Operation & Installation Manual 01/28/2010
Contents
1. A mim 18 18 22 MB MASTER BILT Refrigeration Solutions 34v S3 3HON N3HM 19190 1v1S l 3NO OL SIL MASTER BILT MB ka men miy m Way A d E YW M o gt a 2 gt e JH N l3 WA v ata i AYES LE tions Refrigeration Solut MD REFRIGERATION SIZINING CHART 0074 OM L 3O9M9S8Z 509L0ZHS9 0096 S31 3O9SvY8Z OL8SOZHSW 8 L PUC 0 06 0074 OM I 3OM9SHZ 208 0ZHSH 0096 GAL AOMSVEZ OL8SOZHSW C C 787 0187 00576 OM I 3OM9S8Z7 209 402HS8 00 882 L0SOZHSIN L 8 7 97 019 DUC UC GAL ADMSVEZ OLSSOZHSW OO0reE 8982 L0SOZHSIN 8 PPC DUC UC S31 3O9MSv8Z OL8SOZHSW 00082 FMEESII LOSOZHHW C L PCC 40CC 006t lt 8982 LOSOZHSIN 00082 FMEESII L0SOZHHIN L C PUC vD 0C 006 8982 LOSOZHSIN 006 c 394428 LEFOZHHIN 8 8b 10 81 00261 AQMEESD LOSOZHHW 002. A NOTICE TO STORE OWNERS MANAGERS Moisture or liquid around or under the cabinet is a potential slip fall hazard for persons walking by or working in the general area of the cabinet Any cabinet malfunction or housekeeping problem that creates a slip fall hazard around or under the cabinet should be corrected immediately If moisture or liquid is observed around or under a Master Bilt cabinet an immediate investigation should be made by qualified personnel to determine the source of the moisture or liquid The investigation made should determine if the cabinet is malfunctioning or if there is a drain pipe leaking ELECTRICAL A WARNING Before servicing electrical components in the case make sure all power to case is off Always use a qualified technician NOTICE For models with electronic ballast only T om aff Standex Food Service ATTENTION CEMENT BALLAST YPE CC RATED For replacement ballast use only ballast that complies with UL Type CC rating if unit is equipped with electronic ballast It is very important that full voltage and overcurrent protection requirements for condensing units defrost heaters fans doors etc be provided at installation Wire sizing must be adequate to maintain full voltage under amperage loads specified in the charts on page 24 Wiring diagrams are provided for single cabinets and for lineups on pages 22 and 23 of this manual MIBMASTER BIT Refrigeration Solutio
3. 3 13 13124 Evaporator Fan Blade 2 15 13092 2 15 13092 3 15 13092 Evaporator Fan Guard 2 25 00205 2 25 00205 3 25 00205 Drum Thermometer 19 13586 19 13586 19 13586 Discharge Honeycomb Insert 29 01517 1 5 29 01517 2 29 01517 Shelf 8 33 01533 12 33 01533 16 33 01533 Standard 24 Flourescent Lamp N A N A Standard 36 Flourescent Lamp 2 1 23 01577 2 1 23 01576 2 1 23 01577 2 1 23 01577 Standard 48 Flourescent Lamp N A N A 2 1 23 01575 Lamp Shield 36 2 1 25 01274 4 2 25 01274 Lamp Shield 48 N A N A 2 1 25 01311 Ballast 23 01704 2 1 23 01704 2 1 25 01274 2 1 23 01704 Lampholder 4 2 23 50562 8 4 23 50562 8 4 23 50562 Lamp Switch 23 50793 23 50793 23 50793 Night Curtain 4 56 00058 N A 2 56 00058 Night Curtain 6 N A 56 00059 N A Curtain Mounting Bracket 2 56 00061 2 56 00061 b 56 00061 Curtain Spindle Holder 56 00060 56 00060 2 56 00060 Curtain Hold Down Hook 56 00050 56 00050 2 56 00050 MBMASTER BILT Refrigeration Solutions SALE AND DISPOSAL OWNER RESPONSIBILITY If you sell or give away your Master Bilt cabinet you must make sure that all safety labels and the Installation Service Manual are included
4. small quantities to store temperatures for short periods of time It is important to keep stock rotated properly so that older stock does not accumulate A First In First Out rotation practice will keep the products in good sellable condition Avoid loading the case so that product sticks out beyond the shelves or blocking the return air grille at the bottom ofthe case This will interfere with the air flow ofthe case and will result in diminished performance liim NN CLEANING Figure 15 mm To avoid electrical shock turn the power off before cleaning The MD series cabinets are designed so that spills will accumulate in a drain pan The drain pan is located underneath the return air grill Be sure to clean all areas with a mild detergent and water periodically DO NOT USE ABRASIVE CLEANERS NIGHT CURTAINS The MD cases are equipped with a heavy duty night curtain located just behind the the light bulbs All that is visible is the handle Using the night curtains properly will conserve a considerable amount of energy The night curtains should be lowered when the store is closed or the case is not in use There is a hook mounted on the lower front of the case that the handle of the curtain will catch in When raising the night curtains do not unhook the
