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PRODUCT LOADThe main heat source in your walk-in is the amount of heat that must be removed fromthe stored product. For example, if you load your walk-in with 1,500 pounds of product at0 F, very little heat will have to be removed to obtain a temperature of -10 F. If the same1,500 pounds of product is delivered from your supplier at 25 F, you must pay to run therefrigeration system to remove this heat from each and every pound of product, until thesatisfactory temperature of -10 F is reached. You will have smaller utility bills if you let yoursupplier remove heat from the product, rather than doing it yourself.Remember, your unit is designed as either a holding unit (little or no product load) or hasbeen designed to compensate for known product load. It is important to tell your salesconsultant how you intend to use your unit. If significant product load occurs in a unitdesigned for holding, serious temperature problems may occur.LOADING YOUR WALK-INAlways move product into your walk-in as soon as you receive it. The longer you waitthe more heat it will absorb and the more you will pay to operate the walk-in. As you loadyour walk-in, be sure to allow plenty of airflow around the product because good airflowdecreases the amount of time needed to remove heat. Be sure to allow adequate roomaround the evaporator. As well, never have a product closer than 12 to 16 inches from theevaporator. Remember, the evaporator is hot during defrost and can thaw a product that istoo close.BASIC STRUCTUREThe structure of your walk-in is manufactured at our factory in Fort Wayne, Indiana. Fourinch, five-inch, or six-inch, two-pound density foam insulation (the most efficient insulationavailable) is used in the walls, floor, and ceiling of the unit. The base of the unit has a built-insteel frame providing tremendous strength and allows for easy movement or total portabilityshould your needs require this flexibility.The unit is completely encased in fiberglass.one continuous surface.which means noseams, no rivet holes, and no air leaks. Unlike other outdoor units, you will never have tocaulk splits or metal tears in your Polar King walk-in. No protective roofs or enclosures arerequired. You won’t pay to “cool the outside” with a Polar King unit. All the cold air stays inthe unit where it belongs. This equates to big dollar savings for you.REFRIGERATIONPolar King selects the best refrigeration components available for each walk-in application.Every system is engineered to provide maximum operating efficiency and years of troublefree operation. All units are adjusted to the customer’s temperature requirements. Trainedtechnicians test and monitor the performance of each unit for 24 hours prior to it leavingour factory.THROUGH-WALL INSTALLATIONPolar King walk-ins are designed for exterior installation. Units are delivered ready torun as “free standing” units. However, many customers use walk-through installation. Thisprovides the same convenience as an inside installation without taking up valuable andcostly interior floor space.Drawings are provided that detail slab elevations, dimensions for walk-through opening,and the flashing detail.Should you have any questions on a walk-through installation, please feel free to contactour sales or engineering departments.—7—

INSTALLATION INSTRUCTIONSPolar King walk-in coolers and/or freezers are delivered to our customers fully assembledand require only a few basic procedures prior to start-up. DO’S1.Provide a level slab as required by your local building code. It is very important that thesurface is level for proper drainage and operation. See Section 3 “Technical Information”for walk-through applications where walk-in unit is to be attached to the building.2.Condensing unit on the top (or back) of the walk-in should be a minimum of 6 feet fromany building intake or exhaust ventilation fans.3.Keep an open area of at least 3 feet around condensing unit to assure that sufficient airventilates across the compressor.4.Make sure you have adequate electrical service for your particular unit.5.Once walk-in is in place, a qualified electrician in accordance with the NEC and/orlocal electrical codes may then wire it. A wiring diagram is located on the back of theelectrical box panel on the condensing unit.6.Loosen compressor-mounting bolts (if supplied).7.Set the correct time of day on the defrost timer. This is necessary in order for the presetdefrost to occur at the desired times.8.If unit is delivered or sits idle in winter months, an external heat source should beapplied to the compressor crankcase for 12 to 24 hours prior to start-up.9.The unit is now ready for operation. (See sequence of operation.)10. Units are preset at the factory to automatically include four defrost cycles with a minimumduration of 30 minutes each. Preset defrost cycles may be changed to accommodatedifferent applications.DON’TS1.Do not physically alter any controls, switches, wires or any device carrying an electricalcurrent, without disconnecting power to the walk-in cooler and/or freezer.2.The box temperature is preset at the factory to customer request. Temperature selectionshould not be adjusted up or down. If a different temperature is required, contact PolarKing for proper procedure on changing the preset temperature.3.When cleaning the inside of the unit with any liquid substance, turn off electrical power.IMPORTANT: DO NOT USE BLEACH OR AMMONIA TO CLEAN INSIDE OF UNITAS IT MAY CAUSE DAMAGE TO THE EVAPORATOR COIL ALUMINUM FINS.4.IMPORTANT: DO NOT DISCONNECT MAIN POWER SUPPLY WHILE COMPRESSORIS RUNNING. DAMAGE MAY OCCUR AT RESTART IF COMPRESSOR IS NOTALLOWED TO PUMP DOWN.—8—

