The Mira Logic Shower Fittings Adjustable Range is a set of shower components designed for use with mixer and digital showers, offering an adjustable spray handset and various installation options. The product is manufactured by Kohler Mira Limited and is intended for domestic use.
Function Description:
The Mira Logic Shower Fittings provide a showering experience with an adjustable spray handset. The handset features four distinct spray actions, allowing users to customize their shower. The fittings are available in two main configurations:
- Mira Logic Exposed Variable Shower Fittings (ev): This includes an adjustable spray handset, flexible hose, clamp bracket assembly, slide bar, supports, and a hose retaining ring/gel holder. It is designed for exposed pipework installations.
- Mira Logic Built-in Variable Shower Fittings (biv): This offers the same features as the Logic ev but also includes a right-angle connector (RAC) for connection to concealed pipework supplies. Both versions are available in a chrome finish.
The slide bar allows for vertical adjustment of the handset, and the clamp bracket assembly enables angle adjustment, ensuring the spray can be directed as desired. The hose retaining ring is a crucial safety feature, preventing the handset from dropping below the spill-over level of the bath or shower tray, thereby preventing water supply contamination due to back-siphonage.
Important Technical Specifications:
- Minimum Maintained Pressure: 0.1 bar
- Maximum Maintained Pressure: 5.0 bar
- Maximum Head of Water (Gravity Fed): 1.0 meter (to accommodate pressure loss in pipes and shower control)
- Minimum Vertical Distance (Pump Installation): 0.6 m (600 mm) between the base of the cold water storage cistern and the shower head for pump flow switches to operate.
- Slide Bar Length (Max): 344 mm
- Overall Height (Installed): 659 mm
- Hose Lengths: 1.25m (standard) or 1.75m (for Mira Excel Thermostatic BSM)
- Hose Washer: 15 mm rubber washer
The flow rates vary depending on the selected spray mode and pressure:
- Mode 1 (Full ON): Highest flow rate, e.g., ~28 L/min at 150 kPa.
- Mode 2 (First Row ON): Lower flow rate than Mode 1, e.g., ~22 L/min at 150 kPa.
- Mode 3 (Second to Fifth Row ON): Lower flow rate than Mode 2, e.g., ~15 L/min at 150 kPa.
- Mode 4 (First, Second, and Third Row ON): Lowest flow rate, e.g., ~8 L/min at 150 kPa.
Usage Features:
- Adjustable Spray Handset: Offers four distinct spray modes (Mode 1: Full ON, Mode 2: First Row ON, Mode 3: Second to Fifth Row ON, Mode 4: First, Second, and Third Row ON) for a personalized showering experience.
- Clamp Bracket Adjustment: The clamp bracket can be easily slid up and down the slide bar by depressing a release button, allowing for height adjustment. A friction mechanism within the clamp bracket holds the handset at the desired angle.
- Hose Retaining Ring: Ensures the handset remains above the spill-over level of the bath or shower tray, preventing back-siphonage and maintaining water hygiene.
- Recommended Usage: Primarily designed for domestic use, but also suitable for light commercial applications. Not recommended for heavy commercial or healthcare settings.
- Installation Flexibility: The slide bar can be positioned to one side of the shower control at a convenient height. For bath installations, the spray should point down the center line of the bath; for cubicles, it should point across the opening.
- Right Angle Connector (RAC) (biv models): Facilitates connection to concealed pipework, providing a neat and integrated appearance.
Maintenance Features:
- Cleaning: The chrome-plated and plastic fittings should be cleaned with a mild washing-up detergent or soap solution and wiped dry with a soft cloth. Abrasive or chemical cleaners should be avoided.
- Spray Plate Assembly - External: Limescale can be removed from the soft rubber nozzles and the front face of the spray plate assembly using a thumb or a soft cloth.
- Fault Diagnosis: The manual provides a comprehensive fault diagnosis table to help users troubleshoot common issues such as no flow/low flow, dripping, temperature changes when adjusting spray, and strong spray force. This includes remedies like clearing blockages, checking valves, cleaning the spray plate, or referring to the shower control manual.
- Spares and Accessories: Genuine Mira spares and accessories are available for purchase, ensuring longevity and continued performance of the product.
- Products must be installed, used, and maintained according to instructions.
- Only suitable for Mixer and Digital showers.
- All warnings, cautions, and instructions in the guide must be followed.
- Assistance is recommended for individuals who may have difficulty operating the controls (young, elderly, infirm, or inexperienced users).
- Proper disposal of the product at the end of its life is required, in accordance with local recycling policies.
- The hose retaining ring is mandatory to prevent back-siphonage.
- Installations must comply with UK Water Regulations/Bye-laws (Scotland) and Building and Plumbing Regulations.
- Avoid sharp kinks in the shower hose to prolong its life.
- Do not fit any form of flow control in the shower outlet.
- Do not use excessive force when making connections.
- Ensure a minimum of 25 mm between the handset and bath/tray spill-over level to prevent back-siphonage.
- When drilling for installation, ensure no buried cables or pipes are present in the wall.
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