Danfoss UnoFloor Pre-assembled Distribution Stations Installation Guide

Danfoss UnoFloor Pre-assembled Distribution Stations

Take the prefab for each apartment and put away frame and door which are packed together for protection. The cardboard box can be used to protect frames and doors during construction phase.

In-wall mounting

Keep frame fixing bracket together with the frame and door!

Preparation and setup

Unbox the cabinet.

Positioning

Adjust the height. Check the horizontal leveling.

Pipe installation

Fill, flush and air

Before filling the installation check all connections! Fill the installation with water acc. to VDI 2035 or ONORM H 5195 one loop at a time. Flush and de- air each loop. Use the flow meters to individually shut off the loops .

Water pressure testing

Before filling the installation check all connections! Fill the installation with water acc. to VDI 2035 or ONORM H 5195 one loop at a time. Flush and de- air each loop. Use the flow meters to individually shut off the loops .

Air pressure testing

Follow national standard and safety instructions from EN 14336 Apply 0,5 bar air pressure for approx. 10 minutes and check for leakage. Possible leakages can be found with leakage spray or applying soap water.

1. All valves must be open.
2. Pressurize installation slowly.
3. Maximum 0,5 bar, keep clear.
4. Keep under pressure for approx. 10 minutes and check for leakage.

Air need to be applied to the system from outside the room of installation .

Dust cover

Put on a dust cover to protect the installation from dust, damage, and paint .

Hydronic balancing and drying screed

Sizing AB-PM

AB-PM is to be sized based on needed flow (Q) and needed differential pressure drop for the loop (Δpr). The settings for the manifold can be found at page5. Max flow data are presented in the table below. For any other Q and Δpr needed, setting can be identified based on Fig. 1

EN

Type| DN 20 HP

at 100% setting

Q max.| 600 l/h| 915 l/h
Maximum pressure drop avail- able for system at max flow| 20 kPa| 10 kPa
Max. pressure at zero load| 35 kPa
Start-Δpv (over valve)| 8 kPa

Loops pre-setting

Manifold, with a flowmeter

Heat up

If no mains power for heat up period (screed drying) do not remove red mounting split! Heat up the installation with TWA open, do not remove the retaining ring on the actuator! Plastic heat meter insert is not for permanent operation! Please exchange in case no heat meter is mounted!

Danfoss Icon™ Wiring Center 230V

Please power off the Wiring Center when during the installation! Wiring need to done by an authorized electrician! Do not forget the GROUNDING!

Connecting room thermostats

It is possible to connect up to 8 room thermostats. Power off the Wiring Center when wiring the thermostats. Detailed information could be found in the controller installation guide.

Activate TWA actuators

To activate, remove the red mounting split from TWA’s

Actuator wiring LEFT variant

The actuators are wired to respective terminals on the Wiring Center as below .

Danfoss Icon™ Wiring Center 230V

Basic, code no.: 088U1040, 088U1041, 088U1042.

1. 230 VAC output for pump.
2. 230 V Thermal actuator, Normally closed (NC).

Wiring details see separate Icon™ 230V instructions

Danfoss Icon™ Wiring Center 230V

1. Bridge (wire) – allows the use of additional outputs (max. 5 totally per thermostat).
2. Connect the bridge to the terminal marked with.
3. Don’t connect a thermostat to the channel which you took the additional outputs from!
4. You MUST use the same phase on all Wiring Centers!

Connecting more than 2 actuators to a single thermostat/room

• Max. number of thermostats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
• Max. number of actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
• Supported actuator type . . . . . . . . . . . . Normally closed (NC)
• Internal fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 A
• Conforms with directives . . . . . . . . . . LVD, EMC, RoHS, WEEE
• Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220-240 VAC
• Supply frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50/60 Hz
• Output voltage, actuators . . . . . . . . . . . . . . . . . . . . . . . . 230 VAC
• Ambient temp. range, in use . . . . . . . . . . . . . . . . . . . . 0 to +50˚C
• Storage temp. range . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +60˚C
• Output relay, pump . . . . . . . . . . . . . . . . . . . . . . 230V, max. 100W
• Output relay, boiler * . . . . . . . . . . . . . . Potential free, max. 2A
• Outputs, setback & cooling * . . . . . . . . . . . . 230V, when active
• Input, setback & cooling* . . . . . . . . . . . . . . . . . . Ext. switch input (230V rating)
• Rated impulse voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 kV
• Temp. for ball pressure test . . . . . . . . . . . . . . . . . . . . . . . . . . 75˚C
• Control polution degree . . . . . . . . . . . . . . . . Polution degree 2
• Disposal instructions . . . . . . . . . . . . . . . . . As electronic waste
• Operating time . . . . . . . . . . . . . . . . . . . . Permanent connection

only available on featured versions, code no.: 088U1040. Full data sheet is available at www.danfoss.com.

