NOVA™ ICE CREAM HARDENING AND HOLDING CABINETS Models NX201WWW/0, NX201WWW/4 & NX362WWW/4 Installation, Operations and Maintenance Instructions 151555 Rev.
TABLE OF CONTENTS INTRODUCTION STORE CONDITIONS WARNING LABELS AND SAFETY INSTRUCTIONS PRE-INSTALLATION INSTRUCTIONS Inspection for Shipping Damage INSTALLATION INSTRUCTIONS General Instructions Mechanical Electrical Leg and Condensate Pan Installation SERVICE INSTRUCTIONS TEMPERATURE SENSOR, DEFROST HEATER AND FAN MOTOR REPLACEMENT ELECTRONIC REFRIGERATION CONTROL SENSOR PROBE FINAL CHECK LIST PART NUMBERS ACCESSORIES SALE AND DISPOSAL WIRING DIAGRAM - NX201WWW/0 WIRING DIAGRAM - NX201WWW/4 WIRING DIAGRAM
INTRODUCTION This manual contains important instructions for installing, using, and servicing your Hardening and Holding Cabinet case. A parts list is included with this manual. Read all these documents carefully before installing or servicing your equipment. STORE CONDITIONS The Hardening and Holding Cabinet cases are designed to operate in the controlled environment of an air-conditioned store. The store temperature should be at or below 75°F and a relative humidity of 55% or less.
WARNING LABELS AND SAFETY INSTRUCTIONS This symbol is the safety-alert symbol. When you see this symbol on your cabinet or in this manual, be alert to the potential for personal injury or damage to your equipment. Be sure you understand all safety messages and always follow recommended precautions and safe operating practices. NOTICE TO EMPLOYERS You must make sure that everyone who installs, uses or services your cabinet is thoroughly familiar with all safety information and procedures.
PRE-INSTALLATION INSTRUCTIONS INSPECTION FOR SHIPPING DAMAGE You are responsible for filing all freight claims with the delivering truck line. Inspect all cartons and crates for damage as soon as they arrive. If damage is noted to shipping crates or cartons or if a shortage is found, note this on the bill of lading (all copies) prior to signing.
MECHANICAL Remove front grille and check refrigeration lines to see that they are free (not touching each other or compressor). Spin condenser fan blade to see that it is free. Check for electrical wires that may have moved during shipping. Remove cabinet from crate base and slide into location. Cabinet must be level from side to side and front to back for correct draining of coil pan and for self-closing doors to operate correctly.
LOW TEMPERATURE FREEZERS – “NX201WWW” Models The Hardening and Holding Cabinet has a power cord in the bottom of the cabinet at the right rear for connection to power. On initial start-up the evaporator fan motors will not start and you cannot initiate a defrost until the evaporator coil temperature has lowered to 35°F. This is due to the thermostat. Also, the cabinet comes with a non-adjustable “Front” control to keep the mullion heaters off until the cabinet temperature has lowered to 10°F.
TEMPERATURE SENSOR, DEFROST HEATER AND FAN MOTOR REPLACEMENT Before making any change, technician should: 1. Disconnect power to the cabinet 2. Remove screws from venturi and pull down To change a temperature sensor (cabinet zone sensor or defrost termination sensor), simply disconnect the sensor wires from the controller and replace the new sensor in the original position. Use plastic tie to tighten the zone sensor.
ELECTRONIC REFRIGERATION CONTROL D sp ay Lay ou Compressor When power is first turned on to the control, the controller will go through the start-up delay. After a one- minute delay, the compressor comes on. The LED for cooling indicator stays on while compressor relay is energized. Display will show actual box temperature. Picture above is the display layout. The compressor will be cycled off when the actual box temperature reaches its set point. The cooling indicator will be off.
MANUAL DEFROST Defrosting my also be induced manually by keeping the defrost button for 3 seconds. Once defrost has started, the defrost will go through a defrost and drip time pull down cycle. HOW TO CHANGE THE SETPOINT HOW TO CHANGE A PARAMETER VALUE NOTE 1: The set value is stored even when the procedure is exited by waiting the time-out to expire. NOTE 2: The SETPOINT is set at a recommended –20°F at the factory. NOTE 3: To scroll down the parameters without changing them, press the DOWN button.
PROBE CONNECTIONS The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid infiltration. It is recommended to place the thermostat probe away from air streams at return air for correct measure the average room temperature. Place the defrost termination probe among the evaporator fins in the coldest place, where most ice is formed, far from heaters or from the warmest place during defrost, to prevent premature defrost termination.
FINAL CHECK LIST A. B. C. D. E. F. G. H. I. Check operating pressures. Check electrical requirements of unit to supply voltage. Set temperature control for desired temperature range. Check sight glass (if applicable) for proper refrigerant charge. Check system for proper defrost settings and operation. Check condensing unit for vibrating or rubbing tubing. Dampen and clamp as required. All valves should be completely opened counter-clockwise. Check packing nuts on all service valves.
PARTS LIST The table below gives Factory’s numbers. Use this chart when ordering replacement parts for your Hardening Cabinets. Always advise Cabinet Serial Number when ordering parts.
151555 Rev.
151555 Rev.
151555 Rev.
