IMPORTANT: SYSTEMS SHOULD BE FLUSHED AND PROTECTED IN ACCORDANCE WITH BS7593-1992. Please check Boiler and other Primary Equipment's Installation Instructions prior to filling.| 6 FILLING. |
| 6.1 IMPORTANT: SYSTEMS SHOULD BE FLUSHED AND PROTECTED IN ACCORDANCE WITH BS7593-1992. Please check Boiler and other Primary Equipment's Installation Instructions prior to filling. |
6.2  It is important that SENTINEL X100 Inhibitor is used to protect the Heat Bank Thermal Store. Use 1 litre per 100 litres of stored water. Label the unit as protected with the label provided. Contact Betz Dearborn direct for method statements on 0151 424 5351 Alternatively contact Fernox on 01799 550811. |
| 6.3 IMPORTANT: The Primary System should be fully flushed and an inhibitor, suitable for the purpose, used to protect both the primary and the Heat Bank Thermal Store systems. Betz Dearborn SENTINEL X300 should be used to flush the Primary System prior to filling new systems. Use SENTINEL X400 for existing systems. Please contact Betz Dearborn direct for method statements on 0151 424 5351, or alternatively contact Fernox on 01799 550811. |
| 6.4 Xcel Heat Bank Thermal Stores are filled by openening the water supply to the Feed and Expansion Tank. |
| 6.5 Check that all air locks in the Primary System are cleared properly, and all Radiators bled. |
| 7 COMMISSIONING. |
| 7.1 Set the Boiler Thermostat to maximum. |
| 7.2 Set the Primary Pump to Speed 3. |
| 7.3 Set the Heat Bank Thermal Store Pump to speed 2. |
| 7.4 Follow any specific commissioning instructions given in the Boiler Installation Instructions. IMPORTANT: ONLY SUITABLY QUALIFIED INSTALLERS CAN COMMISSION A GAS BOILER. |
| 7.5 Turn on the electrical supply. |
| 7.6 Bleed all pumps as described. |
| 7.7 Run through the operation of the system as follows: |
| 7.7.1 Set the programmer to Hot Water ON. |
| 7.7.2 The boiler should fire, and the primary pump turn on. Within a short time (3 minutes) the flow from the boiler should feel hot to the touch. Check that the pipework to the primary coil is also hot. The flow to the central heating should not be hot at this stage. |
| 7.7.3 Set the Programmer to Heating ON. The flow to the heating circuit should now get hot. |
| 7.7.4 Turn off both the Hot Water and Heating on the Programmer. The Boiler should stop firing, and the primary pump stop - on systems where the boiler uses a pump over-run, the pump may not turn off for a few minutes. |
| 7.7.5 Bleed the entire system to remove air. |
| 7.7.6 Turn the Hot Water ON to allow the cylinder to fully recover. As it does, adjust the Balancing Valve on the Flow (or return) to the Primary Coil to obtain a temperature difference of approximately 10°C (or as specified in the Boiler Installation Instructions) between the Boiler Flow & Return. |
| 7.7.7 Check that the water level in the Feed & Expansion Tank is at least 25mm below the overflow (once the unit has FULLY recovered). If necessary, adjust the position of the Ball Valve Float to obtain this. |
| 7.7.8 Once the cylinder has recovered, check that hot water is available at all outlets. |
| 7.8 Should the incoming mains flow rate exceed the maximum transfer rate for the domestic heat exchanger, the hot outlet temperature will drop. This can be corrected by adjustment of the stop cock on the incoming mains to achieve a flow rate off approximately 26 litres/minute. |
| 7.9 Check that a copy of both the Installation / Users Instructions is left with the Heat Bank Thermal Store, or occupier, as required. |