Danfoss VMTD-F MIX-I Fact sheet
Fact sheet
Termix VMTD-F MIX-I
District heating substation for direct heating and instantaneous domestic hot water with thermostatic control.
Application
The Termix VMTD-F MIX-I is a complete solution with built-in water
heater and heating system with differential pressure control and mixing loop. The Termix VMTD-F MIX-I is
applicable for for single-family houses and for decentralised systems in
multi-family houses.
District heating (DH)
The substation is prefabricated
with a differential pressure controller, fitting piece and sensor pocket
for insertion of a heat meter as well
as strainer and ball valves. Furthermore the substation is delivered with
a mixing loop including pump, controls and non-return valve.
Heating (HE)
The heating circuit is designed for
direct connection. The differential
pressure controller sets the optimum operation conditions for radiator thermostats in order to enable
individual temperature control in
each room. The mixing loop creates
a suitable temperature level e.g. for
floor heating. In order to enable a
time-dependent temperature control program, a zone valve with actuator and a room thermostat can be
included as an option.
Domestic hot water (DHW)
The domestic hot water is prepared in
the heat exchanger and the temperature is regulated with a thermostatic control valve. The patented sensor
accelerator accelerates the closing of
the thermostatic control valve which
protects the heat exchanger against
over heating and lime scale formation.
The sensor accelerator and the control
valve also work as a bypass keeping the
house supply line warm. This shortens
the waiting periods during summer
when the heating system is in reduced
operation. The sensor accelerator helps
to ensure a stable DHW temperature by
varying loads, flow temperatures and
differential pressure without the need
for readjusting the valve.
Options
The substation can be supplied with
a built-in non-return valve and safety
valve mounted in the cold water supply. The substation can also be supplied with a thermostatic circulation
valve.
Construction
All pipes are made of stainless
steel. The connections are made
by nuts and gaskets. The Termix
VMTD-F MIX-B can be delivered with
white-lacquered steel cover in modern design.
FEATURES AND BENEFITS
• Substation for district heating and
decentralized systems
• Direct heating and DHW temperature
regulation with a flow-compensated
temperature controller
• Capacity: 33 - 55 kW 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
• Optimum temperature regulation up
www.danfoss.com
CIRCUIT DIAGRAM
DHW
39
DCW
DCW
DH
supply
DH
return
41A
14
41B
63
9
14
Technical parameters:
Nominal pressure: PN 10
DH supply temperature: T
DCW static pressure: p
Brazing material (HEX): Copper
= 120 °C
max
= 1,0 bar
min
Weight incl. cover: 25 kg
(incl. packing)
Cover: White-lacquered
steel sheet
Dimensions (mm):
Without cover: H 770 × W 535 × D 150
With cover: H 800 × W 540 × D 242
B Heat exchanger
DHW
2 Single check valve
7 Thermostatic valve
9 Strainer
B
31
74
Connections:
1 District heating (DH) supply
2 District heating (DH) return
3 Domestic cold water (DCW)
4 Domestic cold water (DCW)
5 Domestic hot water (DHW)
6 Heating (HE) supply
7 Heating (HE) return
Connections sizes:
DH + FH + HE: G ¾” (int. thread)
DCW + DHW: G ¾” (int. thread)
7
10 Circulator pump
14 Sensor pocket, enrgy meter
18 Thermometer
31 Differential pressure controller
41A Fitting piece, cold water mains 3/4” x 80 mm
41B Fitting piece, energy meter 3/4” x 110 mm
74 IHPT
39 Connection closed
63 Sieve
10 18
2
HE
supply
HE
return
Options:
• Mounting rail with ball valves
• White-lacquered stainless steel cover (built
in)
• White-lacquered stainless steel cover (on the
wall)
• Safety valve and non-return valve
(10 bar)
• Safety valve with thermostatic circulation
set
• Thermostatic circulation set
• Pressure compensation valve (GTU)
• Room thermostat
• Zone valve with actuator
• Air screw (DH supply)
• Return temperature limiter
• Connection for hot water circulation
• Hot water circulation pump
• Thermometer
• Ball valves
CAPACITY, WEIGHT AND DIMENSIONS
DHW: CAPACITY EXAMPLES
Substation
type
VMTD-F MIX-I 1
VMTD-F MIX-I 2
DHW
Capacity
kW
32,3 60 19 10/45 22 13, 3
40,3 60 20 10/45 32 16, 6
36,5 70 18 10/50 20 13,2
55 70 21 10/50 39 19,8
32,3 55 19 10/45 22 13,3
38 55 20 10/45 30 15,7
32,3 60 16 10/45 18 13 ,3
47 60 18 10/45 32 19,4
39,5 70 16 10/50 20 14,3
59 70 19 10/50 33 21,3
Supply flow
Primary
°C
Return flow
Primary
°C
DHW
°C
Pressure loss
Primary
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-SRMT/ PL | 2016 . 12
kPa
DHW
Tap lo ad
l/min
VL.HE.C3.02
Loading...