ROOF FLASHING INSTALLATION1.2.Read instructions thoroughly before starting. Take inventory of necessary materials.Items provided by Polar King include:a.12" Self-adhesive Elastoform flashing. (The adhesive side has a plastic film coveringthat should be removed prior to installation and the back side is uncovered.)b.45 cant strip (fillet strip).c.Pre-drilled aluminum termination bar.Additional items needed:a.Mechanical fasteners (screws or other type of fastener) for termination bar.b.Silicone sealant.3.See Flashing Detail for approximate placement of materials.4.Using mineral spirits, clean roof of walk-in and adjoining wall to a distance of 12".5.Place cant strips against building as shown on detail.6.Place flashing face up onto the cleaned area of the roof and wall, while keeping itcentered on the cant strip.7.Apply pressure to the flashing to be sure that there is a good bond against the roofand the wall.8.Install supplied termination bar over top edge of Elastoform flashing. Fastenapproximately 12" on center. (Fasteners are not included.)9.Apply bead of silicone sealant (not included) to top of termination bar to finish installation.The completed flashing assembly can be painted if desired.—9—

ROOF FLASHING DETAILEXISTING WALLSILICONE SEALANT (BY OTHERS)PRE-DRILLED TERMINATION BARFASTENERS 12" O.C. (BY OTHERS)APPROX. 5"12" SELF-ADHESIVEELASTOFORM FLASHING45" CANT STRIPWALK-IN ROOFAPPROX. 5"WALK-IN WALL— 10 —

SIDEWALL FLASHING INSTALLATION1.Read instructions thoroughly before starting. Take inventory of necessary materials.Items provided by Polar King include:a.2.PVC flashing (1" x 5" L-shape PVC material).Additional items needed:a.Mechanical fasteners (screws or rivets).b.Construction adhesive.c.Silicone sealant.3.Align PVC flashing against building and walk-in and trim for proper fit. Flashing may beapplied with short leg sticking out or in.4.Flashing can be attached to walk-in using any heavy-duty construction adhesive.5.Use sheet metal screws to hold in place until adhesive sets.6.Apply bead of silicone sealant to finish installation.— 11 —

PROVIDE A LEVEL SLAB AS REQUIRED BY YOUR LOCAL BUILDING CODE.NOTE: It is very important that the surface the walk-in will sit on is level and flat for properdrainage and mechanical operation.THROUGH WALL DETAILSSECTION VIEWROOF FLASHING DETAIL(SEE PG. 9)DOOR TRIM FLASHINGTHRESHOLDCURB DETAIL (SEE PG. 14)FRAME DETAIL (SEE PG. 13)REINFORCED CONCRETE SLABFOOTINGFINISHED FLOORBUILDING SLABBUILDING FOUNDATIONAll diagrams are available in larger format online in our resource center at www.polarking.com— 12 —

NOTE: The height may be adjusted to meet site conditions. The interior height can be anydimension from 6'-6" to 10'-2". Exterior height is determined by adding 11" to the interiorheight. Contact Polar KIng for applications requiring sloped roofs.STANDARD HEIGHT FREESTANDING UNIT7' - 6"8' - 5"10' – 3"10' – 5"11' – 4"1-1/2 & 2 HP3/4 & 1 HP3 HP & UPMAX HEIGHTMAX HEIGHTCOMPRESSION SIZEHEIGHT DETAILSAll diagrams are available in larger format online in our resource center at www.polarking.com— 13 —

11″14’-11″15’-10″BNumber ofTubesCExterior widthDAEXTERIOR WIDTHA— 14 —All diagrams are available in larger format online in our resource center at �36″34-1/2″Frame SpacingEND ELEVATION VIEW1-1/2" 3" 11 Ga.A513 STEEL TUBE24″––––––––––CB1-1/2" 1-1/2" 1/8"A36 STEEL /2″CFRAME DETAILS

