Installation & Service Manual
Contents
1. 7 Electrical Considerations Defrost Information 8 Defrost Control Chart uua sedes na 8 Installation Procedure Check Lists See General UL NSF I amp S Man Wiring Diagrams 8 NHMGHP Domestic amp Export 50Hz Case Circuits 9 Cleaning and Sanitation See General UL NSF I amp S Manual Component Removal and Installation Instructions for Cleaning 11 Screens and Bottom Trays 11 Front Alr DUCE c aci 3 awe eh sees henna Redo WA eed 11 Rear Duct 5 tax agama a Bese 11 Discharge Air Honeycomb 11 L wer Cladding PPP 11 Upper Claddi g 2 xor x elas aed e Lee CUTS 11 Cleaning Instructions 12 Stainless Steel Cleaning Methods 12 Page 2 April 2007 Installation amp Service Manual NHMGHP Page General Information NSF Product 14 Radiant Heat Information 14 Radiant Heat Measurement 15 Display auus EL cee 15 Service Instructions Preventive Maintenance S2. 6 9025052 9020968 9025982 9606327 9025833 12 9026381 5183536 8 5183536 6 9039368 9039020 9039022 3 5183536 6 5222637 10 9022459 9022466 5200936 9025126 6 9025959 5048626 2 NHMGHP 8 9025058 9020971 9025982 color by order color by order color by order 9048399 9025833 12 9026382 5183536 8 5183536 6 9039016 9039020 9039022 3 5183536 6 5222637 11 9022459 9022466 5200936 9025127 NHMGHP g 9025959 5048626 2 TYLER REFRIGERATION 12 9025061 9020972 9025982 9605781 9025833 12 9026383 5183536 10 5183536 6 9039017 9039020 9039022 4 5183536 8 5222637 12 9022459 9022466 5200936 9025128 12 9025959 5048626 2 April 2007 Installation amp Service Manual NHMGHP A G N 7 5 NOTE For glass trim amp 13 components 8 7 Ya 15 14 see drawing below July 2006 Page 19
3. Z Carrier A United Technologies Company REFRIGERATION Wantage Installation amp Service vn TOP DISPLAY MEAT DELI CRITICAL TEMP PRODUCE HIGH PERFORMANCE MERCHANDISERS Medium Temperature Self Serve Display Cases This manual has been designed to be used in conjunction with the General UL NSF Installation amp Service Manual Save the Instructions in Both Manuals for Future Reference This merchandiser conforms to the American National Standard Institute amp NSF International Health and Sanitation standard ANSI NSF 7 2003 PRINTED IN Specifications subject to REPLACES ISSUE PART IN U S A change without notice EDITION 7 06 DATE 4 07 NO 9605849 REV C Tyler Refrigeration Niles Michigan 49120 TYLER NHMG HP REFRIGERATION CONTENTS Page_ Specifications NHMGHP Specification Sheets 4 Line Sizing Requirements See General UL NSF 1 5 Manual Pre Installation Responsibilities See General UL NSF 1 5 Manual Installation Procedures Carpentry Procedures 6 Case Pulp Locations 6 Plumbing Procedures See General UL NSF 1 5 Manual Refrigeration Procedures See General UL NSF 185 Manual Electronic Thermostat Control 6 Bottom MAYS oue sce md em eod ie Rohde a ice athe dob 1 Electrical Procedures
4. 6 Replace all components that were removed to expose the anti sweat wire 1 7 Restore electrical power to case Page 15 TYLER NHMG HP REFRIGERATION Front Glass Replacement 1 Unplug glass anti sweat wire 1 3 Remove two screw 2 and glass joint trim 3 from both joints of the broken glass 4 2 Remove screws 5 and glass trim rail 6 from top of glass 4 4 Loosen rear retainer 7 and remove broken glass 4 from glass retainer assembly 8 NOTE Inspect the anti sweat wire in glass retainer assembly If wire is damaged or broken replace it before replacing the front glass 5 Apply sealant tape 9 to top and bottom edge of new glass 4 6 Position new glass 4 in glass retainer assembly 8 and secure by tightening rear retainer 7 7 Install glass trim rail 6 with screws 5 over top edge of new glass 4 8 Install glass joint trim 3 with screw 2 over the joint areas of glass 4 9 Reconnect the anti sweat wire 1 Page 16 April 2007 Installation amp Service Manual NHMGHP PARTS INFORMATION 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 Motor 5125532 5125532 5125532 5222986 5222986 5 Watt 5 Watt 5 Watt 7 5 Watt 7 5 Watt Fan Motor Brackets 5962268 5962268 5962268 5962268 5962268 Fan Bracket Plate 9041077 9041077 9041077 9041077 9041077 Fan Blades 7 25 5B
