Manitowoc Undercounter Maintenance

Maintenance
Interior Cleaning and Sanitizing
Clean and sanitize the ice machine every six months for efficient operation. If the ice machine requires more frequent cleaning and sanitizing, consult a qualified service company to test the water quality and recommend appropriate water treatment.
The ice machine must be taken apart for cleaning and sanitizing. Use only Manitowoc approved Ice Machine Cleaner (part number 94-0546-3) and Sanitizer (part number 94-0565-3). It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling. Read and understand all labels printed on bottles before use.
CLEANING AND SANITIZING PROCEDURE
Do not mix Ice Machine Cleaner and Sanitizer solutions together. It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling.
Wear rubber gloves and safety goggles (and/or face shield) when handling Ice Machine Cleaner or Sanitizer. Ice machine cleaner is used to remove lime scale and mineral deposits. Ice machine sanitizer disinfects and removes algae and slime.
Step 1: Set the toggle switch to the OFF position after ice falls from the evaporator at the end of a Harvest cycle. Or, set the switch to the OFF position and allow the ice to melt off the evaporator.
Never use anything to force ice from the evaporator. Damage may result. Step 2: Remove all ice from the bin. Step 3: To start a cleaning cycle, move the toggle switch to the WASH position. Step 4 Add the proper amount of Manitowoc Ice Machine Cleaner to the water trough. Step 5 Wait until the clean cycle is complete (approximately 22 minutes) then place the toggle switch in the OFF position, disconnect power and water supplies to the ice machine.
Disconnect electric power to the ice machine at the electric switch box before proceeding. Step 6: Remove parts for cleaning.
A. Remove the Vinyl Hose • Disconnect the water hose from the distribution tube and water pump.
B. Remove Water Pump • Disconnect the water pump power cord Water Pump Removal • Loosen the screws securing the pump-mounting bracket to the bulkhead. • Lift the pump and bracket assembly off the mounting screws. C. Remove the Ice Thickness Probe • Compress the side of the ice thickness probe near the top hinge pin and remove it from the bracket.
SV1138A DO NOT SOAK WATER PUMP MOTOR IN CLEANER OR SANITIZER SOLUTIONS
Ice Thickness Probe Removal
NOTE: At this point, the ice thickness probe can easily be cleaned. If complete removal is desired follow the ice thickness probe wire to the bulkhead grommet (exit point) in the back wall. Pop the bulkhead grommet out of the back wall by inserting fingernails or a flat object between the back wall and the grommet and prying forward. Pull the bulkhead grommet and wire forward until the connector is accessible, then disconnect the wire lead from the connector.
Ice Thickness Probe Cleaning • Mix a solution of Manitowoc ice machine cleaner and water (2 ounces of cleaner to 16 ounces of water) in a container. • Soak the ice thickness probe a minimum of 10 minutes. Clean all ice thickness probe surfaces and verify the ice thickness probe cavity is clean. Rinse thoroughly with clean water, then dry completely. Incomplete rinsing and drying of the ice thickness probe can cause premature harvest.
Water Distribution Tube Removal
• Loosen the two thumbscrews, which secure the distribution tube. • Lift the right side of the distribution tube up off the locating pin, then slide it back and to the right.
Do not force this removal. Be sure the locating pin is clear of the hole before sliding the distribution tube out. Disassembly
• Twist both of the inner tube ends until the tabs line up with the keyways. • Pull the inner tube ends outward.
Water Distribution Tube Disassembly
Q130 Models
1. LIFT UP 2. SLIDE BACK 3. SLIDE TO RIGHT THUMBSCREW DISTRIBUTION TUBE THUMBSCREW1 2 3 SV127 LOCATING PIN
Water Distribution Tube Removal
• Loosen the two thumbscrews, which secure the distribution tube. • Lift the distribution tube up off the thumbscrews. Disassembly • Twist the barbed end until the tab lines up with the keyway. • Pull the inner tube end outward.
