Operating instructions

DHW
l Open the main cold feed valve.
l Open all hot taps to purge DHW system.
l Check for water soundness.
Central Heating
l Open flow and return valves on the boiler.(l9 and 23
fig. 15)
l Open the automatic air vent (6 fig. 16)
l Fill system and vent radiators.
l Set system pressure and remove filling loop.
l Check for leaks.
l Manually check pump is free to turn.
l Switch on electrical supply.
l Turn selector switch (34 fig. 16) to heating only or heating
and hot water position.
l Allow pump to run for several minutes.
Fig. 15
l Isolate electrical supply.
l Drain boiler and check water filter (29 fig. 2) for
installation debris.
4 Turn the heating flow temperature adjustment to maximum
(37 fig. 16).
l The boiler will light.
1
l Replace filter and recharge system.
Lighting the Boiler
l Connect gas pressure gauge to test point ( 45 fig. 16).
l Turn on the gas supply and boiler gas tap ( 21 fig. 15.
l Ensure electrical supply is on.
l Ensure all external controls and built clock are calling for
heat.
l Turn selector switch ( 34 fig. 16) to heating only position.
l Allow the boiler to heat system.
l Check the inlet gas pressure (working pressure) while boiler
operating. (Refer to technical data).
l Check the operation of the boiler controls and safety
devices.(see separate servicing leaflet for details)
l Set the by pass (Refer to system guidance).
l Re-flush the system to remove any dissolved oils and fluxes.
l Recharge system pressure and introduce any water
treatment as required.