5. adjusted by simply turning the knob clockwise for a colder case and counter clockwise for a warmer case The temp control should be set so that it cycles off when the discharge air at the honeycomb reaches 24 26 F The EPR valve should not be used to control temperature It is installed to prevent the evaporator pressure from becoming too low in the event of low charge low temperature control settings or a failed temperature SIN control If the EPR valve is not properly installed the evaporator coil could begin N ve J to ice Actual settings will vary from location to location depending on ambient N Mae conditions but the EPR valve should be set so that the evaporator pressure will not ee go below 47 58 Ibs for R 404a Figure 14 This will insure that the evaporator coil doesn t operate at a temperature too low CONTROL SETTINGS EPR Valve setting 45 60 psig Temperature Control Air Discharge Temperature 24 26 F at honeycomb Condensing Unit Defrost Settings 4 times day 6 hours 30 minutes fail safe Condensing Unit Low Pressure Control Cut in 20 Ibs Differential 16 lbs Condensing Unit High Pressure Control 425 Ibs This is a standard setting extreme cold climates may necessitate that the low pressure control be set to a 4 Ib cut out and 20 Ib differential ip IM BMASTER BILT Refrigeration Solutions STARTING PROCEDURE 1 Start compressor and allow to run at least 6 hou
6. canopy joiner trim Remove the screws that are in the canopy and move the canopy joiner trim into position Replace the screws that will retain the canopy joiner trim at the top Now mark and drill two 1 8 dia holes in the bottom of the canopy where the bottom holes of the canopy joiner trim will align Pop rivet the trim into place using 1 8 pop rivets as shown in Figure 4 The frontwall trim will attach to the frontwall using a good two sided adhesive tape or silicon caulking The bumper on the top and the front of the frontwall will help to hold this trim in place but an adhesive is also needed The kickplate joiner trim will attach to the adjoining kickplates using self drilling screws as shown in Figure 4 Figure 4 CANOPY JOINER TRIM FRONTWALL JOINER TRIM KICKPLATE JOINER TRIM 2 MBMASTER BILT Refrigeration Solutions INSTALLING JOINING TRIM MDT A trim kit for joining sections consists of three pieces the canopy joiner trim the frontwall joiner trim and the kickplate joiner trim Begin by removing the bumper trim and retainers on the frontwall Refer to the section of this manual for removing and replacing bumper trim The canopy joiner trim is attached by locating the holes in the top of the canopy that will line up with the holes in the canopy joiner trim Remove the screws that are on the underside of the canopy and move the canopy joiner trim into position Replace the screw
7. damage to the cabinet A DANGER Improper or faulty hook up of electrical components of the refrigeration units can result in severe injury or death All electrical wiring hook ups must be done in accordance with all applicable local regional or national standards A NOTICE Installation and service of the refrigeration and electrical components of the cabinet must be performed by a refrigeration mechanic and or a licensed electrician The portions of this manual covering refrigeration and electrical components contain technical instructions intended only for persons qualified to perform refrigeration and electrical work This manual cannot cover every installation use or service situation If you need additional information call or write us Customer Service Department Master Bilt Products Highway 15 North New Albany MS 38652 Phone 800 684 8988 Fax 800 684 8988 MBMASTER BILT Refrigeration Solutions WARNING LABELS AND SAFETY INSTRUCTIONS This symbol is the safety alert symbol When you see this symbol on your cabinet or in this manual be alert to the potential for personal injury or damage to your equipment Be sure you understand all safety messages and always follow recommended precautions and safe operating practices A NOTICE TO EMPLOYERS You must make sure that everyone who installs uses or services your cabinet is thoroughly familiar with all safety information and procedures Important safety i
