Peripherals Manual Checkit Refrigeration System Monitor (P/N 508-2000) • 15
Checkit Refrigeration System Monitor (P/N 508-2000)
Overview
The Checkit Refrigeration System Monitor (RSM)
(P/N 508-2000), shown in Figure 11, is a UL listed, in-line
sensor that provides early warning of refrigeration system
problems. In general, an alarm signal sent by Checkit will
indicate any of the following:
• Low refrigerant
• Condenser failure
• High liquid temperature
•Flash gas.
When connected to the Refrigeration Monitor and Case
Control (RMCC) unit, the Checkit sensor continuously
monitors the refrigeration system to ensure efficient, peak
performance and provide invaluable real time notification
of possible system failures. In addition, special software al-
gorithms within the RMCC further enhance Checkit sensor
operation by simultaneously monitoring several system
variables before indicating an alarm condition.
Features
• Easy installation
• Immune to refrigerant type
• Works with conventional or parallel systems
• Maintenance-free
• Protects against product and refrigerant loss
• Detects refrigerant loss from any part of the sys-
tem
Installation
Location
Checkit should be installed in a convenient location on
a horizontal liquid line, preferably between the liquid re-
ceiver and the evaporator. Figure 12 shows typical instal-
lation of the Checkit Sensor Assembly.
Orientation
The Checkit Sensor Assembly has a specific inlet and
outlet to ensure that gas trapped in the vessel is vented
downstream of the sensor. The flow arrow on the Checkit
vessel label shows the correct orientation. In addition, the
sensor holding tube should always be located toward the
top of the vessel. See Figure 12. In addition, the Checkit
canister must be mounted horizontally as shown in Figure
11.
Unit Fitting Sizes
The Checkit vessel is sized to fit a 1-5/8" refrigerant
line. Since refrigerant flow restriction could occur, a by-
pass line is required for lines larger than 1-5/8." See Figure
13. If bypass installation is used, locate Checkit either
above or to the side of the main line. In no instance should
the sensor be mounted below the main line. For lines small-
er than 1-5/8", use a standard reducing fitting to complete
installation.
Figure 11 - Checkit Refrigeration System Monitor
Figure 12 - Typical Checkit Sensor Location
RECEIVER
EVAPORATOR
CONDENSER
COMPRESSOR
CHECKIT
To Next Page
Loading...