UnoFloor Mixing

FTC Temperature controller
FTC is a self-acting thermostatic sensor used for flow temperature control of floor heating. The water temperature is measured by a surface sensor. The snap-lock connector of the sensor element secures a firm connection to the valve.
Features:

• Closes on rising sensor temperature.
• Temperature range: 15 °C to 50 °C

UnoFloor Heating / Cooling

Application 0010

Application 0010: 4-pipe system with 2-way valves on supply pipes and automatic change over for cooling controlled by a reference room thermostat. Optional: Dewpoint sensor (recommended), circulation pump, heat demand signal and Global standby.

Application description

A 4-pipe system with 2-way valves on supply pipes and automatic change over for cooling controlled by the reference room thermostat. The system activates cooling mode via 2-way valves with thermal actuators on the supply and returns side by activating the corresponding outputs (M1 – M4). Note: In this application outputs 1, 2, 3 & 4 on Danfoss Icon™ Master is used for the application and cannot be assigned to thermostats. For cooling applications, it is always recommended to have a dew point sensor installed in the system to prevent moisture damage to floor and installations in cases where the relative humidity exceeds dew point. Four conditions must be true before cooling in a room is allowed:

• Reference room temperature must exceed the room setpoint + cooling hysteresis.
• No room has called for heating within a neutral time.
• The dew point sensor must not be active / no condensation risk present.
• The room thermostat must be enabled for cooling (default = enabled).

The Global standby is a potential free input that can be used to remotely put the system in Global away mode e.g. via an external 3rd party GSM module. When global standby input is active, all rooms receive a 15-degree Celcius setpoint.
Settings

• “SET 1” = Set desired cooling hysteresis for change-over [+2 to +4K]
• “SET 2” = Set neutral time that must pass without active heating or cooling, before changeover can be activated [3-6 Hrs.]

Settings on thermostat

Excluding rooms from cooling: To exclude a room from cooling – typically in bathrooms where cooling would be uncomfortable — go to the thermostat and set the menu too . See the Thermostat Installation Guide for further information.
Choose reference room thermostat: To assign a thermostat as a reference room thermostat, go to the desired reference room thermostat and in the menu set to . When selected the thermostat will control when the system goes from heating mode to cooling mode based on the actual temperature in the room. It is only possible to have one reference thermostat per system and if more than one thermostat is assigned as a reference, the last assigned will overwrite the previous reference room thermostats and cause these to revert to normal function.
Application test function

Enter the “Test” menu via the installer key. The Application test (APP test) is specific for each application. The test is split into steps to ensure that all components are installed correctly. Please follow the process.
Test steps

• Step 1:3 During the first five minutes, the outputs 1&2 are set to “ON” = heating mode/ hot flow side (up to 3 minutes opening time can be expected).
• Step 2:3 During the next five minutes, outputs 1&2 are set to “OFF”, and outputs 3 & 4 are set to “ON” = cooling mode/cold flow side (up to 3 minutes opening time can be expected).
• Step 3:3 During last 5 minutes, all outputs 1, 2, 3 and 4 should close.

BasicPlus or SSM)
Pos. 3| NC: 088H3110 / NO: 088H3111| xx pcs. thermal actuator, 24 V TWA-A
Pos. 4| 088U0251| 1 pc. dew point sensor, type CF-DS
Pos. 5| NC: 088H3110| 2 pcs. thermal actuator, 24 V TWA-A
Pos. 6| NC: 088H3110| 2 pcs. thermal actuator, 24 V TWA-A

UnoFloor Metering

Temperature range: 35–60 °C MTCV´s factory pre-setting 50 °C The temperature setting can be made after removing the plastic cover (3), by lifting it with a screwdriver using the hole (4). The temperature setting screw (5) must be turned with an allen-key to match the wanted temperature on the scale with the reference point. The plastic cover (3) must be pressed back into place after the setting has been made.It is recommended to control the set temperature with a thermometer. The temperature of the hot water from the last tapping point on the riser must be measured*. The difference between the measured temperature at the last tapping point and the temperature set on the MTCV is due to heat losses in the circulation pipe between the MTCV and the tapping point. where TVM valves (thermostatic mixing valves) are installed the temperature must be measured before the TVM valve.

Danfoss A/S
Climate Solutions danfoss.com. +45 7488 2222 Any information, including, but not limited to information on selection of product, its application or use, product design, weight, dimensions, capacity or any other technical data in product manuals, catalogs descriptions, advertisements, etc. and whether made available in writing, orally, electronically, online or via download, shall be considered informative and is only binding if and to the extent, explicit reference is made in a quotation or order confirmation. Danfoss cannot accept any responsibility for possible errors in catalogs, brochures, videos, and other material Danfoss reserves the right to alter its products without notice. This also applies to products ordered but not delivered provided that such alterations can be made without changes to the form, fit or function of the product. All trademarks in this material are property of Danfoss AS or Danfoss group companies. Danfoss and the Danfoss logo are trademarks of Danfoss A/S. All rights reserved.

References

• Engineering Tomorrow | Danfoss
• Danfoss Icon | Danfoss

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