8. must be installed at the approximate center of the riser The condensing unit should be located as closely as possible to the cabinet Keep the refrigeration lines as short as possible and use as few fittings as practicable being especially careful not to kink the lines Keep the layouts as Figure 14 simple as possible and properly support the piping to absorb vibration and the normal expansion and contraction caused by temperature changes All suction lines should be well insulated to minimize heat absorption and control condensate which could form on the suction line If tubular insulation is used the ends joints and any other open areas including slits necessary to fit the tubing over installed piping should be sealed with insulation glue A minimum amount of flux should be used as needed and a small amount of dry nitrogen should be fed into the tubing during brazing to minimize formation of scale and oxidation inside the tubing Leak check all joints with an electronic leak detector or halide torch If leaks are found relieve the pressure and make repairs as necessary and recheck Thoroughly caulk or foam all refrigeration line entry holes All openings for wiring should be sealed with N S F listed sealant to prevent air leaks and unwanted condensation i MBMASTER BILT Refrigeration Solutions REFRIGERATION SYSTEM EVACUATING AND CHARGING 1 Blow out all refrigerant lines with dry nitrogen or carbon dioxide to eliminate the po
9. with it If you need replacement labels or manuals Master Bilt will provide them free Contact the customer service department at Master Bilt at 800 684 8988 The customer service department at Master Bilt should be contacted at the time of sale or disposal of your cabinet so records may be kept of its new location a MBMASTER BILT Refrigeration Solutions en gt a ET E z E 2 e v vr aS5 amp 322365 doug roug 9 YO z43 N OL HO 143 L TWNINGAL OL 5 039 zug MOIOVINOO M3lv3H YO MEM ad N WNINHI3LI OL LHG 831V3H 1508430 N WO NI x f X NA N x o A zd EN 21 B MASTER BILT Refrigeration Solutions LOL Y qVNINS3L OL FK PS 7 NO 243 143 N IVNINS31 OL y 271 WNINUAL OL aa M A LHC x ya HN T ono AL ene D T e G ER C 7 gt NMI GO eK IO
10. 14 Refrigeration System Evacuating and Charging mm 15 EPR Valve Temperature Control pp 15 Control SettinS rt 15 STARTING PROCEDURE ka a a a RSK en cee ie 16 FINAL CHECK LIST RER BRD BIDENEERERPEFPERNGEFOFRELCEEPELDFEFECPRERCHCRRAPEREENEEFEREREFFURGEFERFBELTHFERLEEETTERFERPEROEU SER 16 LOADING 2 PIE 17 161 9 7 23 cmm 17 NIGHT CURTAINS x 17 SERVICE INSTRUCTIONS 2 cost oxen erre sa sa AEE nn aa Be nn ale ve nun en eg 18 MASTER BILT PART NUMBERS 22 mamaaa naamua namana nana aza ana namana nana ernennen unsre nn nn mnes nene 19 SALE AND DISPOSAL ave 20 WIRING DIAGRAM S E 21 23 MD REFRIGERATION SIZING CHART ses e x e ex ereer reenn 24 MBMASTER BILT Refrigeration Solutions INTRODUCTION Thank you for purchasing a Master Bilt cabinet This manual contains important instructions for installing using and servicing a Master Bilt MD series endless open air case Read all these documents carefully before installing or servicing your equipment This manual should be left in the care of the store owner or manager A NOTICE Read this manual before installing your cabinet Keep the manual and refer to it before doing any service on the equipment Failure to do so could result in personal injury or
11. 6 c 3934428 LEFOZHHIN 4 791 091 00261 9 LOSOZHHW 006 c 394428 LEFOZHHN L L 12147 047 0089 394290 LEFOZHHN 00271 F9M0ZSI LEEOZHHIN c cl ora DUC 9 L 3942085939 LEFOZHHN 009591 9 81 LOEOZHHN L L Ol vD 0L 00801 F9402SI LEEOZHHN 00 01 39McLSO L6L0ZHHIN L 7 8 10 8 0008 9 bLecOZHHW 0248 3940185939 LZLOZHHIN L 79 40 9 0008 9 LZCOZHHIN 0097 3940185939 LZLOZHHIN L PP 10 7 Dursuepuo 10 4 4 02 OL 6ulsuepuoo 10 9 4001 80 LGIN 90 pO LAN 4 001 LINN 3064 OL dA LINA TIVH3AO uonons JIN3ISNV uonong IN3Ig8NV WLOL 29 LL H9IH TWWYON Voi VvOv AFAINOFU STFIAON Refrigeration Solutions MBMASTER BILT 24
12. B MASTER BILT Refrigeration Solutions Mp Jana m 7 D JT Installation amp Operations Manual for MDT SERIES Open Display Merchandisers PN 063 90000 Rev 1 28 10LN MB MASTER BILT Refrigeration Solutions TABLE OF CONTENTS Page Numbers INTRODUCTION e 4 WARNING LABELS AND SAFETY HH enemies 5 PRE INSTALLATION INSTRUCTIONS c nn nn nn nun nn nn nem nene menie muse nne nenne nene nenne 6 Spection for ShippingDamage 2o teet nt b nra 27A 27274 ete ip Hess Homer near 6 INSTALLATION INSTRUCTIONS ese se x e een aa 6 Store Conditions eins a nenn re ee a FREIN 6 Morc TES 7 Leveling o ie etin etait loei iet ee i M Ei eee itp idees 7 JOINING a 8 Installing Joining Trim Tp oeste ea ka nn enter 9 Installing Joining Ti MOT 22 ee a Ne tees CINTIA 10 Installing the Endskirts and Kickplate 4 444s4s 04Hsnenenenannnan nennen IHR 11 Removing and Replacing Bumper em meme nehmen 11 Removing and Replacing the Ends pp 12 Removing and Replacing the Canopy e e K K e ee mme memet 12 STH e BTT TTT 13 ElectriGal i cte eter obe SEU are Dr nei 13 PIPING i see PPM in MI IM MDC LIA ALIM PE ed
