Related Manuals for Kold-Draft GT301A
Summary of Contents for Kold-Draft GT301A
- Page 1 ® ELECTROMECHANICAL AND ELECTRONIC ICE CUBER SERVICE MANUAL A Tradition of Excellence In Ice Equipment.
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Page 2: Table Of Contents
Key to Electro-Mechanical Model Numbers Installation Specifications- Electronic Operational Components- Electronic Sequence of Operation- Electronic Electrical Circuits Functional Tests Trouble, Cause and Remedy Service and Troubleshooting Installation and Adjustments Preventative Maintenance Operational Components- Electro-Mechanical Installation Specifications- Electro-Mechanical ® Kold-Draft Service & Parts Manual -1B-... -
Page 3: Key To Electronic Model Numbers 2B
5 = 500 Series (1 HP) 6 = 600 Series (1-1/2 HP) 10 = 1000 Series (2 HP Nominal) 12 = 1200 Series (2 HP Nominal) Cabinet Width GB = Horizontal Unit (42” Wide) GT = Slimline Unit (28-1/2” Wide) Kold-Draft Service & Parts Manual... -
Page 4: Key To Electro-Mechanical Model Numbers 3B
GB = Horizontal Unit, Mounts on a Bin (42” Wide) GT = Slimline Unit, Mounts on a Bin (28-1/2” Wide) GY = Self Contained Compact Unit (30” Wide) GS = Self Contained Compact Unit (24” Wide) IS = Self Contained Dispenser (31-1/4” Wide) Kold-Draft Service & Parts Manual... - Page 5 Installation Specifications 60 Hertz Electronic Cubers FUSE/HACR MINIMUM MINIMUM BREAKER SIZE CIRCUIT INCOMING (AMPS) MODEL AMPACITY WIRE SIZE NORMAL MAXIMUM GT301A 22.7 GT301W GT401A/GB401A 40/35 GT401W/GB401W GT401R/GB401R 20.9 GT402A/GB402A GT402W/GB402W GT402R/GB402R 16.9 GB503A 14.4 GT503W/GB503W 13.3 GT503R/GB503R 12.2 GB603A 11,000 BTU...
- Page 6 Cycle Times (approximate) 26 min. 20 min. 13 min. 28 min. 25 min. 14 min. 28 min. 21 min. 15 min. 3 lbs. 3 lbs. 13 oz. GT301A Refrigerant Charge 10 oz. GT301W Remotes (R) see note below R-12 R-12...
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Page 7: Operational Components- Electronic 6B
Operational Components ® Kold-Draft Electronic Cuber Construction Skins The skins consist of the top, left end, back, right end panels and front inspection panel. Condensing Units Varies with each model. For compressor size and charge, refer to the Water Levels, Pressures, Cycles and Charges Chart on the previous page. - Page 8 1. COLD WATER CONTROL opens the hot gas valve during the fill cycle when the evaporator cools to 45 F. (red L.E.D. shines bright on P.C. card). The hot gas ® Kold-Draft Service & Parts Manual -7B-...
- Page 9 GBR-03177 Probe GBR-03177 Probe & GBR-03240 Extension & GBR-03240 Extension GBR-03177 Probe GBR-03177 Probe & GBR-03240 Extension & GBR-03240 Extension GBR-03177 Probe GBR-03177 Probe GBR-03177 Probe T-100 Crusher ® ® Any Kold-Draft Any Kold-Draft ® Kold-Draft Service & Parts Manual -8B-...
- Page 10 2. Actuator Potentiometer: Adjust to raise water plate 15-30 seconds after ice harvest. 3. Cold Water Potentiometer: Adjustment to open hot gas valve should evaporator cool to 45 F. during water fill cycle. ® Kold-Draft Service & Parts Manual -9B-...
- Page 11 (brown and white) attached to a plug which mates to a plug from the front wire channel. On 115 volt ice makers, the plugs mate white-to-white (brown open on transformer plug). On 208/230 and 115/230 (3 wire) volt ice makers, the plug mate brown-to-brown (white open on transformer plug). ® Kold-Draft Service & Parts Manual -10B-...
