FPG visair+, Руководство по эксплуатации продукта

Страница: 26 / 40

Part No. 20862 Rev. G February 2015
- 26 - Chilled Cabinets
Refrigeration Equipment
cont.
CABINETS - SERVICING
Air Ducts and
Grills
All air ducts and grills must be regularly
vacuumed, to keep them free of dust and fluff.
This is best done with the condenser fans
withdrawn, and after cleaning the radiator with
compressed air.
Grills are located on the top of the cabinet and
along the top edge of the front bottom panel.
Temperature
Regulator The Carel MPX PRO regulator consists of
two parts. A circuit board, mounted inside
the control gear chassis, and an
indicator/control panel on the front of the
chassis.
The regulator controls the cabinet
temperature, the defrost cycles and monitors
cabinet operation.
The unit is factory set as per the table in the Specification section.
Two temperature probes are used to control the defrost cycles, one in contact
with and the other adjacent to the evaporator coils.
A third probe monitors the temperature of the air leaving the condenser radiator.
MPX PRO
Controller
Adjustment
Caution:
This controller
should only be
adjusted by a
qualified service
technician.
The indicated temperature will be lower than
the air temperature inside the cabinet,
because the refrigeration compressors are
controlled in response to the exit air
temperature from the evaporator cooling
coils.
A second probe is inserted in the fins of the evaporator coil. This provides
temperature information to control the defrost functions.
Incorrect adjustment or accidental movement of the probes can cause the fins
to ice up, resulting in reduced airflow and poor performance.
Continued on next page