Descriptions for tender

The following is suggested descriptions for use in tender material. The majority hereof may be copied verbatim; wherever the text is red, consultant must supply information or make a choice.


District heating

Leakage protection system that monitors flow difference at the specified point in the installation, and issues an alarm and cuts off the protected installation when the flow difference becomes unacceptable. Further, using periodic asymmetric cut-off, the leakage protection system must detect seepage and e.g. primary/secondary leakage in calorifiers, and likewise issue an alarm and possibly cut-off the installation.
The leakage protection system must perform continuous or intermittent self-testing of associated components.
The leakage protection system must feature an alarm relay output, and volume impulse outputs for BMS (submetering).
The system must be based on flow measurement using static flow meters.
The combined head loss of all components of the leakage protection system muts be no bigger than 1mWc (10 kPa) at Qmax=[fill in].

If a ventilation system draws outside air through a radiator fed by district heating, add
EITHER:
The leakage protection system must be supplied with an outdoor temperature sensor for blocking tightness test at low outdoor temperatures.
OR:
The leakage protection system must accept a signal from BMS for execution or blocking of tightness test.

Energy Readout
Specify whether readout of energy transport from the leakage detection system is required, and - if known - the type of data interface.

Propagation of alarms:

__ technical alarm via e.g. Burglar Alarm or Fire Alarm
__ via BMS to duty phone
__ as text message via GSM to mobile duty phone
__ other: _________________________


Cooling water

Leakage protection system that monitors flow difference at the specified point in the installation, and issues an alarm and cuts off the protected installation when the flow difference becomes unacceptable.
The leakage protection system must perform continuous or intermittent self-testing of associated components.
The leakage protection system must feature an alarm relay output, and volume impulse outputs for BMS (submetering).
The system must be based on flow measurement using static flow meters.
Cooling installation Qmax=[fill in].
Caution! If the cooling medium is not pure water, all additives must be listed and their concentration specified!

Propagation of alarms:

__ technical alarm via e.g. Burglar Alarm or Fire Alarm
__ via BMS to duty phone
__ as text message via GSM to mobile duty phone
__ other: _________________________


Supply Water
Commercial
general

Leakage protection system that monitors water usage at the specified points in the installation [list], and issues an alarm and cuts off the relevant protected installation when consumption becomes unacceptable.
The leakage protection system must permit monitoring with different sensitivities depending on time-of-day or an external control signal from BMS, burglar alarm, or other source.
The leakage protection system must allow override (force open) of the cut-off valve from a fire alarm system and any fire hose cabinets fed from the protected installation.
The leakage control system must feature a run-in facility for use in the event of permanent changes in consumption.
The leakage protection system must perform continuous or intermittent self-testing of associated components.
The leakage protection system must feature an alarm relay output, and volume impulse outputs for BMS (submetering).
For supply water, potable and pressurized water, the system must be based on flow measurement using static flow meters.
Qd=[specify for each channel/branch].
The number of attached fire hoses must be specified for each channel/branch.
Branches that contain attached fire hoses must have their cut-off valve specified SRNO.
The nature of the water must be specified for each branch.

Propagation of alarms:

__ technical alarm via e.g. Burglar Alarm or Fire Alarm
__ via BMS to duty phone
__ as text message via GSM to mobile duty phone
__ other: _________________________


Supply Water
Small Institutions,
Village Halls etc.

Leakage protection system that monitors water usage in the water main DN [fill in], and issues an alarm and cuts off the installation when consumption becomes unacceptable.
The leakage protection system must permit monitoring with different sensitivities depending on an external control signal from a burglar alarm or attached PIR sensors.
The leakage protection system must allow override (force open) of the cut-off valve from a fire alarm system and any fire hose cabinets fed from the protected installation.
The leakage control system must feature a run-in facility for use in the event of permanent changes in consumption.
The leakage protection system must perform continuous or intermittent self-testing of associated components.
The leakage protection system must feature an alarm relay output, and volume impulse outputs for BMS (submetering).
The system must be based on flow measurement using a static flow meter.
The installation's Qd=[specify].
The number of fire cabinets must be specified.
If nonzero, the cut-off valve must be specified SRNO.

Propagation of alarms:

__ technical alarm via e.g. Burglar Alarm or Fire Alarm
__ via BMS to duty phone
__ as text message via GSM to mobile duty phone
__ other: _________________________


Supply Water
Holiday and Rental Homes

Leakage protection system that monitors water usage in the water main DN [fill in], and issues an alarm and cuts off the installation when consumption becomes unacceptable.
The leakage protection system must permit monitoring with different sensitivities depending on an external control signal from attached PIR sensors situated to cover the taps of the property.
The leakage protection system must perform continuous or intermittent self-testing of associated components.
The leakage protection system must feature an alarm relay output for attachment to an SMS alarm transmitter
The system must be based on flow measurement using a static flow meter.
The installation's Qd=[specify].

Propagation of alarms:

__ technical alarm via e.g. Burglar Alarm or Fire Alarm
__ via BMS to duty phone
__ as text message via GSM to mobile duty phone
__ other: _________________________


Water Aggregation
Riser Shafts

Fail-safe, stand-along monitoring system for water aggregation in difficult-to-inspect and/or infrequently visited locations, such as riser shafts and basement floor drains, which alarms out visibly and audibly as well as by alarm relay in the event of water aggregation by the sensor electrodes.
The system must be fail-safe so that it reports power supply, sensor and cable failures.
The sensor electrodes must be protected from galvanic corrosion by the use of an AC measuring current, and from chemical corrosion by gold plating of the sensor electrodes.
The system must have an uncommitted alarm relay output for the attachment of an SMS alarm transmitter.

Propagation of alarms:

__ technical alarm via e.g. Burglar Alarm or Fire Alarm
__ via BMS to duty phone
__ as text message via GSM to mobile duty phone
__ other: _________________________