13. CTIONS Remove the case from its shipping skid Set the first case into its desired position with required shims in preparation for joining it with its adjacent case The joining gasket for cases in a lineup is factory installed and is shown in black in Figure 2 This gasket is only required on one end of cases in a lineup as only one gasket is needed between two cases Inspect the gasket to insure that it is properly located and is not damaged The cases are now ready to be joined together Remove the second case from its shipping skid and move it into position against the end of the first case Properly level the second case with the appropriate shims Figure 2 Bolt the cases together through the seven holes that are provided in the steel end frame as shown in Figure 3 Tighten the bolts until all seams are fully closed Do not over tighten Repeat the above process for all other cases in the lineup Figure 3 i MBMASTER BILT Refrigeration Solutions INSTALLING JOINING TRIM MD A trim kit for joining sections consists of three pieces the canopy joiner trim the frontwall joiner trim and the kickplate joiner trim Begin by removing all of the bumper trim and retainers on the canopy and the frontwall Refer to the section of this manual for removing and replacing bumper trim The canopy joiner trim is attached by locating the holes in the top of the canopy that will line up with the holes in the
14. back of the case This space will allow for the circulation of air behind the case which will prevent condensation on the exterior surfaces MBMASTER BILT Refrigeration Solutions LOCATION Make sure that the floor will support this equipment is of adequate strength to prohibit sagging After confirming the dimensions of case measure off and mark on the floor the exact location of the cases for the entire lineup Snap chalk lines where the base skids of the case are to be located as shown in Figure 1 Figure 1 LEVELING It is very important that this equipment be perfectly level This will allow for proper and complete drainage of the evaporator coil and for proper case alignment A perfectly level area is generally not available where the equipment is to be installed Mark the location of all case joining points front and back Use a transitto locate the highest point on the chalk lines This point will be a reference point for determining shim pack heights Using the reference point mark the difference directly on the floor to each joining point front and back Shim each joining point to equal the reference point as required Tape all shims in place If the installation is an entire lineup install the case that will be positioned at the highest point first Check that the equipment in the lineup is level as the installation proceeds MBMASTER BILT Refrigeration Solutions JOINING SE
15. e used to get the bumper started as shown in Figure 7 Use the proper safetey precautions when removing the bumper The endcaps and the the bumper retainer can now be removed by removing the screws that attach the pieces to the cabinet Be sure to use the same type screws to replace the retainer and the endcaps Figure 7 MBMASTER BILT Refrigeration Solutions REMOVING AND REPLACING THE ENDS The ends are manufactured so that they will accept a 1 2 bolt These bolts should not be removed The ends are bolted to the cabinet as shown in Figure 8 through a keyslot rather than a hole To remove an end simply untighten the bolts lift up on the end and remove the end from the cabinet as shown in Figure 9 If you should accidently remove a bolt be sure to replace the bolt before attempting to replace the end onto the end frame When 1 replacing an end make 1 E sure that the cabinet is completely sealed but a do not overtighten the bolts and remember to inspect the gasket Rn prs material prior to 2 j f L K replacement Reverse Ass the procedure to replace the ends Figure 8 Figure 9 REMOVING AND REPLACING THE CANOPY MD ONLY Before the canopy can be removed the light bar must be unplugged from the cabinet There is a light plug access cover on the top of the canopy on the right end as shown in Figure 10 Remove this cover using a philli
