Danfoss Termix Distribution unit Operating guide

Operating Guide

Termix Distribution unit

1.0 Table of Contents

1.0	Table of Contents .............................................	1
2.0	Functional description......................................	2
3.0	Safety notes.....................................................	3
3.1	Safety Notes – general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3
4.0	Mounting ........................................................	4
4.1	Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4
4.2	Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6
4.3	Electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7

9.0	Danfoss installations guide...............................	19
9.1	Danfoss installations guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	19
10.0	Declaration......................................................	23
10.1	Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	23

5.0 Wiring .............................................................

5.1 Wiring description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.2 Wiring diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6.0	Design.............................................................	10
6.1	Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
6.2	Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11
7.0	Controls ..........................................................	12
7.1	Circulator pump UPM3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	12
7.2	Grundfos UPM3 AUTO L instructions . . . . . . . . . . . . . . . . . . . . . . . . . . .	13
7.3	Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	14
8.0	Troubleshooting ..............................................	15
8.1	Troubleshooting in general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	15
8.2	Troubleshooting HE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	16
8.3	Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	18

VI.GP.O4.02 / LUK40900 | 1

Operating Guide Termix Distribution unit

2.0 Functional description

Termix Distribution unit

Manifold system for floor heating

The Termix distribution unit can be directly connected to the Termix VMTD, VMTD mixer, VX and VVX units. The unit is supplied with meter fitting piece for domestic water, safety set or Combiluk as required.

The Termix distribution unit for connection of water and heating pipes in connection with hidden pipe installations allows for a large number of connections for cold water, hot water, radiators and floor heating with in dimensions of 530 x 565 x 380 mm (h x w x d). The compact solution ensures that even though all connections are in use the unit still fits into a 60 cm cupboard. The Termix distribution unit can be mounted with a spear in the ground in the early stages of building. When the building is finished and protected against theft the Termix district heating unit can be mounted.

The reliability is very high. The wireless controls comply with the newest EU standards (868 MHz) for electronic equipment. At this frequency the risk of signal disturbances from other electronic household appliances is very low.

The controls for the Termix distribution unit include a program for exercise of valves and pump and a pump stop to protect the circulation pump.

2 | © Danfoss | 2019.05

VI.GP.O4.02 / LUK40900

Operating Guide Termix Distribution unit

3.0 Safety notes

3.1 Safety Notes – general

The following instructions refer to the standard design of substation. Special versions of substations are available on request.

This operating manual should be read carefully before installation and start-up of the substation. The manufacturer accepts no liability for damage or faults that result from non-compliance with the operating manual. Please read and follow all the instructions carefully to prevent accidents, injury and damage to property. Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.

Please comply with the instructions issued by the system manufacturer or system operator.

Corrosion protection

All pipes and components are made of stainless steel and brass. The maximum chloride compounds of the flow medium should not be higher than 150 mg/l.

The risk of equipment corrosion increases considerably if the recommended level of permissible chloride compounds is exceeded.

Energy source

The substation is designed for district heating as the primary source of energy. However, also other energy sources can be used where the operating conditions allow it and always are comparable to district heating.

Application

The substation is designed to be connected to the house installation in a frost-free room, where the temperature does not exceed 50 °C and the humidity does not exceed 60%. Do not cover or wall up the substation or in any other way block the entrance to the station.

Choice of material

Choice of materials always in compliance with local legislation.

Safety valve(s)

We recommend mounting of safety valve(s), however, always in compliance with local regulations.

Connection

The substation must be equipped with features that ensure that the substation can be separated from all energy sources (also power supply).

Emergency

In case of danger or accidents - fire, leaks or other dangerous circumstances - interrupt all energy sources to the station if possible, and seek expert help.

In case of discoloured or bad-smelling domestic hot water, close all shut-off valves on the substation, inform the operating personnel and call for expert help immediately.

REACH

All Danfoss A/S products fulfill the requirements in REACH. One of the obligations in REACH is to inform customers about presence of Candidate list substances if any, we hereby inform you about one substance on the candidate list: The product

contains brass parts which contains lead (CAS no: 7439-92-1) in a concentration above 0.1% w/w.

Storage

Any storage of the substation which may be necessary prior to installation should be in conditions which are dry and heated.

Authorized personnel only

Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.

Please observe instructions carefully

To avoid injury to persons and damage to the device, it is absolutely necessary to read and observe these instructions carefully.

Warning of high pressure and temperature

Be aware of the installation’s permissible system pressure and temperature.

The maximum temperature of the flow medium in the substation is 110 °C.

The maximum operating pressure of the substation is 10 bar. PN 16 versions are available on enquiry.

The risk of persons being injured and equipment damaged increases considerably if the recommended permissible operating parameters are exceeded.

The substation installation must be equipped with safety valves, however, always in accordance with local regulations.

Warning of hot surface

The substation has got hot surfaces, which can cause skin burns. Please be extremely cautious in close proximity to the substation.

Power failure can result in the motor valves being stuck in open position. The surfaces of the substation can get hot, which can cause skin burns. The ball valves on district heating supply and return should be closed.

Warning of transport damage

Before substation installation, please make sure that the substation has not been damaged during transport.

IMPORTANT - Tightening of connections

Due to vibrations during transport all flange connections, screw joints and electrical clamp and screw connections must be checked and tightened before water is added to the system. After water has been added to the system and the system has been put into operation, re-tighten ALL connections.

VI.GP.O4.02 / LUK40900

Operating Guide Termix Distribution unit

4.0Mounting

4.1Mounting

Installation must be in compliance with local standards and regulations.

District heating (DH) - In the following sections, DH refers to the heat source which supplies the substations. A variety of energy sources, such as oil, gas or solar power, could be used as the primary supply to Danfoss substations. For the sake of simplicity, DH can be taken to mean the primary supply.

