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BathSelect® Smart Showers — Series‑Specific Technical Appendix (Digital Mixing & Controls)

Engineering planning data for BathSelect® Smart Showers: digital mixing valves, multi‑outlet diverters, and smart controllers used in hospitality, residential luxury, wellness, education, healthcare, and civic facilities.

Planning values below are typical design targets for driver sizing, wiring, hydraulics, torque, and commissioning. For stamped submittals, always use the latest cut sheet, BIM (.RFA), CSI, and wiring diagrams for your exact SKU and jurisdiction.

1) Model Families & Roles

1.1 Smart Controllers (User Interface)

Model Power Interfaces IP Rating Setpoints UI & Features Notes
Pulse™ Controller 12 VDC (SELV), 4 VA BLE (local), Dry‑contact input (occupancy) IP65 (behind panel) 80–120 °F (27–49 °C), default 104 °F (40 °C), limit 120 °F Glass/metal touch UI; 4 presets; pause; warm‑up; auto‑off 15–30 min Mount outside direct spray; low‑glare backlight
Sync™ Controller 12 VDC, 5 VA BLE + optional RS‑485 service port IP65 80–120 °F; limit 115–120 °F policy 6 presets; outlet icons; maintenance lock Good for hotels & spas
Nexus™ Controller 12–24 VDC, 6 VA BLE + BACnet/Modbus (gateway) IP65 (controller), Gateway in ELV closet 70–120 °F (21–49 °C), facility bands per role 8 presets; usage counters; cleaning mode Network‑aware with gateway (optional)

1.2 Digital Mixing Valves (DMV)

Model Inlets/Outlets Size & Threads Cv (approx.) Max Flow* Fail‑Safe Compliance Sensors
HydroMix™ 2P H/C → 1 outlet 1/2" NPT (F) in/out 2.5 8 gpm @ 45 psi Hot/cold fail‑close; power‑off close ASSE 1016; ASME A112.1016 Dual thermistors; flow; valve pos.
HydroMix™ 3P H/C → 1 outlet + 3‑port diverter bus 1/2" NPT (F) 2.5 8 gpm @ 45 psi Same as above ASSE 1016 As above + diverter sense
QuadraMix™ 4P H/C → 2–4 outlets via smart diverter 3/4" NPT (F) in/out 4.0 12 gpm @ 45 psi Same as above ASSE 1016 / 1069 (multi‑user)** Dual thermistors; flow; valve pos.

*Flow subject to local max‑flow rules and outlet devices (1.75–2.5 gpm typical shower heads).
**Use ASSE 1069 guidance for gang/accessible group showers; use ASSE 1017 at plant for master tempering if applicable.

1.3 Smart Diverters & Outlet Modules

Model Outlets Threads Power Notes
FlowHub™ 2 2 1/2" NPT (F) 12 VDC, 3 VA Auto‑purge between outlet changes; anti‑hammer ramp
FlowHub™ 4 4 1/2" NPT (F) 12 VDC, 5 VA For rain, handshower, body jets, tub; interlock logic

2) Electrical — VA, Drivers & Wiring

2.1 Per‑Unit VA (peak) & Recommended Driver (per set)

Configuration DMV (VA) Diverter (VA) Controller (VA) Driver per set (min) Notes
HydroMix 2P + Pulse 10 — 4 20 VA Single‑outlet digital shower
HydroMix 3P + FlowHub 2 + Sync 10 3 5 25–30 VA Two outlets (e.g., rain + handshower)
QuadraMix 4P + FlowHub 4 + Nexus 15 5 6 35–40 VA Up to four outlets; gateway optional

Bank sizing:
VAbank=N×VAset×SimultaneityVA_{bank} = N × VA_{set} × Simultaneity with Simultaneity 0.5–0.7 typical + 20–30% headroom. Keep voltage drop ≤ 5% (≤0.6 V on 12 V). Use star topology; 18 AWG typical; upgrade to 16 AWG for long runs.

2.2 Cabling & EMC

  • LV control cables: 18–22 AWG copper; separate from mains and hand dryer feeds.

