Table of Contents
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Installation Guide
Termix VVX-I
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
5.0 Design............................................................. 8
5.1
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2
Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.0 Controls .......................................................... 10
6.1
Heating circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.2
DHW temperature control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.3
Other. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.4
Extras . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.5
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.0 Troubleshooting .............................................. 17
7.1
Troubleshooting in general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.2
Troubleshooting DHW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.3
Troubleshooting HE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.4
Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.0 Declaration...................................................... 23
8.1
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Danfoss District Energy
VI.EH.G3.02 / LUK40440
DEN-GT
1
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Summary of Contents for Danfoss Termix VVX-I
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Page 1: Table Of Contents
Installation Guide Termix VVX-I 1.0 Table of Contents 1.0 Table of Contents ..........1 2.0 Functional description........2 3.0 Safety notes............. 3 Safety Notes – general ..........3 4.0 Mounting ............ -
Page 2: Functional Description
District heating substation for indirect heating and instantaneous domestic hot water. Application The Termix VVX-I is a complete solution for hot water and space heating with optimal safety, efficient energy transfer, service-friendly construction and a compact design. The substation is used if a heat exchanger is required or on a conversion to district heating where the existing equipment is unsuitable for direct connection. -
Page 3: Safety Notes
Installation Guide Termix VVX-I 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. Authorized personnel only This operating manual should be read carefully before installation Assembly, start-up and maintenance work must be performed by and start-up of the substation. -
Page 4: Mounting
Assembly, start-up and maintenance work must be performed by primary supply to Danfoss substations. For the sake of simplicity, qualified and authorized personnel only. DH can be taken to mean the primary supply. - Page 5 Installation Guide Termix VVX-I 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.
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Page 6: Start-Up
Installation Guide Termix VVX-I 4.2 Start-up Start-up, Indirect heating Filling: Re-thighten connections 1: First fill After water has been added to the system and the system has been When carrying out first fill, the heat exchanger must be slowly filled put into operation, re-tighten ALL connections. -
Page 7: Electrical Connections
Installation Guide Termix VVX-I 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. -
Page 8: Design
Installation Guide Termix VVX-I 5.0 Design 5.1 Design Your substation might look different than the substation shown. Design description A Heat exchanger, HE 10 Circulation pump 38 Expansion tank B Heat exchanger, DHW 14 Sensor pocket, energy meter 41 Fitting piece, energy meter... -
Page 9: Schematic Diagram
Installation Guide Termix VVX-I 5.2 Schematic diagram Supply Supply Return Return Your substation might look different than the schematic diagram shown. Schematic description A Heat exchanger, HE 10 Circulation pump 31 Differential pressure controller B Heat exchanger, DHW 14 Sensor pocket, energy meter... -
Page 10: Controls
Installation Guide Termix VVX-I 6.0 Controls 6.1 Heating circuit 6.1.1 Differential pressure controller The differential pressure controller smooths out the fluctuations in pressure arriving from the district heating network. The operating pressure in the substation is thus held steady. 6.1.2 HE temperature control The HE flow temperature in the heating circuit is controlled by the HE temperature controller. - Page 11 The controller is a self-acting flow controller with integrated control valve. The controller closes when set max. flow is exceeded and can be used in combination with Danfoss electrical actuators with or with out safety function. Spring return motor can be used as safety function by power failure.
- Page 12 Installation Guide Termix VVX-I 6.1.7 Outdoor temperature sensor (ESMT) 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. 6.1.8 TP7000 TP7000 electronic 7 day programmable room thermostat.
- Page 13 Installation Guide Termix VVX-I 6.1.9 Circulation pump ALPHA2 pumps have both variable speed pressure controlled operation, and standard selectable three speed operation. The unique AUTOADAPT feature allows the pump to match its performance to the system requirements, helping to reduce noise when thermostatic valves are closing down.
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Page 14: Dhw Temperature Control
Installation Guide Termix VVX-I 6.2 DHW temperature control DHW temperature control There are various types of DHW temperature control used in Danfoss substations. DHW temperature should be adjusted to 45-50 °C, as this provides optimal utilisation of DH water. At DHW temperatures above 55 °C, the possibility of lime scale deposits increases significantly. - Page 15 Installation Guide Termix VVX-I 6.3.2 Strainer Strainers should be cleaned regularly by authorized personnel. The frequency of cleaning would depend on operating conditions and the manufacturer’s instructions. 6.3.3 GTU Pressure Equalizer The GTU Pressure Equalizer absorbs the expansion on the secondary side of the Termix water heaters and can be used as a substitute to the safety valve.
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Page 16: Extras
Venting Checking that the system is thoroughly vented. Inspections should be carried out minimum every two years. Spare parts can be ordered from Danfoss. Please ensure that any enquiry includes the substation serial number. Danfoss District Energy DEN-GT... -
Page 17: Troubleshooting
Installation Guide Termix VVX-I 7.0 Troubleshooting 7.1 Troubleshooting in general In the event of operating disturbances, the following basic features should be checked before carrying out actual troubleshooting: • the substation is connected to electricity, Authorized personnel only • the strainer on the DH supply pipe is clean, Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only. -
Page 18: Troubleshooting He
Installation Guide Termix VVX-I 7.3 Troubleshooting HE Problem Possible cause Solution Too little or no heat. Strainer clogged in DH or HE circuit Clean gate/strainer(s). (radiator circuit). The filter in the energy meter on DH circuit Clean the filter (after consulting the DH clogged. -
Page 19: Disposal
Installation Guide Termix VVX-I Too high DH return temperature. Too small heating surface/too small Increase total heating surface. radiators compared to the total heating requirement of the building. Poor utilization of existing heating surface. Make sure the heat is distributed evenly Defective sensor on self-acting thermostat. - Page 20 Installation Guide Termix VVX-I Danfoss District Energy DEN-GT VI.EH.G3.02 / LUK40440...
- Page 21 Installation Guide Termix VVX-I Danfoss District Energy VI.EH.G3.02 / LUK40440 DEN-GT...
- Page 22 Installation Guide Termix VVX-I Danfoss District Energy DEN-GT VI.EH.G3.02 / LUK40440...
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Page 23: Declaration
8.1 Declaration of conformity 8.1.1 Category 0 with electrical equipment EC – Declaration of Conformity Gemina Termix A/S Member of the Danfoss Group Navervej 15-17 DK-7451 Sunds Declares on our sole responsibility that the below products: Substations – Category 0 with electrical equipment, covered by this declaration are in conformity with the following directives, standards and other normative documents, provided that they are used according to our instructions. - Page 24 Installation Guide Termix VVX-I Produced by Danfoss A/S © 03/2014...
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