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Page 12: Sequence Of Operation- Electronic
When the water plate opens approximately one inch the pump and defrost switch drops, turning the water pump off. The pump switch now completes a second ® Kold-Draft Service & Parts Manual -11B-... - Page 13 When some ice is removed from the bin, the ice maker will start up and refill the bin. ® Kold-Draft Service & Parts Manual -12B-...
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Page 14: Electrical Circuits
Water filling circulation tank and water level probe assembly. Water pump circulating water through water header, distribution laterals and jet holes to individual evaporator cells. Evaporator is cooling water (approximately 2 minutes). ® Kold-Draft Service & Parts Manual -13B-... - Page 15 A red L.E.D. is mounted on the printed circuit card below the cold water control potentiometer as a service aid. It is on (bright) when the cold water control is in the cold position. ® Kold-Draft Service & Parts Manual -14B-...
- Page 16 EEC3: Tank and water level probe assembly full-freeze cycle evaporator above 26 F. - Sufficient water is in the circulation tank and water level probe assembly so that water touches the top thermistor probe and the water valve shuts off. ® Kold-Draft Service & Parts Manual -15B-...
- Page 17 An orange mounted on the printed circuit card below the actuator control potentiometer as L.E.D. is a service aid. It is on (bright) when the actuator control is in the cold position. ® Kold-Draft Service & Parts Manual -16B-...
- Page 18 Cams start rotating counter-clockwise pressing on the cam brackets on the water plate to release it from the (approximately 15 seconds).The open defrost valve allows hot refrigerant gas from the compressor to go through the evaporator coil to start releasing the cubes. ® Kold-Draft Service & Parts Manual -17B-...
- Page 19 The open water valve allows water to begin rinsing off the water plate. Current to the condensing unit, actuator motor, water valve and defrost solenoid (approximately 20 seconds). EEC6: Same as EC6 ® Kold-Draft Service & Parts Manual -18B-...
- Page 20 45 F. (15-30 seconds). The actuator toggle pushed right also completes yellow/orange circuit but with no power in the orange circuit, the actuator motor gets no power during the defrost period. ® Kold-Draft Service & Parts Manual -19B-...
- Page 21 L.E.D. Models with GBB-03135-02-E P.C. cards will turn off the hot gas valve at this time, regardless of the water plate position. Refer to model wiring diagrams for circuit details. ® Kold-Draft Service & Parts Manual -20B-...
- Page 22 Cams continue rotating to upright position (approximately 5 seconds). EEC9: Same as EC9 ® Kold-Draft Service & Parts Manual -21B-...
- Page 23 When ice is removed, bin control relay closes; ice maker will start up and operate regardless of what part of the cycle it was in when it was shut off. ® Kold-Draft Service & Parts Manual -22B-...
- Page 24 (during this check the the control tank tube, it must be a full 11" long to prevent binding between the control tank and the control stream box on the water plate). EEC12: Same as EC12 ® Kold-Draft Service & Parts Manual -23B-...
- Page 25 If the obstruction remains, EC12 and EC13 will repeat. If the obstruction is removed, such as the cube falling out, EC13 will be followed by EC9 and EC10 and normal operation will resume. ® Kold-Draft Service & Parts Manual -24B-...
- Page 26 Submerging the probe in ice water will turn the RED L.E.D. 'ON'. Reaction time is 5-20 seconds. Be sure to return the cold water potentiometer to its original position after the probe tests. ® Kold-Draft Service & Parts Manual -25B-...
- Page 27 5% below that stated returns to normal operation at on nameplate. the end of the defrost cycle. Refrigerant overcharge Reduce the charge Fuse blown one leg of 3-wire Replace fuse. electronic system. ® Kold-Draft Service & Parts Manual -26B-...