  • In high‑EMI zones (VFDs), use shielded LV cable; bond shield per wiring diagram; add ferrites if needed.

  • Never share conduits with mains; label polarity and node IDs.

3) Mechanical — Threads, Torque & Mounting

3.1 Valve & Diverter Torques

Component Connection Torque (N·m) Notes
HydroMix 2P/3P union nuts 1/2" NPT to union 20–27 Use thread sealant/PTFE per code; do not over‑torque
QuadraMix 4P union nuts 3/4" NPT to union 27–35 Support piping to avoid valve strain
FlowHub diverter unions 1/2" NPT 18–24 Ramp‑open programming reduces hammer
Controller mounting Panel screws 0.6–0.9 Do not crush gasket; IP integrity

3.2 Pressure & Temperature

  • Operating pressure 20–80 psi; PRV above 80 psi; arrestors on aggressive mains.

  • Setpoint band 70–120 °F (21–49 °C); default 104 °F (40 °C); limit 115–120 °F per policy.

  • Thermal disinfection: 140–158 °F (60–70 °C) supervised for 2–5 min.

3.3 Plumbing Notes

  • Isolate with full‑port ball valves; install checks on H/C inlets; use service strainers.

  • For recirculated systems, follow loop balancing and anti‑dead‑leg practices; position DMV close to outlets.

4) Commissioning — Step‑by‑Step

  1. Pre‑flush hot and cold lines; clean strainers; verify water quality.

  2. Verify pressure 20–80 psi and supply temperature ranges.

  3. Mount DMV and diverter; torque per §3.1; leak test at working pressure.

  4. Wire SELV driver; star topology; verify polarity; label nodes.

  5. Connect controller; update firmware if prompted (service app).

  6. Program setpoint limits, max run (15–30 min), cleaning/housekeeping mode.

  7. Run auto‑calibration (thermistors/valve position); verify stable 104 °F output @ typical flow.

  8. Test fail‑safe: close hot, confirm DMV shuts; close cold, confirm DMV shuts; remove power, confirm close.

  9. Exercise outlet switching; check anti‑hammer ramps and cross‑flow isolation.

  10. If recirc present, verify warm‑up/purge routine and return temps.

  11. Document settings; export BLE snapshot (where supported); hand over O&M sheet.

5) Hygiene & Disinfection Routines

  • Warm‑up: Pre‑use flush to reach setpoint before enabling user control.

  • Hygiene flush: 10–30 s after chosen idle window (facility policy).

  • Thermal purge: 60–70 °C (140–158 °F) for 2–5 min, supervised; auto‑revert to tempered; signage/area control required.

  • Auto‑purge between outlets to clear stagnant branches on diverter change.

6) Controls & BMS Integration

  • Local BLE commissioning; store non‑PII counters (uses, runtime).

  • Optional gateway enables BACnet/IP or Modbus TCP (read: temps, valve pos., status; write: enable/disable, presets, cleaning mode).

  • Use role‑based setpoint bands (e.g., guest 95–109 °F, spa 95–112 °F, accessible 90–105 °F).

  • Log faults (sensor open/short, over‑temp, supply fail) to CMMS.

7) Troubleshooting (Quick Matrix)

Symptom Likely Cause Corrective Action
Temperature hunts Unbalanced H/C pressure, fouled strainers Balance supplies; clean strainers; re‑calibrate DMV
Low flow Outlet restrictor, low supply, debris Verify outlet gpm; check PRV; clean checks/strainers
Outlet cross‑flow Diverter seat debris Run valve seat clean cycle; inspect diverter
No response / resets LV noise, voltage drop Shorten runs; use 16–18 AWG; separate from mains; ferrite chokes
Over‑temp trip Setpoint limit exceeded or sensor fault Verify sensors; confirm limit policy; thermal test

8) Downloads (Placeholders — replace with live CMS URLs)

  • BIM/Revit Family Pack (.zip) — Smart Showers

  • Wiring Diagrams (.pdf) — DMV + Diverter + Controller

  • CSI 22 40 00 Appendix (.docx) — Digital Showers