Operation; Controller General Description - U-Line UCFZ553-SS71A User Manual

3. OPERATION

Before switching ON the unit, check that the electrical connections have been made correctly and
above all, that the ground connection is available and working properly.
Please read before using this manual
- This manual is part of the product and should be kept near the instrument for easy and
quick reference.
- Digital controller with defrost and fans management shall not be used for purpose different
from those described hereunder. It cannot be used as a safely device.
- Check the application limits before proceeding.
Safety precautions
- Check the supply voltage is correct before connecting the instrument.
- Do not expose to water or moisture: use the controller only within the operating limits
avoiding the temperature changes with high atmospheric humidity to prevent formation of
condensation.
Warning
- Disconnect all the electrical connections before any kind of maintenance.
- In case of failure or faulty operation contact technical service or Dealer.
- Consider the maximum current which can be applied to each relay.
- Ensure that the wired for probes, loads and the power supply are separated and far enough
from each other, without crossing or intertwining.

3.1 CONTROLLER GENERAL DESCRIPTION

compressor activation, the "Pb2" defined as "Evaporator probe" and used to control the evaporator
fan operation and the defrost cycle; The device has also an additional input configurable as
analogue input ("Auxiliary probe" Pb3) or digital input ("Door switch/multi-function input")
Technical Data
Heat and fire resistance category: D.
Connections: Removable screw terminal blocks for wires up to 2,5 mm
connectors; Pico-blade connectors.
Maximum length allowed to the connection cables: 10 meters (32,8ft) for power supply cord;
10 meters (32,8ft) for Analogue inputs; 10 meters (32,8ft) for Digital inputs; 10 meters (32,8ft) for
Digital outputs.
Operating temperature: from -5°C to 55°C (from 23 to 131°F)
Operating humidity: Relative humidity without condensate from 10 to 90%.
Pollution status of the device: 2.
The controller is a microprocessor based controller suitable for normal
and low temperature air- ventilated application with a membrane
keyboard. The controller has dimensions 101 x 67 x 47 mm, while the
keyboard has dimensions 200 x 82 millimeters, six electro-mechanical
relays.
The controller is also provided with 2 probe inputs either NTC or PTC
type: the probe "Pb1" defined as "Control probe"
Use and Operational Manual
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OPERATION
and used for the
2
; Micro-MaTch
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