True TWT-67F - User Manual

This document serves as an installation and operation manual for True Food Service Equipment's undercounter and worktop freezers, designed to provide years of trouble-free commercial refrigeration. It emphasizes proper installation, maintenance, and safe operation to ensure optimal performance and longevity of the unit.

Function Description

These True undercounter and worktop freezers are commercial refrigeration units designed to maintain specific temperatures for food storage. They are available in various models, including those with solid doors and glass doors, and can be configured with either mechanical or electronic temperature controls. The primary function is to cool and preserve food products, with freezer models capable of reaching temperatures around -10°F (-23°C) and refrigerator models around 35°F (1.7°C). The units feature a compressor-driven refrigeration system, evaporator fans, and, in freezer applications, defrost heaters to prevent frost buildup on the evaporator coil. Some models also incorporate a reversing condenser fan motor for self-cleaning of the condensing coil.

Usage Features

The freezers are designed for ease of use and efficient operation in a commercial kitchen environment.

Installation and Setup: The manual provides detailed instructions for uncrating the unit, which involves removing outer packaging and carefully lifting the cabinet off its wooden skid. It highlights the importance of proper electrical connection, emphasizing the use of a dedicated electrical circuit with a voltage rating matching the unit's data plate. The manual strictly warns against using extension cords or adapter plugs due to potential safety hazards and warranty voidance. Leveling the unit is crucial for effective condensate removal and proper door operation, with instructions for installing castors or optional legs and using leveling shims on uneven floors.
Shelving: Shelf installation is straightforward, involving hooking shelf clips onto shelf standards and ensuring shelves are properly seated with cross support bars facing down. The manual advises against using pliers or crimping tools when installing shelf clips to avoid instability.
Drawers: Depending on the model, drawers can be removed and installed using one of two methods. Drawer Set 1 involves rotating roller clips upward to lift the drawer from its channel, while Drawer Set 2 requires pushing and disengaging a white drawer retainer.
Startup: After installation, the unit should be plugged in. It is recommended to allow the unit to run empty for two to three days to confirm correct electrical wiring, installation, and absence of shipping damage before loading product. If the unit is disconnected or shut off, a five-minute wait is advised before restarting.
Temperature Control: Units come factory-set to approximate temperatures (35°F for refrigerators, -10°F for freezers). The manual details how to adjust both mechanical and electronic temperature controls.
- Mechanical Controls: These are typically located inside the unit. Adjustments involve turning a calibration screw, with each 1/4 turn equating to approximately 2°F. The manual provides an altitude correction table for high-altitude adjustments. Defrost timers for mechanical controls are factory-set for three defrost periods per day (6:00 a.m., 2:00 p.m., and 10:00 p.m.), each lasting 30 minutes. Users can customize these settings by flipping white tabs on the timer dial.
- Electronic Controls (LAE): These controls feature a digital display and are often located on the rear of the unit or behind an access grill. They offer more advanced features, including preprogrammed time delays for compressor and fan startup, and condenser fan reversal for coil cleaning. The LAE control cycles the compressor and evaporator fans based on a Set-Point and Differential temperature. The manual explains how to lock and unlock the controller to prevent unauthorized changes, turn the control on/off, change the display readout from Fahrenheit to Celsius, initiate a manual defrost, and adjust defrost intervals. It also provides a list of display codes for diagnosing potential issues.
Airflow: Good airflow within the unit is critical. Users are advised to load product carefully, ensuring it does not press against the back wall or come within four inches of the evaporator housing to allow proper circulation of refrigerated air.
Lighting: Glass door models typically have interior lights controlled by a switch located inside the unit, often above the door or on the ceiling. Solid door models may have lights controlled by a door switch.

Maintenance Features

Regular maintenance is crucial for the efficient and trouble-free operation of True freezers, and the manual provides comprehensive guidelines.

Condenser Coil Cleaning: This is highlighted as a critical maintenance task, recommended every 30 days or as needed. Dirty condensers can lead to compressor failure, product loss, and increased electrical costs, none of which are covered by warranty. The cleaning process involves disconnecting power, removing the louvered grill, sliding out the compressor assembly, and cleaning accumulated dirt from the finned condenser coil with a stiff bristle brush, vacuum, or compressed air. Eye protection is strongly recommended when using compressed air. After cleaning, the compressor assembly and grill must be reinstalled, and power reconnected.
Stainless Steel Care: The manual provides detailed instructions for maintaining the stainless steel surfaces of the unit. It warns against using steel wool, abrasive materials, or chlorine-based products, which can damage the passive layer and lead to corrosion. Key recommendations include:
- Using non-abrasive cleaning tools and soft cloths.
- Cleaning along the polish lines or "grain" of the stainless steel.
- Using alkaline, alkaline chlorinated, or non-chloride containing cleaners.
- Treating hard water to reduce deposits.
- Maintaining cleanliness by frequent cleaning and avoiding the buildup of hard stains.
- Rinsing and wiping dry immediately after using chlorinated cleaners, allowing the stainless steel to air dry to help maintain the passivity film.
- Strictly avoiding hydrochloric acid (muriatic acid).
- Regularly restoring/passivating stainless steel.
Warranty Information: The manual outlines the three-year parts and labor warranty and an additional two-year compressor warranty, applicable to units shipped after July 1, 2014. It specifies what is covered and, importantly, what is not covered, such as standard wear parts (door gaskets, bulbs), issues from improper installation or lack of basic preventative maintenance (like condenser coil cleaning), consequential damages, economic losses, and damages from improper usage, alteration, neglect, abuse, or incorrect electrical connections. The warranty is non-transferable and applies only to units sold and used within the U.S. and Canada.

True TWT-67F Specifications

General

Number of Doors	2
Temperature	-10°F
Voltage	115/60/1
Number of Shelves	4
Defrosting System	Automatic
Color	Stainless Steel
Dimensions (HxWxD)	850 x 595 x 625 mm
Refrigerant	R290 Hydrocarbon