WEBVTT 1 00:00:01.260 --> 00:00:03.300 Before we begin the basic operation, 2 00:00:03.660 --> 00:00:08.040 let's look at some of the features and benefits that make Hoshizaki machines so 3 00:00:08.040 --> 00:00:09.510 dependable and serviceable. 4 00:00:10.920 --> 00:00:15.510 Regular maintenance checks and servicing are made easier with the KM cubers 5 00:00:15.510 --> 00:00:16.770 removable panels. 6 00:00:17.730 --> 00:00:21.060 The components sections are divided into separate compartments, 7 00:00:21.420 --> 00:00:23.880 free from the damaging effects of moisture. 8 00:00:25.050 --> 00:00:30.030 Separating the evaporator or wet section from the dry electrical components of 9 00:00:30.030 --> 00:00:33.420 our machines, helps eliminate many problem areas. 10 00:00:34.530 --> 00:00:38.460 Dividing these compartments also helps insulate the heat generated by the 11 00:00:38.460 --> 00:00:40.500 compressor from the cold section, 12 00:00:40.740 --> 00:00:43.680 making the KM cuber more energy efficient. 13 00:00:44.940 --> 00:00:46.980 Unlike other ice makers on the market, 14 00:00:47.130 --> 00:00:51.480 the KM Cuber's pump motor is housed in a separate insulated compartment 15 00:00:51.840 --> 00:00:54.210 away from the moisture of the evaporator. 16 00:00:54.450 --> 00:00:59.340 Reducing corrosion bearing and winding failures. Tt the 17 00:00:59.340 --> 00:01:03.780 heart of our pump assembly is a more efficient, permanent split capacitor motor. 18 00:01:04.410 --> 00:01:09.330 This assembly can be easily removed and rebuilt in the field. The 19 00:01:09.330 --> 00:01:13.770 sealed evaporator section has a smaller ice drop zone than other ice makers. 20 00:01:14.310 --> 00:01:15.450 During operation, 21 00:01:15.510 --> 00:01:19.680 positive air pressure helps to reduce the airflow around the evaporator, 22 00:01:19.950 --> 00:01:23.730 keeping airborne bacteria out, and reducing algae growth. 23 00:01:24.840 --> 00:01:29.160 Many manufacturers build evaporator plates in welded sections of copper, 24 00:01:29.190 --> 00:01:32.310 which are plated with nickel or tin. Plating 25 00:01:32.400 --> 00:01:37.260 the copper is necessary for sanitation and to allow the ice to harvest properly, 26 00:01:37.650 --> 00:01:42.330 but it may flake and peel from the copper with age contaminating the ice. 27 00:01:43.290 --> 00:01:47.340 The unique plate design of hoshizaki's evaporator with its stainless steel 28 00:01:47.340 --> 00:01:52.020 freezing surface and oval shaped serpentine tubing produces a crystal 29 00:01:52.020 --> 00:01:54.450 clear, crescent shaped hard cube of ice, 30 00:01:54.780 --> 00:01:58.410 which displaces more liquid than square or diced cubes. 31 00:01:59.460 --> 00:02:02.850 Since pure water freezes first on the evaporator plate, 32 00:02:03.120 --> 00:02:05.850 minerals are left to run off into the reservoir, 33 00:02:06.120 --> 00:02:10.200 reducing scale buildup and saving frequent and expensive cleaning. 34 00:02:11.550 --> 00:02:14.570 Removable panels, separate compartments, 35 00:02:15.490 --> 00:02:17.460 insulated evaporator section, 36 00:02:18.300 --> 00:02:23.190 efficient rebuildable pump assembly, small ice drop zone, 37 00:02:23.520 --> 00:02:25.890 and unique stainless steel evaporator. 38 00:02:26.580 --> 00:02:31.320 Just some of the features and benefits of the KM Cuber that help make your job 39 00:02:31.350 --> 00:02:32.183 easier. 40 00:02:33.090 --> 00:02:37.860 Now let's look at the basic sequence of operation of the Hoshizaki KM cuber. 41 00:02:40.290 --> 00:02:43.020 When the power switch is turned to the ice position, 42 00:02:43.320 --> 00:02:47.940 the inlet water valve opens allowing water to enter and fill the reservoir. 43 00:02:49.140 --> 00:02:53.190 The one minute fill cycle assures that the ice machine will not start until 44 00:02:53.190 --> 00:02:57.630 there is sufficient water eliminating overheated pumps and compressor 45 00:02:57.630 --> 00:02:59.980 problems. After one minute, 46 00:03:00.040 --> 00:03:03.580 the controller board checks to see if the float switch is closed, 47 00:03:03.760 --> 00:03:07.780 and if not repeats the fill cycle until the water level is sufficient. 48 00:03:08.770 --> 00:03:13.480 The float switch check also occurs at the end of each harvest cycle to ensure 49 00:03:13.480 --> 00:03:16.060 continuous automatic low water safety. 50 00:03:17.200 --> 00:03:21.370 When the switch is closed, the controller starts the initial harvest cycle, 51 00:03:21.730 --> 00:03:24.220 which runs approximately two to three minutes, 52 00:03:24.220 --> 00:03:26.800 depending on ambient air and water temperature. 53 00:03:28.330 --> 00:03:32.680 First hot gas from the compressor enters the serpentine coils of the 54 00:03:32.680 --> 00:03:37.390 evaporator while the inlet water valve remains open to assist in the harvest. 55 00:03:38.230 --> 00:03:42.520 This causes any ice remaining from the previous cycle to be released from the 56 00:03:42.520 --> 00:03:45.700 plate while water continues to fill the reservoir. 