Summary of Contents for Ferroli PREXTHERM
- Page 1 PREXTHERM WELDED STEEL BOILER from 86.000 to 860.000 kcal/H - from 100 to 1000 kW from 341.000 to 3.410.000 BTU/HR INSTALLATIONS AND OPERATING INSTRUCTIONS 06/97...
- Page 2 Contents 1. Dimensions and technical data 2. Installation 3. Operation 4. Maintenance PREXTHERM...
- Page 3 1. DIMENSIONS AND TECHNICAL DATA PREXTHERM 100-470 FERROLI FLUE CONDENSE DRAIN OFF Ø 1 Ø 3/8 Fig. 1 Legend Boiler shell a1 Flow connection Door a2 Return connection Burner mounting plate a3 Safety valve tapping Casing a4 Flue outlet Door insulation...
- Page 4 PREXTHERM 550-1000 0 0 0 FLUE CONDENSE Ø 3/8" DRAIN OFF Ø 1" min 250 Fig. 1b Legend Boiler shell a1 Flow connection Door a2 Return connection Burner mounting plate a3 Safety valve tapping Casing a4 Flue outlet Door insulation...
- Page 5 PREXTHERM 100-470 Boiler shell Door with burner mounting plate Flue hood Control panel Casing Insulation Fig. 2a PREXTHERM 550 -1000 Boiler shell Door with burner mounting plate Flue hood Casing Fig. 2b Insulation PREXTHERM...
- Page 6 1.01 PACKING AND SHIPMENT Fig. 3 PREXTHERM 100 - 470 The boilers are supply in N° 3 pieces: 1 - Boiler shell with door and flue hood 2 - Casing 3 - Control panel PREXTHERM 550 - 1000 The boilers are supply in N° 2 pieces:...
- Page 7 PREXTHERM...
- Page 8 Casing assembly instructions PREXTHERM...
- Page 9 PREXTHERM...
- Page 10 PREXTHERM...
- Page 11 The draught must be min. 0 mbar with boiler in operation. If the draught is higher, a draught regulator should be installed such that the draught on the boiler connection is 0 mbar, such to reduce stand-bye losses. PREXTHERM Fig. 6 PREXTHERM...
- Page 12 3 Burner plate 4 Front door 5 Burner 6 Turbulators 7 Boiler shell 8 flexible oil lines * In gas burners, decrease the combustion chamber pressure by 15% For ignition pressures, consider about 2.5 times the normal operation pressure. PREXTHERM...
- Page 13 BURNERS THREE-PHASE CONNECTION (main P.C.B. exclusion) ÷ The PREXTHERM 100 470 boiler harness is required for single-phase burners at 230 V with female connections. In case of burners with terminal board, the terminal board will have to be connected according to enclosed drawing.
- Page 14 After assembling the burner it might be necessary to adjust the door position. This may be done by loosening the dowel 8 and turning bolt 9. This should be done to assure that the sealing layer is pressed evenly against the rebate. Fig. 9 Fig. 10 PREXTHERM PREXTHERM 100 - 470 550 - 1000 PREXTHERM...
- Page 15 2.04 Location of boiler the introduction of the Ferroli boilers in the boiler house is very simple given their small size in relation to capacity. The boiler must be well ventilated and room temperature during operation should not exceed 35°C.
- Page 16 3.03 Functioning at low capacity Any time the heating system is required to slow down, as it normally would be in winter and fall, the Ferroli boiler would operate in high efficiency also at low capacity. To ensure proper operation, you should extract from the boiler pipes all the metal turbulence activators and set the burner to work with a single flame, or with two smaller flames.
- Page 17 Check the water level in the expansion tank. The level must be within the specified tolerance; if there is a need for continuous water replenishing, you should look for the causes (leaks, insufficient volume of expansion tank, etc.) and eliminate them. A continuous water refilling increases the danger of corrosion and of limestone deposits in the boiler. PREXTHERM...
- Page 18 The best safeguard during periods of icy weather is to keep the boiler and user facilities running, so that the whole system is working. You may also add antifreeze solution to the system water, at the ratio suggested by the supplier according to the lowest expected room temperature. PREXTHERM...
- Page 19 Electric diagram PREXTHERM 100 - 470 PREXTHERM...
- Page 20 Connection diagram PREXTHERM 100 - 470 PREXTHERM...
- Page 21 Connection diagram PREXTHERM 550 - 1000 10 11 12 230 V 50 Hz Fig. 15 THERMOSTAT REG. 1 ° STAGE THERMOSTAT REG. 2 ° STAGE SWITCH BURNER SAFETY THERMOSTAT TIME COUNTER 1 ° STAGE BURNER TIME COUNTER 2 ° STAGE COUNTER...
- Page 22 PREXTHERM...
- Page 23 37047 SAN BONIFACIO - VR - Italia Tel. 045/6139411 - Tlx. 480172 Fax. 045/6100233 - 6100933...