16. handle and release it as the curtain will spring back into its raised position abruptly possibly damaging the curtain or the case Instead unhook the handle and gently guide the curtain back into its raised position This will extend the looks and the life of the curtain 17 SAFE PRODUCT LEVEL Figure 16 MBMASTER BILT Refrigeration Solutions SERVICE INSTRUCTIONS Trouble Shooting Guide 1 High head pressure and high back pressure A Condenser coil clogged or restricted B Condenser fan motor defective Low head pressure and low back pressure A Restriction in system B Refrigerant undercharged C Leak in system D EPR valve set too low Pressures normal cabinet warm A Coil blocked with frost or ice see 4 B Control set too warm C Air screen disturbance Coil blocked with frost or ice Defective temperature control EPR valve set too low Time clock not operating properly Improper time clock setting Ambient conditions above 75 F and 5595 RH Defrost heater not operating P trap in drain not installed Air screen disturbance Evaporator fan motor defective moou gt ronm Compressor starts and runs but cycles on overload Low voltage Dropped Phase 3 phase Overload protector defective High head pressure see 1 Relay or Capacitor Defective 1 phase moow Compressor will not star
17. nd note this on the bill of lading all copies prior to signing If damage is discovered when the cabinet is uncrated immediately call the delivering truck line and follow up the call with a written report indicating concealed damage to your shipment Ask for an immediate inspection of your concealed damage item Crating material must be retained to show the inspector from the truck line INSTALLATION INSTRUCTIONS GENERAL INSTRUCTIONS 1 Be sure the equipment is properly installed by competent service people 2 Keep the equipment clean and sanitary so it will meet your local sanitation codes 3 Rotate your stock so that older stock does not accumulate A First In First Out rotation practice will keep the products in good salable condition 4 Product should not be put in the case for at least 6 hours after it is started 5 Stock cases as quickly as possible exposing only small quantities to store temperatures for short periods of time 6 When replacing burned out fluorescent tubes be sure that the electrical power to the lighting circuit is turned off STORE CONDITIONS The Master Bilt MD cases are designed to operate in the controlled environment of an air conditioned store The store temperature should be at or below 75 F and a relative humidity of 55 or less At higher temperature or humidity conditions the performance of these cases may be affected and the capacity diminished It is not uncommon in a newly constructed st
18. nformation is presented in this section and throughout this section and throughout the manual The following signal words are used in the warnings and safety messages DANGER Severe injury or death will occur if you ignore the message WARNING Severe injury or death can occur if you ignore the message CAUTION Minor injury or damage to your cabinet can occur if you ignore the message NOTICE This is important installation operation or service information If you ignore the message you may damage your cabinet The warning and safety labels shown throughout this manual are placed on your Master Bilt Products cabinet at the factory Follow all warning label instructions If any warning or safety labels become lost or damaged call your customer service department at 601 534 9061 for replacements A DANGER High Voltage Turn power off CAUTION before servicing May have more GROUND REQUIRED than one disconnect switch FOR SAFE OPERATION This label is located on top of the electrical control This label is attached to the cabinet power cord label and on the wiring channel on models with a power cord MBMASTER BILT Refrigeration Solutions PRE INSTALLATION INSTRUCTIONS INSPECTION FOR SHIPPING DAMAGE You are responsible for filing all freight claims with the delivering truck line Inspect all cartons and crates for damage as soon as they arrive If damage is noted to shipping crates or cartons or if a shortage is fou
19. ns PIPING The recommended type of refrigerant used in the Master Bilt is R 22 Line sizes for most applications are given in the chart on page 24 Consult the Master Bilt Refrigeration Unit I amp O Manual for other applications The piping connections are made at the left end of the coil These lines have been capped and should be cut with a tubing cutter so as not to introduce copper shavings into the system Only clean dry sealed refrigeration grade AC hard copper tubing should be used There is a cutout near the front of the case which is used for bringing the lines from underneath the case It may be easiest to pre fabricate the lines as shown in Figure 12 and insert the line up through the bottom of the case If this is not possible there is an access cover which can be removed for ease of brazing and for service Be sure to install a suction line oil trap or P trap as shown in Figure 13 The skids are designed with a Figure 13 cutout in the rear of the skid for running refrigeration piping through the skids as shown in Figure 14 There is ample room for piping for the MD MDT and for another cabinet or lineup at the rear of the cabinet It recommended that all brazed joints be made with silver alloy type solders For roof top condensing units an inverted P trap must be installed in the suction line where the refrigeration lines exit onto the roof For vertical line runs of more than 20 feet a riser trap
