Fuel-Oil Or Gas Connections; Electrical Connections; Filling The System - Potterton NXR4i Installation And Service Manual

4.7 Fuel-oil or gas connections

Refer to the instructions supplied with the burner.
C: Furnace door insulation
D, E: Pressure gauge measurement socket
(1) Max attachment diameter:
- Max øB = 290 mm
- Max øB = 330 mm with 4 fastenings at 15° or 45°

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.
09/06/2011 - 300025088-001-B
The burner head deflector must be flush with the insulation
of the burner door.
D
Ø A 135 175
Ø B 170 200
Ø D 10 10
Ø E 10 10
Ø M 8 8
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.
NXR4i
4. Installation
E
8229N007-B
190 240 250 290
220 270 325 330
10 10 10 10
10 10 10 10
10 10 14 12
17