Danfoss Termix VVX-I Fact sheet

Fact sheet

TermixVVX-Iwithcompleteinsulation

District heating substation for direct heating and instantaneous domestic hot water with flow-compensated temperature controller.

Application

The Termix VVX-I is a complete solution for hot water and space heating with optimal safety, efficient energy transfer, service-friendly construction and a compact design.The substation is used if a heat exchanger is required or on a conversion to district heating where the existing equipment is unsuitable for direct connection.

Districtheating(DH)

The substation is prefabricated with a differential pressure­ controller, fitting piece and sensor pockets forinsertionofanenergymeteraswellasstrainers.

Heating(HE)

The heating side consists of a plate heat exchanger, safety valve, manometer, drain valve, air valve, expansion vessel and circulation pump. The temperature of the heating can be controlled thermostatically or by an electronic controller with an outdoor temperature sensor. Depending on the application,differentheatexchangers dimensioned forcentralorfloorheating will be used.

Domestichotwater(DHW)

Thedomestichotwaterispreparedintheheat

exchangerandthetemperatureisregulatedwitha flow-compensated temperature controller with integrateddifferentialpressurecontroller.TheDHwater is cooled very efficiently by the heat exchanger, thereby creating an excellent operating economy. The Termix TPV valve ensures a stable hot water temperature by varying loads, supply temperaturesand byhighandvaryingdifferentialpressure withouttheneedforreadjustingthevalve.Thisprotects the heat exchanger against overheating and lime scale formation. Furthermore the Termix TPV valve has an integrated idle temperature controller, which keeps the house supply line warm. This shortensthewaitingperiodsduringsummerwhen the heating system is in reduced operation, which isidealwherehighcomfortisrequested.

Options

The Termix VVX-I can be supplied with a built-in safety valve mounted in the cold water supply. It canalsobesuppliedwithathermostaticcirculation valve.

Construction

All pipes are made of stainless steel. The

connectionsaremadebynutsandgaskets.

Insulation:

The Termix VVX-I 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 requiered.

FEATURES AND BENEFITS

•Substationforsingleandmulti-familyhouses

•Indirectheating,DHWtemperatureregulationwithathermostaticcontrolvalve

•Thermostaticorelectronicregulationofheating(HE) temperature

•Capacity:45kWheating,33-55kWDHW

•DHWinsufficientquantity

•Operatesindependentlyofdifferentialpressureandflow temperature

•Minimumspacerequiredforinstallation

•Pipesandplateheatexchangermadeofstainlesssteel

•Minimizedriskoflimescaleandbacteriaformation•

•OptimumtemperatureregulationuptoDHsupply temperature100°C

•Low heat loss

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CIRCUIT DIAGRAM - EXAMPLES

							A	Plate heat exchanger HE					26	Manometer
					1		B	Plate heat exchanger DHW					31	Differential pressure
DHW							1	Ball valve						controller
							2c	Non-return valve					38	Expansion vessel
							4	Safety valve					41	Fitting piece, energy meter
		21					7	Thermostatic valve					42	Safety valve/non-return
Circ.	2c						9	Strainer						valve
				B			10	Circulation pump					48	Air escape, manual
					74		14	Sensor pocket, heat meter					63	Sieve
	21						18	Thermometer					74	IHPT valve
							20	Filling/drain valve
	42
							21	To be ordered separately
DCW	63			1
						4 bar
DH	14	9			1	26	48	18			1		HE
supply													supply
						4			18			24
DH	41	14	31	1	7		10	48		38	1	9	HE
return					A		20						return

Technical parameters:				Connections:
Nominal pressure:		PN 10*		1 District heating (DH) supply
DH supply temperature:		Tmax	= 120°C	2 District heating (DH) return
DCW static pressure:		pmin	= 1 bar	3 Heating (HE) supply
Brazing material (HEX):		Copper		4 Heating (HE) return
* PN 16 versions are available on enquiry				5 Domestic hot water (DHW)
Weight incl. cover:	29 kg			6 Domestic cold water (DCW)
	(incl. packing)
Insulation:	Anthracity grey EPP
Dimensions (mm):
With insulation (mounted on wall variant):
H 800× W 530 × D 375

Connections sizes:

All connections: G ¾” (int. thread)

Options:

•Booster pump (increases DH flow)

•Separate mixing circuit

•Safety valve (10 bar)

•Pressure compensation valve (GTU)

•Electronic controller

•Room thermostat

•Connection for circulation

•On/off zone valve

DHW: Capacity examples							Heating: Capacity examples
Substation-	DHW	Supply/Re-		DHW Tap	Pressure			Heating	Supply/	Heating	Flow		Flow	Residual
	Capacity	turn flow	DHW °C		loss Primary		Substation-		Return		rate	dp min	rate sec-	pump
Type	kW	Primary °C		load l/h	kPa*		Type	Capacity	flow pri-	Circuit	primary	kPa	ondary	head
								kW	mary °C	°C	l/h		l/h	kPa
	32.3	60/19.8	10/45	23	23
							VVX-I x-1	12	70/40	60/35	353	30	418	31
	40.3	60/20.7	10/45	33	33
	36.5	70/19.1	10/50	20	20			24	90/45	70/40	470	45	699	19
VVX-I 1								19	70/40	60/35	553	30	662	52
	55	70/21.5	10/50	39	39		VVX-I x-2
								35	90/45	70/40	674	45	1019	30
	32.3	55/21.9	10/45	26	26
								31	70/40	60/35	906	30	1080	41
	38	55/22.2	10/45	34	34		VVX-I x-3
								50	90/45	70/40	956	45	1455	25
	32.3	60/19.6	10/45	20	20
	47	60/19.6	10/45	34	34
VVX-I-2	39.5	70/19	10/50	20	20
	59	70	10/50	34	34
*Heat meter not included

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

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice.This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary eady agreed.

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© Danfoss | DHS-SRMT/ PL | 2016. 12

VL.HE.M2.02