Table of Contents
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Installation Guide
Termix VMTD Compact 20
1.0 Table of Contents
1.0 Table of Contents ............................................. 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.0 VMTD-C20 Functional description ..................... 3
3.0 Safety notes..................................................... 4
Safety Notes — general. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4.0 Mounting ........................................................ 5
4.1
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.2
Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.3
Electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.0 Design............................................................. 9
5.1
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2
Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.0 Controls .......................................................... 12
6.1
Heating circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2
DHW temperature control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.3
Other. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.4
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.0 Troubleshooting .............................................. 18
7.1
Troubleshooting in general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.2
Troubleshooting DHW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.3
Troubleshooting HE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.4
Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.0 Declaration...................................................... 23
8.1
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Danfoss Heating
VI.CW.W2.02 / LUK41200
DEN-GT
1
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Troubleshooting
Related Manuals for Danfoss Termix VMTD Compact 20
Summary of Contents for Danfoss Termix VMTD Compact 20
- Page 1 Installation Guide Termix VMTD Compact 20 1.0 Table of Contents 1.0 Table of Contents ..........1 ............... . 2 2.0 VMTD-C20 Functional description .....
- Page 2 Installation Guide Termix VMTD Compact 20 Danfoss Heating DEN-GT VI.CW.W2.02 / LUK41200...
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Page 3: Vmtd-C20 Functional Description
Designed for wall-mounting. Application The Termix VMTD Compact 20 substation is a complete solution with built-in water heater and heating circuit with differential pressure controls. The substation is applicable for multi-family houses and apartment buildings. -
Page 4: Safety Notes
Installation Guide Termix VMTD Compact 20 3.0 Safety notes 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 5: 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 6 Installation Guide Termix VMTD Compact 20 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 7: Start-Up
Installation Guide Termix VMTD Compact 20 4.2 Start-up Start-up, Heating with mixing loop Start-up: Re-thighten connections 1: Pump speed After water has been added to the system and the system has been Set the pump to highest speed before start-up. -
Page 8: Electrical Connections
Installation Guide Termix VMTD Compact 20 4.3 Electrical connections Before making electrical connections, please note the following: Safety notes Authorized electrician Please read the relevant parts of the safety notes. Electrical connections must be made by an authorized electrician only. -
Page 9: Design
Installation Guide Termix VMTD Compact 20 5.0 Design 5.1 Design Your substation might look different than the substation shown. Design description 11 Domestic hot water pump B Heat exchanger, DHW 27 Actuator, HE Electronic controller 31 Differential pressure controller Thermostatic controller, DHW... -
Page 10: Schematic Diagram
Installation Guide Termix VMTD Compact 20 5.2 Schematic diagram Termix VMTD Compact 20 - Electronic/thermostatic schematic diagram Supply Supply Return Return Your substation might look different than the schematic diagram shown. Schematic description B Heat exchanger, DHW 24 Delivered loose with unit... - Page 11 Installation Guide Termix VMTD Compact 20 Termix VMTD Compact 20 - Electronic schematic diagram Supply Supply Return Return Your substation might look different than the schematic diagram shown. Schematic description B Heat exchanger, DHW 10 Circulation pump 23 Ball valve...
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Page 12: Controls
Installation Guide Termix VMTD Compact 20 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. - Page 13 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.
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Page 14: Dhw Temperature Control
Installation Guide Termix VMTD Compact 20 6.1.6 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. -
Page 15: Other
Installation Guide Termix VMTD Compact 20 6.2.1 AVTB controller (20–60 °) The temperature setting is as follows: 1 = 20 °C 2 = 35 °C 3 = 50 °C 4 = 60 °C 5 = 70 °C The values are intended as a guide. - Page 16 Installation Guide Termix VMTD Compact 20 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 Domestic hot water pump Important! It is necessary to mount a domestic hot water circulation pump on the water heater to avoid regulation problems.
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Page 17: Maintenance
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 Heating VI.CW.W2.02 / LUK41200... -
Page 18: Troubleshooting
Installation Guide Termix VMTD Compact 20 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 •... -
Page 19: Troubleshooting He
Installation Guide Termix VMTD Compact 20 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 20: Termix Vmtd Compact
Installation Guide Termix VMTD Compact 20 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 21 Installation Guide Termix VMTD Compact 20 Danfoss Heating VI.CW.W2.02 / LUK41200 DEN-GT...
- Page 22 Installation Guide Termix VMTD Compact 20 Danfoss Heating DEN-GT VI.CW.W2.02 / LUK41200...
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Page 23: Declaration
Installation Guide Termix VMTD Compact 20 8.0 Declaration 8.1 Declaration of conformity Declaration of compliance Gemina Termix A/S Member of the Danfoss Group Navervej 15-17 DK-7451 Sunds do hereby on our own responsibility declare that the following products: Termix Substations... - Page 24 Installation Guide Termix VMTD Compact 20 Produced by Danfoss A/S © 01/2012...