5. on No 4 polished finish May scratch No 2 mill and No 7 and 8 polished finishes Use in direction of polish lines on No 4 polished finish May scratch No 2 mill and No 7 and 8 polished finishes Use in direction of polish lines on No 4 polished finish May scratch No 2 mill and No 7 and 8 polished finishes Use in direction of polish lines on No 4 polished finish May scratch No 2 mill and No 7 and 8 polished finishes Excellent removal satisfactory for use on all finishes Satisfactory for use on all finishes Satisfactory for use on all finishes Satisfactory for use on all finshes Effective on tenacious deposites or where scale has built up Satisfactory for use on all finishes Use of proprietary names is intended only to indicate a type of cleaner and does not constitute an endorsement nor is omission of any proprietary cleanser to imply its inadequacy It should be emphasized that all products should be used in strict accordance with instructions on package In all applications a sponge or fibrous brush or pad are recommended DO NOT use ordinary steel wool steel brushes chlorine bleach or product containing bleach for cleaning or sanitizing stainless steel April 2007 Page 13 NHMGHP GENERAL INFORMATION NSF Product Thermometer Installation 1 Unwrap the thermometer and bracket assembly shipped loose with the case 2 Position bracket in front l
6. Oakite No 33 Dilac Texo 12 Texo N Y Flash Klenz Caddy Cleaner Turco Scale 4368 or Permag 57 Vinegar 5 oxalic acid 5 sulamic acid 5 10 phospheric acid or Dilac Oakite No 33 Texo 12 or Texo N Y Organic solvents such as carbon tetrachloride tri chlorethylene acetone kero sene gasoline benzene alcohol and chlorethane n u APPLICATION METHOD Rub with a damp cloth Rub with a dry cloth Use a small amount of cleaner Rub with a dry cloth Rub with dry cloth Use a small amount of cleaner Apply with a damp sponge or cloth Rub with a damp cloth Apply generous coating Allow to stand for 10 15 min Repeated application may be necessary Swab and soak with clean cloth Let stand 15 minutes or more according to direc tions on package Rinse and dry Swab or wipe with a cloth Rinse with water and dry Swab or soak with a cloth Let stand 10 15 minutes Always follow with neutralizer rinse and dry Rub with a cloth Organic solvents may be flammable and or toxic Observe all precautions against fire Do not smoke while vapors are present Be sure area is well ventilated EFFECT ON FINISH Use in direction of polish lines on No 4 polished finish May scratch No 2 mill and No 7 and 8 polished finishes Use in direction of polish lines on No 4 polished finish May scratch No 2 mill and No 7 and 8 polished finishes Use in direction of polish lines
7. indicator will illuminate when the temperature reaches the differential setting When the temperature drops to the setpoint the relay and LED indicator will de energize and refrigeration will stop 27 F The settings above are specific to TYLER cases Other applications will require different setpoints and differentials July 2004 NHMGHP Bottom Trays All bottom trays should be installed with the lips down This assures proper case opera tion and sanitary practices Electrical Procedures Electrical Considerations CAUTION Make sure all electrical connections at components and terminal blocks are tight This prevents burning of electrical termi nals and or premature component failure NOTE The raceway houses the electrical wiring components and terminal blocks for the case Remove the lower front cladding to access the raceway Case Fan Circuit This circuit is to be supplied by an uninter rupted protected 120V circuit The case fan circuit is not cycled except when equipped for gas defrost On gas defrost cases the fan circuit is controlled by a 50 40 klixon NOTE With gas defrost the fans will not start until the coil temperature reaches 40 F at the fan delay thermostat Fluorescent Lamp Circuit NHMGHP optional canopy lighting is supplied by a single row of T 8 electronic ballast lights It is controlled by a light switch in each canopy light fixture Anti Sweat Circuit The N
