RDG603A27 – Issue 6 Page 30 of 59Barrus Alternator (Amps) Barrus Tacho reading50 10.50 – 11.0070 15.00150 19.50 – 20.00240 22.00Alternative or non-standard alternators will require calibrating and checking by trial and error,with a hand held tacho until the engine speed and indicated tachometer speed are the same.17. Calorifiers (Optional) These are not fitted as standard but are available as an option If calorifiers are fitted the following instructions must be complied with:The temperature of coolant flowing to the calorifier from the engine can be between 85 and90°C. A blender valve must be incorporated in the calorifier / hot water system outlet to lowerthe hot water temperature for domestic use.Figure 11: Shire 70 WB Calorifier ConnectionsCalorifier OutletCalorifier Inlet
