70 Watt Sodium Piazza Bulkhead
Luminaire
Stock No.
567-783
818-851
Figure 1.
Type
70W Bulkhead
70W SON-T Lamp
K
J
I
A
H
G
B
F
E
D
C
A.
B.
C.
D.
Reflector
Tamper-proof screws
Prismatic controller
Ignitor
E.
F.
G.
H.
Fixing holes (4 off)
Capacitor
Body
Cable clamp
General
Supplied to RS by Thorn Lighting Limited, the 70W High
Pressure Sodium Piazza Bulkhead Luminaire combines an
elegant appearance with a robust construction and high
performance.
Manufactured in polycarbonate, the luminaire has many vandal
resistant features including close fitting to mounting surface,
tamper-proof screws and a high environmental protection rating
of IP 65.
2.
3.
4.
5.
Important
This luminaire is supplied with a 70W SON-T lamp, should the
lamp fail, it must only be replaced with an identical product
such as RS stock no. 818-851.
Installation (refer to figure 1.)
1.
Remove fitting from packaging, but do NOT remove the
protective material from the edge of the prismatic
controller.
6.
7.
I. Cable entry (20mm)
J. Conduit entry knockouts (20mm)
K. Reflector retaining screw
Release the prismatic controller by unfastening the two
tamper-proof screws using the special key provided, and
hinge open the controller.
Loosen reflector retaining screw and remove reflector.
The four mounting holes are now visible. All should be
used to secure the luminaire to the desired vertical
surface. Seloc washers are provided to maintain the seal.
It should be noted that cable entry is possible via the rear
of the body using the 20mm clear hole provided. This is
however only suitable where the mains wiring is recessed
into the mounting surface . If this option is used the
sealing plug should be punctured using a screwdriver and
the incoming wiring pulled through to maintain the seal.
Side entry is possible via the three 20mm clearance
conduit entry knockouts.
If through wiring is required it is recommended that the
cable sleeve provided is fitted. Wiring passing behind the
gear tray should be placed in this sleeve.
8.
After drilling and plugging fixing holes, feed cable through
cable clamp and connect to terminal block.
9. Fix body securely to fixing surface.
10. Re-locate the reflector and tighten fixing screw. Fix the
lamp.
11. Locate the prismatic controller and secure using the
special key.
12. Remove protective material from the controllers edge.
Operating conditions
In the interest of safety, it is essential that the mains supply is
disconnected before re-lamping or servicing the luminaire.
Luminaires must not be mounted on normally flammable
surfaces.
Figure 3. Circuit diagram
P
Mounting and spacing data
A
As an approximate guide Figure 2 indicates Throw (T) and
Spacing (S) for various Mounting Heights (H). These distances
are based on providing at least 2 lux which is sufficient
illumination for most normal security/amenity applications. For
areas of particular risk or complexity, spacings can be reduced
up to 50%. Figure 2 shows several isolux curves. The
illuminance data shows the effects of using different mounting
heights.
B
PFC
F
C
D
N
E
Figure 4. Dimensions and fixing centres
Figure 2.
257
180
S
296
H
T
Spacing data
For two lux illumination
11
H
T
Mounting
height (metres)
Throw from
Spacing between
wall (metres) fittings (metres)
S
3
4
5
6
12.5
13.5
14.5
14.5
H
G
H
35
29
32
34
35
Top
232
Illuminance data
In lux
H
207
Mounting
height
(metres)
3
4
5
6
RS Components
20.0 10.0
11.3 5.6
7.2 3.6
5.0 2.5
5.0
2.8
1.8
1.3
2.0
1.3
0.7
0.5
1.0
0.5
0.4
0.3
A.
B.
C.
D.
Red
Yellow
Ignitor
Black
Issued May 1994
E. Lamp
F. Ballast
G. Cable entry
8199