24
- Interlocked contactors with a thermal relay are recommended for use to
protect against over-current.
• The instructions in current regulations regarding the protection of electrical lines
against defects and direct and indirect contact must be obeyed at all times.
• After these steps are performed, check to make sure all electrical connections
are secure (loose wiring connections can cause irreparable damage).
• Check to make sure the electrical resistance between earth and any electrical
terminal is greater than 1 megohms. If it is not, do not start up the unit until the
electrical short has been located and repaired.
• As a safety measure, if there is no power to the fan, the necessary interlocks must
be performed so that all other electrical components are also de-energised.
- The motors must be connected following the instructions in the wiring
schematics for the terminal boxes for the various motors. The equipment
has glands on the sides where the power is connected for running power
cables to the motors.
- A power outlet, fuse or “U” curve thermo-magnetic breaker must be insta-
lled for each fan, which will protect each power line in the even of a short
circuit.
- The general power line must have a fuse or “U” curve thermo-magnetic
breaker that will protect the mains power in the event of a short circuit.
7.10. TEMPERATURE PROBES LOCATION
The UTBS-PRO-REG units are supplied with all the temperature probes required to be
installed in any type of operation.
All the versions include 3 different temperature probes to manage air heating and/or coo-
ling demand:
- T
SUP
: Supply air temperature. Mounted at the UTBS module air outlet. Factory wired, this
probe is used to control the supply air temperature. This sensor should not be manipu-
lated.
- T
ODA
: Outdoor air temperature. This probe is delivered inside the electric cabinet (coiled
itself). Although the probe is factory wired to the PCB controller, the installer must fi t the
sensor inside the duct system depending on the type of installation performed.
- T
ETA
: Extract air temperature. This probe is delivered inside the electric cabinet (coiled
itself). Although the probe is factory wired to the PCB controller, the installer must fi t the
sensor inside the duct system depending on the type of installation performed.
Outdoor air (ODA) and Extract air (ETA) temperature probes are 4m lengh, allowing that
each probe will be mounted in the desired position.
IMPORTANT:
Regardless of the type of installation performed, the three air probes must
always be wired to the control cabinet. If any of the temperature probes is missing, it will
cause the unit malfunction as well as the alarm message on the controller display.
Detail of the location of the Outdoor Air temperature probe (TODA) and the Extract Air tem-
perature (TETA) depending on the type of installation:
Содержание UTBS PRO-REG Series
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