Connections:

Floor heating flow line (FHFL)

Floor heating return line (FHRL)

Connection sizes:

FHFL + FHRL:

G ¾” (int. thread)

Dimensions (mm):

H 710 x W 505 x D 175

Authorized personnel only

Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.

Weight (approx.): 20 kg

4 | © Danfoss | 2019.05

VI.GP.O4.02 / LUK40900

Operating Guide Termix Distribution unit

4.1.1 Installation

Mounting:

Adequate space

Please allow adequate space around the substation for mounting and maintenance purposes.

Orientation

The station must be mounted so that components, keyholes and labels are placed correctly. If you wish to mount the station differently please contact your supplier.

Drillings

Where substations are to be wall-mounted, drillings are provided

in the back mounting plate. Floor mounted units have support.	Keyhole for mounting.

Labelling
Each connection on the substation is labelled.
Before installation:
Clean and rinse
Prior to installation, all substation pipes and connections should be
cleaned and rinsed.
Tightening
Due to vibration during transport, all substation connections must
be checked and tightened before installation.
Unused connections
Unused connections and shut-off valves must be sealed with a
plug. Should the plugs require removal, this must only be done by
an authorized service technician.
Installation:
Strainer
If a strainer is supplied with the station it must be fitted according
to schematic diagram. Please note that the strainer may be
supplied loose.
Connections
Internal installation and district heating pipes connections must be
made using threaded, flanged or welded connections.

VI.GP.O4.02 / LUK40900

Operating Guide Termix Distribution unit

4.2 Start-up

Start-up, Heating with mixing loop

Start-up:

1: Pump speed

Set the pump to highest speed before start-up.

2: Start pump

Start the pump and heat through the system.

3: Open shut-off valves

The shut-off valves should then be opened and the unit observed as it enters service. Visual checking should confirm temperatures, pressures, acceptable thermal expansion and absence of leakage. If the system operates in accordance with design, it can be put to regular use.

4: Vent system

Switch off the pump and vent the installation after the radiators have been warmed up.

5: Adjust pump speed

Set the pump to the lowest speed consistent with comfort and electricity consumption.

Normally the change-over switch is set in the mid position (default). However for systems with under floor heating or single pipe loop systems, it may be necessary to turn the change-over switch upwards.

Higher pump speeds are only used if the heating requirement increases.

Under floor heating:

Pump stop function

If the substation is used in connection with under floor heating, the circulation pump must be connected to the pump stop function in the under floor heating controller. The pump must be stopped if all under floor heating circuits are closed.

Warranty

If this is not possible, then flow must be continued through the by-pass. Failing this, the pump will be at risk of seizure and any remaining warranty will be withdrawn.

Summer operation:

Switch off pump

In summer the circulation pump must be switched off and the shut-off valve to HE supply closed.

Running pump bi-weekly

It is recommended to start up the circulation pump (for 2 minutes) once a month during summer; the shut-off valve of the HE supply must be shut.

Electronic controller

Most electronic controllers will start up the pump automatically (please note manufacturer´s instructions).

Re-thighten connections

After water has been added to the system and the system has been put into operation, re-tighten ALL connections.

Pump

The pump must be switched off during system fill.

VI.GP.O4.02 / LUK40900

Danfoss Termix Distribution unit Operating guide

Operating Guide Termix Distribution unit

4.3 Electrical connections

Before making electrical connections, please note the following:

Safety notes

Please read the relevant parts of the safety notes.

230 V

The substation must be connected to 230 V AC and earth.

Potential bonding

Potential bonding should be carried out according to 60364-4-41:2007 and IEC 60364-5-54:2011.

Bonding point on the mounting plate below right corner marked with earth symbol.

Disconnection

The substation must be electrically connected so that it can be disconnected for repairs.

Outdoor temperature sensor

Outdoor sensors should be mounted so as to avoid exposure to direct sunlight. They should not be placed close to doors, windows or ventilation outlets.

The outdoor sensor must be connected to the station on the terminal block under the electronic control.

4.3.1 Thermoactuators

Activating the thermoactuators

The thermoactuators are supplied with a “first open” function, such that they are slightly open for frost protection until the electrical controller is installed. During commissioning, the “first open” function is disabled by removing the red mounting split on the thermoactuator.

Please check that the thermoactuators can fully close following disablement of the “-first open” function.

See the installation guide included with the thermoactuator.

4.3.2 IMIT Thermostat

IMIT Thermostat

The IMIT Thermostat is used to limit the underfloor heating flow temperature. The IMIT Thermostat is preset to 60 °C, shutting off the pump and the primary on/off valve when the flow to the underfloor heating exceeds 60 °C.

The IMIT Thermostat is (if not already factory-fitted) to be fitted on the secondary flow pipe as close to the heating interface unit as possible using the steel band provided.

Authorized electrician

Electrical connections must be made by an authorized electrician only.

Local standards

Electrical connections must be made in accordance with current regulations and local standards.

VI.GP.O4.02 / LUK40900

Operating Guide Termix Distribution unit

5.0Wiring

5.1Wiring description

Connecting the system’s circulation pump

The system’s circulation pump should be connected to the contact relay in the electrical floor heating controller, so the pump can automatically start and stop, depending on whether the thermoactuators are open or closed. If the pump pushes against closed valves it can overheat and burn out. The electric floor heating controller is not approved to supply power to the circulation pump.

The pump must therefore be supplied from an external connection box, such that only the 230 V phase (active) is fed through the relay contact on the electrical floor heating controller.

The neutral and earth connections must not enter the floor heating controller.

VI.GP.O4.02 / LUK40900

+ 16 hidden pages