57 00:03:46.810 --> 00:03:50.980 Starting the compressor in the harvest cycle with the hot gas valve open 58 00:03:51.340 --> 00:03:54.790 provides a no load start, better efficiency, 59 00:03:55.060 --> 00:03:58.030 and longer life of the compressor and components. 60 00:04:00.190 --> 00:04:04.270 When the thermistor senses that the evaporator temperature has reached 48 61 00:04:04.270 --> 00:04:05.103 degrees, 62 00:04:05.200 --> 00:04:09.880 the solid state defrost completion timer on the circuit board takes control of 63 00:04:09.880 --> 00:04:14.230 the remainder of the harvest cycle. During the harvest cycle, 64 00:04:14.230 --> 00:04:18.610 the inlet water valve brings water through the supply tube and down the center 65 00:04:18.610 --> 00:04:20.110 of the evaporator plates. 66 00:04:21.010 --> 00:04:25.090 This water flow also helps transfer heat from the serpentine coils to the 67 00:04:25.090 --> 00:04:29.470 stainless steel plates and pre chills the water flowing into the reservoir. 68 00:04:31.510 --> 00:04:32.920 During the freeze cycle, 69 00:04:33.100 --> 00:04:36.850 water is pumped to the outside of the plates through the distributor tubes. 70 00:04:38.020 --> 00:04:42.040 In the freeze cycle, the hot gas and water valves are closed. 71 00:04:42.550 --> 00:04:46.000 As the self-contained condenser fan and pump motor starts, 72 00:04:46.330 --> 00:04:51.310 water is circulated up and across the outside of the evaporator plate and 73 00:04:51.310 --> 00:04:52.960 back down into the reservoir. 74 00:04:54.010 --> 00:04:57.970 The circuit board controls the freeze cycle for the first five minutes, 75 00:04:57.970 --> 00:05:02.590 providing short cycle protection. The float switch then assumes 76 00:05:02.590 --> 00:05:04.840 control to initiate the next harvest. 77 00:05:05.680 --> 00:05:07.750 If power to the machine is interrupted, 78 00:05:07.930 --> 00:05:11.440 the unit will always restart and the one minute fill cycle. 79 00:05:13.000 --> 00:05:14.590 Before the second harvest, 80 00:05:14.650 --> 00:05:19.030 a ten second pump out cycle occurs as the hot gas valve 81 00:05:19.030 --> 00:05:22.120 opens, allowing gas to warm up the evaporator. 82 00:05:22.450 --> 00:05:26.710 The pump motor stops for two seconds, then begins again in reverse. 83 00:05:27.340 --> 00:05:31.480 This pumps out the water containing concentrated minerals from the bottom of the 84 00:05:31.480 --> 00:05:36.310 reservoir through the check valve and out the drain. At the same time, 85 00:05:36.400 --> 00:05:39.220 water is used to power flush the float switch. 86 00:05:41.590 --> 00:05:42.630 For improved cleaning, 87 00:05:42.880 --> 00:05:47.200 the pump out timer on the circuit board may be adjusted to lengthen the cycle to 88 00:05:47.200 --> 00:05:48.160 20 seconds. 89 00:05:48.790 --> 00:05:53.200 It can also be adjusted to occur every 1, 2, 5, 90 00:05:53.200 --> 00:05:54.460 or 10 cycles. 91 00:05:55.630 --> 00:05:59.420 These adjustments provide the service technician with the flexibility to 92 00:05:59.420 --> 00:06:04.280 overcome some problems associated with the high mineral content present in some 93 00:06:04.280 --> 00:06:05.660 local water supplies. 94 00:06:07.280 --> 00:06:09.380 When the pump out cycle is completed, 95 00:06:09.380 --> 00:06:12.830 the pump motor stops and the inlet water valve opens. 96 00:06:13.610 --> 00:06:15.440 Just as in the initial harvest, 97 00:06:15.590 --> 00:06:20.510 the evaporator is warmed by the hot gas defrost and water assist, clearing 98 00:06:20.510 --> 00:06:24.980 any ice left frozen on the plate as the reservoir then refills in 99 00:06:24.980 --> 00:06:27.080 preparation for the next freeze cycle. 100 00:06:28.400 --> 00:06:32.750 The water level in the reservoir always overflows the standpipe at the end of 101 00:06:32.750 --> 00:06:37.730 the harvest cycle. On top of the standpipe is a displacement cap, 102 00:06:37.790 --> 00:06:41.870 which pulls additional minerals from the bottom of the reservoir and flushes 103 00:06:41.870 --> 00:06:42.703 them. 104 00:06:42.860 --> 00:06:47.480 This cleaning action can be extended by lengthening the defrost completion timer 105 00:06:47.480 --> 00:06:52.070 setting. When the bin is filled with ice, 106 00:06:52.100 --> 00:06:55.700 the machine automatically shuts off until more ice is needed. 107 00:06:56.420 --> 00:06:59.210 Let's review the basic sequence of operation. 108 00:07:00.020 --> 00:07:03.710 The icemaker always starts with the one minute fill cycle. 109 00:07:04.550 --> 00:07:09.500 The initial harvest cycle clears ice from the plate, assures a full reservoir, 110 00:07:09.560 --> 00:07:11.720 and allows quickened easy compressor 111 00:07:11.720 --> 00:07:15.680 starting. After five minutes in the freeze cycle, 112 00:07:15.890 --> 00:07:19.520 the float switch assumes control to initiate the next harvest. 113 00:07:20.360 --> 00:07:24.110 The 10 to 22nd pump out cleans the reservoir every 114 00:07:24.110 --> 00:07:27.500 1, 2, 5, or 10 cycles. 115 00:07:28.490 --> 00:07:32.990 The normal harvest is the same as the initial harvest and allows the flush to 116 00:07:32.990 --> 00:07:35.360 clean the reservoir at the end of this cycle.