1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your So-Low CH45-5 Lab Chest Freezer. Please read this manual thoroughly before operating the unit and retain it for future reference.
The So-Low CH45-5 is a 5 cubic foot lab chest freezer designed for precise temperature control, ranging from 0°C to -45°C. It features a microprocessor digital controller, dual display for actual and set-point temperatures, and a comprehensive alarm system with battery backup to ensure sample integrity.
2. Setup and Installation
2.1 Unpacking
Carefully remove the freezer from its packaging. Inspect the unit for any shipping damage. Report any damage to the carrier immediately. Retain all packaging materials until the unit has been inspected and tested.
2.2 Placement
Place the freezer on a level, stable surface capable of supporting its weight (approximately 150 pounds when empty). Ensure adequate clearance around the unit for proper ventilation. Avoid placing the freezer in direct sunlight or near heat-generating equipment.
2.3 Electrical Requirements
The So-Low CH45-5 Lab Chest Freezer operates on 115V. A 15 amp dedicated line is required for optimal performance and safety. Do not use extension cords or adapter plugs. Ensure the power outlet is properly grounded.
2.4 Initial Cleaning
Before first use, clean the interior of the freezer with a mild detergent and water. Rinse thoroughly and dry completely. Do not use abrasive cleaners or solvents.
An image showing the So-Low CH45-5 Lab Chest Freezer. The freezer is white, rectangular, and has its top-opening lid raised, revealing the interior. It is equipped with casters for mobility and a control panel visible on the lower right side.
3. Operating Instructions
3.1 Power On
Once the freezer is properly installed and connected to the dedicated power line, turn on the main power switch, typically located near the power cord inlet.
3.2 Temperature Control
The freezer is equipped with a microprocessor digital controller featuring a dual display. One display shows the actual internal temperature, while the other shows the set-point temperature. Refer to the control panel instructions on the unit for specific button functions to adjust the set-point temperature. Allow several hours for the freezer to reach the desired temperature after initial power-on or temperature adjustment.
3.3 Alarm System
The unit includes a battery-operated alarm system that emits an audible and visual signal in case of mechanical or electrical failure, or if the temperature deviates from the set range. Familiarize yourself with the alarm indicators and silencing procedures outlined on the control panel or in the full product documentation.
3.4 Loading the Freezer
Distribute contents evenly inside the freezer. Avoid blocking the internal air circulation. Do not overload the unit, as this can impair cooling efficiency.
4. Maintenance
4.1 Cleaning
Regularly clean the interior and exterior surfaces of the freezer. Use a soft cloth with mild soap and water. For the interior, ensure the unit is unplugged and defrosted if necessary. Wipe dry thoroughly before reconnecting power.
4.2 Defrosting
Frost buildup inside the freezer can reduce efficiency. Defrost the unit when frost accumulation reaches approximately 1/4 inch (6 mm) thickness. To defrost, unplug the unit, remove all contents, and allow the frost to melt naturally. Use a soft cloth to absorb water. Do not use sharp objects to remove ice.
4.3 Condenser Coil Cleaning
Periodically clean the condenser coils, typically located at the back or bottom of the unit, to ensure efficient operation. Use a vacuum cleaner or brush to remove dust and debris. Ensure the unit is unplugged before cleaning the coils.
5. Troubleshooting
This section provides solutions to common issues. For problems not listed here, or if issues persist, contact qualified service personnel.
- Freezer not cooling: Check if the unit is plugged in, the power switch is on, and the circuit breaker has not tripped. Ensure the temperature setting is correct.
- Temperature too high/low: Verify the set-point temperature. Ensure the door is sealing properly and not left open for extended periods. Check for excessive frost buildup.
- Alarm sounding: Identify the specific alarm code or indicator on the control panel. Common alarms include high/low temperature, power failure, or sensor error. Address the underlying cause or consult the full manual for alarm code explanations.
- Excessive noise: Ensure the freezer is level. Check for any objects vibrating against the unit. If the noise is from the compressor, it may be normal operation, but unusual or loud noises should be investigated.
6. Specifications
| Feature | Specification |
|---|---|
| Brand | So-Low |
| Model Name | CH45-5 Lab Chest Freezer |
| Item Model Number | CH45-5 |
| Capacity | 5 Cubic Feet |
| Temperature Range | 0°C to -45°C |
| Voltage | 115V |
| Item Weight | 150 Pounds |
| Color | White |
| Door Orientation | Top |
| Refrigeration System | Single Stage |
7. Warranty and Support
For information regarding product warranty, technical support, or service, please refer to the documentation included with your purchase or contact So-Low customer service directly. Contact details are typically available on the manufacturer's official website or on the product's packaging.
