Technical data

10.0 Commissioning
29
IN OUT
Fig. 36
Fig. 37
Inlet Gas Pressure Test Point
DO NOT check gas pressure here
Expansion Vessel removed
for clarity
Gas Valve
Low
High
ON
Reset
10.1 Commissioning the Boiler
1. Ensure that the filling loop is connected. Open the
cold mains stop valve.
2. Ensure that the heating flow and return valves are
open.
3. Open the system side stop valves.
4. Open the manual and automatic air vents (Fig. 35). To
help purge the primary circuit turn the pump on & off
several times by using the Reset button (Fig. 36) (ensure
all external controls are turned on and calling for heat).
5. The system must be flushed in accordance with BS
7593 and the flushing agent manufacturers instructions,
further guidance can be obtained from BS 5449 Section
5.
6. Refill the system and add inhibitor following the
inhibitor manufacturer’s instructions. Vent air as
described in Step 4.
7. Complete the label supplied with the inhibitor and
attach to the inside of the boiler case. Detail of system
treatment should be added for future reference.
8. Pressurise the system to 1.5 bar then close and
disconnect the filling loop.
9. Turn the gas supply on and purge according to in GB
BS 6891 and in IE IS 813 "Domestic Gas Installations".
10. Turn the gas service cock anticlockwise to the ON
position and check for gas soundness up to the gas valve.
11. Run the system and check the boiler for correct
operation.
12. After a period of 3 minutes and with all the system
controls calling for heat, check the gas pressure at the
inlet tapping of the gas valve (Fig. 37) is within the limit
given in section 4.0 and the gas rate is no greater than
maximum specified.
WARNING: The PCB Control and Fan
Assembly is 325 Vdc. Isolate at supply
before access.
Automatic Air Vent
Manual Air Vent
Fig. 35
Reset Button