GL0052-03
– Envireau Mono-Tech Rainwater – Installation & Operation Guidelines
Page 11
NOTE. If you have extended the pump cables and have used oversized, armoured or solid conductors to
achieve this you must convert to the previously specified cable size using a joint box before entering the
control unit. A suitable pump isolator switch is often used as a convenient joint box.
You are now ready to install and connect the
depth sensor
(often referred to as just
sensor
)
14)
Refer to the Guide Sheet DIAGRAM C
.
The
depth sensor
is a robust item but must not be subjected to excessive impact, crushing or stretching of
the attached cable. To avoid these occurrences it is the last item to be installed.
NOTES
a) the sensor cable is of a pre-ordered length which you have checked upon receipt.
b) it is not advisable to extend this cable by jointing. If it is absolutely necessary you must ensure that any
joint is watertight and accessible.
c) there must be no jointing of this cable in the tank turret.
d) any use of cable not supplied by Envireau for the express purpose must be of a similar specification. The
minimum specification is 4 core (16/0.2mm per core, red, yellow, green, blue or numbered) screened by
braid or SWA. The outer insulation must be rated at 240v rms.
e) the screen or SWA must be earthed at the control unit end only and must be electrically continuous with
the screen on the sensor cable supplied.
To
install
the
sensor
, uncoil the cable fully and straighten on the ground surface. You are not advised to cut
the cable to length at this stage. It is important that this cable is not unduly stretched so lubricate if
necessary. Draw
all
the cable through the duct, along with another draw-wire (or rope) for future use if
necessary, until there is a
minimum
of
three metres
of cable in the tank turret.
Do not leave excessive
unused cable coiled in the turret or chamber.
It is a trip hazard. Be safe.
Do
not
lower the
sensor
into the tank at this stage. Secure the sensor temporarily to the fitted turret bracket,
out of the water.
Once the cable is through the duct it should be terminated in the
control unit
after cutting to length. Discard
the unused cable. The sensor cable cores should be connected in to the sensor terminal block. This terminal
block is below the display terminals, upper right (facing) on the PCB. The terminals are marked R for the
RED core, Y for the YELLOW core, Bu for the BLUE core and Gn for the GREEN core.
