CBX 24 & 32 SBX 30 - Trademate Home Page

9.3 GAS CONTROL VALVEINCLUDING AIR INLET COWLRefer to Figures 33, 34 & 35a) Ensure supply voltage is isolated, and that the gas supply isisolated.b) Remove the gas control valve, fan & burner assembly; refer tosection 6.2.c) Unscrew four screws holding the gas feed pipe, and removegas feed pipe, refer to Figure 33.d) Unscrew three tork screws (T-20), and remove gas controlvalve, refer to Figure 34e) Unclip the top section of the black plastic air inlet cowl fromthe fan assembly, and remove white plastic insert, clean orreplace as necessary, refer to Figure 35.f) Refit or replace the top section of the black plastic air inletcowl, ensuring that it is clipped into place and that the holes inthe white plastic insert are aligned with the fixing holes.g) Attach and secure the gas feed pipe to the replacement gasvalve, using a new gasket.h) Attach and secure the replacement gas control valve to thefan assembly.i) Re-assemble in reverse order; ensure that all joints and sealsare correctly re-fitted.Note: The gas control valve is factory set and sealed and is notadjustable. If the gas control valve is changed, then when theappliance is running, the flue gas CO 2 should be measured, referto section 6.1, and compared to the values stated in PerformanceData, section 2.2. If the measured value does not correspond tothe Performance Data, then contact: Halstead Boilers Ltd. ServiceHelp line: 01926 83483433 GAS FEED PIPE CONNECTION TO GASCONTROL VALVE34 GAS CONTROL VALVE9.4 FANRefer to Figures 35, 36, & 37a) Ensure supply voltage is isolated, and that the gas supply isisolated.b) Remove the gas control valve, fan & burner assembly; refer tosection 6.2.c) Remove the gas control valve including air inlet cowl; refer tosection 9.3.d) Unscrew the three screws holding the lower section of theblack plastic air inlet cowl and gas valve mounting plate, removeplate and cowl; refer to Figures 35 and 36.e) Unscrew the four screws holding the fan to the burnermanifold, and remove fan; refer to Figure 37.f) Attach and secure the replacement fan, replace the gasket.g) Re-assemble in reverse order; ensure that all joints and sealsare correctly re-fitted.35 AIR INLET COWL31