- Page 28 Adjust collar so the water plate Collar on lift rod too low, comes up against the cams holding the water plate away while the lift rod holds the from the cams. pump switch up. ® Kold-Draft Service & Parts Manual -27B-...
- Page 29 Pump windings burned out or Allow to cool, or replace motor. off on thermal overload. Check for 115 V., plus or minus Circuit incomplete between Check circuit and switch. water pump and pump-defrost switch. ® Kold-Draft Service & Parts Manual -28B-...
- Page 30 Increase water level if required. Lower water level probe too Adjust water level probe to high. remain immersed in water in control tube least seconds after the control stream starts going over the dam. ® Kold-Draft Service & Parts Manual -29B-...
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Page 31: Trouble, Cause And Remedy
Deformed evaporator cells. Straighten cells with smooth distorted. jaw pliers. Slab does not break up into Fin too thick. Adjust hinges up or evaporator individual cubes. down. Leave 1/32” space between the waterplate and evaporator. ® Kold-Draft Service & Parts Manual -30B-... - Page 32 Control stream will not go over Cracked water plate causing dam at the end of the freeze pressure loss. Repair cycle. replace water plate. Water plates See GB900/GB1000 section. synchronization GB4, GB903, GB1003 or GB1205 cubers. ® Kold-Draft Service & Parts Manual -31B-...
- Page 33 Replace water valve. Water valve stays open more Upper probe covered with Clean cuber with ice machine than 5 seconds after water scale. cleaner. necessary, covers the upper probe tip. remove clean probe carefully. ® Kold-Draft Service & Parts Manual -32B-...
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Page 34: Service And Troubleshooting
Service and Troubleshooting GB900/GB1000/GB1200/GB4 ® These ice makers differ from other Kold-Draft ice makers in that two ice making sections are refrigerated by one condensing unit. GB900/GB1000/GB1200 series are electronic versions of the GB4. The upper ice making section, also known as the "master," contains the controls necessary to operate both sections simultaneously, while the lower or "slave"... - Page 35 The transformer box contains high and low pressure cut-outs, as do all 1 H.P. and ® larger Kold-Draft cubers, and also a high and low cut-out relay. The above diagram illustrates the cut-out circuitry, and shows that compressor current is controlled by a heavy-duty relay rather than the cut-out contacts which are not heavy enough to reliably handle the amperage required of the GB4 compressor.
- Page 36 1/4 p.s.i. to unseat. Hot gas line frost will not occur as long as the inlet pressure in the upper evaporator is equal to or greater than the inlet pressure in the lower evaporator. ® Kold-Draft Service & Parts Manual -35B-...
- Page 37 115 volt power for the water pumps and solenoid valves. Although the refrigeration circuit is identical to the GB4/GB903/GB1003, the compressors in the GB1200 series use R-502 refrigerant along with R-502 expansion valves. ® Kold-Draft Service & Parts Manual -36B-...
- Page 38 4- If the meter goes to the approx. ohm readings listed above and stays there, the capacitor is shorted should be replaced. 5- If the meter doesn’t deflect at all, the capacitor is open and should be replaced. ® Kold-Draft Service & Parts Manual -37B-...
- Page 39 Application of silicone treatment is recommended every three months, or whenever the cuber is serviced, where water conditions cause ice to stick to the water plate. ® Kold-Draft Service & Parts Manual -38B-...
- Page 40 Turn off the power with the water plate down. Wipe the water off the evaporator and water plate surface. Apply Kold-Draft water plate spray to the surface of the water plate except for the last half-inch on the right side. This will keep water from running over the edge and into the ice bin during defrost.
- Page 41 Run the bottom screws through the hinges and into the plate, then tighten the nuts and screws. It may be easier to reach the rear screws if the if the cams are run up to the twelve o’clock position. See the following illustrations. ® Kold-Draft Service & Parts Manual -40B-...
- Page 42 Avoid any twist or kink. The hoses will slide on easier if wet. ® Kold-Draft Service & Parts Manual -41B-...
