Danfoss Akva Vita TDP Shaft Fact sheet

Fact Sheet

Akva Vita TDP Shaft

Direct ﬂat station for mounting in shaft in a dwelling house

FEATURES AND BENEFITS

• Flat station for district heating

• Direct heating, DHW heating based on the ﬂow principle

• Capacity: 15 kW heating 35 kW domestic hot water

• Maximum hot-water comfort supply

• Minimum space required for installation

• Pipes and plate heat exchanger made of stainless steel

• Minimized risk of lime scale and bacteria formation

Application

The Akva Vita TDP Shaft is an instantaneous water heater featuring high performance and simple operation. The Shaft is developed for flat systems supplied from a scondary connected district heating system, a block heating system or a centrally located boiler system in a dwelling house.

District heating (DH)

The flat station is prefabricated with interconnecting components such as differential pressure control, upright positioned fitting piece for insertion of a heat meter and DCW meter, sensor pockets as well as strainer, thermometer

and ball valves.

Heating (HE)

The heating side is designed for direct ge-neration of heat in a 2-pipe system. The differential pressure control sets the optimum operation conditions for radiator thermostatic valves, in order to enable 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..

Akva Vita TDP

Domestic hot water (DHW)

The domestic hot water is prepared in the heat exchanger based on the flow principle. Supreme ease of operation is obtained via hydraulic regulation of the domestic hot water through a proportional valve - the PM controller, thereby guaranteeing a constant domestic water temperature at all times. The use of hydraulic regulation largely prevents the formation of lime scale and bacteria, due to the fact, that the valve closes immediately when tapping ends and thereby the heat exchanger is not constantly kept warm. A thermostatic by-pass enables tapping of hot water without any delay - ensuring the best possible efficiency and economy. The Akva Vita TDP Shaft is equipped with by-pass function as standard, but it is also prepared for DHW circulation. Switching to DHW circulation is possible from a constructional point of view, requiring no extra components.

Mounting

Please note the application-specific dimensions, which makes the Akva Vita TDP Shaft especially suitable for mounting in a technique shaft. Akva Vita TDP Shaft can be mounted directly on the wall or it can be mounted by use of the enclosed wall brackets. Mounting with wall brackets generates a distance of 100 mm between flat station and wall for the piping arrangements.

Construction

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

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CIRCUIT DIAGRAM – EXAMPLE

DHW

DCW

2 Plate heat exchanger DHW 4 Diﬀerential pressure controller 5 Strainer 7 Ball valve 13 Thermometer 17 Air valve 23 Sensor pocket for heat meter ½” 24 Fitting piece for heat meter ¾” x 110 mm 38 PM controller 40 Danfoss FJVR for by-pass/circulation 59 Fitting piece for DCW meter ¾” x 110 mm

DH Supply

DH Return

Technical parameters:

Nominal pressure: PN 10 DH supply temperature: T DCW static pressure: p Chloride compounds: Max. 300 mg/l

Weight incl. cover: 20,0 kg

(incl. packing)

Dimensions (mm):

= 100 °C

max

= 2,5 bar

min

H715 x W295 x D185

Pipes dimensions (mm):

Primary: Dia. 18 Secundary: Dia. 18

Connections sizes:

DH + DCW + DHW: G ¾” (IT) HE + optional circ.: G ¾” (IT)

(By-pass)

Connections:

A Domestic cold water (DCW) outlet B Domestic hot water (DHW) C Heating (HE) supply D Heating (HE) return E Domestic cold water (DCW) inlet F District heating (DH) supply G Circulation H District heating (DH) return

Top view

C D

G H

290

295

185

102

E F

70 70

HE Supply

HE Return

Options:

• Ball valve G ¾” (ext. thread)

• Ball valve with pocket for pressure for pressure/thermometer gauge G ¾” (ext. thread)

• Ball valve with pocket for pressure for pressure/thermometer gauge G ¾” (int. thread)

• Thermometer Ø35 mm

• Connection pipe for circulation

• Zone valve VMT 15/8 with TWA-V/230

V AC

• Room thermostat TP 7000

• Room thermostat TP 7000RF incl. RX-1

• Mounting of heat meter (supplied by customer)

* requires local approval

3535

DHW: CAPACITY EXAMPLES AT 10°C / 45°C

DHW

Capacity

[kW]

32,3 U141RH 55 22 13,16 0,23 840 32,3 U141RH 60 18 13,16 0,16 660 41,0 U141RH 60 20 16,86 0,24 880 53,0 U141RH 60 22 21,84 0,45 1200

*) Stated pressure loss values are complete, incl. pipes. heat exchanger and valves

Plate heat

exchanger

Supply flow

primary

[°C]

Return flow

primary

[°C]

DHW tap

load

[l/min]

Pressure loss

primary*

[bar]

Flow rate

primary

[l/h]

HEATING: CAPACITY EXAMPLES

Heating

Capacity

10 20 20 0,30 428 10 30 30 0,26 284 10 40 40 0,24 216 15 20 20 0,40 644 15 30 30 0,30 428 15 40 40 0,27 320

*heat meter not incl. and diﬀerential pressure controller set on 0,2 bar

Heating circuit, ∆t

Primary

°C

Secund

ary

°C

Pressure

loss

Primary

*bar

VL.KS.X2.02

Flow rate

Primary

l/h