Danfoss VVX Compact 28 Fact sheet

Fact sheet

Termix VVX Compact 28

Indirect substation for buildings with up to 25 apartments

Application

The Termix VVX Compact 28 is acom­plete solution for hot water and space
heating with optimal safety, ecient
energy transfer, service-friendly con­struction and a compact design. The
substation is applicable, if a heat ex­changer is required or on a conver­sion to district heating, where the
existing equipment is unsuitable for
direct connection.

District heating (DH)

The district heating circuit is prefab­ricated with a ow controller with in­tegrated control valve as well as ther­mometers and ball valves.

Heating (HE)

The heating circuit consists of a plate
heat exchanger, safety valve, ma­nometer, thermometers, ball valves,
drain valve, air valve and circulation
pump. The heating circuit is con­trolled with an electronic controller
with an outdoor temperature sensor.

Domestic hot water (DHW)

The domestic hot water is prepared
in the plate heat exchanger and the
temperature is regulated with an
electronic controller. The efficient
heat exchanger offers exceptional­ly good heat extraction with high
output. No readjustment of the
DHW temperature is required after
installation and initial setting of the
controls. The electronic control au­tomatically retains the comfort tem­perature of the hot water, even when
the heating system is in reduced
operation during summer or if the
district heating plant changes oper­ating parameters between summer
and winter. An integrated circulation
pump for DHW is installed.

Options

Termix VVX Compact 28 can be de­livered with white-lacquered steel
cover and lling line between primary
and secondary side.

Construction

All pipes are made of stainless steel.
The connections are made by nuts
and gaskets.

FEATURES AND BENEFITS

• Substation for apartment buildings

• Thermostatic or electronic control
of heating and DHW temperature

• Capacity: 150 kW heating, 150 kW DHW

• DHW in sufficient quantity

• Operates independent of differential
pressure and flow temperature

• Minimum space required
for installation

• Pipes and plate heat exchanger
made of stainless steel

• Minimized risk of lime scale
and bacteria formation

www.heating.danfoss.com

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already on order provided that such alterations can be made without subsequential changes being necessary eady agreed.
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CIRCUIT DIAGRAM - EXAMPLE

1 18

25 bar

25

25 bar

25

1

DH

supply

DH

return

24

9 1 18

A Heat exchanger HE

16

230 V

B Heat exchanger DHW
F Electronic controller
1 Ball valve

F

4 bar

48

1 1

27

1

19

30

1

26

4

20

A

10 18

19

18

HE
supply

24

9

1

HE
return

2 Non-return valve
4 Safety valve
9 Strainer
10 Circulation pump
11 DHW pump
16 Outdoor sensor
18 Thermometer
19 Surface sensor
20 Filling/drain valve

40

18

27

19

30

B

1

18

DHW

DCW

24 Delivered loose with unit
25 Manometer with ball valve
26 Manometer
27 Actuator
30 Flow control w. control valve
48 Air escape, manual

Technical parameters:

Nominal pressure: PN 16
DH supply temperature: T
DCW static pressure: P
Brazing material (HEX): Copper

= 120 °C

max

= 0,5 bar

min

Weight: approx. 75 kg

Dimensions (mm)
Without cover: H 970 × W 750 × D 440
With cover: H 970 × W 800 × D 522

Electrical supply: 230 V AC

DHW: CAPACIT Y EXAM PLES, 10 °C / 50 °C

DHW

capacity

[kW]

100 70 22 50 2150
110 70 22 50 2365
120 70 22 50 2580
130 70 22 50 2795
140 70 22 50 3010
150 70 22 50 3225

Supply flow

primary

[°C]

Return flow

primary

[°C]

Pressure loss

primary

[kpa]

Flow rate

secondary

[l/h]

18 211

Circ.

Connections:

1. District heating (DH) supply

wall

2. District heating (DH) return

3. Heating (HE) supply

4. Heating (HE) return

5. Domestic hot water (DHW)

6. Domestic cold water (DCW)

7. DHW circulation (Circ.)

Connections sizes:

DH + HE + DCW + DHW: G 1” (int. thread)
Circulation: G 3/4” (int. thread)

Options:

• Cover

• Filling line

HEATING: CAPACITY EXAMPLES

Heating

capacity

[kW]

110 90 / 45 40 / 70 50 3153
120 90 / 45 40 / 70 50 3440
140 90 / 45 40 / 70 50 4013
150 90 / 45 40 / 70 50 4300

Heating circuit

primary

[°C]

Heating circuit

secondary

[°C]

Pressure loss

primary

[kpa]

secondary

70 90 / 45 40 / 70 50 2007
90 90 / 45 40 / 70 50 2580

Flow rate

[l/h]

Danfoss Randall Ltd . • Unit A4, Centre Point Business Park, Oak Road • Dublin 12 • Ireland
Tel.: [phone] • Fax: [phone] • [e-mail] • www.dh.danfoss.com

© Danfoss | DHS-SRMT/ PL | 2016. 02

VL.EH.K3.02