Fact sheet
HW 235/335 - 242/342
District heating substation for large properties
Application
The HW 235/335 - 242/342 is made in a compact design and is especially suitable for supply of heating and domestic hot water for large properties and apartment houses comprising more than 25 apartments. The HW 235/335 - 242/342 is available with Danfoss ECL 210 or 310 for control of both the heating circuit and the domestic hot water circuit. The HW 235/335 - 242/342 variants offer capacities ranging from 44 to 385 kW heating (27 to 138 kW for one pipe systems) and 40 to 300 kW domestic hot water. Please contact our sales department and together we shall find the optimum solution for your exact requirements.
Construction
The HW 235/335 - 242/342 is supplied with a brazed plate heat exchanger for heating and domestic hot water production, electronic actuators, shut-off valves, non-return and safety valves, A-labelled low-energy pumps for heating and DHW recirculation, manoand thermometers, strainers, sensor pockets as well as differential pressure controller. Actuators and pumps 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 control and remote monitoring via the internet/intranet.
Thesubstationsaredeliveredpreassem-bled, electrically wired internally and the electro
nic 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 HW 235/335 - 242/342 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 HW 235/335 - 242/342 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 HW 235/335 - 242/342 can be supplied with a white-lacquered steel cover with two detachable front pieces, which enables easy access for meter reading and service purposes.
Domestic hot water recirculation
As standard the HW 235/335 - 242/342 is supplied with a low-energy pump for domestic hot water recirculation and can easily be connected to existing systems with DHW recirculation. On new constructions it is recommended to establish domestic hot water recirculation, which ensures that hot water is produced immediately, when tapping starts. This ensures maximum DHW comfort og eliminates water wastage.
FEATURES AND BENEFITS
•District heating substation for indirect heating and domestic hot water
•DHW heating based on the flow principle
•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
If the HW 235/335 - 242/342 is connected to a system without recirculation, internal circulation must be established to prevent calcification.
Heat exchangers for DHW heating
The heat exchangers used in the HW 235/335242/342 are brazed, highly efficient Danfoss plate heat exchanger, which has been tested and approved according to the PED-directive.
Meter reading and setting
The heat meter can be placed in the front part of the substation, easily readable. 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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