Danfoss Termix Compact 28 VMTD-FI Operating Manual

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Operating Guide

Termix Compact 28 VMTD-FI

1.0 Table of Contents

1.0 Table of Contents ............................................. 1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.0 Functional description...................................... 3

3.0 Safety notes..................................................... 4

3.1

Safety Notes - general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4.0 Mounting ........................................................ 5

4.1

Mounting the Compactstation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4.2

Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.3

Electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.0 Design............................................................. 16

5.1

Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2

Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.0 Controls .......................................................... 18

6.1

Heating circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.2

DHW temperature control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.3

Other. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.4

Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

7.0 Troubleshooting .............................................. 25

7.1

Troubleshooting in general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

7.2

Troubleshooting DHW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.3

Troubleshooting HE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.4

Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

8.0 Declaration...................................................... 31

8.1

Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

AQ232286477252en-010301 / LUK42263 | 1

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Summary of Contents for Danfoss Termix Compact 28 VMTD-FI

Page 1: Table Of Contents
Operating Guide Termix Compact 28 VMTD-FI 1.0 Table of Contents 1.0 Table of Contents ..........1 7.0 Troubleshooting ..........25 ............... . 2 Troubleshooting in general .
Page 3: Functional Description
Space heating and domestic hot water (DHW) The Termix Compact 28 VMTD-FI is a complete unit for space heating and domestic hot water for direct district heating in large buildings such as sports centres, schools, blocks of ﬂats etc.
Page 4: Safety Notes
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...
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 Operating Guide Termix Compact 28 VMTD-FI Remove the front. Remove the other blocks and the white polystyrene. Attach the mounting rail to the wall. Lift the station’s heating section. AQ232286477252en-010301 / LUK42263 6 | © Danfoss | 2024.03...
Page 7 Operating Guide Termix Compact 28 VMTD-FI Mount the station as far to the left on the rail as possible. Lift the station’s instantaneous domestic hot water part. Mount the instantaneous domestic hot water part on the right-hand side of the ﬁttings.
Page 8 Operating Guide Termix Compact 28 VMTD-FI Attach the station to the wall in the holes on the mounting plate. Assemble the power connector on the hot water part of the station. For proper functionality, connectors must be paired by colour.
Page 9 Operating Guide Termix Compact 28 VMTD-FI Mount block B (D if it is the Magna pump) on the right-hand side of the pump. Mount block F (G for VM2 valve). The block is hinged and can be drawn around the valve. Attach the block to block B/D and E.
Page 10 Operating Guide Termix Compact 28 VMTD-FI Mount block M. The block is hinged and can be drawn around the valve. Attach the block to block L. Mount the small front cover. Mount the large front cover. AQ232286477252en-010301 / LUK42263 10 | © Danfoss | 2024.03...
Page 11 Operating Guide Termix Compact 28 VMTD-FI 4.1.1 Installing the Compactstation 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.
Page 12 Operating Guide Termix Compact 28 VMTD-FI 4.1.2 Pipe connections up Remove the top block. Remove the pipe plugs at the top of the station. Remove U-clamps. Remove pipes. Angles and tees are turned so that pipes can be installed from above.
Page 13 Operating Guide Termix Compact 28 VMTD-FI Install the pipes. District heating supply pipes to be interchanged. Fit U-clamps. Fit the pipe plugs at the bottom of the station. Fit the top block. AQ232286477252en-010301 / LUK42263 © Danfoss | 2024.03 | 13...
Page 14: Start-Up
Operating Guide Termix Compact 28 VMTD-FI 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 15: Electrical Connections
Operating Guide Termix Compact 28 VMTD-FI 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 16: Design
Operating Guide Termix Compact 28 VMTD-FI 5.0 Design 5.1 Design Your substation might look different than the substation shown. Design description 11 Domestic hot water pump Heat exchanger, DHW 27A Actuator, HE 14 Sensor pocket, energy meter Electronic controller 27B Actuator, DHW...
Page 17: Schematic Diagram
Operating Guide Termix Compact 28 VMTD-FI 5.2 Schematic diagram Supply Supply Return Return Your substation might look different than the schematic diagram shown. Schematic description 10 Circulator pump 24 Delivered loose with unit Heat exchanger, DHW 11 Domestic hot water pump...
Page 18: Controls
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 19 Operating Guide Termix Compact 28 VMTD-FI 6.1.5 Electronic control Substations with electronic control must be set in accordance with manufacturer´s instructions. Where the room temperature is controlled by radiator thermostats, it is recommended that thermostats be set for minimum temperature in each room.
Page 20 Operating Guide Termix Compact 28 VMTD-FI 6.1.7 Circulator pump The UPML, UPMXL circulator pumps are designed for circulating liquids in heating systems with variable ﬂows, internally controlled with three proportional pressure curves and three constant pressure/power curves to be selected via user interface.
Page 21: Dhw Temperature Control
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 22 Operating Guide Termix Compact 28 VMTD-FI 6.2.3 Domestic hot water pump Important! It is necessary to mount a domestic hot water circulation pump on the water heater to avoid regulation problems. The circulation pump can not be switched off, since this will result in regulation problems.
Page 23: Other
Operating Guide Termix Compact 28 VMTD-FI 6.3 Other 6.3.1 Strainer Strainers should be cleaned regularly by authorized personnel. The frequency of cleaning would depend on operating conditions and the manufacturer’s instructions. 6.3.2 Fitting piece The substation is equipped with a ﬁtting piece for energy meter.
Page 24: 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. AQ232286477252en-010301 / LUK42263 24 | © Danfoss | 2024.03...
Page 25: Troubleshooting
Operating Guide Termix Compact 28 VMTD-FI 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 26: Troubleshooting Dhw
Operating Guide Termix Compact 28 VMTD-FI 7.2 Troubleshooting DHW Problem Possible cause Solution Too little or no DHW. Strainer in supply or return line clogged. Clean strainer(s). DHW circulation pump out of order or with Check circulation pump. too low setting.
Page 27: Troubleshooting He
Operating Guide Termix Compact 28 VMTD-FI 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 28 Operating Guide Termix Compact 28 VMTD-FI 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 29: Disposal
Operating Guide Termix Compact 28 VMTD-FI 7.4 Disposal Disposal note This symbol on the product indicates that it may not be disposed of as household waste.. It must be handed over to the applicable take-back scheme for the recycling of electrical and electronic equipment.
Page 31: Declaration
Operating Guide Termix Compact 28 VMTD-FI 8.0 Declaration 8.1 Declaration of conformity AQ232286477252en-010301 / LUK42263 © Danfoss | 2024.03 | 31...