Danfoss VMTD-F-I PTCII P Fact sheet

Fact sheet

Termix VMTD-F-I PTCII+P with complete insulation

Direct substation for flats and single family houses

Application

The Termix VMTD-F-I PTCII+P is a com­plete solution with a built-in water heat­er and a differential pressure controlled
heating system. Termix VMTD-F-I PTCII+P
is applicable for single family houses and
for decentralized systems.

District heating (DH)

The substation is prefabricated with a dif­ferential pressure controller, a fitting piece
and a sensor pocket for insertion of a heat
meter as well as strainer and ball valves. The
display of the heat meter is to be mounted
next to the station.

Heating (HE)

The heating circuit is designed for direct
generation of heat. The differential pres­sure controller sets the optimum opera­tion conditions for radiator thermostatic
valves enabling individual temperature
control in each room. In order to enable
a time-depending 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 flow-compensated tempera­ture controller with integrated differential
pressure controller.

The DH water is cooled very efficiently by
the heat exchanger, thereby creating an
excellent operating economy. The Danfoss
PTCII+P valve ensures a stable domestic hot
water temperature by varying loads, var ying
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. A separate thermostat­ic bypass enables tapping of hot water with­out any delay, – ensuring the best possible
efficiency and economy.

Options

The Termix VMTD-F-I PTCII+P can be
supplied with a connection for DHW cir­culation. DHW circulation pump can be
ordered separately. (to be mounted un­derneath the station).

Construction

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

Insulation

The Termix VMTD-F-I PTCII+P comes
complete with a fully insulated cover thus
minimizing the heat loss both during tap­ping of domestic hot water but also when
only space heating is required.

FEATURES AND BENEFITS

• Substation for DH and
decentralized systems

• Direct heating with differential
pressure controller

• DHW flow-compensated
temperature controller

• Capacity: 33 – 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

• Optimum temperature regulation up
to DH supply temperature 100 °C

• Low heat loss

www.danfoss.com

CIRCUIT DIAGRAM

DHW

DCW

CWM

B Heat exchanger
2 Single check valve
7A FJVR Return temperature limiter
9 Strainer
14 Sensor pocket, energy meter
31 Differential pressure controller
39 Connection closed
41A Fitting piece, Cold water mains ¾” × 80 mm
41B Fitting piece, energy meter ¾” × 110 mm
48 Air vent, manual
63 Sieve
69A On / Off valve without actuator
75 PTC2+P

DH

Supply

DH

Return

Technical parameters:

Nominal pressure: PN 10
DH supply temperature: Tmax = 120 °C
DCW static pressure: Pmin = 1 bar
Brazing material (HEX): Copper

Weight incl. insulation: 20 kg
(incl. packing)

Insulation cover: Anthracite grey
EPP

Dimensions (mm):

Without cover (including ball valves):
H 745 × W 528 × D 110 mm
With cover (mount on wall variant):
H 800 × W 540 × D 242 mm
With cover (built-in wall variant)
H 915–980 × W 610 × D 150 (110) mm

Connections:

1. District heating (DH) supply

2. District heating (DH) return

3. Cold water mains (CWM)

4. Domestic cold water (DCW)

5. Domestic hot water (DHW)

6. Heating (HE) supply

7. Heating (HE) return

Connections sizes:

DH + HE: G ¾” (int. thread)
DCW + DHW: G ¾” (int. thread)

Options:

• Mounting rail with ball valves

• Room thermostat

• Actuator for zone valve

• Connection for hot water circulation

• Hot water circulation pump
(mounted outside the unit)

• Ball valve set

DHW: CAPACITY EXAMPLES

Substation type

CAPACITY, WEIGHT AND DIMENSIONS

VMTD-F-I-1

VMTD-F-I-2

* Heat meter not incl.

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.: [phone] · Fax: [phone] · [e-mail] · www.heating.danfoss.com

HE
Supply

HE
Return

[ kPa* ]

DHW

tap load

[ l/min ]

© Danfoss | DHS-SRMT/ PL | 2016 . 05

VL.IQ.M2.02