Danfoss VMTD MIX-I-FI Fact sheet
Fact sheet
Termix VMTD MIX-I-FI
Direct heating substation for direct heating with mixing loop and instantaneous domestic hot water with flow compensated temperature controller.
Application
The Termix VMTD MIX-I-FI is a complete
solution with built - in water heater and
heating system with differential pressure
control and mixing loop. The Termix VMTD
MIX-I-FI is applicable for single-family houses and for decentralized systems in multi family houses.
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 strainer and ball valves.
Furthermore the substation can be delivered with a weather compensated mixing
loop including pump, controls and non - return valve.
Heating (HE)
The heating circuit is designed for direct
connection. The mixing loop creates a suitable temperature level e.g. for underfloor
heating and ensures optimum control and
monitoring of the heating system.
Domestic hot water (DHW)
The domestic hot water is prepared in
the heat exchanger and the temperature is regulated with a thermostatic and
flow-compensated controller with integrated differential pressure controller.
The heat exchanger offers superb heat extraction of the DH water, thereby creating
an excellent operating economy. The Danfoss IHPT valve insures a stable hot water
temperature by varying loads, supply
temperatures and by high and varying differential pressure without the need for readjusting the valve. This protects the heat
exchanger against overheating and lime
scale formation. Furthermore the IHPT
valve has an integrated idle temperature
controller, which keeps the house supply
line warm. This shortens the waiting periods during summer when the heating system is in reduced operation, which is ideal
where high comfort is requested.
Options
The substation can be supplied with a connection for hot water circulation.
Insulation
The Termix VMTD MIX-I-FI comes complete
with a fully insulated cover thus minimizing heat loss both during tapping of domestic hot water but also when only space
heating is required.
Construction
All pipes are made of stainless steel. The
connections are made by nuts and gaskets.
FEATURES AND BENEFITS
• Substation for DH and
decentralized systems
• Direct heating with differential
pressure controller
• DHW thermostatic and flow
compensated temperature controller
• Capacity: 32 – 61 kW for DHW
• DHW in sufficient quantity
• Operates independently 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
• Complete insulation ensures
minimal heat loss
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CIRCUIT DIAGRAM - EXAMPLE
DHW
DCW
DH
Supply
B Heat exchanger DHW
1 Ball valve
2 Non-return valve
2C Single check valve incl. circ. pipe
7 Thermostatic valve
9 Strainer
10 Circulator pump
14 Sensor pocket, heat meter
18 Thermometer
21 To be ordered separately
24 Delivered loose with unit
31 Differential pressure
controller
41 Fitting piece, energy meter
63 Sieve
74 IHPT
HE
Supply
DH
Return
Technical parameters:
Nominal pressure: PN 10
DH supply temperature: T
DCW static pressure: P
Brazing material (HEX): Copper
= 110 °C
max
= 1,0 bar
min
Weight incl. cover: 25 kg
Insulation cover: Anthracite grey EPP
Dimensions (mm): H 660 × W 540 × D 335
Connections:
1. District heating (DH) supply
2. District heating (DH) return
3. Heating (HE) supply
4. Heating (HE) return
5. Domestic hot water (DHW)
6. Domestic cold water (DCW)
Connections sizes:
DH + HE: G ¾“ (int. thread)
DCW + DHW: G ¾“ (int. thread)
Options:
• Safety valve and non - return valve
(10 bar)
• Pressure equalizer GTU
• Thermostatic circulation set
• Connection for hot water circulation
HE
Return
HEATING: CAPACITY EXAMPLES
Substation type
Ter mix
VMTD MIX-I-FI 1/2/3 15 75/30 30/40 20 287 1290
VMTD MIX-I-FI 1/2/3 15 80/30 30/40 15 258 1290
VMTD MIX-I-FI 1/2/3 15 90/30 30/40 10 215 1290
VMTD MIX-I-FI 1/2/3 20 75/40 40/65 50 491 688
VMTD MIX-I-FI 1/2/3 20 80/45 45/70 50 491 688
VMTD MIX-I-FI 1/2/3 20 90/50 50/70 40 430 860
Heating capacity
[ kW ]
Heating circuit
primar y [ °C ]
Heating circuit
seconda r y [ °C ]
Pressure loss
[ kPa ]
Flow rate
primar y [ l / h]
DHW: CAPACITY EXAMPLES
CAPACITY, WEIGHT AND DIMENSIONS
Substation type
VMTD MIX-I-FI 1
VMTD MIX-I-FI 2
VMTD MIX-I-FI 3
Plate heat
exchanger
XB06-H+ 26
IHPT 3,0
XB06-H+ 40
IHPT 3,0
XB06-H+ 60
IHPT 3,0
DHW capacity
[ kW ]
32.3 60 16 45 27 13.3
43.0 60 17 45 45 17.7
37.0 70 16 50 22 13.3
51.0 70 17 50 42 18.4
32.3 55 17 45 25 13.3
43.0 55 18 45 45 17.7
32.3 60 15 45 20 13.3
49.0 60 16 45 42 20.2
39.0 70 15 50 19 14.1
58.0 70 16 50 40 20.9
42.0 55 16 45 35 17.3
49.0 60 15 45 35 20.2
61.0 70 15 50 35 22.0
Supply flow
primar y [ °C ]
Return flow
primar y [ °C ]
DHW
[ °C ]
Pressure loss
primar y [ kPa ]
Flow rate
seconda r y [ l /h]
DHW tap load
[ l / min]
Gemina Termix A/S · Member of the Danfoss Group · Navervej 15-17 · DK-7451 Sunds · Denmark
Tel.: +45 9714 1444 · Fax: +45 9714 1159 · mail@termix.dk · www.heating.danfoss.com
© Danfoss | DHS-SMDT/ PL | 2021 . 03
AM372947559862en-000101
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