Potterton NXR4 Installation, Operation & Maintenance Manual page 22

POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION & MAINTENANCE MANUAL
NXR4
ASSEMBLY OF INSTRUMENT PANEL – MUST BE
CARRIED OUT BY A COMPETENT PERSON
1 Open the control panel carton.
2 Remove the protecting screen lifting it vertically.
3 Open front of control panel by unscrewing the
two self-tappers.
4 Remove the 3 plastic blanking covers, and
blanking cover above the fuse.
5 Open the Eco panel kit.
6 Insert panel in space feeding wires through to
cables side.
7 Using the four off self-tapers and two metal
plates, fix the Eco panel kit to the Eco panel.
8 From the first stage hours run meter connect the
live to Terminal T2 (see wiring diagram).
9 From the first stage hours run meter connect the
neutral to the neutral in the control panel (see
wiring diagram).
10 From the second stage hours run meter connect
the live to Terminal B5 (see wiring diagram).
11 From the second stage hours run meter connect
the neutral to the neutral in the control panel (see
wiring diagram).
12 Fix the earth wire to the earth connection in the
control panel (see wiring diagram).
13 Take the flue gas thermometer and insert in hole
above the fuse (ensuring that it is inserted the
correct way up).
14 Pass through phials to the rear of the panel via
the rectangular cutout.
15 Bring burner cables and connectors down by
sliding them between the exchanger and casing
side lagging material.
16 Feed behind the lower lug with the connectors
towards the burner position (Fig.16).
Fig.15 – Instrument Panel Assembly
Top
Front
17 Position the control panel on the front top, lining
up with its fastening position guiding the wires
and capillaries into the rectangular cut out while
tilting the panel.
18 Remove the top control panel (three screws),
(see Fig.15). Engage the fastening screw heads
into the punched holes on the control panel rear.
19 Connect the earth wire (one off M5 x 10 screw +
paint cutting washers) onto the clamp nut A
(Fig.16).
20 Gather the capillary bulbs and insert fully into the
front sensor pocket. Secure the capillaries into
the sensor pocket using the clip provided.
21 Thread the flue gas thermometer under the top
insulation blanket to the rear of the boiler.
22 Connect the control panel to the power supply.
23 Open the panel front (two screws).
24 Connections must be made to the terminal block
inside the panel. Insert the cables into the clamp
at the back of the panel before connecting them
to the terminal block. Fasten the wires into the
internal wire clamps.
Connections to be made include: -
−
240V 50Hz 1Ph power supply + earth (see
wiring diagram). The cable must be able to
withstand 5A under 240V. The switches
located on the control panel do not dispense
with the requirement that a main isolator
switch is fitted.
−
Heating system-circulating pump.
−
Any external contacts.
25 Once connections are completed close the
control panel front and fasten.
26 Refit the protective screen
27 To fit the flue gas thermometer drill a 7.5mm
diameter hole, preferably vertically, in the flue
between the flue hood and stack. Insert the
thermometer and clip (Fig.17).
Plastic Nuts Sheet metal screw
SECTION 4
PAGE 21