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.
www.danfoss.com
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 |