8. 1 hour after defrost at the top discharge air duct using an ALNOR JR velometer with a scoop FOR SPECIFIC COMPRESSOR SIZING INFORMATION REFER TO TYLER APPLICATIONS FOR RACK SYSTEM COMPRESSORS AND OR THE COMPRESSOR MANUFACTURERS FOR SINGLE COMPRESSORS FOR LINE SIZING INFORMATION REFER TO THE MISCELLANEOUS SECTION BUFF IN THE TYLER SPECIFICATION GUIDE Electrical Data Fans and Heaters 120 Volt TOTAL TOTAL TOTAL STANDARD FANS ECM FANS ANTI SWEATS CASE FANS DISCHARGE AIR FRONT GLASS MODEL LENGTH CASE WATTS WATTS AMPS WATTS AMPS WATTS NHMGHP 6 2 0 68 604 044 220 0 22 270 007 84 NHMGHP 2 0 68 604 044 220 oso 360 120 NHMGHP 12 906 330 480 014 168 Defrost Data ELEK THERMOSTAT EPR CONVENTIONAL TERM AIR SENSOR SETTINGS SETTINGS COMPRESSOR SETTINGS DEFROST DEFROST DEFROSTS DURATION cur R22 R22 PsIG R404A PSIG WATER PERDAY TIME MIN OUT PSIG PSIG cut out cutn cur our LB FT DAY TIMEOFF 4 44 MEDTEMP 28 F 26 F 49 62 47 36 60 47 15 HOTGAS 4 15 45 MEDTEMP 49 62 47 36 eo 47 15 All high performance cases come with OFF CYCLE defrost NOTE 44 minutes is for EPR with suction stop for defrost isolation Defrost times increases by eight minutes 52 min total when defro
9. 2 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 diagram on page 9 and 10 covers the NHMGHP case circuits and defrost circuits April 2007 NHMGHP Domestic amp Export 50 Hz Case Circuits 6 8 amp 12 Cases ELA NHMGHP 1 6 8 12 DIAGRAM WRG DFR 9039600 REAR RISER ANTI SWEAT HEATER NAMANA NEE FRONT GLASS ANTI SWEAT HEATER WWW E DESCRIPTION Added 6 Model OPTIONAL SOLENOID VALVE Lo te FAN MOTORS 3 PER 12 CASE 2 6 8 CASE OPTIONAL CASE TEMPERATURE THERMOSTAT 120VAC 60HZ SUPPLY OR 220VAC 50Hz INTERNAT IONAL CASES MUST BE GROUNDED April 2007 Page 9 RI REFRIGERATION CORA ION 9059593 INA NHMGHP 6 8 12 CLAIMS RIGHTS 15 DRAWING ON i dE M DIAGRAM WRG HG DFR REAR RISER ANTI SWEAT HEATER E FRONT GLASS ANT SWEAT HEATER WANNA WE OPTIONAL FAN DELAY THERMOSTAT HOT GAS DEFROST OPENS 50 F CLOSES 40 F DESCRIPTION Added 6 Model OPTIONAL SOLENO D VALVE ER 12 CASE ER 6 OR 84 CASE m ul z lt a 2 lt 2 OPTIONAL CASE TEMPERATURE THERMOSTAT 5 OPTIONAL GAS DEFROST TERMINATION THERMOSTAT OPENS 45 F CLOSES 35 F 120 60HZ SUPPLY THERMOSTAT 15 MOUNTED OR ON THE PIPE BETWEEN 220VAC 50Hz THE DISTRUBITOR AND INTERNATIONAL THE CHECK VALVE ON
10. 5962268 5236974 5236974 7 30 5B O 5223370 5223370 Opt ECM Fan Motors 9025002 9025002 9025002 8 Watt 8 Watt 8 Waitt Opt ECM Fan Motor Brackets 9025005 9025005 9025005 Opt ECM Fan Blades 7 20 5B 5960943 5960943 5960943 Anti Sweat Heater Wire discharge air 5227379 5124216 5124217 5081147 5081148 glass 9039375 9039374 9039373 00 aaa Opt Gas Def Fan Delay 9023503 9023503 9023503 9023503 Opt Gas Def Term Klixon 45 35 0 9039592 9039592 9039592 9039592 NSF Product Thermometer 5967100 5967100 5967100 5967100 5967100 Initial build has 55 40 termination klixon P N 9023508 to be replaced with 45 35 termination klixon P N 9039592 as soon as it is available For information on operational parts not listed above contact the TYLER Service Parts Department April 2007 Page 17 NHMGHP Cladding and Trim Parts List Item Description Bumper Retainer Top Band Ptd Bumper Backer Bumper End Trim Bumper ON Oa Bb ON Screw Shoulder 10 Screw 11 Screw Shoulder 12 Kickplate Ptd Kickplate Joint Trim Ptd 13 Kickplate Support 14 Screw 15 Screw 16 LH Close off Ptd RH End Close off Ptd 17 Horizontal Joint Trim 18 Raceway Front Glass Trim Parts Item Description 1 Glass Joint Trim 2 Screw Page 18 Color Band Backer Ptd Upr Frt Cladding Ptd Lwr Frt Cladding Ptd