— 15 —6-3/8″6-5/8″7-1/8″HEAVY DUTYEXTRA HEAVY DUTYPALLET JACK FLOOR1-1/4″3/4″1/2″SUBFLOOR THICKNESSOVERALLFLOORTHICKNESSSUB-FLOORING(SEE TABLE)80 MIL THICK FRP COMPOSITEON INTERIOR OF UNITNON-SKID FLOOR FINISHWITH28 GRADE SAND AGGREGRATEAll diagrams are available in larger format online in our resource center at www.polarking.comPOLYESTER RESIN AT 33% – 34% GLASS CONTENT WITH NO FILLER.FIBERGLASS SPRAY GUN ROVING (207 YARDS PER POUND YIELD) IN GENERAL PURPOSE100 MIL EXTERIOR OR 80 MIL INTERIOR REINFORCED FIBERGLASS CONSISTING OF:OVERALL THICKNESSFLOOR TYPEFLOOR THICKNESS1-1/2" 3" 11 GA. STEEL TUBE FRAME(SEE SPECIFICATION SHEET CAT-B3 FOR DETAILS)4" THICK 2.0 PCFNOMINAL DENSITYPOLYISOCYANURATEFOAM INSULATION100 MIL THICKFRP COMPOSITEON EXTERIOR OF UNIT4" OR 5"STANDARDINSULATIONCURB DETAILS

— 16 —32″44″80″86″DOOR HEIGHT24″36″72″79″(HEIGHT OF OPENING TO BE APPROXIMATELY8" GREATER THAN DOOR HEIGHT)FINISHED OPENINGHEIGHTDOORHEIGHTFLOORHEIGHT(SEE ″48″24″30″FINISHED DOOR OPENING DETAILSAll diagrams are available in larger format online in our resource center at www.polarking.com

TIEDOWN ANCHOR DETAILS— 17 —

END CAP ACCESSORY DETAILSEnd Cap Assemble1.Place the End Cap inside the open end of the frame.2.Tap the End Cap with a mallet or hammer until seated.STEEL FRAMEEND CAP— 18 —

BODY HARNESS ANCHOR POINTBody Harness Anchor PointWhen performing maintenance or other work on top of the unit, a Body Harness AnchorPoint is included with every Polar King Walk-In Unit. The body harness anchor point isintended for fall protection and is rated to a pullout strength of 5,000 lbs.TOUCHUP PAINT KIT (2-PART)Contents of Box Provided by Polar King: 1 Pint of Paint 8 OZ Hardener 4 OZ ThinnerWhat You Will Need: Small Bucket or Can to Mix Paint Safety Glasses and Gloves Paint Mixer or Wooden Stirring PaddleNote: Be Sure to Wear Both Safety Glasses and Gloves While Mixing Paint.Instructions for Mixing Touchup Paint:Both Paint Hardener and Paint Thinner have been premeasured. Ensure you use allcontents of each. Do Not add any additional paint or thinner.In a small bucket or can, pour in the Paint. Slowly mix in the Hardener and Thinner. Using apaint mixer or wooden stirring paddle, carefully mix the components together scraping boththe sides and bottom.Note: These items must be properly mixed in order to get the desired color and for the paintto dry properly.— 19 —

SEQUENCE OF OPERATION: COOLERS AND FREEZERSCOOLERSAll standard units are equipped with an adjustable thermostat located on the lowerright hand side of the evaporator coil, on the inside of the walk-in. All units are setat the factory to the temperature requested by the customer. Minor adjustments inoperating temperature may be made to suit your needs. Polar King recommends thatyou do not set the temperature colder than required, as this will cause unnecessarypower consumption. Recommended temperature for a cooler ranges from 34 F to 37 F, unless specified otherwise, for special applications.Refrigeration - Initial Start-UpWhen starting up the cooler refrigeration system for the first time, the following events occur.The operating sequence is as follows:1.Thermostat calls for refrigerant.2.Liquid line solenoid valve opens, allowing refrigerant to flow.3.Pressure control makes the control circuit and the condensing unit operates.4.When the room thermostat is satisfied, the liquid line solenoid will close, and thecompressor will pump down and turn off. (Fan on unit cooler will continue to run.)These units are designed for application conditions 33 F and above.CAUTION: DO NOT SET A COOLER BELOW 32 F OR DAMAGE MAY OCCUR.DefrostDefrost is accomplished during refrigeration off cycle. Four defrost cycles per dayare programmed at the factory (4 a.m., 10 a.m., 4 p.m., and 10:00 p.m.). It may benecessary to change the defrost cycle times to fit your work schedule.The interior temperature may rise slightly during the defrost cycle. Do not be alarmed.Soon after the cycle is complete, the unit will return to operating temperature.FREEZERSAll standard units are equipped with an adjustable thermostat located on the lowerright hand side of the evaporator coil, on the inside of the walk-in. All units are setat the factory to the temperature requested by the customer. Minor adjustments inoperating temperature may be made to suit your needs. Polar King recommendsthat you do not set the walk-in temperature colder than required, as this will causeunnecessary power consumption. Recommended temperature on a freezer rangesfrom 0 F to -10 F for frozen food, and -10 F to -15 F for ice cream.Refrigeration - Initial Start-UpWhen starting the system up for the first time, the fans will be delayed by the defrosttermination thermostat and will not operate until the coil temperature is approximately 20 F.The operating sequence is as follows:1.Thermostat calls for refrigerant.2.Liquid line solenoid valve opens, allowing refrigerant to flow.— 20 —

