ROC COMBI HE 2802 - Appliance Adjustment; Check the Circuit and Power; Cleaning of Heating System

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Open the central heating flow and return
cock supplied with the connection kit.
●
Lift the cap on the automatic air release
valve and leave open permanently.
●
Close all air release valves on the central
heating system.
●
Gradually open the valves at the lling loop
until you can hear water owing, do not open
the valve fully.
●
Open each of the air release taps on the
radiator starting with the lowest point and
close them only when clear water free of air
bubbles are visible.
●
Purge the air from the pump by unscrewing
the pump plug anti-clockwise, also manually
rotate the pump shaft in the direction indicated
by the pump label to ensure the pump is free,
ret the pump plug.
●
Continue lling the system until at least 1.0
to 1.5 bar registers on the pressure gauge.
●
Inspect the system for water leaks and
remedy any that are discovered.
Warning!
The system pressure should not exceed 1.5
bar. Always remember to turn off the filling
loop immediately after lling the system.
Gas Supply
Inspect the entire installation including the
gas meter and test for tightness. The entire
installation should be in accordance with the
relevant standards. In the UK this is BS 6891.
The connection on the appliance is a 15mm
(22mm on the 40kW) nut and olive located at
the rear of the gas service cock.
Check the circuit and power
Check if the voltage matches with the
requirements, if the polarity of power is
correct, if the earth connection is correct and
if the resistance to ground is normal.
Any problems with the power supply will lead
to improper working and even damage of the
appliance, and it may cause injuries.
Cleaning of heating system
Carefully rinse the entire heating system to
remove all residues that might be left in the
system before it is put into operation, to avoid
blockage and damage to the system during
operation.
Fill water to the D.H.W.
Close all hot water draw off taps.
Open the cold water inlet cock supplied with
the connection kit, slowly open each draw
off tap and close them only when clear water
which is free of bubbles is visible.
APPLIANCE ADJUSTMENT