Uno - Installation Manual

3.2 CONTROL PANEL

3.2 CONTROL PANEL LEGEND: 2 3 4 5 A A - Central heating selection (winter) and temperature adjustment knob B - Ignition failure (lockout) L.E.D. (red) C - On/Off/ Reset knob D - Fume sensor L.E.D. (yellow) E - Domestic hot water temperature adjustment knob F -On/Off L.E.D. (green) G - Heating system pressure gauge 2 3 4 6 5 0 6 I B C D FR025A In the event that the red L.E.D. “B” and the yellow L.E.D. “D” light together, this is due to the water pressure in the system being too low or a lack of water circulation. Every time the boiler is turned on the three L.E.D’s “B”, “D” and “F” will light for approx. 1 second. G F E FIG. 3.0 3.3 REMOVING THE FRONT PANEL In order to access the inside of the boiler, it is necessary to: 1- Unscrew the two screws “A” on the top of the boiler 2- Remove the screws beneat the boiler (see below), rotate the case catches inwards 3- Gently pull the side panels away from the boiler and pull forward to remove the casing panel. 1 3 2 3.4. INITIAL START-UP THE CHECKS TO BE RUN BEFORE INITIAL START-UP ARE AS FOLLOWS: 1. Make sure that: - the screw on the automatic air valve has been loosened when the system is full; - If the water pressure in the system is below 0.7 bar, bring it up to the appropriate level; - Check to see whether the gas cock is closed; - Make sure that the electrical connection has been made properly and that the earth wire is connected to an efficient earthing system; - Supply power to the boiler by turning the On/Off switch “C” (see FIG.3.0) in the position “I” - the L.E.D. “F” will illuminate - turn the selector knob “A” to the winter /central heating position. This will start the circulation pump. After 10 seconds, the boiler will signal a shutdown due to ignition failure. Leave the boiler as it is until all of the air has been bled from the lines. - Loosen the cap on the head of the pump to eliminate any air pockets; - Repeat the procedure for bleeding the radiators of air; - Open the taps for a brief period; 16

- Check the system pressure and, if it has dropped, open the filling loop again to bring the pressure back up to 0.7 bar. 2. Check the exhaust flue for the fumes produced by combustion. 3. Make sure that all gate valves are open; 4. Turn on the gas cock and check the seals on the connections, including the one for the burner, making sure that the meter does not signal the passage of gas. Check the connections with a soap solution and eliminate any leaks. 5. Turn and release the knob “C” to the RESET position for the lighting system; the spark will light the main burner. If the burner does not light the first time, repeat the procedure. 6. Check the minimum and maximum pressure values for the gas going to the burner; adjust it if needed using the values indicated in the table in section 4 (See the relative section for burner pressure adjustment within the servicing manual). 3.5 OPERATIONAL ADJUSTMENTS (See section 3.2 for references) it is possible to: - Set the temperature of the heating system by adjusting the knob “A” - Set the temperature of the domestic hot water by turning knob “E” To access the areas in which adjustments are made, it is necessary to open the control panel, as indicated in section 3.3, then rotate the control panel forward and remove the P.C.B. cover. Access is thereby provided to the P.C.B. and to the following components: 1. the power supply cable connector; 2. the fuses; 3. Slow Ignition Adjustment and Maximum Heating Adjustment Jumper “P” used to set the maximum heating adjustment and the slow ignition adjustment is set to position “B” for normal operation. To change the factory setting move the jumper “P” from postion “”B” to postion “A”. The red L.E.D. will begin flash. This indicates that it is now possible to adjust the slow ignition and the maximum heating adjustment. The slow ignition adjustment can be carried out by turning knob “E” (D.H.W. temperature adjustment), the maximum heating adjustment can be carried out by turning knob “A” (C.H. temperature adjustment) To store the new settings, return jumper “P” to its original position “B”. During this operation the boiler must be powered at all times. 4. Setting the Ignition Delay Jumper “N” controls the ignition delay and is factory set to 2 minutes (position “B”). By moving the jumper to position “A” the ignition delay is cancelled (0 minutes). 17