20. ore for the temperature and humidity to be above design conditions These excessive conditions may produce sweating in the case until the store is operational and the ambient environment is more desirable The Master Bilt MD 06 08 should not be positioned where it is directly exposed to rays of the sun or near a direct source of radiant heat or air flow No HVAC return or supply air ducts may be located near case openings This will adversely affect the case air flow and will result in poor performance Do not open windows or doors that will affect the case air flow The maximum air velocity near the case air return is 50 FPM If this case is to be located against a wall there should be atleast a 6 space between the wall and the back of the case This space will allow for the circulation of air behind the case which will prevent condensation on the exterior surfaces These cases should always be loaded properly This unit will operate differently when loaded or unloaded Consult the section of this manual that specifies loading procedures A P trap is included with each case It is important that each case has a P trap installed Consult the section of this manual for installing and piping the drain To comply with Sanitation requirements the cabinet must be mounted on legs 6 high min or casters or the base must be sealed to the floor MDT with an N S F listed silicone sealant Minimum clearance allow atleast a 4 space between the wall and the
21. ps head screw driver to reveal the light plug and unplug the male end from the female end Now the canopy can be removed While carefully supporting the canopy use a phillips head screwdriver to remove the 10 self drilling sheet metal screws that attach the canopy to the cabinet as shown in Figure 11 Reverse this procedure to replace the canopy making sure that the male plug and the female plug are fully plugged into each other Figure 10 Figure 11 i MBMASTER BILT Refrigeration Solutions PLUMBING Each MD case has a P trap shipped loose It is very important that this trap be installed as it will result in diminished peformance of the case without it There is a P trap access cover which can be removed for better admittance to the trap as shown in Figure 12 The PVC P trap assembly must be glued to the PVC adapter on the bottom of the drain The drain can be run to the front or back or through the skids The top of the 1 1 2 drain can be accessed by removing the center insulated bottom panel An access cover can then be removed from the evaporator fan cover The drain is located at the center of the case in the drain pan Figure 12 Always install drains in accordance with local codes Use largest possible size pipe for drains 1 1 2 minimum is recommended Provide as much downhill slope as possible Prevent drains from freezing Do not install drains in contact with uninsulated suction lines BROWN
22. rs before placing product into the MD DURING THIS TESTING PERIOD YOU SHOULD 1 Check the temperature holding range against the the control setting 2 Check the defrost control system to see that all ice is removed from the coil during each defrost cycle 3 Check pressures 4 Check EPR Valve for proper pressure FINAL CHECK LIST A Check high low pressure control settings B Check setting of defrost timer 1 Four defrost 24 hours with 30 minutes fail safe C Check operating pressure D Check electrical requirements of unit to power supply voltage E Set temperature control for desired temperature range Set at 6 for most applications F Check setting of thermostatic expansion valve for proper operation Appprox 10 F superheat G Check sight glass for proper refrigerant charge H Check EPR Valve for proper pressure setting Check system for proper defrost settings and operation J Check condensing unit for vibrating or rubbing tubing Dampen or clamp as required K All valves should be completely open counter clockwise Check packing nuts on all service valves Replace all service valve caps and latch unit covers Check refrigeration line for proper P traps and proper locations o EE Check drain for proper P traps and proper locations MBMASTER BILT Refrigeration Solutions LOADING Do not place product in the case until 6 hours after it is started Stock cases as quickly as possible exposing only