11. FFECT ON FINISH Satisfactory for use on all finishes Satisfactory for use on all finishes Provides barrier film Satisfactory for use on all finishes Satisfactory for use on all finishes if rubbing is light Use in direction of polish lines on No 4 polished finish May scratch No 2 mill and No 7 and 8 polished finishes Use in direction of polish lines on No 4 polished finish May scratch No 2 mill and No 7 and 8 polished finishes Use in direction of polish lines on No 4 polished finish May scratch No 2 mill and No 7 and 8 polished finishes Use in direction of polish lines on No 4 polished finish May scratch No 2 mill and No 7 and 8 polished finishes July 2006 Installation amp Service Manual NHMGHP TYPE OF CLEANING Heat tint or heavy discoloration Burnt on foods and grease fatty acids milkstone where swab bing or rubbing is not practical Tenacious deposits rusty discolorations industrial atmospheric stains Hard water spots and scale Grease and oil CLEANING AGENT Grade F Italian pumice Steel Bright Lumin Cleaner Zud or Restoro Penny Brite or Copper Brite Penny Brite or Copper Brite Paste NuSteel or DuBois Temp Revere Stainless Steel Cleaner Allen Polish Steel Bright Wyandotte or Zud Easy Off De Grease It 4 6 hot solution of such agents as trisodium tripolyphospate or 5 1596 caustic soda solution
12. HMGHP cases have two anti sweat heaters One in the rear riser for the dis charge air and an additional anti sweat heater for the front glass All anti sweat heaters are wired directly to the main power supply so they can operate at all times Page 7 NHMGHP Defrost Information See General UL NSF I amp S Manual for operational descriptions for each type of defrost control Defrost Control Chart NHMGHP Defrost Option Settings Defrost Defrost Defrosts Duration Term Per Day Min Temp Off Time 4 44 Gas 4 15 55 F See specification pages in this manual for pump down adjustment variations NHMGHP F D Gas Defrost Fan Delay All klixons are located on the right end of the evaporator coil The diagram shows the loca tion for each defrost type that uses a klixon NOTE The termination thermostat for gas defrost is located on the bypass check valve Page 8 TYLER REFRIGERATION 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 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 1
13. THE EVAPORATOR COIL CONTROL CIRCUITS NOTE ALL CASES MUST BE GROUNDED Page 10 April 2007 Installation amp Service Manual CLEANING AND SANITATION Component Removal and Installation Instructions for Cleaning Screens and Bottom Trays 1 Remove product from screens or bottom of case 2 To remove screens push up on each screen until bottom tabs clear holes in front duct then remove screen from case To remove bottom trays grasp and lift out each of the bottom trays from the case interior 3 After cleaning replace bottom trays with lips down in reverse order Front Air Ducts 1 Remove lower trays see this page 2 Lift out front air duct sections 3 After cleaning replace in reverse order Rear Duct Panels 1 Remove shelves and bottom trays see above 2 Remove mounting screws and rear duct panels from case 3 After cleaning replace and secure rear duct panels in reverse order July 2004 NHMGHP Discharge Air Honeycomb 1 Loosen screws securing rear retainer plate NOTE Note position of the honeycomb grid dur ing removal so it can be reinstalled the same way 2 Slide rear retainer plate back until the honeycomb grid sections can be removed from the top duct CAUTION Improper installation of the honeycomb grid section could result in improper air flow and or poor refrigeration 3 After cleaning replace honeycomb grid sections as they we
