IDEAL LOGIC HIU Direct MT Installation And Servicing Download Page 4 | Manualshive

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IDEAL LOGIC HIU Direct MT Installation And Servicing Download Page 4

INDIRECT

SPECIFICATION

4

LOGIC HIU

-

Installation & Servicing / Users

1 APPLIANCE TYPE

INDIRECT

LOGIC HIU INDIRECT 75

Indirect wall mounted HIU, with a 75kW instantaneous priority

DHW and 15 kW modulated CH. This can be converted to

under floor heating including inbuilt safety thermostat

capability.

LOGIC HIU INDIRECT 50

Indirect wall mounted HIU, with a 50kW instantaneous priority

DHW and 15 kW modulated CH. This can be converted to

under floor heating including inbuilt safety thermostat

capability.

Note: 75 Indirect unit is shown fitted with filling loop attached (See Frame 13)

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Summary of Contents for LOGIC HIU Direct MT

Page 1: ...sured conform to the safety and performance speci cation that we require Do not use reconditioned or copy parts that have not been clearly authorised by Ideal For the very latest copy of literature fo...

Page 2: ...control devices e g economisers etc are directly connected to these appliances unless covered by these Installation and Servicing Instructions or as otherwise recommended by Ideal Boilers in writing...

Page 3: ...IU to remove any particles rust incrustations lime scale welding slag and any other contaminants The water circuits must be clean and free from debris Make sure that all connection fittings are watert...

Page 4: ...modulated CH This can be converted to under floor heating including inbuilt safety thermostat capability LOGIC HIU INDIRECT 50 Indirect wall mounted HIU with a 50kW instantaneous priority DHW and 15...

Page 5: ...perature 42 to 60 C Domestic hot water 10 bar DHW circuit max flow rate 18 l m 0 3 l s Min flow rate to activate domestic flow sensor 2 7 l m 0 3 Max Differential pressure on domestic water modulating...

Page 6: ...meter when fitted 4 Primary filter and heat meter probe pocket 5 Heating circuit control valve 7 Modulating primary control valve DHW 8 Plate heat exchanger DHW 9 DHW temperature sensor 10 DHW flow sw...

Page 7: ...Servicing Users FLOW PATH Heating Primary Circuit 5 SCHEMATIC LOGIC HIU INDIRECT 75 LOGIC HIU INDIRECT 50 6 PRIMARY FLOW CHARACTERISTICS 7 PRIMARY FLOW CHARACTERISTICS FLOW PATH DHW Primary Circuit RE...

Page 8: ...1 0 3 0 4 0 5 0 6 3 2 1 RES ET ON DH W C H FAULT 1 2 5 5 C 65 C 5 5 C 85 C 75 C 85 C 80 C 75 C 70 C 65 C 60 C HEATING SECONDRY FLOW CHARACTERISTICS LOGIC HIU INDIRECT 50 75 DHW SECONDRY FLOW CHARACTER...

Page 9: ...ance water check valve incorporated into inlet connection The filling loop and ball valves are used to fill and pressurise the secondary heating system the filling loop must be disconnected after pres...

Page 10: ...igure the control for different units within the range It is important that they are not changed from those shown below If they carehanged outside of these requirements it will cause the HIU to operat...

Page 11: ...valve actuator X X 5 Thermal safety relief valve 5a Pressure switch X X 6 Thermal safety thermostat X X 7 Heating flow temperature probe X X 8 Heating valve actuator X X 9 Earth X X 10 Pump X X 11 El...

Page 12: ...ashes On Off when in operation NOTE when in standby the display will alternate every 5 second displaying the CH and the DHW temperatures 21 DISPLAYED ERROR CODES When an error occurs on these units th...

Page 13: ...ode 76 LOW temperature Should the operating temperature drop below the required 25 C as a result of a faulty safety valve the flashing fault LED on the electronic controller will appear and Error code...

