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, efficient 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 flow 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 filling 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
CIRCUIT DIAGRAM - EXAMPLE
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16 |
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230 V |
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24 |
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25 bar |
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F |
4 bar |
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25 |
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DH |
9 |
1 |
18 |
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1 |
48 |
26 |
19 |
10 |
18 |
1 |
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HE |
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supply |
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25 bar |
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supply |
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24 |
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25 |
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27 |
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4 |
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DH |
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1 18 |
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1 |
19 |
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18 |
1 |
9 |
HE |
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return |
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1 |
30 |
1 |
A |
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20 |
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return |
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40 |
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18 |
1 |
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DHW |
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18 |
27 |
19 |
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DCW |
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B |
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30 |
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11 |
18 |
2 |
Circ. |
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AHeat exchanger HE
BHeat exchanger DHW
FElectronic controller 1 Ball valve
2 Non-return valve
4 Safety valve
9 Strainer
10Circulation pump
11DHW pump
16 Outdoor sensor
18Thermometer
19Surface sensor
20Filling/drain valve
24Delivered loose with unit
25Manometer with ball valve
26Manometer
27Actuator
30 Flow control w. control valve
48 Air escape, manual
Technical parameters: |
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Nominal pressure: |
PN 16 |
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DH supply temperature: |
Tmax |
= 120 °C |
DCW static pressure: |
Pmin |
= 0,5 bar |
Brazing material (HEX): |
Copper |
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Weight: |
approx. 75 kg |
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Dimensions (mm) |
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Without cover: |
H 970 × W 750 × D 440 |
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With cover: |
H 970 × W 800 × D 522 |
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Electrical supply: |
230V AC |
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Connections: |
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1. District heating (DH) supply |
wall |
2. District heating (DH) return |
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3. Heating (HE) supply |
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4. Heating (HE) return |
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5. Domestic hot water (DHW) |
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6. Domestic cold water (DCW) |
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7. DHW circulation (Circ.) |
Connections sizes:
DH + HE + DCW + DHW: G 1”(int. thread) Circulation: G 3/4”(int. thread)
Options:
•Cover
•Filling line
DHW: CAPACITY EXAMPLES, 10 °C / 50 °C
DHW |
Supply flow |
Return flow |
Pressure loss |
Flow rate |
capacity |
primary |
primary |
primary |
secondary |
[kW] |
[°C] |
[°C] |
[kpa] |
[l/h] |
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 |
HEATING: CAPACITY EXAMPLES
Heating |
Heating circuit |
Heating circuit |
Pressure loss |
Flow rate |
capacity |
primary |
secondary |
primary |
secondary |
[kW] |
[°C] |
[°C] |
[kpa] |
[l/h] |
70 |
90 / 45 |
40 / 70 |
50 |
2007 |
90 |
90 / 45 |
40 / 70 |
50 |
2580 |
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 |
Danfoss Randall Ltd. • Unit A4, Centre Point Business Park, Oak Road • Dublin 12 • Ireland
Tel.: +353 1800 930 243 • Fax: +353 1800 556 691 • districtheating@danfoss.com • www.dh.danfoss.com
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice.This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary eady agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
© Danfoss | DHS-SRMT/ PL | 2016. 02 |
VL.EH.K3.02 |
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