14. ay Voids in display raise surface temperature of package in front of void 2 to 6 F CAUTION The quality damage done to meat products by high temperatures and or contamination during delivery cooler storage cutting and wrapping cannot be repaired by placing the products into properly operating display cases SERVICE INSTRUCTIONS See General UL NSF I amp S Manual for fan blade and motor and color band and bumper replacement instructions July 2006 NHMGHP Anti Sweat Replacement The NHMGHP cases have two anti sweat heaters One in the rear riser for the discharge air and an additional anti sweat heater for the front glass All anti sweat heaters are wires that run the length of the above mentioned components Use the following instructions to replace an anti sweat heater WARNING Shut off or disconnect power supply to case before changing an anti sweat Electrical power from wire ends could damage other components and or cause personal injury or death 3 X Case Top Case Wires Channel 4 1 Expose the full length of the defective anti sweat wire 1 in the case 2 2 Disconnect or cut the defective anti sweat wire 1 from the case wires 8 3 Remove the aluminum tape 4 and defec tive anti sweat wire 1 from the case 2 4 Position new anti sweat wire 1 in case 2 and secure with new aluminum tape 4 5 Connect or splice the new anti sweat wire 1 to case wires 3
15. d or damage the glass WARNING TYLER Refrigeration does not recommend the use of high pressure cleaning equipment on display cases High pressure cleaners can penetrate and or damage the joint seals Damaged seals allow water leaks and or air leaks that can cause poor case refrigeration See General UL NSF I amp S Manual for case cleaning instructions Stainless Steel Cleaning Methods The cleaning data in the following stainless steel cleaning chart was supplied by AISI The information was supplied by Prime Metals Division Alumax Aluminum Corporation TYPE OF CLEANING Routine cleaning Smears and finger prints Stubborn spots and stains baked on splatter and other light discolorations Page 12 CLEANING AGENT Soap ammonia or deter gent and water Arcal 20 Lac O Nu Lumin Wash O Cedar Cream Polish Stainless Shine Allchem Concentrated Cleaner Samae Twinkle or Cameo Copper Cleaner Grade FFF Italian pumice whiting or talc Liquid NuSteel Paste NuSteel or DuBois Temp Cooper s Stainless Steel Cleaner Revere Stainless Steel Cleaner APPLICATION METHOD Sponge with cloth then rinse with clear water and wipe dry Rub with cloth as directed on the package Apply with damp sponge or cloth Rub with damp cloth Rub with damp cloth Rub with dry cloth Use a small amount of cleaner Rub with dry cloth Use a small amount of cleaner Apply with damp sponge or cloth E
16. ee General UL NSF I amp S Manual Fan Blade and Motor Replacement See Gen UL NSF I amp S Manual Color Band and Bumper Replacement See Gen UL NSF I amp S Manual Anti Sweat Replacement 15 Front Glass Replacement 16 Parts Information Operational Parts 17 Cladding and Trim Parts 18 TYLER Warranty See General UL NSF 1 5 Manual The following Medium Temperature Top Display High Performance Merchandiser models are covered in this manual MODEL DESCRIPTION NHMGHP 6 GLASS FRONT TOP DISPLAY HIGH PERFORMANCE MERCHANDISER NHMGHP 8 GLASS FRONT TOP DISPLAY HIGH PERFORMANCE MERCHANDISER NHMGHP 12 GLASS FRONT TOP DISPLAY HIGH PERFORMANCE MERCHANDISER April 2007 Page 3 TYLER NHMG HP REFRIGERATION SPECIFICATIONS NHMGHP Top Display High Performance Medium Temp Merchandisers DISCHARGE AIR Refrigeration Data CAPACITY AVG REF CASE EVAPORATOR CHARGE TEMPERATURE VELOCITY MODEL LENGTH PARALLEL CONVENTIONAL CF CF pu LBSFT 6 8712 MED TEMP 305 3477 24 275 029 For sizing all refrigeration equipment other than TYLER use conventional BTUH values Evaporator temperature is based on the saturated pressure leaving the case Air velocity measured
