Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of the Ranco K50Q-1127-001 Refrigerator Cold Control. This device is designed to regulate the temperature within refrigeration units, maintaining a range between 34°F and 55°F. Please read these instructions thoroughly before proceeding with installation or operation.
Safety Information
WARNING: Risk of Electric Shock. Disconnect power before installation or servicing.
- Always ensure the main power supply to the refrigeration unit is disconnected before attempting any installation, wiring, or maintenance procedures.
- Installation and wiring should only be performed by a qualified technician in accordance with all local and national electrical codes.
- Do not operate the control with damaged wiring or if the unit appears to be faulty.
- Keep the control unit dry and away from moisture.
Product Overview
The Ranco K50Q-1127-001 is a single-pole, single-throw (SPST) refrigeration control featuring a capillary tube for temperature sensing. It includes a control knob, faceplate, and mounting hardware for installation.
Figure 1: Ranco K50Q-1127-001 Cold Control unit with its coiled capillary tube.
Figure 2: Included accessories: faceplate, mounting bracket, screws, wire connectors, and control knob.
Setup and Installation
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1. Disconnect Power:
Before beginning any work, ensure the refrigeration unit is completely disconnected from its power source.
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2. Remove Old Control (if applicable):
Carefully remove the existing cold control, noting the wiring connections and the placement of the capillary tube. Take photographs for reference if necessary.
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3. Mount the New Control:
Use the provided mounting hardware and bracket to secure the Ranco K50Q-1127-001 control unit in the designated location. Ensure it is firmly attached.
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4. Wiring Connections:
Connect the electrical wires to the terminals on the new control. Refer to the wiring diagram of your specific refrigeration unit for correct connections. The control features SPST contacts. Ensure all connections are secure and insulated.
Figure 3: Electrical terminals for wiring connections.
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5. Capillary Tube Placement:
The capillary tube is 47 1/4 inches long and is crucial for accurate temperature sensing. Carefully route the capillary tube to the area where temperature needs to be controlled. Avoid kinking or sharply bending the tube, as this can damage it and impair its function. The tip of the capillary tube should be securely fastened in the coldest part of the refrigerated compartment, typically near the evaporator coil, without touching it directly.
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6. Install Faceplate and Knob:
Attach the provided faceplate and control knob. Ensure the knob aligns correctly with the control shaft and the temperature markings on the faceplate.
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7. Restore Power:
Once all connections are secure and the unit is properly mounted, restore power to the refrigeration unit.
Operating Instructions
The Ranco K50Q-1127-001 cold control allows for temperature adjustment within a range of 34°F to 55°F.
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1. Initial Setting:
Upon initial power-up, set the control knob to a mid-range setting (e.g., '4' or '5' if numbered 0-7) to allow the unit to stabilize.
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2. Adjusting Temperature:
Rotate the control knob to adjust the desired temperature. Turning the knob towards 'Colder' (or higher numbers) will decrease the temperature, while turning it towards 'Warmer' (or lower numbers) will increase the temperature. Allow several hours for the refrigeration unit to reach the new set point before making further adjustments.
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3. Monitoring:
Use an independent thermometer to verify the actual temperature inside the refrigerated compartment. Adjust the control as needed to achieve and maintain the desired temperature.
Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your cold control.
- Cleaning: Periodically inspect the control unit and its surroundings for dust or debris. Gently clean with a dry, soft cloth. Ensure no moisture enters the control unit.
- Capillary Tube Inspection: Annually inspect the capillary tube for any signs of damage, kinks, or corrosion. Ensure it remains securely fastened in its sensing location.
- Electrical Connections: During routine refrigeration unit maintenance, verify that all electrical connections to the cold control are tight and free from corrosion.
Troubleshooting
If you experience issues with your refrigeration unit's temperature control, consider the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Refrigeration unit not cooling | Control set too high; faulty wiring; damaged capillary tube; control failure. | Adjust control to a lower setting. Check wiring connections. Inspect capillary tube for damage. If issues persist, professional diagnosis may be required. |
| Refrigeration unit freezing contents | Control set too low; capillary tube improperly placed; control failure. | Adjust control to a higher setting. Verify capillary tube placement. If issues persist, professional diagnosis may be required. |
| Temperature fluctuates widely | Capillary tube not sensing correctly; control unit faulty. | Ensure capillary tube is properly positioned and undamaged. Consider professional inspection if fluctuations continue. |
For complex issues or if you are unsure about any troubleshooting steps, it is recommended to contact a qualified refrigeration technician.
Specifications
- Model: K50Q-1127-001
- Control Temperature Range: 34°F to 55°F (1.1°C to 12.8°C)
- Cold Off Temperature: 35.6°F (2°C)
- Cold On Temperature: 41°F (5°C)
- Contact Form: SPST (Single Pole, Single Throw)
- Capillary Length: 47 1/4 inches (120 cm)
- Capillary Type: Capillary
- Full Load Current: 10/6 A
- Locked Rotor Amps: 80 A
- Overall Height: 2 1/2 inches (6.35 cm)
- Overall Length: 1 1/8 inches (2.86 cm)
- Includes: Faceplate, Mounting Hardware
Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact the seller directly. For technical support or further assistance, please reach out to the Ranco manufacturer or your product supplier.
