4
0020008877-04
General Information
General Note
This boiler is a wall hung high efficiency condensing boiler,
designed to provide central heating from a fully pumped open-
vented or sealed water system with a fully indirect cylinder.
Once the controls are set the boiler operates automatically.
Please read these instructions and follow them carefully for the
correct installation and economical use of your boiler.
Water Treatment
In the case of an existing installation, it is ESSENTIAL that prior
to installing the new boiler the system is thoroughly flushed. For
optimum performance after installation of a new system, the
boiler and its associated central heating system should also be
flushed. Flushing should be carried out in accordance with
BS7593: 1992 using a cleanser such as Sentinel X300 or X400,
Fernox Superfloc or Salamander corrosion guard cleaner.
For long-term corrosion protection, after flushing, an inhibitor
suitable for stainless steel exchangers should be used, refer to
the current issue of BS 5449 and BS 7593 on the use of
inhibitors in central heating systems. Examples are Sentinel
X100 Fernox or Salamander corrosion guard inhibitor.
We do not recommend filling using artificailly softened water.
Compartment or Cupboard Installations
If the boiler is fitted into a compartment or cupboard it does not
require ventilation openings.
Do not use the compartment or cupboard for storage.
Clearances
If fixtures are positioned close to the boiler, space must be
left as shown in diagram 2.1. Enough space must also be
left in front of the boiler to allow for servicing.
Condensate Drain
The condensate drain, see section 7.3, must not be modified or
blocked.
Pluming from flue terminal
Like all condensing boilers this appliance will produce a plume
of condensation from the flue terminal in cool weather. This is
due to the high efficiency and hence low flue gas temperature
of the boiler. It is normal and not a fault indication.
Cleaning
The boiler casing can be cleaned using a mild liquid detergent
with a damp cloth, then a dry cloth to polish.
Do not use any form of abrasive or solvent cleaner as you may
damage the paintwork.
Electrical Supply
If the mains electricity and gas are to be turned off for any long
periods during severe weather, it is recommended that the
whole system, including the boiler, should be drained to avoid
the risk of freezing. Make sure that, if fitted, the immersion
heater in the cylinder is switched off.
If you have a sealed water system contact your installation/
servicing company as draining, refilling and pressurising MUST
be carried out by a competent person.
Gas Supply
NOTE: This appliance is factory set at 18kW output.
On completion of the adjustment, the inlet working pressure of
the appliance should be checked to ensure a steady inlet
working pressure of 20mbar is achieved.
Thermal Stores
This appliance is suitable for installation with thermal stores,
however, the appliance should be adjusted to give the maximum
31kW output.
IMPORTANT: If the seal on the 'Pmax' potentiometer is broken
the gas supply, without exception, must be capable of delivering
31.3kW input.
Manual Handling
IMPORTANT: With regards to the Manual Handling Operations,
1992 Regulations, the following lift operation exceeds the
recommended weight for a one man lift, refer to Section 14. for
more information.
