Technical data

35
6. COMMISSIONING
6.1 Fill and de-aerate the appliance and the system
WARNING
Connect the appliance to the mains voltage only after
filling and de-aerating!
6.1.1 CH system
WARNING
All new and existing systems must be thoroughly
drained and flushed out in accordance with BS7593
requirements. A suitable cleaning agent is Sentinel X400.
A corrosion inhibitor should be added and the
concentration level checked. The inhibitor should be
suitable for the materials used in the appliance, such as
copper, brass, stainless steel, steel, plastic and rubber.
A suitable product is Sentinel X100. When using these
products manufacturer’s instructions must be followed.
1. Use the filling loop to fill the system to a maximum pressure of 1 to 2
bar with a cold system.
2. De-aerate the appliance with the manual air vent (A in diagram).
Alternatively, an automatic air vent can be fitted instead of the manual
air vent.
Note: When the appliance is located at, or near to, the top of the
system (eg in a loft), an automatic air vent should be fitted.
3. Vent each radiator and purpose fitted air vent in turn starting with the
lowest in the system. The system pressure should be regularly
monitored during this process and topped up when required.
4. Air should be vented from the appliance pump by opening the pump’s
vent plug and allowing water to bleed for a few seconds.
Note: Take care that the water does not splash onto the electric parts
(eg controller and terminals).
5. Check all joints for leaks.
6. Fill the condensate trap with water – important (see diagram).
6.1.2 Gas supply
7. Purge the gas supply if necessary via the inlet pressure measuring
nipple on the gas valve.
8. Check the connections for leaks.
9. Check the inlet pressure. See §7.8 Gas-air control.
Note
The appliance must be installed and
commissioned in accordance with the
manufacturer’s instructions in order to comply
with the Building Regs. To demonstrate
compliance, the Benchmark Checklist (located
at the back of this Manual) must be completed
and signed at the time of commissioning, and
left with the customer.
Failure to install and commission
according to the manufacturer’s
instructions and
complete the Benchmark Commissioning
Checklist will invalidate the warranty for
Gas Boiler installations in the UK.