Norlake ZR112 Installation Manual

DAIRY QUEEN

BLIZZARD STATION™

Installation, Operation and

Maintenance Instructions

INSPECTION

When the equipment is received, all items should be carefully checked against the bill of lading to insure all crates and cartons have been received. All units should be inspected for concealed damage by uncrating the units immediately. If any damage is found, it should be reported to the carrier at once, and a claim should be filed with the carrier. This equipment has been inspected and tested in the Nor-Lake Manufacturing Facility and has been crated in accordance with transportation rules and guidelines. Manufacturer is not responsible for freight loss or damage.

INSTALLATION

GENERAL

After the unit crate and crate base have been removed, locate the casters found inside the cabinet. Attach the casters to the base of the unit by screwing them into the same threaded fittings that were used to secure the crate base to the cabinet. Insure that the casters are screwed all the way into the base.

LOCATION

The refrigeration system of the cabinet requires free air access for proper operation. Bumpers have been attached to the back of the cabinet to allow for the appropriate clearance from a wall. Once the cabinet is placed in its permanent location it should be leveled from side to side and front to back. Fresh water and drain connections must be made in accordance with Federal, State, and Local code requirements.

Physical Specifications

Unit Exterior Dimensions Refrigerant

Model Width x Depth x Height

ZR112 54" x 32" x 44-3/4" See Serial Tag

ELECTRICAL

Check the proposed outlet to be used to insure that the voltage, phase, and current carrying capacity of the circuit from the electrical panel correspond to the requirements of the cabinet. Never use an extension cord to run power to the unit. Refer to the serial tag for all pertinent electrical information.

Observe all Warning Labels. Disconnect power supply to eliminate electrical shock and injury from moving parts when servicing equipment.

Type/Amount

Electrical Data

Unit Type of

Model Connection

ZR112 Cord 115/60/1

Volt/Hz/Ph

OPERATION

The Blizzard Merchandising Cabinet employs a cold wall evaporator located inside the topping rail. During the refrigeration process, heat is removed through the evaporator tubing and expelled through the condensing unit. In order to assure proper airflow, make certain the flow of air behind the cabinet and through the front louver is not restricted.

The refrigeration system on this cabinet uses a temperature thermostat that senses the cut-in and cut-out temperatures of the cold wall evaporator coil. The topping rail temperature can be adjusted by turning the thermostat control knob that is located on the inside of the cabinet on the condenser cover.

MAINTENANCE

PERIODIC CLEANING

Beginning with the initial installation, the interior surfaces of the cabinet and topping well should be periodically wiped down with a solution of warm water and baking soda. This solution will remove any odors that may occur as a result of spillage. The exterior of the cabinet should also be cleaned frequently with a commercial grade of glass cleaner. The plastic "safe edging" material should be removed periodically and cleaned in a sink with soap and water, dried, and replaced on the unit. Caution: Do not use any abrasive or alkaline solutions to clean the cabinet.

Important: Monthly cleaning of the condenser coil will aid the heat transfer characteristics of the refrigeration system and keep it operating at top efficiency. The condenser coil is located inside the cabinet and can be accessed by removing the condenser cover. The condenser cover has a label identifying it and reminding the user to clean the condenser coil monthly. Failure to keep the condenser coil clean could result in temperature loss and damage to the compressor.

Disconnect the power before cleaning the condenser coil to prevent injury. Remove the condenser cover and use a soft brush to loosen the lint and dirt attached to the fins. After this has been accomplished, use a vacuum cleaner to remove the loosened particles.

All moving parts have been permanently lubricated and will generally require no maintenance.

SERVICE

Any correspondence pertaining to this cabinet should be directed to the Service Department of Nor-Lake, Incorporated. Be sure to include the cabinet model number and

serial number with any correspondence.

800-388-5253 Parts/Service

Nor-Lake, Incorporated 800-388-5253 Parts/Service 727 Second Street 800-955-5253 Sales P.O. Box 248 715-386-2323 Hudson, Wisconsin 54016 715-386-6149 FAX

MAINTENANCE SERVICE AND ANALYSIS GUIDE

REFRIGERATION SYSTEMS - ALL MODELS

MALFUNCTION POSSIBLE CAUSE

Compressor will not start - 1. Service cord unplugged 1. Plug in service cord no hum 2. Fuse blown or removed 2. Replace fuse

3. Overload tripped 3. Determine reasons and correct

4. Control stuck open 4. Repair or replace

5. Wiring incorrect 5. Check wiring against the diagram

Compressor will not start - 1. Improperly wired 1. Check wiring against the diagram hums but trips on overload 2. Low voltage to unit 2. Determine reason and correct protector 3. Starting capacitor defective 3. Determine reason and replace

4. Relay failing to close 4. Determine reason, correct or replace

Compressor starts and runs, 1. Low voltage to unit 1. Determine reason and correct but short cycles on overload 2. Overload defective 2. Check current, replace overload protector protector 3. Excessive head pressure 3. Check ventilation or restriction in

refrigeration system

4. Compressor hot-return gas hot 4. Check refrigerant charge, fix leak if

Compressor operates long 1. Short of refrigerant 1. Fix leak, add refrigerant or continuously 2. Control contact stuck 2. Repair or replace

3. Evaporator coil iced 3. Determine cause, defrost manually

4. Restriction in refrigeration 4. Determine location and remove restriction system

5. Dirty condenser 5. Clean condenser

Compressor runs fine, but 1. Overload protector 1. Check wiring diagram short cycles 2. Cold control 2. Differential too close - widen

3. Overcharge 3. Reduce charge

4. Air in system 4. Purge and recharge

5. Undercharge 5. Fix leak, add refrigerant

SOLUTION

necessary

Starting capacitor open, 1. Relay contacts stuck 1. Clean contacts or replace relay shorted or blown 2. Low voltage to unit 2. Determine reason and correct

Relay defective or burned out 1. Incorrect relay 1. Check and replace

Refrigerated space too warm 1. Control setting too high 1. Reset control

Standard temperature system 1. Control setting is too low 1. Reset the control freezes the product 2. Control points stuck 2. Replace the control

Objectionable noise 1. Fan blade hitting fan shroud 1. Reform or cut away small section of shroud

Pan Area 1. No cooling 1. Make sure switch is in the "on" position

3. Improper relay 3. Replace

2. Voltage too high or too low 2. Determine reason and correct

2. Refrigerant overcharge 2. Purge refrigerant

3. Dirty condenser 3. Clean condenser

4. Evaporator coil iced 4. Determine reason and defrost

5. Not operating 5. Determine reason, replace if necessary

2. Tubing rattle 2. Locate and reform

3. Vibrating fan blade 3. Replace fan blade

4. Condenser fan motor rattles 4. Check motor bracket mounting, tighten

5. General vibration 5. Compressor suspension bolts not loosened

on applicable models - loosen them

6. Worn fan motor bearings 6. Replace fan motor

2. Too cold 2. Adjust temperature control - see instructions

under pan area

3. Too warm 3. Adjust temperature control - see instructions

under pan area

Nor-Lake, Inc. • PO Box 248 • Hudson, WI 54016 • 800-388-5253 Service • 715-386-2323 Sales • 715-386-6149 FAX

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