32 t RU as 19 24 120 VOLT LIGHTING AMPS T 8 ELECTRONIC BALLASTS STD LIGHTS OPTIONAL 800 MA 2ROW CANOPY LIGHTS 2 ROW 1 ROW 1 ROW NOSE s is 3 w sss 2 25
18. ing of electrical ter minals and or premature component fail ure NOTE Lower raceway cover will be shipped loose See the General I amp S Manual for raceway cover installation and removal instructions Since 208V defrost wiring enters the rear of the case through the outer air band the exterior and interior access holes must be caulked to maintain air band separation Case Fan Circuit This circuit has three sets of fans primary secondary and ambient that are supplied by an uninterrupted protected 120V circuit The case fan circuit is not cycled except when equipped for gas defrost On gas defrost cases the primary fans are controlled by a 60 30 klixon NOTE With gas defrost the primary fans will not restart until the coil temperature reaches 30 F at the fan delay thermostat Fluorescent Lamp Circuit The standard case lighting system is T 8 elec tronic lamps The standard lighting is 2 row of horizontal canopy lights and 1 row of nose lights J uly 1999 Installation amp Service Manual Defrost Information See General I amp S Manual for operational descriptions for each type of defrost control Defrost Control C hart Defrost Defrost Defrosts Duration Term Type PerDay Min Temp Electric 2 3 35 55 F Gas 3 4 22 25 60 F Use 70 F with electronic defrost sensor ESO SS s Frost lt lt S Gas Defrost Fan Delay The diagram shows the location for each
19. ith screws 4 2 6 Restore electrical power to the case 1 Defrost Heater Replacement gt WARNING lt Always shut off electricity to the entire case before replacing a defrost heater Automatic cycling of fans or electrical power to wire ends could cause personal injury and or death out ambient air filter 1 from air filter retainer 2 Inspect the ambient air filter 2 To replace the air filter slide new ambient air filter 1 in the air filter retainer 2 Use 10 X 24 X 1 fiberglass air filters NOTE Do not clean and or reuse old filters Poor ambient air flow will result 1 Remove bottom trays 1 from case 2 Disconnect defective defrost heater 3 and remove from the defrost heater sup port 4 and case 2 4 Install new defrost heater 3 in reverse order 5 Restore electrical power to the case Page 16 J uly 1999 Installation amp Service Manual L6FA PARTS INFORMATION Cladding and Trim Parts List Item Description e 8 12 1 Screw cover 5183536 3 5183536 3 5183536 3 2 Pull Up Angle Cover 5611559 2 5611559 2 5611559 2 3 Screw 5183536 8 5183536 8 5183536 8 4 Canopy Backer Painted 9025983 4 9025983 6 9025983 8 5 Canopy Hood Painted 9025222 9025223 9025224 6 Hand Rail Backer 9025316 9025316 9025316 7 Hand Rail Bumper Retainer color per order 8 Bumper Backer color p
20. three locations in the L6FA The primary fans 1 are located under the bottom trays and behind the prima ry condensing coil The secondary fans 2 are located on the top rear of the case in the secondary air band The ambient fans 3 are located on the top front of the case in the ambient air band The ambient fans are under the filters Page 14 Tyler Refrigeration Checking Air Velocities NOTE sure area above the case is clear Conditioned air must circulate above the case for the ambient air band intake Do notblock top ambient air band filter Check air velocities with an Alnor J r Model 8100 Velometer with airscoop modification Further information on the Velometer can be obtained from the TYLER Service Department L6FA case air velocities should be as fol lows Ambient Air 400 fpm Secondary Air 500 fom Primary Air 620 fpm before defrost 720 fpm after defrost J uly 1999 Installation amp Service Manual Cleaning Honeycomb The inner honeycomb primary should not require cleaning The outer honeycomb ambient secondary will require cleaning How often will depend on the amount of dust and lint in the store air Need for cleaning can be determined by comparing clean honeycomb air velocities with what velocities are being produced when they are checked Ambient Secondary Honeycomb Cleaning 1 Remove screws 1 lower light channel 2 and remove outer honeycomb
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