Helios EDTW Montage- Und Betriebsvorschrift Seite 5

Differential temperature controller EDTW
INSTALLATION AND OPERTING INSTRUCTION
NO. 95 101-000
To ensure saftey please read the following instruc-
tions carefully before proceeding.
RECEIPT
Please check consignment immediately on receipt for
accuracy and damage. If damaged, please notify carri­
er immediately. Delay in notification may invalidate any
possible claim.
STORAGE
The storage area must be dry and free from vibrations
or variations on temperature.
Damage due to transportation, storage or improper in­
stallation and operation and not liable for warranty.
APPLICATION
This device allows to minimise a temperature diffe­
rence between high and low temperature levels in lan­
ge buildings. The device is supplied with two tempera­
ture sensors.
EDTW can be used automatically or manually.
Automatic operation mode:
• If the control knob is set in the fully anticlockwise
position, minumum fan speed occurs when the dif­
ference in high and low lovel temperatures is 3 °C or
less; maximum speed occurs when the difference is
6 °C or more.
• If the control knob is set in the fully clockwise positi­
on, minimum fan speed occurs when the difference
in high and low level temperatures is 10 °C or less;
maximum speed occurs when the difference is 13
°C or more.
• To reduce the temperature difference at which the
fan speed will vary, turn the control knob anticlock­
wise. Increase by turning clockwise.
Manual operation mode:
• To reduce the fan speed, turn the knob anticlockwi­
se. To increase the fan speed, turn it clockwise.
Automatical and manual oparation mode:
• The fan comes on automatically at full speed for
the first 10 seconds before reverting to the speed
selected.
• The EDTW can be either surface or flush mounted
using the metal wall box supplied.
INSTALLATION OF THE CONTROLLER
These installation instructions are for the installation of
the controller when used in combination with Helios
supplied fans.
ATTENTION! The controller must be installed to
fixed wiring. Ensure the main electrical supply
matches the rating shown on the controller ca-
sing.
• This device has to be earthed!
All installation must be carried out by a qualified
electrician.
Never work on the unit unless it is isolated from the
main supply. The installation may only be carried out by
a qualified electrician. Relevant regulations (VDE 0100
and VDE 0700 as well as TAB's of the EVU's and UW)
have to be kept up. Also attend the operation and in­
stallation instruction and other parts in conjunction with
the EDTW.
What the installer needs
• A double pole isolating switch with a minimum con­
tact gap of 3 mm (wall or ceiling mounted).
• Suitably rated 4­core cable to connect the controller
to the fan/s.
• Suitably rated 3­core cable to connect the controller
to the main electrical supply.
ATTENTION! If using flexible cable, suitable
glands
incorporating cable clamps must be fitted to
the knockouts in the controller box. See figure 1.
Where to install the controller?
• Where ambient temperatures are not likely to ex­
ceed 50 °C.
• If installed in a kitchen the controller must not be
mounted immediatelly above a cooker or eye level
grill.
• When intended for use in possible chemical corrosi­
ve atmospheres, consult our customer service.
• If installed in a shower room or bathroom the con­
troller and isolating switch must be situated so that
they cannot be touchen by persons making use of
the bath or shower.
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Where to install the sensor?
• Not Where temperatures exceed 35 °C.
• Pointing away from walls or other obstructions, to
ensure adequate ventilation.
• High level sensor, above fan mounting height.
• Low level sensor, within 1 m of the controller.
• When intended for use in possible chemical corrosi­
ve atmospheres, consult our customer service.
WORKING WITH THE FAN
ATTENTION! If wiring to an existing installation
isolate mains supply and remove applicable fu-
ses prior to any electrical procedure.
Already installed fan:
1. Ensure the power supply is isolated.
2. Disconnect the main connections from the fan's ter­
minal socket or from the terminal block.
3. Remove the existing wiring and make it safe.
Not yet installed fan:
1. Check that the fan electrical rating matches the po­
wer supply.
2. Mount the fans in accordance with the instructions
supplied.
3. Route the four core cable from the controller positi­
on to each fan.
4. Route the three core cable from controller position
to the isolator position.