Danfoss Termix Compact 28 VMTD-FI Fact sheet

Fact sheet

Termix Compact 28 VMTD - FI

Ultimate solution for space heating and domestic hot water.

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.

Efficient heat exchanger

The substation is fitted with an efficient
plate heat exchanger, which ensures
the most favourable heat extraction
and achieves optimum comfort and
operating economy.

Electronic regulation

The Termix Compact 28 VMTD-FI is
built with a plate heat exchanger for
domestic hot water and direct sys­tem regulation for space heating. The
electronic control is pre-set from the
factory. Electrical components are
connected, and the unit is equipped
with a plug for 230 V a.c. As standard,
each circuit is also supplied with its
own flow controller. This allows the
greatest degree of individual control,
thus preventing oscillation at different
loads. It is recommended that dynam-

ic balancing valves be installed in the
building’s risers in the heat supply
and on the heating system’s return
line immediately before the unit.

Easy installation

The unit consists of two modules,
one for space heating and one for do­mestic hot water production, which
is easily assembled into one single
module. This modular design makes
work during installation significantly
easier, as the weight is split between
two modules during handling.

Flexible solution

Pipe connection can be made from ei­ther the top or bottom, which makes
this solution highly flexible. At the
same time, both space and time are
saved when installing.

1 AVQM = self-acti ng flow controll er with integrated wi th integrated

control valve

Minimal heat loss

Complete insulation of the unit en
sures minimal heat loss.

Reliable and easy to install

Termix Compact 28 VMTD-FI is a op­erationally reliable. A quality product
manufactured in Denmark, which is
easy to install and quickly commis­sioned.

FEATURES AND BENEFITS

• Fully insulated

• Flexible connections

• Substations for apartment buildings

• Direct heating with mixing loop

• Electronic control for heating and DHW

• Operates independently of differential
pressure and flow temperature

• Pipes and plate heat exchanger
made of stainless steel

www.danfoss.com

CIRCUIT DIAGRAM - EXAMPLE

DHF

DHR

HFL

HRL

DHW

DCW

HWC

B Heat Exchanger, DHW
F Electronic controller
X Plug connection
1 Ball valve
2 Single check valve
9 Strainer
10 Circulator pump
11 Domestic hot water pump
14 Sensor pocket, energy meter
16 Outdoor sensor
18 Thermometer
19 Surface sensor
24 Delivered loose with unit
25 Pressure gauge with ball valve
27 Actuator
30 Flow control w. control valve
40 Immersion sensor
48 Air vent, manual

Technical parameters:

Dimensions (mm):

Exchanger: Stainless steel AISI 316
Test pressure exchanger: 25 bar
Working pressure: 16 bar
Valve type: Danfoss
Operating temperature: Max. 110°C
Soldering material: Copper
Weight: 80 kg

Connections:

1. Primary flow line 1” RG int.

2. Primary return line 1” RG int.

3. Heating flow line 1” RG int.

4. Heating return line 1” RG int.

5. Domestic hot water ¾” RG int.

6. Domestic cold water ¾” RG int.

7. DHW circulation ¾” RG int.

Options:

Fitting piece for energy meter

DHW: CAPACITY EXAMPLES

Substation type:

Ter mix

Compact 28

VMTD-FI

VMTD 1- x

VMTD 2-x

VMTD 3-x

VMTD 4-x

*Heat meter not included.

DHW Capacity

[kW]

85 65 23,02 50 10/50

90 70 24,83 50 10/55
100 70 28,61 50 5/60
100 65 21,93 50 10/50
110 70 23,92 50 10/55
120 70 27,16 50 5/60
125 65 22,35 50 10/50
130 70 22,35 50 10/55
130 70 26,27 50 5/60
140 65 20,91 50 10/50
150 70 22,57 50 10/55
145 70 24,2 50 5/60

Supply flow
primary [°C]

Return flow

primary [ °C]

Pressure loss

primary [*kPa]

DHW tempera-

ture [°C]

HEATING: CAPACITY EXAMPLES

Substation type:

Ter mix

Compact 28

VMTD-FI

VMTD x-1 75 35/60 2150

VMTD x-2 95 35/60 2723

VMTD x-3 105 35/60 3010

VMTD x-4 115 35/60 3297

Heating Capacity

[kW]

Gemina Termix A/S · Member of the Danfoss Group · Navervej 15-17 · DK-7451 Sunds · Denmark
Tel.: [phone] · Fax: [phone] · [e-mail] · www.heating.danfoss.com

Heating circuit
secondary [°C]

Flow rate

secondary

[ l/h]

© Danfoss | DHS-SRMT/ PL | 2016 . 10

VL.LZ.J1.02