3.Pressure control makes the control circuit and the condensing unit operates.4.The coil temperature falls to approximately 20 F and the evaporator fans come on.NOTE: The fans may cycle two or three times until the room temperature is stabilized.)5.When the room thermostat is satisfied, the liquid line solenoid will close, and thecompressor will pump down and turn off. (Fan on unit cooler will continue to run.)Defrost(Time Initiated - Temperature Terminated)After a run period of approximately 6 hours, the evaporator coil will be frosted andrequire a defrost cycle. Four defrost cycles per day are programmed at the factory(4 a.m., 10 a.m., 4 p.m., and 10 p.m.). It may be necessary to change the defrostcycle times to fit your work schedule.The interior temperature may rise 10 F to 20 F during the defrost cycle. Do not bealarmed. No thawing of the product will occur. Soon after the cycle is complete, theunit will return to operating temperature.The defrost sequence is as follows:1.Timer starts defrost cycle.2.Liquid line solenoid valve closes, evaporator fans stop, and the defrost heaters areenergized.3.After pumping down, the compressor stops.4.The heaters warm the coil, melt the frost, and trip the termination thermostat at the settemperature.5.The defrost cycle is terminated, the liquid line solenoid opens, and defrost heaters arede-energized.6.The pressure switch closes and the compressor starts the refrigeration cycle.7.The evaporator fans will remain off until the coiltemperature reaches approximately 20 F.Should the termination thermostat fail to end thedefrost cycle, the timer fail-safe time is designed toend after 30 minutes.DURATIONLONGERDefrost Adjustments – FreezerSHORTEROptimal defrost is accomplished when the defrostcycle ends immediately after all the ice has clearedfrom the finned coil surface on the evaporator. Toolong or too short of a defrost period may causeoperational problems or waste electricity.The defrost periods set at the factory are for“average” freezer use. Depending on the frequencyof door openings and the ambient climate, it maybe necessary to make adjustments to the defrostcycle. ICE DROPLETS FORMING ON THECEILING is a sign that the system is remainingin defrost too long after the ice clears from thecoil fins. This can be corrected by turning thedefrost duration screw towards the “shorter”position (Figure 1).— 21 —DEFROST CONTROLFIGURE 1: DEFROST CONTROLLOCATED ON RIGHT END OFEVAPORATOR COIL(MLT MODELS ONLY)

If freezer still remains in defrost toolong, a defrost setting pin should beremoved from the timer clock (Figure2). Repeat if necessary. TIME OF DAYINDICATOR24 HOUR DIALTIMER PINICE BUILD-UP ON BACK OFEVAPORATOR COIL is a signthat the defrost period is notlong enough. Turn durationsetting towards the “longer”position (Figure 1). If build-upstill occurs, a defrost settingshould be added to the timerclock (Figure 2).DEFROSTFAIL-SAFETRIPPER FORTERMINATIONCYCLENOTE:If excessive ice build-up hasoccurred, it may be necessaryto manually melt away ice fromcoil surface prior to makingadjustments. System must beturned off in order to manuallydefrost the coil.between24 HOUR DIALSETCURRENTTIME11211 1091287324PM543AM5937268Not all freezers are adjustable.To find out if yours is, find thedefrost control (Figure 1), or callfor assistance.93.11 10Allow 24 hoursadjustments.FIGURE 2: DEFROST TIMER CLOCKLOCATED IN ELECTRICAL CONTROL PANELON TOP OF WALK-IN122.MANUALTIME SETTINGKNOB11.TIMEALIGNMENTMARKERMANUALTRIPPERS FORSETTING TIMEFIGURE 3: 2018 DEFROST TIMER CLOCKLOCATED IN ELECTRICAL CONTROL PANELON TOP OF WALK-IN— 22 —

TEMPERATURE ADJUSTMENT USING A421 THERMOSTATTo adjust temperature on your A421 thermostat:Press MENU button.a.2.3.Press MENU button again.a.The temperature the compressor will turn OFF

Polar King walk-in coolers and/or freezers are delivered to our customers fully assembled and require only a few basic procedures prior to start-up. DO'S 1. Provide a level slab as required by your local building code. It is very important that the surface is level for proper drainage and operation. See Section 3 "Technical Information"