NP16214_01SL Schneider Unica Bus 8-Button HVAC Control Panel Silver Temperature Probe plus Display

The NP16214_01SL is the eight-button thermostat panel in a silver finish — a neutral grey silver specified where the device is repeated across many rooms and should not draw attention to itself. Mechanically, it is a three-module flush-mounted device with four rockers carrying eight function keys, a polycarbonate body with a polished and lacquered surface, and an installation depth of 29.3 millimetres.

Electrically, it is a KNX bus device on a single twisted pair, with amber and white LED signalling, built-in overcurrent protection, a varistor and reverse polarity protection. The thermostat application declares floor and room as its application, heating and cooling as its application type, and supports fan coil units, variable refrigerant flow systems, floor heating and ventilation, using an integrated temperature sensor for the room reading. The fixing frame and a set of twenty symbols are supplied in the box.

Because the finish is neutral, this is the version most often carried across a whole floor — which makes the documentation the critical deliverable. The symbols used, the layout convention and the group addresses must be recorded against the room number; otherwise, a replacement plate fitted years later will work but mislead.

The thermal side requires the same discipline. A combined panel measures the temperature where it is mounted, so the fan coil application should be set to use an external sensor or a mixed reference where the wall is exposed to draughts, glazing or solar gain. That decision should be taken at design stage rather than after the first heating season.

Local signalling uses an amber LED and a white LED. The brightness of both should be judged in the finished room after dark, because a panel that is unobtrusive under commissioning light can be conspicuous in a hotel bedroom.

Office developments are the largest application, where a neutral eight-key thermostat panel is repeated across rooms that differ in layout but not in the way lighting and temperature are used. Hotels specify it in corridors, public rooms and guest rooms with pale interiors. Healthcare buildings use it in consulting and treatment rooms where conditions must be visible and adjustable from one clean device.

Serviced apartments and student accommodation apply it because consolidating the keypad and thermostat reduces the number of wall devices and the trades that must coordinate at each position. Where a project uses several key counts and finishes, the neutral finish allows this version to sit within the same visual family as the lighting-only devices used elsewhere.