Danfoss VX Solo HWS Fact sheet

VX Solo HWS

Indirect substation for one-family houses, semi-detached and terraced houses as well as apartments.

Wall mounted district heating substation for indirect heating. With connection for domestic hot water cylinder on the secondary side.

Application

The VX Solo HWS is a substation featuring high performance and simple operation. The VX Solo HWS is especially suitable for two-pipe systems for heating and DHW connection on the secondary side.

District heating (DH)

The substation is prefabricated with interconnecting components such as differential pressure control, fitting piece and sensor pockets for insertion of a heat meter, as well as strainer, ball valves and pockets for pressure gauges.

Control

The optional TP9000 controller, which must be placed in a reference room, allows heating and DHW operation according to demand. The integrated room thermostat will open/close a zone valve for heating operation, and

the DHW sensor in the cylinder or the DHW timer will open/close a zone valve for DHW operation.

Heating (HE)

The heating side consists of a stainless steel plate heat exchanger, safety valves, manometer, air valve, expansion vessel and circulation pump. The secondary flow temperature is controlled thermostatically. Depending on substation’s application different heat exchangers dimensioned for central heating can be used.

Domestic hot water (DHW)

The substation is supplied with connection pipes for cylinder on the secondary side. Control valves and DHW cylinder sensor is included.

Construction

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

and gaskets. The VX Solo HWS can be delivered with white-lacquered steel cover.

FEATURES AND BENEFITS

•Substation for district heating for onefamily houses and apartments

•Indirectheating, connectionpipesfor

DHW cylinder on secondary side

•Thermostatic regulation of secondary flow temperature

•Capacity: 19/25kW heating

•Minimum space requiredfor installation

•Pipes and plate heatexchanger made of stainless steel

VL.HE.Q1.12 © Danfoss 05/2013

VX Solo HWS

Circuit diagram
		1 Plate heat exchanger HE		14	Pockets for pressure gauge 1/4”
		4	Differential pressure controller	15	Manometer
		5	Strainer	16	Expansion vessel 12 L
Cylinder		8	Circulation pump HE	17	Air valve
		11 Safety valve HE		19	Tapping point / Fill valve
	Cylinder	13 Thermometer		23	Sensor pocket ½”
				24	Fitting piece for heat meter
	Supply
					3/4” x 110 mm
		Top
	Common			30	Thermostatic valve AVTB
				52	Zone valve VMT/TWA-V
	Return		Terminal Box	60	Terminal box
Radiator return
	DH				HE
	Supply
					Supply
		Top			Bottom
	DH
	Return

Technical parameters:		Connections:
Nominal pressure:	PN 10/10
DH supply temperature:	Tmax = 110 °C	1	Cylinder (DHW) supply
DH differential pressure:	See capacity examples	2	Common return
Weight incl. cover:		3	District heating (DH) return
	42.0 kg	4	District heating (DH) supply
	(incl. packing)	5	Heating (HE) supply
Cover:	White-lacquered	Options:
	steel sheet	•	Energy meter
Electrical supply:		•	HE/DHW controllerTP9000
	230V AC	•	DHW sensor
Dimensions (mm):		•	Ball valves
		•	PN 16
Without cover:	H 850 xW 560 xW 350	•	White-lacquered steel sheet cover
With cover:	H 1000 xW 600 x D 400

Connections sizes:
DH:	G ¾”(int. thread)
HE:	G ¾”(int. thread)
Cylinder:	G ¾”(int. thread)

Wall

Top view

Heating: Capacity examples

		Plate heat ex-	Heating circuit	Heating circuit	Pressure loss				Available pump
	Heating Capacity								head
			Prim.	Sec.	Prim.	Flow rate prim.	Flow rate sec.	Pump
		changer							secondary
	kW		°C	°C	*bar	l/h	l/h
									bar
	19	XB06H-1 26	70/40	30/60	0.30	488	545	UPS 15-60	0.37
	19	XB06H-1 26	90/55	50/80	0.27	467	545	UPS 15-60	0.37
	25	XB06H-1 40	70/40	30/60	0.45	616	717	UPS 15-60	0.33
	25	XB06H-1 40	90/55	50/80	0.45	599	717	UPS 15-60	0.33

* Heat meter not incl.

Danfoss Randall Ltd. · District Energy · Ampthill Road · DK-Bedford MK42 9ER

Tel. [phone] · Fax: [phone] · [e-mail] · www.danfoss-randall.co.dk

VL.HE.Q1.02 © Danfoss 05/2013

DKDHR