ROC COMBI HE 2802 - Draining the Boiler; Safety Relief Valve; Gas Connection; Water Connection

21
Safety relief valve
Safety relief valve has a discharge pipe
which should be connected to a 15 mm
suitable plastic or copper pipe using either
a compression tting or a push t, this pipe
should terminate below the boiler safely
outside the building; ensure the discharged
does not endanger any passerby.
Gas connection
Please ensure, using the labels on the package
and the data plate on the appliance itself, that
the boiler is in the correct country and that
the gas category for which the boiler was
designed corresponds to one of the categories
available in the country where it will be used.
The gas supply piping must be created and
measured out in compliance with specific
legal requirements and in accordance with the
maximum power of boiler.
Check that the supplied gas corresponds to the
type of gas for with the boiler was designed
(see the data plate located on the appliance
itself).
The gas supply pipe should be sized to provide
a min 20mbar gas pressure when gas boiler is
running on maximum power.
Water connection
Please ensure the pipe system has been
flushed completely before connecting the
cold supply to the boiler. Please check the
maximum water pressure and make sure it
does not exceeds 6 bar, if it exceeds 6 bar
then a pressure reducing valve should be
equipped.
Before connecting the heating pipe to the gas
boiler, wash the pipe and radiator cleaning
all foreign body in the pipes, otherwise these
foreign bodies may cause obstructions. Please
ensure the heating system has been pressure
tested to ensure there are no leaks. Please be
careful when installing the pipe connection, to
avoid the appliance leaking.
Circulation pump pressure
When calculating the size of the heating
installations please refer to the above pump
pressure diagram.
Note:
When using for the rst time, the trap should
be filled with water. To do this add 1/4 litre
of water via the flue outlet as shown on the
diagram below.
Warning!
Insufficient water in the tank can cause the
appliance to smoke for a short time.
(L/h)
(kPa)
Draining the boiler
To drain the water contained within the boiler,
attach a pipe (garden hose pipe) to the outlet
on the pump – (diagram required). Use a 10/8
mm spanner to open the valve and allow the
water to drain out of the boiler into a sink or
outside the property. Please ensure the valve
is closed before relling the boiler.