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nuaire.co.uk
029 2085 8400
28. 03. 19. Document Number 671445
The EMC Directive
2014/30/EU
The Low Voltage
Directive
2014/35/EU
MRXBOX95-HUM
Low Voltage Humidistat Sensor
Installation and Maintenance
IMPORTANT! Please refer to the installation
instructions of the fan to check the compatibility of
this sensor.
1.0 Introduction
Designed to be compatible with the Ecosmart system,
this humidistat unit is supplied with a pre-plugged, 10
metre length of communications cable. Note: longer
lengths are available if required.
The sensor operates with low voltage with power
supplied from the fan unit via the communications cable.
The Humidistat will enable the Ecosmart fan when the
measured humidity level is 2% above the set point and
will stop the fan when the humidity is at or below set
point.
1.1 Parts Check List
•
MRXBOX95-HUM Humidistat Sensor
•
1 off 10 metre length of plugged cable
2.0 Installation
2.1 Installing the Sensor
The sensor unit should be installed away from any direct
source of heat (e.g. radiators) and areas where it would
be subjected to water spray.
The Sensor is supplied complete with 10 metres of
connecting cable with plugs attached. Sensors are also
supplied with all fixings and are clipped into a back plate
wall mounting bracket.
•
Fix one end of the 10m cable to the Ecosmart
connection point.
•
Select a suitable location for the sensor and arrange
the cable in position. Leave approx. 75mm of
the cable free at the mounting point to ease the
connection of the plug (Figure 1).
•
Carefully separate the sensor from the back plate
using a small screwdriver (Figure 2) Note: the
sensor will remain connected by its internal cable.
•
Release this cable from the bracket by simply
pulling the plug off the socket pins in the back plate.
•
Before fixing the back plate to the wall, connect the
wall fixed cable end plug to the upper set of pins on
the bracket (Figure 3).
Note: Ensure the colour code matches
when
fitting the plug onto the pins.
•
Arrange the cable so it lies in the cable slot at the
top of the back plate moulding and fix the bracket
to the wall surface using the screws supplied.
•
The sensor plug can now be connected into the
back plate Note: check the colour code matching
when fitting the plug onto the pins. Clip the sensor
body in the back plate arms and adjust the sensor
body to the desired position.
2.2 Data Cable Installation
A 4-core data cable is used to connect
devices.
Do not run data cable in the same
conduit as the mains cables and ensure
there is a 50mm separation between
the data cable and other cables. The
maximum cable run between any two
devices is 300m when it is installed in
accordance with the instructions.
Please note that the total data cable
length used in any system must be less
than 1000m. Keep the number of cable
joints to a minimum to ensure the best
data transmission efficiency between
devices.
3.0 Operation
3.1 Adjusting Sensor Set Points
(65-85 %RH)
Assuming the sensor(s) are installed,
adjustment of the set points achieved
by tilting the sensor forwards which
exposes the adjustment aperture
(Figure 5).
Using a small screwdriver, gently turn
the dial either clockwise or anti-
clockwise to increase or decrease the
set point.
When adjustments are made to the
sensor, the LED light on the sensor
front will flash on and off to show
the set point. First, green flashes will
indicate the set point in TENS and then
red flashes will indicate UNITS.
For example seven green flashes and
three red flashes show a RH set point
of 73%.
4.0 Maintenance
The unit does not require any
maintenance. However, for optimum
performance, it is advisable to remove
any accumulated dust with a low
power vacuum cleaner.
NOTE: Installation and Maintenance
of the equipment must be as
directed in the instructions provided
with the unit.
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Fixing screws supplied
Fixing screws supplied
Set point
adjuster screw
10m sensor connection
wire (supplied).
To Ecosmart
connection point
Clearance aperture for wire
should be approximately 20mm
Ø to allow passage of plug end.
Allow 75mm of wire through
for fitting to the back plate.
Wire can be located behind
a wall panel or fixed to wall
surface.
Small screwdriver
Back plate
(rear view)
Plug end
Note colour
code guide
label when
fitting.
Wall