Danfoss MAKE UP LINE Fact sheet

Fact Sheet

MAKE UP LINE Substations

A high performance system for make up, connecting to the secondary side of heating circuits

FEATURES AND BENEFITS

• Protection of the heating circuit at overpressure

• Pressure maintaining in heating system in very strict limits

• Controlled lling up of atmospheric tank and of the heating circuit

• Short delivery time, easy to install, minimal location site

Application

The Make Up Line is a range of systems mounted on the secondary side (on the interior building circuit) of district heating systems or thermal plants with maximum temperature of 115 °C and PN 6 / PN 10. This system is suitable for maintaining between an overpressure given by water dilatation and an under pressure limit given by loses of water from dierent reasons in secondary heating circuit. The dimensioning of components in size and type is done with a calculation method developed by Schmidt-Bretten, member of Danfoss Group.

Function

The Make Up system has the function to discharge the soft water into an atmospheric tank via pressure relief valve(s) if the heating circuit develops a pressure value over the maximum set value or has the function to ll up the heating installation circuit via Make Up pump(s) if the pressure decreases below the minimum set value. The volume of lling up water or the leakage water from heating circuit is automatically replaced in water tank via solenoid valve.

Also, the system is able to protect the pump in case of water lack, can assure a sequential start of pumps, is able to stop functioning pumps in case of pipe breaking, can make automate switching on the second pump in case of failure function of the rst, assures the permanent monitoring of the water level in the atmospheric tank (minimum, normal and maximum) and assures the ltering of water.

The entire system has an electric and control panel connected to a pressure sensor and two level switches, and function of received values commands the excess pressure valve(s), the pump(s) or the solenoid valve opening/ closing.

Models

The Make Up system is available for a wide range of standardized heating capacities between 500 kW and 8000 kW and for static pressures between 15 mwc and 60 mwc.

It has to be emphasized that this system is designed as an ecient two in one pressure controller where control is made automatic.

For all usually requests and for the easier way of choosing the adequate equipment, our specialists come with standard solutions as shown in the examples of the Make Up standard range table. Although, other tailored made equipment may be available on demand.

Construction and installation

The pressure sensor, the closed pressure vessel, the level switches and manometers are standard given for all Make Up usually models. The pumps are made of stainless steel. The atmospheric tank is made of steel. The system equipment as valves, check valves, strainers are made of brass. The pipes of the system are made of steel. The connections are made by ange with gaskets, external and internal thread according to diameter. In the construction can be integrated optional modules for communications via standardized RS485.

The MAKE UP LINE is delivered as aunitary system, ready to be installed.

districtenergy.danfoss.com

VD1

V1.1

VD2

PA1

V1.2

CV1

VTM

V2.1

V2.2

CV2

PA2 WTL

EVM

ELP

800 mm

ELP

PA1

VTM

VD1

CIRCUIT DIAGRAM – EXAMPLE OF MAKE UP SYSTEM

R1 (R2): heating installation connection

Technical parameters:

Nominal pressure: PN 6 / PN 10 Maximum temperature: T

=115 °C

max

Make up source

Supply temperature: T Nominal pressure: PN 6 / PN 10

max

= 80 °C

Electrical supply: 3~400 V /50Hz

PA1 (PA2) Make Up pump – one or two pieces VD1 (VD2) Pressure relief valve (pressure relief controller) – one or two pieces EVM Solenoid valve P Pressure sensor L Level switches ELP Electric and control panel V1 (V2) Shut o valve – pump circuit VA Shut o valve – ll-up circuit CV1 (CV2) Check valve FA Strainer M Manometer WT Atmospheric water tank VTM Closed pressure vessel (against pressure shocks)

R3: soft water connection

(R2): heating

installation connection

additional

MAKE UP LINE (EXAMPLES):

Substation

type

EXP 203 2200 2 25 2 × 0,55 1 × 1000 EXP 405 4200 5 38 2 × 0,55 1 × 3500 EXP 805 6900 9 44 2 × 1,85 2 × 3000

SBT · Sos. Oltenitei no 208 · Popesti-Leordeni 077160 · Ilfov · România Tel.: +4031 222 20 10 · Fax: +4031 222 22 99 · secretariat@schmidt.ro · www.schmidt.ro

Heating capacity

[kW]

Flow rate / one pump

[m3/h]

Static pressure

[mwc]

Electrical power

[kW]

Expansion tank pieces ×

volume, liters

VL.EH.E2.02