Emerson Copeland EazyCool OME-4MTL-09X, Инструкции по применению

Страница: 18 / 71

C6.1.11/0718-0619/E 13
glass) to the liquid line outlet of the unit is approved for an absolute pressure of 90 bar at
standstill too.
▪
A ½" fitting is pre-installed in the suction line for an additional pressure relief valve.
▪
The area with discharge pipe, condenser/gas cooler and high-pressure regulation valve is
approved for a maximum allowable absolute pressure of 120 bar.
Figure 14: Design pressures of CO
2
unit
NOTE: The design pressure Ps is a safety-related value. The restrictions for reliable operation
of the unit are defined by the application envelope which can be found in Select software at
www.climate.emerson.com/en-gb .
2.8 CO
2
Unit control
– General
Copeland EazyCool CO
2
refrigeration units are equipped with an iPro controller (IPR215D) and a
Visograph display. The iPro controller manages the compressor variable frequency drive through 0-
10V and a digital signal. It also handles the high-pressure regulation which is done by a stepper
motor valve, driven by a standard driver device, controlled by iPro through CAN BUS. The stepper
motor valve driver can operate two valves simultaneously. The controller can handle gas cooler
pressure and liquid receiver pressure in parallel.
Figure 15: CO
2
unit controller schematics
IPR215D
Visograph