However, if the system employs thermostatic radiator valves on all radiators, or two port valves without end switches, then a bypass circuit must be fitted with an automatic bypass valve to ensure a flow of water should all valves be in the closed position. ELECTRICAL SUPPLY WARNING. The appliance MUST be efficiently earthed. Wiring external to the appliance MUST be in accordance with the current I.E.E. (BS.7671) Wiring Regulations and any local regulations which apply. For Ireland reference sho

1. Ensure the flue seal collar B is located onto the flue assembly A. 2. Position the roof flashing plate D (supplied separately) over the hole cut in the roof and insert flue assembly A from the roof end. 3. Remove the casing top blanking plate and gasket and refit to the boiler rear flue hole. 4. Fit the boiler vertical conversion kit (to be found in the vertical connector kit). Refer to Frame 26 No's 2 to 7. 5. Push fit the vertical connector E (supplied separately) into the boiler flue conne

Refer to Frame 61. 2. Pull off the two electrical connections. 3. Remove the two nuts retaining the flue protection thermostat. 4. Replace the thermostat and re-assemble in reverse order 2 3 SERVICING 67 PILOT BURNER REPLACEMENT 1. Refer to Frame 61. 2. Remove the burner and air box assembly. Refer to Frame 54. 3. Remove the electrode retaining nut and remove the pilot shield and electrode. 4. Unscrew the central pilot fixing screw and lift the pilot clear of the pilot injector. The pilot inject

January 2008 UIN 201 850 A06 For the very latest copy of literature for specification purposes please visit our website where you will be able to download the relevant information in pdf format. classic HE -Installation & Servicing DOCUMENT AMENDMENTS Relevant Installation changes implemented in this book from Mod Level ............ A05 (Oct 06) to A06 (Jan 08) • Various Pages Company Name Change. • Page 26 & 27, Frames 39 & 40 - Condensate Pipe Termination Configurations BS6798 recommends that

If after calculating or measuring the overall flue height from the top of the boiler, it is necessary to cut both pipes of assembly A, then ensure they are cut equally leaving the inner flue tube longer than the outer air tube as supplied. Ensure the cut pipe ends are free from any burrs. 1. Position the roof flashing plate (supplied separately) over the hole cut in the roof and insert flue terminal from the roof end. 1 nm8739 min 16o max 41o MAX LENGTH: 7.5m BOILER Pitched roof tile Flue Termin

4. Adjust room and cylinder thermostats and programmer to NORMAL settings. The system should be vented directly off the boiler flow pipe, as close to the boiler as possible. The cold feed entry should be inverted and MUST be positioned between the pump and the vent, and not more than 150mm (6") away from the vent connection. Note. Combined feed and vent pipes may also be fitted. There should be a minimum height 450mm (18") of open vent above the cistern water level. If this is not possible refer

April 2008 UIN 203318 A04 For the very latest copy of literature for specification purposes please visit our website where you will be able to download the relevant information in pdf format. icos -Installation & Servicing DOCUMENT AMENDMENTS Relevant Installation changes implemented in this book from Mod Level ......................... A03 to A04 (Apr 08) • Page 15, Frame 11 - Unpacking Change to boiler contents, wall mounting template now mounted on internal packaging. • Page 15, Frame 12 - Pa

12. Pull the display unit forward to remove. 13. Push the new display unit into position. 14. Reassemble in reverse order. 15. Check the operation of the boiler. Refer to Frame 52. Ecl 2419 Mounting brackets Control box 11 nm7804 Ecl 2438 4 SERVICING icos - Installation & Servicing 41 SERVICING 1. Refer to Frame 52. 2. Remove the boiler front and sealing panels. Refer to Frames 45 & 46. 3. Pull off the silicon tube from the thermistor housing. 4. Remove the aluminium nipple securing the thermist

pressure Low mbar in.w.g. 10.4 4.2 10.1 4.0 9.7 3.9 9.6 3.8 9.7 3.9 5.1 2.0 4.9 2.0 4.8 1.9 4.7 1.9 4.8 1.9 Part load efficiency % 83.0 81.6 82.5 82.9 82.8 Note. To obtain gas consumption in l/s divide gross heat input (kW) by a calorific value of 37.8(MJ/m2) Table 2 - General Data Boiler CXSi 110/H CXSi 120/H CXSi 140/H CXSi 160/H CXSi 180/H Number of sections 7 7 8 9 10 Flow connections Rc 65 mm (2 1/2") nominal bore. Flange to BS.4504 (PN6) Return tappings Rc 2 x 2 Maximum static head m. (ft)

These requirements override the information given in Frame 3 if the static head required for the pump(s) exceeds that required for the boiler. MINIMUM FLOW OF WATER - Refer to Table 4 The system design must provide for an adequate flow rate through the boiler at all times when the boiler is firing. The minimum flow rate should correspond to a temperature difference across the boiler flow and return of 35°C (63°F), assessed at catalogue rating. Table 4 - Flow rates for fully pumped systems Boiler