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Siemens RDF880KN, S55770-T415

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Siemens RDF880KN, S55770-T415

Flush mount touch KNX room thermostat for heating applications and/or VRF Room Unit with KNX Interface to VRF Gateway, for square and round conduit boxes

  • Large display, touch screen with backlight
  • VRF HMI: temperature setpoint, fan speed and operating mode selections
  • 2-position (ON/OFF) temperature control with potential free output for UFH via build-in / external temperature sensor
  • Display room temperature value (↓C) and relative humidity value (% r.h.) via a build-in temperature and humidity sensor
  • One setpoint adjustment for both VRF HMI and UFH controls
  • Fan auto and manual speed setting from 1 up to 7 speed
  • Operating mode selection for VRF: AUTO, COOL, HEAT, FAN and DRY
  • Operating mode selection for UFH: Comfort and Protection
  • Economy operating mode for both VRF and UFH to save energy
  • 2 multifunctional inputs (see details in functional descriptions)
  • Adjustable control parameters for alternative settings
  • KNX bus communications via S-mode
  • Integration to VRF system via S-mode and third party gateways
  • Commissioning via ETS download
  • Wizard function for fast commissioning via HMI
  • Alarm / Error information
  • AC 230 V operating voltage
  • Mounting on round box, with min 60 mm diameter or recessed square 86 mm box with 60.3 mm fixing centers and min 40 mm depth

Additional info

User Application selections via dipswitches:
1. Under Floor Heating only (UFH)
2. VRF HMI only (note: interface to VRF indoor unit via a third party VRF/KNX gateway)
3. Both UFH and VRF HMI

When VRF HMI is selected, it covers most daily VRF operations and the following parameters can be set to fit different VRF brands:
· Setpoint adjustment: - maximum / minimum limitations
· Fan speed adjustment: - auto / manual speeds (up to 7 speeds)
· Operating mode selection: - AUTO, HEAT, COOL, FAN and DRY
· Economy mode: - energy saving
· Fan swing adjustment (optional): - auto swing or fix at any position (10)
· Delay off timer (optional): - allow up to 23 hours operations before off

HS Code: 90321020

Coo: China