E. Remove the Float Valve • Turn the splash shield counterclockwise one or two turns. Float Valve Removal
• Pull the float valve forward and off the mounting bracket. • Disconnect the water inlet tube from the float valve at the compression fitting. • Remove the cap and filter screen for cleaning. F. Remove the Water Trough • Apply downward pressure on the siphon tube and remove from the bottom of the water trough. • Remove the upper thumbscrew.
• While supporting the water trough remove the two thumbscrews from beneath the water trough. • Remove the water trough from the bin area
SPLASH SHIELDFLOAT SHUT-OFF VALVE COMPRESSION FITTING FLOAT VALVE BRACKET
CAP AND FILTER SCREEN
G. Remove the Ice Damper • Grasp left side of ice damper and apply pressure against the right-hand ice damper mounting bracket. • Pull forward on the ice damper until the left-hand mounting pin disengages. Installation • Grasp the right side of ice damper and place left hand pin in the mounting bracket. • While applying pressure against the left-hand mounting bracket push the damper until the right-hand mounting pin engages. • Grasp ice damper and apply pressure toward the left hand mounting bracket. • Apply pressure to the right hand mounting bracket with thumb. • Pull ice damper forward when the right hand ice damper pin disengages. • Place ice damper pin in left hand mounting bracket and apply pressure toward the left hand mounting bracket. • Apply pressure to the right hand mounting bracket with thumb. • Push ice damper toward evaporator until right hand damper pin engages. H. Remove the Bin Door • Grasp the rear of the bin door and pull bin door forward approximately 5”.
• Slide bin door to the rear while applying upward pressure (The rear door pins will ride up into the track slot and slide backward to the stop tab). • While applying pressure against the bin door pull down on the rear of each bin door track until the door pins clear the stop tabs. • Slide the rear door pins off the end and then below the door track. Slide bin door forward allowing the back of the door to lower into the bin. Continue forward with the bin door until the front pins bottom out in the track. • Lift right side of door until the front pins clear the track, then remove door from bin. Step 7 Mix a solution of cleaner and warm water. Depending on the amount of mineral buildup, a larger quantity of solution may be required. Use the ratio in the table below to mix enough solution to thoroughly clean all parts. Step 8 Use ½ of the cleaner/water solution to clean all components. The cleaner solution will foam when it contacts lime scale and mineral deposits; once the foaming stops use a soft bristle brush, sponge or cloth (not a wire brush) to carefully clean the parts. Soak the parts for 5 minutes (15 – 20 minutes for heavily scaled parts). Rinse all components with clean water. Step 9 While components are soaking, use ½ of the cleaner/water solution to clean all foodzone surfaces of the ice machine and bin. Use a nylon brush or cloth to thoroughly clean the following ice machine areas: • Evaporator plastic parts – including top, bottom and sides • Bin bottom, sides and top Rinse all areas thoroughly with clean water. Step 10 Mix a solution of sanitizer and warm water. Step 11 Use 1/2 of the sanitizer/water solution to sanitize all removed components. Use a cloth or sponge to liberally apply the solution to all surfaces of the removed parts or soak the removed parts in the sanitizer/water solution. Do not rinse parts after sanitizing.
Section 4 Maintenance Step 12 Use 1/2 of the sanitizer/water solution to sanitize all foodzone surfaces of the ice machine and bin. Use a cloth or sponge to liberally apply the solution. When sanitizing, pay particular attention to the following areas:
• Evaporator plastic parts - including top, bottom and sides • Bin bottom, sides and top Do not rinse the sanitized areas.
Step 13 Replace all removed components. Step 14 Reapply power and water to the ice machine and place the toggle switch in the WASH position. Step 15 Add the proper amount of Manitowoc Ice Machine Sanitizer to the water trough.
Step16 Wait until the sanitize cycle is complete (approximately 22 minutes) then place the toggle switch in the OFF position, disconnect power and water supplies to the ice machine. Disconnect electric power to the ice machine at the electric switch box before proceeding. Step 17 Repeat step 6 to remove parts for hand sanitizing.Step 18 Mix a solution of sanitizer and warm water. Step 19 Use 1/2 of the sanitizer/water solution to sanitize all removed components. Use a cloth or sponge to liberally apply the solution to all surfaces of the removed parts or soak the removed parts in the sanitizer/water solution. Do not rinse parts after sanitizing. Step 20 Use 1/2 of the sanitizer/water solution to sanitize all foodzone surfaces of the ice machine and bin. Use a cloth or sponge to liberally apply the solution. When sanitizing, pay particular attention to the following areas:
• Evaporator plastic parts - including top, bottom and sides • Bin bottom, sides and top Do not rinse the sanitized areas.
