DIATECH LF hydraulic interface unit
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Metering, heating and production of domestic hot water for condensation plants DESCRIPTION DIATECH LF is a hydraulic interface unit (HIU) for the management and direct calculation in centralised heating systems with instant production of domestic hot water by means of a plate heat exchanger. DIATECH LF is designed to maximize efficiency in plants equipped with a condensation generator. The installation can be wall-mounted, with or without a shell, or built-intowall with a template case. The plant connections are opposed: the upper ones towards the centralised system and the lower ones towards the housing unit. DIATECH LF is able to use the pre-heated domestic water coming from a solar heating system, supplying only the necessary amount of energy. • Domestic hot water production • Plants with condensation boilers • Management independence • Costs breakdown according to real consumptions • Total security • Energy saving HEATING OUTLET HEATING RETURN COLD NETWORK WATER DOMESTIC HOT WATER DOMESTIC TREATED WATER DOMESTIC HOT WATER RECIRCULATION DOMESTIC WATER SOFTENER HOUSING UNIT HEATING SYSTEM DOMESTIC UNITS THERMOSTATIC VALVE CONDENSING GENERATOR HOUSING UNIT ROOM THERMOSTAT DIATECH LF TECHNICAL ROOM

Manual shut-off valve (version with template housing) MID-approved impulsive volumetric domestic water meter * Pump unit (optional) MID-approved M-bus energy counter * Temperature probe for domestic hot water Flow meter Stainless steel braze welded plate exchanger Built-in check valve (optional) 2-way modulating SINTESI motorised valve, domestic water 2-way ON/OFF SINTESI motorised valve, heating Y-strainer Balance valve (static / dynamic / DPCV / electronic option) Control panel Domestic hot water recirculation pump (optional) UPPER CONNECTIONS Centralised system side Treated and/or...

LF FUNCTION HEATING FUNCTION: During heating operation, the control of the return temperature is entrusted to the thermostatic devices of the system: the DIATECH LF unit allows the fluid to be shut off by means of a 2-way ON/OFF SINTESI motorised valve controlled by a room thermostat (not included) and adjust the flow rate with the balance valve. Valves are available for static balance, dynamic balance and differential pressure control or electronic flow control (Modflow). DOMESTIC HOT WATER PRODUCTION: The DIATECH LF unit are equipped with a high-surface heat exchanger which, combined with...

LF TECHNICAL FEATURES ENERGY METER Type mechanical (1 ) Flow rate Qp 1,5 m3/h Minimum flow 0,015 m3/h Maximum flow 3,0 m3/h DN 15 PN 16 Power supply lithium battery Class protection IP54 Interface M-bus (2 ) Certification MID VOLUMETRIC METER FOR DOMESTIC WATER Type mechanical Permanent flow rate Q 1,5 m3/h Minimum flow 0,03 m3/h Maximum flow 3,0 m3/h DN 15 PN 16 Interface pulse output Certification MID MOTORISED VALVES Type ON/OFF (90°) heating - 15 sec Modulating type (90°) domestic - 15 sec DHW ELECTRONIC CONTROL SYSTEM Type PID algorithm Dead band ±1°C Display approximation 1°C...

FLOW REGULATOR RECIRCULATION SANITARY LINE PUMP WITH PUMP It keeps the recirculation ring warm in the housing unit TREATED WATER LINE DYNAMIC WITH REPLACEMENT STUB PIECE of the treated water meter DPCV INSTALLATION BASIC HANGING MODFLOW With shell PUMP It allows the relaunch of the primary fluid in the apartment without using the prevalence of the centralised plant pump STATIC BALANCING VALVE DYNAMIC BALANCING VALVE DIFFERENTIAL PRESSURE CONTROL VALVE (DPCV) ELECTRONIC FLOW CONTROL (MODFLOW) It allows the flow rates to be manually balanced using a calibrated knob until they reach the design...

LF VERSIONS AND CODE BUILDER LF E.g.: Wall-mounted DIATECH LF with shell and pump unit on primary circuit 0 DOMESTIC TREATED AND/OR PREHEATED LINE 0 = not required T = treated water meter replacement stub piece B = base (with no shell), optional template case W = wall-mounted with shell PUMP 0 P 8 9 not required pump unit on primary circuit sanitary recirculation pump unit on primary and domestic recirculation 0 = not required J = static balancing valve X = dynamic balancing valve D = differential Pressure Control Valve (DPCV) M = Modflow - electronic flow control INSTALLATION The DIATECH...

LF INSTALLATION WARNING It is advisable to use flexible hydraulic connection in order to compensate for any thermal expansion and possible misalignment between the system connections. WARRANTY AND FIRST START-UP The warranty becomes effective on the date of testing, if required, and shall last for 24 months. If testing is not required, the warranty will become effective on the date of purchase. M-BUS SYSTEM : M-bus data acquisition control unit : Control unit-PC connection : Control unit-modem connection : Concentrator nodes The M-bus system represents a cabled means of communication among...

LF OVERALL SIZE WALL-MOUNTED TEMPLATE CASE for FLUSH-MOUNTED version version with NO SHELL WALL-MOUNTED version with SHELL EXAMPLE OF SPECIFICATIONS DIATECH LF HYDRAULIC INTERFACE UNIT for the management and direct metering in centralised heating systems with instant production of domestic hot water by means of a plate heat exchanger. Domestic hot water production controlled by a pre-set three-action electronic regulation system (PID) and a motorised regulation valve on the primary circuit of the exchanger. Main components: • Replacement stub piece for domestic water meter • Replacement...