1. Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of your Grothe LTW 1171A 24V AC Alarm Bell. Please read this manual thoroughly before attempting to install or operate the device and retain it for future reference.
The Grothe LTW 1171A is a compact, surface-mounted alarm bell designed for signaling purposes, operating on a 24V AC power supply and producing an 85 dB sound output.
2. Safety Information
- Electrical Safety: Installation must be performed by a qualified electrician in accordance with all local and national electrical codes. Ensure the power supply is disconnected before installation or maintenance.
- Voltage: This device operates on 24V AC. Connecting it to an incorrect voltage supply may cause damage to the unit and pose a safety hazard.
- IP Rating: The device has an IP00 protection class, meaning it offers no protection against dust or water ingress. It must be installed in a dry, indoor environment, protected from moisture and foreign objects.
- Sound Level: The alarm bell produces a sound level of 85 dB. Prolonged exposure to loud sounds may cause hearing damage.
- No Built-in Transformer: This unit does not include a built-in transformer. A suitable external 24V AC transformer must be provided for operation.
3. Package Contents
- 1 x Grothe LTW 1171A 24V AC Alarm Bell
- (Mounting hardware and transformer are not included and must be sourced separately)
4. Product Overview
The Grothe LTW 1171A is a compact and durable alarm bell designed for various signaling applications. Its white plastic casing ensures a discreet appearance.
Figure 1: Front view of the Grothe LTW 1171A Alarm Bell. Shows the white plastic casing with vertical grille openings for sound emission.
Figure 2: Side view of the Grothe LTW 1171A Alarm Bell. Illustrates the compact depth of the unit.
Key Features:
- Compact Design: Dimensions of 99 x 62 x 28 mm.
- Bell Diameter: 50 mm bell bowl.
- High Volume: 85 dB sound output.
- Power Requirement: Operates on 24V AC.
- Mounting: Designed for surface mounting.
- Material: Durable plastic casing.
- Color: White.
5. Setup and Installation
Important: Ensure power is disconnected at the main circuit breaker before beginning any installation work.
- Choose Location: Select a dry, indoor location for surface mounting, protected from dust and moisture, due to the IP00 rating.
- Mounting: Secure the alarm bell to the chosen surface using appropriate screws and wall plugs (not supplied). Ensure the mounting is firm and stable.
- Wiring: Connect the 24V AC power supply wires to the designated terminals on the alarm bell. This device requires an external 24V AC transformer (not supplied). The current consumption is 0.17 A. Ensure correct polarity if specified by the transformer or control unit.
- Secure Connections: Double-check all electrical connections to ensure they are secure and properly insulated.
- Restore Power: Once installation is complete and all connections are verified, restore power to the circuit.
Note: This device is designed for simple signaling. It does not include complex configuration options.
6. Operation
The Grothe LTW 1171A Alarm Bell operates by producing an audible signal when 24V AC power is applied to its terminals. It functions as a direct signaling device.
- When the connected 24V AC power source is activated, the bell will ring.
- When the 24V AC power source is deactivated, the bell will stop ringing.
The sound output is approximately 85 dB, suitable for general alarm or signaling applications in appropriate environments.
7. Maintenance
The Grothe LTW 1171A Alarm Bell requires minimal maintenance.
- Cleaning: Periodically wipe the exterior of the unit with a soft, dry cloth to remove dust. Do not use abrasive cleaners or solvents. Ensure no liquids enter the unit.
- Inspection: Occasionally inspect the wiring connections for any signs of wear, damage, or loose connections. Ensure the mounting remains secure.
- No User-Serviceable Parts: There are no user-serviceable parts inside the alarm bell. Do not attempt to open or repair the unit yourself. Refer any issues to qualified service personnel.
8. Troubleshooting
If the alarm bell is not functioning as expected, perform the following basic checks:
| Problem | Possible Cause | Solution |
|---|---|---|
| Bell does not ring. | No power supply. Incorrect voltage. Loose wiring connection. Faulty unit. |
Check if 24V AC power is being supplied to the unit. Verify the power supply is 24V AC. Inspect and secure all wiring connections. If all checks fail, the unit may be faulty and require replacement. |
| Bell rings continuously. | Constant power supply. Wiring short circuit. |
Ensure the control circuit is correctly switching the 24V AC power. Check wiring for any short circuits that might be supplying constant power. |
| Sound is weak or distorted. | Insufficient power. Obstruction. Internal damage. |
Verify the 24V AC power supply is stable and sufficient. Check for any physical obstructions around the bell mechanism. If persistent, the unit may have internal damage. |
If troubleshooting steps do not resolve the issue, contact qualified service personnel or the product supplier for assistance.
9. Specifications
| Feature | Detail |
|---|---|
| Brand | Grothe |
| Model Name | LTW 1171A |
| Part Number | 24083 |
| Nominal Voltage | 24 V AC |
| Current Consumption | 0.17 A |
| Volume | 85 dB |
| Bell Bowl Diameter | 50 mm |
| Dimensions (L x W x H) | 99 x 62 x 28 mm (3.9 x 2.4 x 1.1 inches) |
| Weight | 70 g |
| Case Material | Plastic |
| Case Colour | White |
| Protection Class (IP Rating) | IP00 |
| Mounting Type | Surface Mounting |
| Transformer Built-in | No |
10. Warranty and Support
Specific warranty information for the Grothe LTW 1171A Alarm Bell should be obtained from your point of purchase or directly from the manufacturer, Grothe. Please retain your proof of purchase for warranty claims.
For technical support or service inquiries, please contact the retailer where the product was purchased or refer to the official Grothe website for contact information.
