Danfoss VX-F Fact sheet

Fact Sheet

VX-F flat station for indirect heating and DHW

District heating substation for indirect heating and instantaneous domestic hot water. For apartments, singleand multi-family houses

Application

Die VX-F is a compact substation featuring high performance and simple operation. The VX-F is especially suitable for two-pipe systems and systems with radiator or floor heating, supplied from a secondary connected district heating system, a block heating system or a centrally located boiler system in a block of flats.

The VX-F range is available as built-in variant with a recess box in sizes W 690 x H 1350 x D 150 and W 850 x H 1350 x D 150 or as wall-mounted variant.

The VX-F stations are prepared for mounting separately or for implemetation with with a VX-F distribution unit with 3 to 12 heating circuits.

District heating (DH)

The flat station is prefabricated with interconnecting components such as differential pressure controller, strainer, thermal bypass and fitting piece and sensor pockets for insertion of a heat meter.

Heating (HE)

The heating side consists of plate heat exchanger, safety valve, manometer, expansion vessel and A-labelled low-energy circulation pump. A flow temperature controller, type FTC is used for flow temperature control of the heating system. The VX-F stations are equipped differently depending on the application, - floor heating or radiator heating. VX-F stations for floor heating are equipped with a safety thermostat and a zone valve RA-C / thermal actuatorTWA to prevent overheating.

Domestic hot water (DHW

The domestic hot water is prepared in the heat exchanger based on the flow principle and the temperature is regulated by the self-acting controller with in-

tegrated differential pressure controller - the PTC2+P with energy-saving function. Supreme ease of operation is obtained via the combined hydraulic and thermostatic regulation of the PTC2+P controller. The pressure-controlled part allows primary and secondary side flow through the heat exchanger, only when hot water is tapped and blocks the flow immediately after completion of the tapping process.

The thermostatic part controls the domestic hot water temperature. Thanks to the quick-acting hydraulic control of the heat exchanger, it is largely protected from the formation of lime scale and growth of bacteria.

The PTC2+P controller with integrated differential pressure controller compensates for variations in supply temperature and varying differential pressure and thereby ensures a constant domestic hot water temperature at all times. A thermostatic bypass enables tapping of hot water without any delay, – ensuring the best possible efficiency and economy. For registration of the cold water consumption the VX-F is equipped with a fitting piece for mounting of a cold water meter in the DCW inlet.

Options

The VX-F is equipped with bypass function as a standard, but it is prepared for DHW circulation. Equipment for DHW circulation is optional and must be ordered separately.

Design

All pipes are made of stainless steel. The connections are made by nuts and gaskets. The Akva Lux II can be delivered with white-lacquered steel cover for recess mounting or for wall mounting. The VX-F is supplied without recess box and door as standard. - This is optional must be ordered separately.

FEATURESANDBENEFITS

••Indirectheating,DHWheatingbasedon flowprinciple

••Innovative,energy-savingcontroller PTC2+Pincombinationwithhigh performanceheatexchangerforon- demandwaterheatingwithoutno-load lossesfunction

••Thermostaticcontrolofheating(HE) temperature

••Capacity:15kW HE/37-55kW DHW

••Minimumspacerequiredforinstallation

••Formountinginrecessboxoronthewall

••Pipesandheatexchangermadeof stainlesssteel

••Minimizedriskoflimescale and bacteria formation

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CIRCUITSHALTPLANDIAGRAMBEISPIELEXAMPLE - Variant with floor heating and circulation

	1	Plate heat exchanger HE	29	Actuator TWA
	2	Plate heat exchanger DHW	30	Thermostat FTC/RAC
	4	Differential pressure controller	33	Blind plate
	5	Strainer	38	PTC2 controller
	6	Non-retur valve	40 Danfoss FJVR for bypass/circulation
	7	Ball valve	52	Zone valve RA-C
	8	Circulation pump HE 230 V	57	Safety thermostat ST55
	9	Circulation pump DHW
	11	Safety vale HE 3 bar ½”
DHW	12	Safety valve DHW 10 bar ½”
	15	Manometer
	16	Expansion vessel 10 L
	17	Air vent
	19	Fill / Drain valve
DCW	23	Sensor pocket for heat meter ½”
	24	Fitting piece for heat meter 3/4” x 110 mm
DCW				HE
	Circulation set 145H3985			Supply
DHW circ.
	Circ.
DH				Floor heating
Supply				Supply
DH				Floor heating
Return				Return
				HE
				Return

Design specifications:			Dimensional sketch:
Nominal pressure (prim/sec.):PN 16
Max. suppy temperature:	100 °C (design temp.)
Min. ΔP:	See capacity examples
DCW static pressure:	pmin = 2 bar
Brazing material (HEX):	Copper
Weight w/o cover.:	Max. 30 kg
(incl. packing)
Dimensions (mm):	H  945 × W 561 × D  150
Electrical supply:	230 V AC
Recirculation:
Remember to order circulation set for systems that
feature DHW recirculation.
			Connection sizes:
			DH:	G ¾“ (ET)
			DCW, DHW, HE:	G ¾“ (ET)
			Circulation:	R ½“ (IT)

Connections:

1. Domestic cold water (DCW)

2. Domestic hot water (DCW)

3. Domestic hot water (DCW)

4. District heating (DH) Supply

5. District heating (DH) Return

6. Heating (HE) Supply

7. Heating (HE) Return

Accessories and options:
Recess box B690 x H1350 x D150 mm:	145H4044
Door for 145H4044 incl. of mounting rail:	145H4104
Recess box B850 x H1350 x D150 mm:	145H4105
Door for 145H4105 incl. of mounting rail:	145H4106
Circulation set:	145H3985
Mounting feet for recess box (2 pcs.)	145H4232
Mounting rail incl. of ball valves	145H4195

Variants:

145F3900: VX-F Floor heating w/zone valve, ST55 145F3901: VX-F Floor heating w/zone valve, ST55, circ. 145F3902: VX-F radiator heating w/RA-C/FTC 145F3903: VX-F radiator heating w/RA-C/FTC, circ.

DHW: Capacity examples, 10 °C/50 °C

	DHW	Temp.	Temp.	Pressure	Flow rate	Flow rate
Type	Capacity	primary	sekundary	loss	primary	secundary
	kW	[°C]	[°C]	*primary	[l/h]	[l/min]
XB 06H+-1 40	37	60/18.22	10/50	27	762,5	13,26
XB 06H+-1 40	45	60/18.91	10/50	40	942,9	16,13
XB 06H+-1 40	55	60/19.77	10/50	59	1177,1	19.70

* heat meter not incl.

Heating: Capacity examples

	Heating	Temp.	Temp.	Pressure	Flow rate	Flow rate	Pressure
Type	Capacity	primary	sekundary	loss *prim.	primary	primary	loss *sec.
	kW	[° C]	° C]	[kPa]	[l/h]	[l/h]	[kPa]
XB 06H-1 16	10	70/40,35	35/60	38	287,4	346,8	5
XB 06H-1 16	10	60/30,75	30/40	62	294,4	865,2	27

* heat meter not incl.

Danfoss Redan A/S · District Heating · Omega 7, Søften · DK-8382 Hinnerup · Denmark Tel.: [phone] · Fax: [phone] · [e-mail] · www.redan.danfoss.dk

© Danfoss | Produced by Danfoss Redan | 2016.12

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