... are made of galvanized steel, properly punched and punched for fixing both accessories and the unit itselfHEATING COILThe coils ... of the water connections.OPTIONAL ON-BOARD THERMOSTART HL107DB: for two pipe system use, working mode selection (OFF-Heating ... terminal units of the air conditioning system,. Applicable to hotels, villas, hospitals, cinemas, stadiums, recreations, office blocks, factories and ...