17. eft corner of the left most bottom tray Making sure the bracket is flush with the left edge use the bracket holes as a template for where to drill the holes 3 Drill two 196 holes in the bottom tray NOTE For ease of installation position the wash ers and capnuts on the top side of the bracket and bottom tray 4 Mount the bracket to the bottom tray with two screws washers and capnuts Page 14 TYLER REFRIGERATION AM Radiant Heat Information HEATING EFFECT OF VARIOUS TYPES OF LIGHTING AND INTENSITIES ON PACKAGED MEAT IN OPEN DISPLAY CASES HEAT ADDED TO MEAT SURFACE FROM LIGHT ALONE HEAT ADDED TO MEAT SURFACE FROM LIGHT ALONE NO 150 250 LIGHT LIGHTING INTENSITY IN FOOT CANDLES AT MEAT LEVEL HOW CEILINGS OVER OPEN MEAT CASES AFFECT PACKAGED MEAT L RADIANT HEAT PROPER VENTILATION ABOVE THE CEILING DY FOR HIGH CI ISTHEREMEI CEILING TEMPERATURES CEILING TEMPERATURE DEGREES F CEILING TEMPERATURE DEGREES F MEAT SURFACE TEMPERATURE RISE FROM RADIANT HEAT A wide temperature range is shown for each type of lighting This data does not show all situations Many situations will have higher package warm up figures than indicated It is generally known that the temperature of displayed meat in refrigerated cases will run higher than the circulated air temperature of the cases A dial thermometer stuck into the center of a piece of meat compared with one in the air s
18. rd The sensor leads are interchangeable Heating Cooling Mode f Cut out at Setpoint ST Cut in at Setpoint 1 Keypad Lock 1 Unlocked V Locked 3 Set the Heating Cooling jumper blocks to the COOL position 4 Set the Cut in at Setpoint Cut out at Setpoint jumper blocks to the Cut out at Setpoint position 5 Set the keypad Locked Unlocked jumper blocks to the Unlocked position 6 Replace the electronic thermostat cover and secure with four screws April 2007 Installation amp Service Manual A419 LCD Displa 8 Fahrenheit Celsius Symbol Heating Cooling Mode Icon LED Up Button 7 To adjust the setpoint a Push the Menu Button SP will flash on the LCD display b Push the Menu Button one more time and a setpoint temperature will be displayed c Push the Up or Down Button until the desired setpoint is displayed NHMGHP d Push the Menu Button 8 To adjust the differential a Push the Menu Button SP will flash on the LCD display b Push the Down Button until DIF is shown on the LCD display c Push the Menu Button one more time and a differential number will be displayed d Push the Up or Down Button until the desired differential setting is displayed NHMGHP all applications 2 F d Push the Menu Button With the cooling mode selected the differential is ABOVE the setpoint The relay will energize and the LED
19. re removed and secure with the rear retainer plate and screws Lower Cladding 1 Remove kickplate from kickplate sup ports See General UL NSF I amp S Manual 2 Remove mounting screws from top and bottom of lower cladding and remove lower cladding 3 After cleaning replace in reverse order Upper Cladding 1 Remove lower cladding see above 2 Remove color band bumper and bumper retainer from case See General UL NSF I amp S Manual 2 Remove mounting screws from top and bottom of upper cladding and remove upper cladding 3 After cleaning replace upper cladding and remaining components in reverse order Page 11 TYLER REFRIGERATION NHMGHP Cleaning Instructions CAUTION When cleaning this case try not to introduce water into the case faster than it can be carried away by the waste outlet Liquid chlorine bleach is corrosive to metals The use of bleach or products containing bleach will damage metal surfaces and void the case warranty e Sanitizr the case with Quaternary Ammonium Solutions ex KAYQUAT J 512 Sanitizer SANIQUAT 512 etc approved per 21CFR 178 1010 followed by adequate draining and air drying These solutions may be obtained from Kay Chemical Co Johnson Wax Professional Coastwide Laboratories etc Always use a soft cloth or sponge with mild detergent and water to clean the front glass Never use abrasives or scouring pads to clean glass They can scratch an
