Danfoss One-Q Operating guide

Operating Guide

Termix One-Q

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
5.0	Design.............................................................	6
5.1	Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6
5.2	Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7
6.0	Controls ..........................................................	9
6.1	DHW temperature control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9
6.2	Other. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
6.3	Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11
7.0	Troubleshooting ..............................................	12
7.1	Troubleshooting in general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	12
7.2	Troubleshooting DHW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	13
7.3	Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	14
8.0	Declaration......................................................	15
8.1	Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	15

© Danfoss | 2018.12

VI.GE.I5.02 / LUK38020 | 1

Operating Guide Termix One-Q

2.0 Functional description

District heating substation for direct heating and instantaneous domestic hot water with a self-acting thermostatic/flow controller. Designed for wall-mounting.

Application

The Termix One is an instantaneous water heater featuring superb heat extraction and high performance. The Termix One is suitable for flats, single-family houses as well as for small apartment buildings with up to 10 apartments. The water heater is available in three sizes, either for 1 apartment, for 1 4 apartments or for 5 up to 10 apartments. The Termix One is applicable for decentralized heating systems – as well as for district heating networks with summer operation at low temperatures or changes in differential pressure. The Termix One heat exchanger cools out the district heating water very efficiently, thereby creating a very good operation economy.

Domestic hot water (DHW)

The domestic hot water is prepared in the heat exchanger and the temperature is regulated with a self-acting thermostatic control valve that controls the DHW preparation by using a flow-compensation principle. The rapid closing of the control valve protects the heat exchanger against over heating and lime scale formation. The control valve ensures a stable hot water temperature by varying loads, flow temperatures and differential pressure without the need for readjusting the valve. The heat exchanger cools out the district heating water very efficiently, thereby creating a very good operating economy. The control valve also works as a bypass keeping the house supply line at 35 °C during standstill. This shortens the waiting periods during summer when the heating system is in reduced operation.

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Operating Guide Termix One-Q

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.GE.I5.02 / LUK38020

© Danfoss | 2018.12 | 3

Operating Guide Termix One-Q

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:

1.Domestic cold water (DCW)

2.Domestic hot water (DHW)

3.District heating (DH) supply

4.District heating (DH) return

Authorized personnel only

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

Connection sizes:

DH:

DCW + DHW:

Dimensions (mm):

Type 1 + 2 without cover: H 428 x W 312 x D 155 Type 1 + 2 with cover:

H 430 x W 315 x D 165 Type 3 without cover: H 468 x W 312 x D 155 Type 3 with cover:

H 470 x W 315 x D 165

G ¾” (int. thread)
G ¾” (int. thread)	The pipe placement can deviate from the shown drawing. Please note
	the markings on the station.

Weight (approx.): 10 – 12 kg

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Operating Guide Termix One-Q

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.GE.I5.02 / LUK38020

© Danfoss | 2018.12 | 5