Eterna PIRF120BK Installation Instructions Download Page 3

Fig 5

inSTAllATiOn:

When installing the PIR flood light refer to Fig.4 on 

the previous page.
01)  switch off the mains before commencing 

installation.

02)  Remove the wall bracket from the fitting by 

removing the screws and nuts from each side. 

Take care not to lose any of these parts as the 

nuts are not captive within the fitting - see fig.4.

03)  Using the bracket as a template mark and then 

drill the appropriate fixing holes.

04)  secure the bracket with suitable fixings (not 

supplied).

05)  Unscrew the junction box cover screws and 

remove cover, unscrew the gland nut and loosen 

the cable restraint clamp. connect the power 

cable (not included) to the terminal block, see 

fig. 4. Ensure the cable passes through the cable 

gland and gasket.

06)  Re-fit the terminal block, tighten the cable 

restraint clamp, tighten the gland nut and re-fit 

the cover.

07)  Fix housing back into wall mounting bracket and 

secure with screws, washers and nuts previously 

removed.

08)  Unscrew the lamp cover screw and insert the 

lamp making sure it is correctly seated in the 

lampholder (do not touch the bulb with bare 

hands use a soft cloth) then re-fix the cover.

09)  Adjust the direction of the floodlight and tighten 

the head fixings ensuring that you have used the 

lock washers.

10) Restore mains power.
11)  Adjust the PIR sensor floodlight to the desired 

settings.

impORTAnT

 

Loosen the lock nuts and screws on sensor and 

floodlight before making any adjustments.
 

UnDeRSTAnDinG THe COnTROlS:

(Referring to Fig.5 above)

ADJUSTinG THe DURATiOn Time:

 

The length of time that unit remains switched on 

after activation can be adjusted from (5±1) seconds 

to (8±1) minutes approximately. Rotating the TIME 

knob from (+) to (-) will reduce the duration time.  

note:

 once the light has been triggered by the PIR 

sensor any subsequent detection will start the timed 

period again from the beginning.

ADJUSTinG THe lUx COnTROl level: 

 

The Lux control module has a built-in sensing device 

(photocell) that detects daylight and darkness. The 

(

R

) position denotes that the floodlights can work 

at day and night, and the (

) position only work at 

night. you can set to operate the unit at the desired 

level by adjusting the LUx knob.

ADJUSTinG THe SenSiTiviTY: 

 

The sensitivity means the maximum distance which 

PIR sensor can be triggered by movement - turning 

the sEns knob from (+) to (-) will decrease the 

sensitivity.

SeTTinG THe COnTROlS:

 

wAlK TeST

Turn the Lux control knob to light (

R

) ensure that the 

TIME control knob is set at minimum duration time 

(-) position (rotating the TIME knob anti-clockwise 

to stop-position). The floodlight will now switch on 

and remain on for about 5-15 seconds after each 

detection.
01)  Direct the sensor toward the desired area to be 

scanned by adjusting the swivel joint on the 

sensor arm. 

important: loosen the lock nuts and screws 

on sensor and floodlight before making any 

adjustments.

02)  Have another person move across the center 

of the area to be scanned and slowly adjust the 

angle of the sensor arm until the unit senses 

the presence of the moving person, causing the 

floodlight to switch on (refer to Fig. 2).

03) Adjust time control to required setting.
04)  To set the light level at which the floodlight will 

automatically switch “on” at night, turn the LUx 

control knob from daylight (

R

) to night (

). If the 

floodlight is required to switch on earlier, e.g. 

dusk, wait for the desired light level, then slowly 

turn the LUx control knob towards daylight while 

someone walks across the center of the area to 

be detected. When the floodlight switches on, 

release the LUx control knob. you may need to 

make further adjustments to achieve your ideal 

light level setting.

L

N

TIME

LUX

SENS

Yellow/Green
(Power Cable)
Blue / White
(Power Cable)
Brown
(Power Cable)

Yellow/Green
(Earth)
Blue
(Power Cable)

Brown
(Power Cable)

RED (PIR Switch Wire)

White 
(Lamp Wire)

Terminal Block

Power

Cable

L N

Brown (power cable)

Blue

(power

cable)

Yellow / Green

(power cable)

Lamp Cover Screw

Cable Gland

Wall Mounting

Support Screws

Wall Mounting

Support Bracket

Junction Box

Locking Nut

2.5M

4M

8M

12M

180˚

Appr.

TROUBleSHOOTinG AnD USeR HinTS:

note:

 all passive infra red detectors are more sensitive in cold and dry weather than warm and wet weather.

pROBlem

pOSSiBle CAUSe

SUGGeSTeD RemeDY

Light does not switch on 

when there is movement 

in the detection area.

1. no mains voltage

check all connections, and McB Fuses / switches

2. nearby lighting is too bright

Redirect sensor or relocate the unit

3. controls set incorrectly

Readjust sensor angle or control knob

4. Lamp blown

check lamp functions and replace if necessary

5. Lamp not fitted correctly

Make sure the lamp is correctly seated in the 

lampholder

6. Wired incorrectly

check wiring and confirm its wired as per the 

wiring diagram

7. sensor positioned in wrong direction

Adjust angle and direction of PIR for best results 

walk across beam

Light switches on for no 

apparent reason (false 

trigger)

1. Heat from lamp body activating sensor

Adjust PIR sensor or floodlight to allow a 

minimum gap of 40mm between floodlight body 

and sensor head

2.  Heat sources such as air-con, vents, heaters, flues, 

other outside lighting, moving cars trees or shrubs 

are activating sensor

Adjust direction of sensor head away from these 

sources. Reduce sensitivity (if available)

3. Animals / birds activating sensor

Redirecting sensor head may help (Reduce 

sensitvity settings)

4.  Interference from on/off switching of electric 

fans or lights on the same circuit as your security 

floodlight. 

(This problem does not always occur but a faulty 

switch or noisy fluorescent light may cause the 

security floodlight to switch on)

should the false triggering become, troublesome, 

consider:
(a) Replacing a faulty switch
(b)  Replacing noisy fluorescent tubes and/or 

starters

(c)  connecting the floodlight to a separate 

circuit (in most cases where one or more of 

the above suggestions have been carried out, 

false triggering has been reduced)

5.  Reflection from swimming pool, or reflective 

surface such as smooth white walls 

Redirect sensor

Light remains on

1. continuously false triggered

Redirecting sensor head may help

2. Time is set too long

Reduce time

Light remains on at 

nighttime

Possible heat source in detection zone

cover PIR sensor lens with a thick cloth, if the 

light turns off check detection area for heat or 

reflective source, reposition head and decrease 

the sensitivity setting if this control is available

Light switches on during 

daylight hours

LUx control knob is set to daylight position

Turn the LUx control knob to desired light level 

setting

When setting the lux 

controls in daylight 

the detection distance 

becomes shorter

Interference by sunlight

Re-test at night

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