Danfoss H 228/328 Fact sheet

Fact sheet

H 228/328

District heating substation for large properties

Application

The H 228/328 is made in a compact design and is especially suitable for supply of heating for large properties and apartment houses. The substation is suitable for two pipe systems.

The substation features a plate heat exchanger for the heating circuit and it is prepared for connection to a domestic hot water cylinder.

The H 228/328 is available in two basic variants, - one variant with Danfoss ECL 210 or 310 and motorized control valve for control of the heating circuit and another variant with Danfoss ECL 210 or 310 and motorized control valves for control of both the heating circuit as well as the DHW cylinder circuit.

The H 228/328 variants offer capacities ranging from 44 to 170 kW heating and 13 to 100 kW domestic hot water. Please contact our sales department and together we shall find the optimum solution for your exact requirements.

Construction

The H 228/328 is supplied with a brazed plate heat exchanger for heating, electronic actuator()s and valve(s), safety valves, pump, shut-off valves, manoand thermometers, strainers, sensor pockets, differential pressure controller as well as connection pipes for DHW cylinder. Actuator(s) and pump(s) are electrically wired from factory and supplied with CEE plug for connection to 220 V.

The electronic control ECL 310 is prepared for WebAccess, which enables remote con -trol and remote monitoring via the internet/ intranet.

Thesubstationsaredeliveredpreassem-bled, electrically wired internally and the electronic control is tested for function and preset from factory. The substation can be supplied with fitting piece for heat meter in the district heating supply and return pipe (to be specified when ordering).

Design

The H 228/328 is designed for wall-moun- ting and during the construction much importance has been attached to a clear and user-friendly placement of all components.

The H 228/328 is built on a frame of galvanized iron and offers variable connection possibilities, as connection of pipes can be established both in the top or in the bottom (standard) of the substation. The H 228/328 can be supplied with a white-lacquered steel cover with door, which enables easy access for meter reading and service purposes.

Connection pipes for domestic hot water cylinder (DHW)

As standard the H 228/328 is supplied with primary connection pipes for DHW cylinder, with or without motorized control valve and electronic control of the cylinder circuit.

FEATURES AND BENEFITS

•District heating substation for indirect heating

•Connection pipes for DHW cylinder

•Supplied with Danfoss ECL 210 or 310 controller

•Equipped with A-labelled low-energy pump

•Pipes and heat exchanger in stainless steel

•Minimized risk of lime scale and bacteria formation

•The substation is very service-friendly due to practical piping and assembly with nuts and gaskets

•Excellent operating economy

Heat exchanger for DHW heating

The heat exchanger used in the H 228/328 is a brazed, highly efficient Danfoss plate heat exchanger, which has been tested and approved according to the PED-directive.

Reading and setting

All thermometers are placed so they are easy to read. Components, which can be adjusted, are easily accessible.

Service og maintenance

The substation is very service-friendly due to practical piping and assembly with nuts and gaskets. It is mounted on the wall and as all pipes are placed in pipe bracket distance, it is possible to establish a nice piping.

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	CIRCUIT DIAGRAM – EXAMPLE - H 228 / 328 WITH ECL 310, A266
	P, M and S refer to	1	Plate heat exchanger HE	15	Manometer
	the Danfoss ECL
		4	Differential pressure controller	17	Air valve
	instruction manual
		5	Strainer	19	Drain valve/connection for
		6	Non-return valve		expansion vessel
		7	Ball valve	23	Sensor pocket for heat meter
		8	Pump HE		(optional)
		9	Connection for pump (circ.)	24	Fitting piece for heat meter
	Cylinder	11	Safety valve, HE	25	(optional)
	Supply	13	Thermometer		Controller Danfoss ECL310/A266
		14	Manometer w/shut-off valve	26	Outdoor sensor
	Cylinder			27	Sensor forward/return
	Return			28	Sensor, DHW
				29	Actuator 2
				30	Valve 2
	DH		HE	31	Actuator 1
	Supply		Supply	32	Valve 1

DH	HE
Return	Return

Design specifications:

Nominal pressure (prim/sec): PN 16 / PN 10

Max. supply temperature.:	120 °C
Min. ΔP:	0,75 bar incl. differential
	pressure controller
	(alternatively 0,5 bar)
Weight:	Max. 90 kg
Colour (cover):	White RAL 9010
Electrical supply:	220V AC
Dimensions (mm):
Without cover:	H 1350 xW max. 917 x D 380
With cover:	H 1350 xW 1030 x D 420

Connections:
1. DH supply	4. HE return
2. DH return	5.	Cylinder supply
3. HE supply	6.	Cylinder return
Connections sizes:
DH, HE:	G 1“ or 5/4” (int. thread)
Cylinder:	G 1“ or 5/4” (int. thread)

Heating and DHW capacity examples

Contact your local Danfoss sales representative for capacity examples

© Danfoss | DHS-SRMT/ PL | 2018 . 04

VL.IE.M2.02