20. st isolation is by pump down If EPR is utilized use the settings shown in the chart NOTE The customer will need to set the EPR on the parallel rack or single unit to the appropriate suction temperature and the NM G HP cases must be on a separate suction stub with a separate EPR ADD 0 54 to EPR setting for each 1000 foot rise in elevation Required setup for a conventional unit uses an electronic thermostat to assure accurate temperature control CASE TO CASE SUCTION LINE SUB FEED BRANCH LINE SIZING e 12 w 2v 2o sz ao CASE CIRCUITS This case requires a 120V circuit for fans and anti sweat heaters UL SANITATION approved in accordance with ANSI NSF 7 CASE BTUH REQUIREMENTS are calculated to produce approximately the indicated entering air temperature with absolute maximum operating ambient limits of 75 F amp 55RH The information contained herein is based on technical analysis and or tests performed in a controlled lab environment that are consistent with industry practices and is intended as a reference for system sizing and configuration purposes only and for use by persons having technical skill at their own discretion and risk Conditions of use are outside of Tyler s control and we do not assume and hereby disclaim any liability for results obtained or damages incurred through application of or reliance on the data presented incl
21. tream quickly confirms this fact Another fact is that the surface temperature of the meat will be higher than the center temperature due to radiant heat TYLER s ongoing research identifies sources of radiant heat and accurately measures and records it These charts were developed from the information gathered during this research Two major sources of radiant heat are from display lights and ceiling surfaces Additional heat sources come from bad display prac tices which either overload the case with product or allow voids in the product display April 2007 Installation amp Service Manual Poor display practices impair the efficiency of the refrigeration adding to the surface temper ature of the meat Bacteria and molds grow when surface temperatures rise above 45 F This prematurely discolors displayed meats and causes unnecessary meat department losses Radiant Heat Measurement Place two accurate dial thermometers side by side a case Cover one of the thermometer stems with black friction tape The tempera ture difference is the approximate amount of radiant heat A change in display lighting or a reduction of high ceiling temperatures over 80 F could reduce the radiant heat in the case Display Practices 2 to 6 F Encourage butchers to maintain all meat below the case load lines and to eliminate product voids Case screens could be covered in some instances to keep the refrigerated air over the displ
22. uding but not limited to specific energy consumption with any particular model or installed application SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE Page 4 April 2008 Installation amp Service Manual NHMGHP CROSS SECTION 27 3 4 e 15 1 4 43 FLOOR PLAN Add 1 1 2 6 8 or 12 for Standard Patch End Base flush with rear of case Refrigeration April 2008 Page 5 NHMGHP INSTALLATION PROCEDURES Carpentry Procedures Case Pull Up Locations The NHMGHP models have two pull ups at each end of the case Pull ups A and B are located as shown and should be installed and tightened starting with A and finishing with B See General UL NSF I amp S Manual for line up assembly instructions Refrigeration Procedures Refrigeration system and superheat instruc tions can be found in the General UL NSF I amp S Manual Electronic temperature control information is listed below Page 6 TYLER REFRIGERATION Electronic Temperature Control Whenever an NHMGHP uses an electronic thermostat and solenoid valve for tempera ture control use the following instructions to properly set up the electronic thermostat Setting the Electronic Thermostat 1 Remove the four screws and cover from the electronic thermostat 2 Connect sensor wires to the common COM and sensor SEN terminals of the terminal strip located at the top left of the printed circuit boa
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