nilan LMC 223 Installation And User Manual
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All rights reserved Page 28 of 33Electrical connectionThe heat pump must be connected to electri-cal installation by an authorised electrician.2x230 V, N + PE, - 13 A, 50 Hz1x230 V, N + PE, - 20 A, 50 HZSupply cable: 4x1,5mm², HO5W-FThe supplied electrical diagram shows how toconnect the system to the gridFloor heating loopIMPORTANT: An overflow valve must be installed (Figure 5, no. 28) in the floor heating loop with afixed-speed circulation pump. Alternatively, individual thermostats must be installed to maintainsufficient flow.It is possible to connect an external run signal to the pump control unit (see wiring diagram) fromeg a floor heating system.Starting with software version 1.10 of LMC223, this works as an external summer-/winter shift. Inthe controller menu SERVICE SELECT USER FUNK can be select HEATING. . When HEATING ischosen you make and extreme change between winter - and summer operation. The controller isforced to run in winter operation when the digital input 4 is close. Conversely, the control is forcedto run in summer operation when the digital input 4 is open. In winter operation the pump in centralheating is running. User Function HEATING assumes that the system is in DRIFT-AUTO.Ground source loopWhen setting up a ground source loop, there are a number of clearance requirements which mustbe complied with to ensure efficient and trouble-free operation. Furthermore, local authorities oftenstipulate their own requirements for installation and approval of the system before it is commis-sioned. |
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