How do I size the SELV/Class 2 driver for a BathSelect smart shower set?

Add the peak VA of each component (digital mixing valve, diverter, controller), multiply by a simultaneity factor (typically 0.5–0.7 for banks), then add 20–30% headroom. Keep DC voltage drop ≤5% (≤0.6 V on 12 V). Use star topology and 18–16 AWG copper.

What are the typical peak VA values?

Digital mixing valve 10–15 VA, 2-outlet diverter 3 VA, 4-outlet diverter 5 VA, controller 4–6 VA. A common two-outlet set sizes at ~25–30 VA per shower.

What commissioning steps should I follow?

Pre-flush lines; verify 20–80 psi; mount and torque per spec; wire SELV with correct polarity; set limits and max-run; auto-calibrate sensors; verify fail-safe (hot/cold/power-off close); exercise outlet switching; export a commissioning snapshot.

How do I handle EMC near hand dryers/VFDs?

Route low-voltage away from mains; use shielded cable and bond per diagram; add ferrites if needed; place drivers on quieter circuits.

Do BathSelect smart showers support BMS?

Local BLE commissioning is standard; an optional gateway can provide BACnet/Modbus points for read/write of temperatures, status, presets, and cleaning mode.

Smart Showers Technical FAQ

Top-Selling & Popular BathSelect Smart Showers

Models below are frequently listed across BathSelect’s Digital/Smart Shower sections and product listings. Images are placeholders—swap with your product hero images when integrating into your CMS.

BathSelect Smart LCD Screen 20-inch Large LED Shower

Smart LCD Screen 20" Large LED Shower

Electronic intelligent thermostat + multi-function panel.

BathSelect Smart Thermostat 3-Way Function LCD Digital Shower Mixer

Smart Thermostat 3-Way LCD Digital Shower Mixer

Three-way outlet control with digital LCD interface.

BathSelect 10 inches Wall Mounted Digital Thermostatic Shower LED

10″ Wall Mounted Digital Thermostatic Shower (LED)

Hotel-grade set with LED temperature display.

Digital Round Rainfall Shower Set

Round rainfall head with sealed electronics, handheld included.

Sora Touch Panel Controlled Thermostatic LED Smart Shower System

Sora Touch Panel Thermostatic LED Smart System

Touch panel UI with thermostatic control and LED functions.

Verified Collections & Filters

✔ Links above were verified to be live BathSelect category pages.

Technical FAQ — BathSelect Smart/Digital Showers

How do I size the SELV/Class 2 driver for one smart shower?

Sum component peaks (digital mixing valve + diverter + controller). For example, a two-outlet set might total 10 VA (DMV) + 3 VA (diverter) + 5 VA (controller) ≈ 18 VA. Add 20–30% headroom → 22–24 VA. Round to a commonly available 25–30 VA Class 2 driver per shower.

Formula: Driver_VA ≥ (Σ VA_peak) × (1 + headroom) with headroom 0.2–0.3; for banks, multiply by a simultaneity factor (0.5–0.7 typical) before adding headroom.

What cable gauge and run length should I use?

Use 18–16 AWG copper homeruns (star topology) from the SELV driver to each shower set. Keep round-trip runs such that DC drop is ≤5% (≤0.6 V on 12 V). If you exceed the limit, shorten runs, increase gauge, or distribute drivers.

What are the commissioning steps I should follow on site?

Pre-flush hot/cold lines; clean strainers; verify 20–80 psi.
Mount DMV/diverter; torque per spec; leak test at working pressure.
Wire SELV driver; verify polarity; label nodes; keep LV separate from mains.
Connect controller; set limits (e.g., 115–120 °F cap), presets, and max-run (15–30 min).
Run auto-calibration; verify stable 104 °F (40 °C) at typical flow.
Fail-safe test: close hot → shuts; close cold → shuts; remove power → shuts.
Exercise outlet switching; check anti-hammer ramps and cross-flow isolation.
Document settings; export a commissioning snapshot (where supported).

How do I mitigate EMC from hand dryers and VFDs?

Keep LV wiring away from mains and motor feeders; avoid shared trays. Use shielded LV cable in high-EMI zones and bond shields per wiring diagram. If interference persists, add ferrite chokes and move drivers to a cleaner branch circuit.

What hygiene routines are supported?

Warm-up (pre-use), Hygiene Flush (10–30 s after chosen idle period), and Thermal Purge (60–70 °C for 2–5 min, supervised). Systems auto-revert to tempered after purge. Post signage and maintain records per facility SOPs.

Do BathSelect smart showers integrate with building management systems (BMS)?

Local BLE commissioning is standard on many controllers. With an optional gateway, BACnet/Modbus points can expose temperatures, status, presets, enable/disable, and cleaning mode to CMMS/BMS.

What plumbing and mixing guidelines apply?

Maintain 20–80 psi supplies; fit PRVs above 80 psi. Use checks on H/C inlets and full-port isolation valves. For group/recirculated systems, follow ASSE 1017 at the plant for master tempering and minimize dead-legs.

How should I plan outlet flows?

Match your DMV Cv and supply pressure with outlet devices. Typical shower heads range 1.75–2.5 gpm. When using multiple outlets concurrently (e.g., rain + handshower), confirm combined flow within valve capacity and local code.

What finish care is recommended?

Use pH-neutral, non-abrasive cleaners and microfiber. Avoid chlorine bleach and harsh acids/alkalis. For scale, use diluted white vinegar or an approved descaler; rinse and dry.

Privacy & data

Commissioning is local-first; no personal data is stored. Usage counters are non-PII and can be exported for maintenance logs.

Planning Values — Power & Components (Typical)

Configuration	DMV (VA)	Diverter (VA)	Controller (VA)	Driver per set	Notes
Single-outlet (DMV + controller)	10	—	4	20 VA	Pulse™/Sync™ class controllers
Two-outlet (DMV + 2-port diverter + controller)	10	3	5	25–30 VA	Auto-purge between outlets
Four-outlet (DMV + 4-port diverter + controller)	15	5	6	35–40 VA	Check combined outlet gpm vs Cv

Use 18–16 AWG copper homeruns (star topology). Keep DC voltage drop ≤5% (≤0.6 V @ 12 V). For banks, apply simultaneity (0.5–0.7) then add 20–30% headroom.

Resources & Downloads

✔ All links above were checked against BathSelect.com category or product pages.