KMD-201AA KMD-201AWA - Hoshizaki

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7) Evacuation, Vacuum Pump and Refrigerant Charge [R404A]Never allow the oil in the vacuum pump to flow backward. The vacuum level and vacuumpump may be the same as those for the current refrigerants. However, the rubber hoseand gauge manifold to be used for evacuation and refrigerant charge should be exclusivelyfor R404A.8) Refrigerant Leak CheckRefrigerant leaks can be detected by charging the unit with a little refrigerant, raising thepressure with nitrogen and using an electronic detector. Do not use air or oxygen insteadof nitrogen for this purpose, or rise in pressure as well as in temperature may causeR404A to suddenly react with oxygen and explode. Be sure to use nitrogen to preventexplosion.[b] REFRIGERANT RECOVERYThe icemaker unit is provided with refrigerant access valves. Using proper refrigerantpractices, recover the refrigerant from the access valves and store it in an approvedcontainer. Do not discharge the refrigerant into the atmosphere.[c] EVACUATION AND RECHARGE1) Attach a vacuum pump to the system. Be sure to connect charging hoses to both highand low-side access valves.2) Turn on the vacuum pump. Open the service manifold valves. Never allow the oil in thevacuum pump to flow backwards.3) Allow the vacuum pump to pull down to a 760 mmHg vacuum. Evacuating perioddepends on pump capacity.4) Close the low-side valve and high-side valve on the service manifold.5) Disconnect the vacuum pump and attach a refrigerant service cylinder to the high-sideline. Remember to loosen the connection and purge the air from the hose. For air-cooledand water-cooled models, see the nameplate for the required refrigerant charge.6) A liquid charge is recommended for charging an R-404A system. Invert the servicecylinder and place it on scales. Open the high-side valve on the service manifold.7) Allow the system to charge with liquid until the proper charge weight is met.8) If necessary, add any remaining charge to the system through the low-side. Use athrottling valve or liquid dispensing device to add the remaining liquid charge through thelow-side access port with the unit running.9) Close the service manifold valves and disconnect the service manifold hoses.10) Cap the access valves to prevent a possible leak.31
2. BRAZINGNote: All brazing connections inside the bin are clear coated. Sandpaper the brazingconnections before unbrazing the components. Use a good abrasive cloth to removethe coating.3. COMPRESSOR1) Turn off the power supply.2) Remove the panels and water tank. See "V. 14. WATER TANK."32
Page 1 and 2: NO. F037-775ISSUED: JUN. 15, 2009RE
Page 3 and 4: [a] NO ICE PRODUCTION -------------
Page 6 and 7: II. GENERAL INFORMATION1. CONSTRUCT
Page 9 and 10: [e] NORMAL HARVEST CYCLELEDs 5, 6,
Page 11 and 12: 3. CONTROL BOARD* A HOSHIZAKI exclu
Page 13 and 14: [b] FEATURESa) Maximum Water Supply
Page 15 and 16: [c] CONTROLS AND ADJUSTMENTSa) Defa
Page 17 and 18: f) Freeze Timer (S1 dip switch 9 &
Page 19 and 20: 5. FLOAT SWITCH[a] EXPLANATION OF O
Page 21 and 22: 7. SWITCHESTwo different control sw
Page 23 and 24: 2. WIRING DIAGRAM20
Page 25 and 26: IV. SERVICE DIAGNOSIS1. 10-MINUTE D
Page 27 and 28: 2. DIAGNOSTIC CHARTS[a] NO ICE PROD
Page 29 and 30: 1. See "II. 3. [d] ControlBoard Che
Page 31 and 32: 1. See "II. 3. [d] ControlBoard Che
Page 33: V. REMOVAL AND REPLACEMENT1. SERVIC
Page 37 and 38: 5) Remove the Drier using brazing e
Page 39 and 40: 9) Evacuate the system, and charge
Page 41 and 42: 19) Turn on the power supply.9. ADJ
Page 43 and 44: 7) Remove the Hose Band connecting
Page 45 and 46: 10) Install the new water tank in t
Page 47 and 48: 8) Connect the bin control connecto
Page 49 and 50: 5) Refit the removed parts in the r
Page 51 and 52: 2) Install the new Run Capacitor in
Page 53 and 54: VI. CLEANING AND MAINTENANCE INSTRU
Page 55 and 56: g. Wipe down the float switch housi
Page 57 and 58: [a] STAINLESS STEEL EXTERIORTo prev
Page 59: 4) Turn off the power supply and re

KMD-201AA KMD-201AWA - Hoshizaki

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