Step 21 Replace all removed components. Step 22 Reapply power and water to the ice machine and place the toggle switch in the ICE position.
ICE MACHINE INSPECTION
Check all water fittings and lines for leaks. Also, make sure the refrigeration tubing is not rubbing or vibrating against other tubing, panels, etc. Do not put anything (boxes, etc.) in front of the ice machine. There must be adequate airflow through and around the ice machine to maximize ice production and ensure long component life.
EXTERIOR CLEANING
Clean the area around the ice machine as often as necessary to maintain cleanliness and efficient operation. Sponge any dust and dirt off the outside of the ice machine with mild soap and water. Wipe dry with a clean, soft cloth. A commercial grade stainless steel cleaner/polish can be used as necessary.
CLEANING THE CONDENSER
Disconnect electric power to the ice machine at the electric service switch before cleaning the condenser. Air-Cooled Condenser A dirty condenser restricts airflow, resulting in excessively high operating temperatures. This reduces ice production and shortens component life. Clean the condenser at least every six months. Follow the steps below.
The condenser fins are sharp. Use care when cleaning them. 1. The washable aluminum filter on self-contained ice machines is designed to catch dust, dirt, lint and grease. This helps keep the condenser clean. Clean the filter with a mild soap and water solution. 2. Clean the outside of the condenser with a soft brush or a vacuum with a brush attachment. Clean from top to bottom, not side to side. Be careful not to bend the condenser fins. 3. Shine a flashlight through the condenser to check for dirt between the fins. If dirt remains: Blow compressed air through the condenser fins from the inside. Be careful not to bend the fan blades. 4. Use a commercial condenser coil cleaner. Follow the directions and cautions supplied with the cleaner. 5. Straighten any bent condenser fins with a fin comb. 6. Carefully wipe off the fan blades and motor with a soft cloth. Do not bend the fan blades. If the fan blades are excessively dirty, wash with warm, soapy water and rinse thoroughly
If you are cleaning the condenser fan blades with water, cover the fan motor to prevent water damage. Water-Cooled Condenser and Water Regulating Valve The water-cooled condenser and water regulating valve may require cleaning due to scale build-up. Low ice production, high water consumption and high operating temperatures and pressures all may be symptoms of restrictions in the condenser water circuit. Because the cleaning procedures require special pumps and cleaning solutions, they must be performed by qualified maintenance or service personnel.
REMOVAL FROM SERVICE WINTERIZATION
Special precautions must be taken if the ice machine is to be removed from service for an extended period of time or exposed to ambient temperatures of 32°F (0°C) or below.
If water is allowed to remain in the ice machine in freezing temperatures, severe damage to some components could result. Damage of this nature is not covered by the warranty. Follow the applicable procedure below.
SELF-CONTAINED AIR-COOLED ICE MACHINES
1. Disconnect the electric power at the circuit breaker or the electric service switch. 2. Turn off the water supply.
3. Remove the water from the water trough. 4. Disconnect and drain the incoming ice-making water line at the rear of the ice machine. 5. Blow compressed air in both the incoming water and the drain openings in the rear of the ice machine until no more water comes out of the inlet water lines or the drain. 6. Make sure water is not trapped in any of the water lines, drain lines, distribution tubes, etc.
WATER-COOLED ICE MACHINES
Perform steps 1-6 under “Self-Contained Air-Cooled Ice Machines.” 1. Disconnect the incoming water and drain lines from the water-cooled condenser. 2. Insert a large screwdriver between the bottom spring coils of the water regulating valve. Pry upward to open the valve. Pry Open the Water Regulating Valve 3. Hold the valve open and blow compressed air through the condenser until no water remains.