Page 14: ...to modulate the heating flow circuit for greater efficiency and to compensate for changes in the external environment LOGIC HIU DIRECT HT Direct wall mounted HIU with a 50kW indirect instantaneous pri...

Page 15: ...8 l m 0 3 l s Min flow rate to activate domestic flow sensor 2 7 l m 0 3 Max Differential pressure on domestic water modulating valve p 0 9 bar Min Differential pressure on domestic water modulating v...

Page 16: ...y filter and heat meter probe pocket 5 Heating circuit on off valve 7 Modulating primary control valve DHW 8 Plate heat exchanger DHW 9 DHW temperature sensor 10 DHW flow switch 11 Electronic control...

Page 17: ...Kv 2 20 m3 h H m c a H m c a p bar 3 3 5 G m3 h 0 6 0 4 0 3 0 2 0 1 0 2 5 2 1 5 0 5 0 5 1 6 4 3 2 1 5 7 0 7 0 8 8 20 20 5 13 14 19 17 LOGIC HIU Installation Servicing Users 28 UPM3 AUTO L HEATING FLO...

Page 18: ...TS 31 DOMESTIC HOT WATER OUTPUT PRIMARY FLOW PATH Primary Flow Rate l h HEATING FLOW HEATING RETURN Domestic Hot Water Flow Rate 48 C l h 18 LOGIC HIU Installation Servicing Users Kv 2 25 m3 h Flowrat...

Page 19: ...n screw driver slot horizontal to bypass Turn Vertical to connect the HIU to the primary circuit 33 PRIMARY BALL VALVE SET Flow Control Valves with sample points Inc sealing washer to appliance CONTEN...

Page 20: ...hazardous operational conditions To modify the factory settings and enable the HIU to support LOW temperature systems 25 to 45 C proceed as follows Electronic Control Dip Switch Settings Factory Sett...

Page 21: ...l safety relief valve 5a Pressure switch 6 Pressure gauge CH 7 Heating flow temperature probe X X 8 Heating valve actuator X X 9 Earth X X 10 Pump X 11 Electric supply 230 V ac X X 12 Room thermostat...

Page 22: ...when setting and displaying Flashes On Off when in operation Actual Domestic Hot Water DHW Set Point Temperature Value display permanently when in use or been set Radiator Symbol On when setting and d...

Page 23: ...ber relating to this fault will be displayed Central Heating outlet temperature probe fault If the heating probe fails the heating will cease immediately The domestic water generation will not be affe...

Page 24: ...charge pipework in accordance to the local by laws Electrical 1 Electric supply line 230 V ac 50 Hz 2 Time clock thermostat line potential free 3 Centralised bus line for heat meter data transmission...

Page 25: ...Check for leaks 12 After the primary feed system has been correctly purged Check to ensure to ensure the pressure is not greater than the maximum pressure specified for these units and the system doe...

Page 26: ...uit To clean these strainers carry out the following maintenance procedure Isolate electrics and primary valves Drain primary legs Unscrew the cap B Remove the st rainer mesh flush thoroughly with cle...

Page 27: ...d remove the cartridge H Remove any impurities present or change the cartridge if necessary and check flow turbine and saeling washer Screw in the cartridge Reposition the flow sensor and connection W...

Page 28: ...iced exchanger partly clogged call qualified personnel to have it serviced modulating valve actuator faulty call qualified personnel to have it replaced valve obturator blocked in intermediate positio...

Page 29: ...ystem temperature insufficient contact person in charge of system electronic controller not working call qualified personnel to have it replaced primary circuit flow rate insufficient contact person i...

Page 30: ...NOTES 30 LOGIC HIU Installation Servicing Users...

Page 31: ...NOTES 31 LOGIC HIU Installation Servicing Users...

Page 32: ...l is a trademark of Ideal Boilers Registered Office Ideal Boilers Ltd PO Box 103 National Avenue Kingston Upon Hull HU5 4JN Tel 01482 492251 Fax 01482 448858 Registration No London 322 137 Logic HIU C...

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