Danfoss H 228/328 Fact sheet

Fact sheet

H 228/328

District heating substation for large properties

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

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, mano- and 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.
The substations are delivered preassem-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-moun­ting 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.

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
the Danfoss ECL
instruction manual

Cylinder
Supply

Cylinder
Return

DH
Supply

DH
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

1 Plate heat exchanger HE
4 Differential pressure controller
5 Strainer
6 Non-return valve
7 Ball valve
8 Pump HE
9 Connection for pump (circ.)
11 Safety valve, HE
13 Thermometer
14 Manometer w/shut-off valve

HE
Supply

HE
Return

15 Manometer
17 Air valve
19 Drain valve/connection for
expansion vessel
23 Sensor pocket for heat meter
(optional)
24 Fitting piece for heat meter
(optional)
25 Controller Danfoss ECL310/A266
26 Outdoor sensor
27 Sensor forward/return
28 Sensor, DHW
29 Actuator 2
30 Valve 2
31 Actuator 1
32 Valve 1

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)

Colour (cover): White RAL 9010

Electrical supply: 220 V AC

Dimensions (mm):

Without cover: H 1350 x W

max. 917 x D 380

With cover: H 1350 x W 1030 x D 420

CAPACITY, WEIGHT AND DIMENSIONS

Heating and DHW capacity examples

Contact your local Danfoss sales representative for capacity examples

HEATING: CAPACITY EXAMPLES

© Danfoss | DHS-SRMT/ PL | 2018 . 04

VL.IE.M2.02