23. s that will retain the canopy joiner trim at the bottom Use 10 self drilling screws to secure the canopy joiner trim at the top The frontwall trim will attach to the frontwall using a good two sided adhesive tape or silicon caulking The bumper on the top and the front of the frontwall will help to hold this trim in place but an adhesive is also needed The kickplate joiner trim will attach to the adjoining kickplates using sheet metal screws as shown in Figure 5 Figure 5 lt CANOPY p JOINER TRIM p MBMASTER BILT Refrigeration Solutions INSTALLING THE ENDSKIRTS AND KICKPLATE The kickplate should be installed prior to attaching the endskirts The endskirts are shipped loose Secure the kickplate to the flange of the wire raceway using the supplied sheet metal screws Use the supplied sheet metal screws to secure the kickplate to the bottom edge of the frame and the electrical raceway The bottom of the kickplate should be in contact with the floor Refer to Figure 6 for the placement of the Kickplate The endskirt will attach to the ends of the lineup using the supplied 10x1 2 self drilling screws as shown in Figure 6 Figure 6 REMOVING AND REPLACING BUMPER TRIM All of the bumper trim on the MD line is of the same type To remove a section begin at one end and unsnap the bumper from the retainer A screwdriver may have to b
24. ssibility of dirt scale etc remaining inside 2 Connect all lines and leak test all connections 3 Connect a good high vacuum pump to both the low and high side service valves 4 Operate the pump until a vacuum of 1500 microns 0 06 inches of mercury absolute pressure is obtained At this point the vacuum should be broken by the introduction of refrigerant into the system through a drier until the pressure is brought up to zero pounds gauge Repeat this procedure two more times During the final evacuation a vacuum of 500 microns 0 02 inches of mercury absolute pressure should be obtained After this vacuum is reached the system can be fully charged with refrigerant EPR VALVE TEMPERATURE CONTROL A NOTICE The evaporator pressure regulator valve EPR valve is not used to control temperature in the MD case This cabinet is equipped with a temperature control which should be properly field wired as a control for the system Refer to the wiring diagrams on pages 21 to 23 of this manual The factory installed temperature control is located at the right end of the evaporator fan cover as shown in Figure 14 This control can be exposed and adjusted by removing the bottom panels at the bottom of the case It is not necessary to open the evaporator fan cover to access these controls The sensing bulb for the temperature control is located between the evaporator fan covers and the fan housing in the return air The temperature control is
25. t hums but cycles on overload A Low voltage D Start capacitor defective B Relay defective E High head pressure see 1 C Overload protector defective Special service situations If moisture or liquid is observed around or under a Master Bilt cabinet an immediate investigation should be made by qualified personnel to determine the source of the moisture or liquid The investigation made should determine if the cabinet is malfunctioning or if there is a simple housekeeping problem Moisture or liquid around or under a cabinet is a potential slip fall hazard for persons walking by or working in the general area of the cabinet Any cabinet malfunction or housekeeping problem that creates a slip fall hazard around or under a cabinet should be corrected immediately P MBMASTER BILT Refrigeration Solutions MASTER BILT PART NUMBERS The table below gives Master Bilt part numbers Use this chart when ordering replacement parts for your MD cases All quantities are one each unless otherwise noted by parentheses Description Evaporator Coil MD 04 MDT 04 07 13230 MD 06 MDT 06 07 13209 MD 08 MDT 08 07 13199 Expansion Valve 09 09478 09 09468 09 09468 Defrost Heater 2 17 09273 2 17 09258 2 17 09259 Heater Safety 19 01307 19 01307 19 01307 Temperature Control 19 00844 19 00844 19 00844 Evaporator Fan Motor 2 13 13124 2 13 13124
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