To maintain the minimum return temperature and the maximum flow/return ∆T within the allowed limits, a recirculation system is installed between the flow and return connections which recirculates a suitable water flow rate in order to raise the return temperature before it goes into the boiler. The system is supplied hydraulically and electrically mounted on top of the boiler as an integral part of it. Connecting pipework with suitable supports and electrical wiring are included. Boilers that can be matched ASX – ASGX EN – TNX / EN – TNOX / EN – TNOX.e / EN

Control panel with 15” touch screen for a personalised view of the heating plant room (synoptic diagram). The panel must be connected via bus to the boiler Eterm control panels and to Nereix devices (plant and/flat metering devices) From the graphic panel it is possible to: – view the instantaneous values of temperature, operating status, modulation percentage values, alarms, etc. – send starting, stopping, forcing, setpoint and other types of commands – view graphs of the saved variables – export images of the graphs and Excel tables of the log data – view the alarm log The ModBus RS485 port (2 wires) is available for only one of the following options: 1- ModBus Master ModBus slave device management, i.e. the ability to manage other devices featuring the same interface from the graphic page. (ICI Caldaie reserves the right to check the compatibility of the devices) 2-ModBus Slave Conversion of all eterm parameters, both in reading and in writing mode, in ModBus protocol for external supervision systems provided with such interface. The maximum number of parameters that can be provided is 500 and they can be chosen by the customer based on the system. The control panel is provided with a device for Internet connection: the type of preferred connection determines the type of device installed inside the panel.

The structure consists of carbon steel profiles connected by special joints that ensure their correct coupling. The upper handrail parapet is suitably made and fixed by housings welded to the boiler structure to ensure perfect stability and solidity. The access ladder to the boiler platform is manufactured in compliance with the prevailing safety standards and is provided with: – handrail welded to the structure – skirting – structure to prevent falling from platforms higher than 3 metres – anti-slip inserts on the rungs -­ fall-prevention gate The gate is provided with spring-type hinges that keep it normally closed thus preventing any accidental fall towards the access ladder.

Water drops in the steam output of the boiler are a waste of energy for the plant and often cause damage to the production system that is using the steam. The Condensate Separator is specially designed, according to the PED European Directive 2014/68/EU, separate and remove entrained water droplets from the steam: this results in the availability of dry saturated steam and herefore in the increase of the efficiency of all systems. A steam trap is installed on the separator to discharge the condensate from the steam system.

Basamento accessoriato atto ad essere posizionato e fissato sul lato destro del generatore di vapore, e ad ospitare, oltre al quadro elettrico della caldaia (nr.2 quadri elettrici in caso di versione DUAL N) il proprio quadro elettrico per la gestione dei componenti, un addolcitore ed un vaso raccolta condensa/serbatoio di alimentazione dalle caratteristiche riportate di seguito. The softener is of the cabinet type with automatic regeneration control. The cylinder containing resin and brine tank are contained in a single appliance that also includes the mixing valve for residual hardness adjustment. The softener is complete with latest design electronic programmer, flow sensor and turbine flow meter that allow regeneration programming in time/volume mode (after reaching of set volume at fixed time), volume (immediately after achieving set volume), or time (with the possibility of programming the frequency of regeneration or fixed days of the week at predetermined time). Also, a programmed spontaneous regeneration regardless of the actual consumption of water is possible. You can still manually start the regeneration at any time regardless of the programming operations performed.

Thanks to this system, the level in the boiler is constantly adjusted by a PID regulator that controls the speed of the supply pump with inverter. The water flow rate is constantly asjusted to meet the steam demand thus avoiding cycles of steam production as can occur with on/off level controls, thereby ensuring a constant feed water flow to the boiler. It is necessary to use a modulating feed valve when an economiser is installed in order to ensure correct operation.

The backup pump is supplied to ensure the constant operation of the boiler, avoiding downtime in case of a main pump failure. The pump is installed in parallel to the service pump and it is controlled in the same way as the service pump. Both pumps, hydraulically connected to the same feed pipe, are equipped with a non-return valve and a shut-off valve dedicated to each pump to avoid the water flow towards the pump in stand-by conditions.

This system ensures that the level in the boiler does not exceed the allowed value thus avoiding flood problems. It consists of a “fail safe” probe connected to an electronic level relay with self-diagnosis feature, capable of indicating: – the presence of water above the set level; – the lack of insulation inside the probe; – faults inside the device (self-diagnosis); – interruption of the connection between the probe and the device in compliance with EN 12953-9 point 5.4.8. When it trips, the system triggers a visual and an acoustic alarm and stops the supply pump temporarily. The alarm is reset automatically once the level is again below the allowed maximum value. The system is supplied completely assembled to the boiler and tested. It complies with the main European Directives: – Low Voltage Directive 2014/35/EU – EMC Directive 2014/30/EU – PED Directive 2014/68/EU

To make sure that the boiler is working within the desired conductivity parameters, it is necessary to take water samples and analyse them. To take precise samples in a safe way it is essential to perform a proper cooling cycle in order to make any steam formed before the take-off point condense. The cooler reduces the water temperature up to 25°C, ready for immediate sampling.

The automatic bottom blowdown unit prevents unnecessary duplication or omission of blowdown that is possible with the manual system. This system allows sludge accumulated at the bottom of the boiler to be regularly and automatically removed through a cyclical opening in the blowdown valve. The blowdown intervals and duration must be set by the user based on the features of the boiler water as indicated in the boiler technical manual. The system requires compressed air availability.