The Guardian Telecom WRR Series is a line of weatherproof industrial ringdown telephones designed for reliable point-to-point communication in harsh environments. These telephones are suitable for use in refineries, mills, plants, warehouses, airports, ski hills, or areas with high humidity.
Function Description
The WRR Industrial Ringdown Telephone is a rugged device that, when the handset is lifted, automatically dials a pre-programmed number, facilitating immediate communication. It can be supplied with an optional Auto Dialer or configured for dialing through a PABX.
Important Technical Specifications
Electrical Performance:
- Audible Range Frequency Response: 300 – 3400 Hz
- Transmit Objective Loudness Rating (TOLR): -41 +/- 4 dB
- Receive Objective Loudness Rating (ROLR): Typical 50 +/- 3 dB
- Side Tone Objective Loudness Rating (SOLR): Typical 11 +/- 4 dB
- Ringer Output: >80 dB
- FCC Ringer Equivalence: 0.8A
- Set Impedance: 600 Ohms Nominal
- Maximum Loop: 15,000 FT (4,600 M) of 22 AWG Copper
Electrical Requirements:
- Ringer Sensitivity: 40 – 100 V, 16 – 25 Hz
- Line Voltage: 24 – 56 VDC
- Loop Current: 20 – 120 mA
- Connection Method: Surge Arrestor / Terminal Block
- Fuse: ¼ AMP 3AG Fast Blow
Environmental:
- Weatherproof: Enclosure NEMA 3R
- Temperature: -40° to +140° F (-40° to +60° C)
- Humidity: 0 to 95% RH
- Dustproof: Fully Gasketted Enclosure
- Corrosion Resistant: MIL-STD-810E Salt Fog
Mechanical:
- Hook Switch (Cradle Switch) Life: >1,000,000 Operations
- Body Construction: GE Valox® 357 Engineering Polymer
- Dimensions (H x W x D): 14 x 9.7 x 3.9 inches (356 x 246 x 99 mm)
- Net Weight: 5.5 LBS (2.5 KG)
- Handset Material: High Impact ABS
- Microphone: Noise Reducing Electret (Optional: Noise Canceling Dynamic)
- Receiver: Hearing Aid Compatible
- Standard Mounting: Vertical Wall
- Wiring Access: 7/8" Opening for Owner Supplied Fitting
- Hardware Material: Stainless Steel
Usage Features
Standard Features on All Models:
- Enclosure: Weather-tight, rugged Valox® and steel construction with a spring-loaded hinged door.
- Faceplate: 16 Gauge steel with wiring access to the surge arrestor.
- Encapsulated Circuitry: Circuit boards are resistant to corrosive agents (e.g., H2S, SO2, and NH3) and high humidity environments.
- Surge Arrestor: Protects the user from high voltage spikes on the telephone line.
- Fuse: Prevents damage to electronic circuits from high voltage spikes.
- Magnetic Reed Hook Switch: Features no moving parts for enhanced durability.
- Hearing-Aid Compatible (HAC) Receiver: Compatible with inductively coupled hearing-aid devices.
- Receiver Volume Control: A switch in the handset provides 13.5dB of volume range.
Specific Model Features:
- WRR-11 (P6076): Includes a 6' Heavy Duty Handset Cord, designed to withstand severe use.
- WRR-41 (P6077): Features a 22" Anchored Armored Handset Cord for vandal resistance, handset retainer clips, and a stainless steel mounting plate (standard).
Options Available:
- Stainless Steel Mounting Plate (standard on WRR-41)
- 20' Heavy Duty Curly Cord (not available with WRR-41)
- Noise Canceling Microphone
- Grey Enclosure
- Autodialer P005156
Accessories:
- P7224 Potted ring detect relay
- P7225 Weather Proof ring detect relay
- P7227 Potted off-hook detect relay
- P7232 Weather Proof off-hook detect relay
- PXXXX External Loud Ringer
Maintenance Features
Installation:
- Follow all appropriate electrical codes and use approved electrical fittings.
- Choose a wall location free of obstructions, supporting 5.5 lbs (2.5 kg) plus any additional load.
- Ensure electrical connection circuits are not live during installation.
- Mounting can be done without or with an optional mounting plate using appropriate templates and screws.
- Wiring involves connecting Tip/Ring/Ground wires to the surge arrestor via the conduit entrance.
Field Repairs:
- Repairs must be carried out by qualified technicians using OEM parts to avoid voiding the warranty and potential hazards.
- Disconnect the telephone from Tip and Ring power before attempting repairs.
- Carefully remove the front cover assembly and separate it from the housing by disconnecting harness plugs, noting that the handset and electronics are attached to the front plate.
- Perform necessary repairs or adjustments.
- Carefully replace the front plate, ensuring the gasket is snug to maintain weather resistance.
Fuse Replacement:
- The fuse is a 0.25 amp, 250V, 3AG fast blow fuse.
- To replace, push in the end cap of the fuse holder and turn counterclockwise to open. Insert a new fuse and close the holder.
- WARNING: Only replace with the specified fuse type; failure to do so will void the warranty. If the fuse fails again after replacement, check the telephone system wiring. The unit is typically powered at 48 volts DC and must not be connected to 120 volts AC.
Product Return (RMA Process):
- On-Site Correction: First, check for improper installation, incorrect wiring, or connection to an incorrect power source (e.g., 120V AC instead of Tip & Ring). Replace the internal fuse if blown.
- Return Materials Authorization (RMA): If the unit still fails after on-site checks, contact Guardian Telecom to obtain an RMA number. This can be done online or by phone. Provide product information, owner details, and a description of the problem. Shipping documents must include the RMA number, owner's contact information, serial number, and date of export (for international returns).
- Factory Authorized Service: Upon receipt, products under warranty are repaired and returned within five working days. For products subjected to misuse, neglect, accident, or out of warranty, an estimate for repair costs will be provided before service.
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