- Page 43 6. Water plate must be properly aligned with the evaporator. Refer to the alignment information provided. Adjust hinge plates and/or shim evaporator and cam shaft bearing brackets to meet alignment specifications. ® Kold-Draft Service & Parts Manual -42B-...
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Page 44: Installation And Adjustments
Installation and Adjustments Bin Probe Placement-Electronic Cubers Bin Probe Placement-Electro-mechanical Cubers ® Kold-Draft Service & Parts Manual -43B-... - Page 45 Water cooled condensers without end plates can be cleaned by flushing with a condenser cleaning solution. Acid re-circulating pumps and solution are available at refrigeration supply houses. ® Kold-Draft Service & Parts Manual -44B-...
- Page 46 Adjust the high water level probe up to increase the water intake on the next cycle or eliminate the leak. Note: The leak may be internal such as a cracked lateral under the water plate. ® Kold-Draft Service & Parts Manual -45B-...
- Page 47 15-30 seconds after the water flows over the dam, harvest is initiated. Initially the tip of the probe should be set at approximately 1/2” to 3/4” from the bottom of the tube. ® Kold-Draft Service & Parts Manual -46B-...
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Page 48: Preventative Maintenance
GB & GT400, 500 and 600 series: Mix one bag of Kold-Draft ice machine cleaner ® (55R-01000) in (2) quarts, or GS, GY or GT300: Mix 1/2 bag of Kold-Draft machine cleaner (55R-01000) in (1) quart of clean, warm water (180 F. MAX.) for each evaporator/water plate assembly to be cleaned. - Page 49 Extreme care must be used to ensure all the water is blown out. ® Kold-Draft Service & Parts Manual -48B-...
- Page 50 (low water presure, clogged supply line, etc.) or cold inlet water. These conditions could cause the actuator thermostat to change to the cold position before the weight control tank drops. ® Kold-Draft Service & Parts Manual -49B-...
- Page 51 Do not try to adjust the bin thermostat during the water fill portion of the cycle. If the unit shuts off while filling, it may not have sufficient water to form full cubes on the next cycle. However, subsequent cycles will be normal. ® Kold-Draft Service & Parts Manual -50B-...
- Page 52 Turn the weight switch screw 1/8 turn clockwise. See the following illustrations for clarification and component identification. ® Kold-Draft Service & Parts Manual -51B-...
- Page 53 Operational Components Water Level Control Components ® Kold-Draft Service & Parts Manual -52B-...
- Page 54 3 lbs. 3 lbs. Remotes (R) see note below R-12 Refrigerant Type Approximate lbs. of ice per 7-1/2 4-3/4 7-1/2 4-3/4 lbs. lbs. batch 1/2 HP. 3/4 HP. Compressor Size TXV Controlled TXV Controlled ® Kold-Draft Service & Parts Manual -53B-...
- Page 55 NOTE: Remote condenser application cubers require a total minimum charge of 10-1/2 lbs. GB1200 series cubers use R-502, all others use R-12. For maximum fuse size check electrical rating plate on left rear of cuber. ® Kold-Draft Service & Parts Manual -54B-...
- Page 56 KOLD-DRAFT ELECTRO-MECHANICAL ICE CUBER GENERIC SCHEMATIC WIRING DIAGRAM...
- Page 57 KOLD-DRAFT ELECTRONIC ICE CUBER GENERIC SCHEMATIC WIRING DIAGRAM...
- Page 58 KOLD-DRAFT ELECTRO-MECHANICAL ICE CUBER GENERIC SCHEMATIC WIRING DIAGRAM...
- Page 74 KOLD-DRAFT ELECTRONIC ICE CUBER GENERIC SCHEMATIC WIRING DIAGRAM...
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Page 85: Kold-Draft
KOLD-DRAFT 101 Corporate Woods Parkway Vernon Hills, IL 60061 847-215-4500 800-726-8762 FAX: 8 47-541-1759 www.kold-draft.com...