Path A· FCU water system
Upscale new build—2/4-pipe FCU module to fan coil valves; Welcome/away/window policies from RCU.
- Modules:FCU 2-pipe/4-pipe
- Linkage: same scene table ascard power,lighting
- Suited: central plant, domestic upscale new build
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HVAC Comfort Control
Thermostats, fan coils and comfort scenes linked to card power and occupancy.
- 15–25%Guestroom HVAC energy reducible
(away limit + window protect) - 4Standard preset scenes
Welcome · away · window · night - 2/4-pipeFCU module forms
VRF gateway optional - LocalOffline keep-alive
scenes execute on RCU
* Temperature values are engineering examples; contract should state “confirm per owner energy standard and mock-up room measurement.”
HVAC scene table
Cite in tender docs—trigger conditions, target temp/airflow and linked subsystems; values in RCU scene config table revision.
| Scene | Trigger | FCU / VRF action | Linkage |
|---|---|---|---|
| Welcome | Card power ON / check-in | Set 22–24°C· low speed · valve open | Lighting·Shadingsame key |
| Occupied · guest adjust | Panel manual | Allow ±2°C trim (upper limit lockable) | Changes optionally report to PMS (integrator) |
| Away energy save | Card-out delay / unoccupied N min | 28°C standby · low fan · valve close optional | Enforced aftercard powerOFF |
| Window-open protect | Window sensor open / card in but window open | Close valve or low fan · optional alarm | Window sensor |
| Night / sleep | Sleep scene key / after 22:00 | 26°C· silent fan · valve hold | Withnight-path soft light |
| Checkout / vacant | Check-out / VC | Fan off · valve closed · no pre-cool/heat | Card power cut · optional cleaning scene |
FCU / VRF / panel · three deployments
Module selection
2-pipe FCU/4-pipeper water system.
Valve control logic
Open/close valve + 3 fan speeds; card power linkage in RCU.
Address table
Modbus / proprietary registers delivered with BOM.
Suited for
Domestic upscale new build, central chilled/hot water.
VRF gateway
VRF moduleto brand outdoor unit protocol.
Brand list
Confirm brand model and tested protocol version before contract.
Scene programming
Welcome/away setpoints still issued by RCU.
Suited for
VRF retrofit, no central plant.
Thermostat
Standard thermostatshows room and set temp.
LCD model
LCD thermostatfor upscale finish.
Permission lock
Lock upper temp, hide mode keys—prevent guest tampering.
With scene keys
Bedside “sleep” triggers HVAC night policy.
Standard room BOM · item 3 thermostat
| # | Point | Notes | Model |
|---|---|---|---|
| 1 | Door contact | Window-open protect input | Sensors |
| 2 | Card power | Away energy trigger | Card power solution |
| 3 | Thermostat | FCU/VRF · Welcome/away presets | Thermostat panel·FCU module |
| 4 | Bedside | Sleep scene linkage | Lighting·Shading |
| 6 | RCU | Scene engine | RCU catalog |
FCU vs VRF engineering comparison
| Comparison | FCU water system | VRF multi-split |
|---|---|---|
| Typical property | Upscale new · central plant | Retrofit · no central plant |
| PurePoint Smart module | smart-module-hvac-fcu series | smart-module-hvac-vrf |
| Protocol risk | Low (standard valve control) | Medium (brand-dependent) |
| Card power linkage | ★★★★★ | ★★★★☆ |
| Acceptance focus | Valve position · fan speed · room temp | Brand gateway integration · mode limits |
Two HVAC paths · tender selection
Define water system form then module—FCU and VRF share RCU scene linkage; differ in protocol and valve control.
Path B· VRF multi-split
Common retrofit—VRF gateway to brand outdoor protocol; Welcome/away setpoints from RCU; panel may lock upper temp.
- Module:VRF gateway
- Risk: confirm brand and tested protocol before contract
- Suited: VRF retrofit, no central water
Hardware topology reference
Commissioning& acceptance checklist
Protocol address
Per-room FCU/VRF address vs RCU channel table archived.
Scene-by-scene test
Welcome/away/window/sleep ×3 each; record room temp curve.
Card power interlock
After card removal delay, HVAC enters standby limit.
Offline test
RCU local scenes still run without cloud.
