Fuel-Oil Or Gas Connections; Electrical Connections; Filling The System - Potterton NXR3i Installation And Service Manual

4.7 Fuel-oil or gas connections

Refer to the instructions supplied with the burner.
The burner head deflector must be flush with the insulation
of the burner door.
A Furnace door insulation
B Turbulator
C 4 markings on Ø 170
D 4 markings on Ø 200
E 4 markings on Ø 220
F Pressure gauge measurement socket

4.8 Electrical connections

Refer to the connection instructions supplied with the control
panel..

4.9 Filling the system

Filling shall be performed with a low flow rate from a low point in the
boiler room in order to ensure that all the air in the boiler is bled from
the high point of the system.
All the pumps must be stopped before filling (included shunt
pump(s)).
Do not add cold water suddenly into the boiler when it is
hot.
18
B
NXR3i NXR3i
VERY IMPORTANT: Instructions for starting up the boiler
for the first time after the system is fully or partly drained:
If all the air is not bled naturally to an expansion vessel
which opens out onto the air, the system must include
manual bleeder valves, in addition to automatic bleeder
valves with the capability to bleed the system by
themselves when it is operating, the manual bleeder valves
are used to bleed all the high points of the system and to
make sure that the filled system is free of air before the
burner is turned on.
O
E
F
M001614-B
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