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2.0 Functional description

District heating substation for indirect heating. Designed for
wall-mounting.

Application

The Termix VX is a complete solution for 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. The Termix VX
substation is ideal, when a high level of security against burst pipes
and water damage in the heating system is required.

District heating (DH)

The substation is prefabricated with a differential pressure
controller, fitting piece and sensor pockets for insertion of a heat
meter as well as strainers and ball valves.

Heating (HE)

The heating side consists of a stainless steel plate heat exchanger,
safety valve, manometer, thermometers, ball valves, drain valve, air
valve, expansion vessel and circulation pump. The temperature
of the heating can be controlled thermostatically or by an
electronic temperature controller with an outdoor temperature
sensor. Depending on the application, different heat exchangers
dimensioned for central or floor heating can be used. As an option
the substation can be equipped with a thermostat with safety
monitor. This is possible only for substations with electronic
temperature controller.

Domestic hot water (DHW)

The substation can be supplied with connection pipes for a hot
water tank on the primary or the secondary side of the heat
exchanger.

2 | © Danfoss | 2022.11

AQ221686472754en–010401 / LUK4030601

Operating Guide Termix VX with complete insulation

Содержание Termix VX

Страница 1: ...4 1 Mounting 4 4 2 Start up 7 4 3 Electrical connections 9 5 0 Design 10 5 1 Design 10 5 2 Schematic diagram 11 6 0 Controls 12 6 1 Heating circuit 12 6 2 Other 16 6 3 Maintenance 18 7 0 Troubleshooti...

Страница 2: ...heat meter as well as strainers and ball valves Heating HE The heating side consists of a stainless steel plate heat exchanger safety valve manometer thermometers ball valves drain valve air valve exp...

Страница 3: ...g 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 lis...

Страница 4: ...ating DH supply 2 District heating DH return 3 Heating HE supply 4 Heating HE return 5 Tank flow line TFL 6 Tank return line TRL Connection sizes DH HE G int thread TFL TRL G int thread Dimensions mm...

Страница 5: ...n 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 re...

Страница 6: ...ints of the bracket for the energy display and screw the two plugs supplied into the insulation front Mount the bracket for the display of the energy meter Mount the display calculator of the energy m...

Страница 7: ...in 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...

Страница 8: ...e 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 Runnin...

Страница 9: ...rically 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...

Страница 10: ...ansion tank 1 Summer valve 14 Sensor pocket energy meter 41 Fitting piece energy meter 4 Safety valve HE 20 Filling drain valve 48 Air vent manual 7 Thermostatic controller HE 26 Pressure gauge HE 9 S...

Страница 11: ...n valve 41 Fitting piece energy meter 9 Strainer 24 Delivered loose with unit 48 Air vent manual DH Supply District Heating Supply DH Return District Heating Return HE Supply Heating Supply HE Return...

Страница 12: ...temperature controller 6 1 3 RAVK controller RAVK controller 25 65 C The temperature setting is as follows 1 25 C 2 35 C 3 45 C 4 55 C 5 65 C The values are intended as a guide Thermostatic control Th...

Страница 13: ...direct sunlight They should not be placed close to doors windows or ventilation outlets 6 1 6 Circulator pump UPM3 UPM3 Pumps can be controlled in constant pressure proportional pressure or constant...

Страница 14: ...Constant pressure Auto adapt Proportional pressure 1 Proportional pressure 2 2 pipe systems Proportional pressure 3 MAX Constant pressure 1 1 pipe systems Constant pressure 2 Under floor heating Cons...

Страница 15: ...6 1 8 HE pressure gauge The HE pressure gauge indicates the pressure of the HE system AQ221686472754en 010401 LUK4030601 Danfoss 2022 11 15 Operating Guide Termix VX with complete insulation...

Страница 16: ...bserve any dripping from the safety valve It is recommended to check the operation of safety valves at intervals of 6 months This is done by turning the valve head in direction indicated 6 2 2 Straine...

Страница 17: ...on the fitting piece 3 Remove fitting piece Remove the fitting piece and replace it with the energy meter Do not forget the gaskets 4 Tighten connections After mounting of the energy meter remember t...

Страница 18: ...mperature and DHW temperature Connections Checking all connections for leakages Safety valves The operation of the safety valves should be checked by turning the valve head in the indicated direction...

Страница 19: ...H is at the normal level summer at least 60 C winter at least 70 C the differential pressure is equal to or higher than the normal local differential pressure in the DH network if in doubt ask the DH...

Страница 20: ...lation thoroughly Limiting of the return temperature adjusted too low Adjust according to instructions Defective radiator valves Check replace Uneven heat distribution in building because of incorrect...

Страница 21: ...The system should feature electronic controls as well as return sensors Pump pressure too high Adjust pump to a lower level Air in system Vent the system Defective or incorrectly set radiator valve s...

Страница 22: ...er to the applicable take back scheme for the recycling of electrical and electronic equipment Dispose of the product through channels provided for this purpose Comply with all local and currently app...

Страница 23: ...8 0 Declaration 8 1 Declaration of conformity AQ221686472754en 010401 LUK4030601 Danfoss 2022 11 23 Operating Guide Termix VX with complete insulation...

Страница 24: ...24 Danfoss 2022 11 AQ221686472754en 010401 LUK4030601 Operating Guide Termix VX with complete insulation...

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