Emerson COPELAND EAZYCOOL Manual de instrucciones
RGL_Unit_CO2_PT5/E/Rev00 1/5
Date of last update: Mar-20
Ref: RGL_Unit_CO2_PT5/E/Rev00
Application Engineering Europe
COPELAND EAZYCOOL™ CO2 REFRIGERATION UNIT
FLASHTANK PRESSURE TRANSDUCER REPLACEMENT
This installation guide gives instructions for the replacement of the pressure transducer placed on the liquid receiver
on Copeland EazyCool™CO2refrigeration units. The PT5 replacement kit makes it possible to install a pressure
transducer into the compressor compartment of the CO2unit, instead of the flashtank shut-off valve where it was
placed originally. This installation guide describes the main working steps and provides some useful tips.
1 Main steps
1. Switch off the main switch to shut the unit down.
2. Isolate the unit from the cooling circuit by closing the shut-off valve on compressor discharge and the shut-off
valve on flashtank.
3. Remove pressure (charge) from the liquid receiver of the unit including the whole discharge line and the
gascooler.
4. Install the PT5 kit as per instructions below.
5. Switch on the main switch.
6. Check the functioning of the new pressure transducer on the visograph display.
7. Perform a leakage test.
8. Insulate the Schraeder connection as per instructions below.
9. Put the device into operation.
2 Kit contents
A. Brazed set including PT5 pressure transducer, high-pressure hose and rubber stepper plug
B. Bracket
C. Plastic clamp Ø 19 mm
D. Fasteners
E. Plug 1/4" NPT
F. Copper seal to high-pressure hose
G. Insulation set (insulation pipe and insulation tape)
Figure 1
A
B
E
C
F
D
G
RGL_Unit_CO2_PT5/E/Rev00 2/5
3 Disassembling the parts of the CO2unit
Caution: Make sure that there is no pressure in affected unit parts!
1. Disconnect the cable connector from the old pressure transducer and remove the PT5 from the port of the shut-
off valve. Use a 1/4" NPT plug (E) with sealing glue (Loctite) to blind the shut-off port.
Tighten the 1/4" NPT plug (E) to a tightening torque of 40 Nm.
2. Remove the plastic plug from the metal partition wall.
3. Remove the currently used plug on the Schraeder valve (SAE 1/4" on the shut off valve).
Figure 2
1
2
3
RGL_Unit_CO2_PT5/E/Rev00 3/5
4 Assembling the spare pressure transducer kit
1. Pull the brazed set with the pressure transducer (A) through the hole in the partition wall into the compressor
compartment area - see result in compressor compartment area in Figure 4.
2. Pull the cable of the old pressure transducer through the hole in the partition wall into the compressor
compartment area. - see result in compressor compartment area in Figure 4.
3. Blind the partition wall with the rubber stepper plug on the brazed set.
4. Install the assembly bracket for the brazed set [Key 13 mm] –see Figure 4.
Figure 3
Figure 4: Compressor compartment area and assembly bracket
1
Assembly bracket
RGL_Unit_CO2_PT5/E/Rev00 4/5
5. Fasten the brazed set to the bracket using the plastic clamp (C) [Key 10 mm] –see Figure 5.
The plastic clamp can be placed in two different positions (Figures 5 & 6) because the partition wall is available
in two different versions, with the holes located in different positions.
Figure 5 Figure 6
6. Connect the high-pressure hose with the Schraeder port on the shut-off valve of the liquid receiver as per
Figure 7. Use the copper seal (F).
The high-pressure hose must be placed freely so that the Schraeder connection is not strained. The Schraeder
connection must be tightened to a torque of 16 to 18 Nm. Do not exceed 20 Nm in any case [Key 14 mm].
Figure 7
RGL_Unit_CO2_PT5/E/Rev00 5/5
7. After leak test has been performed, insulate the Schraeder connection, including the angle fitting of the high-
pressure hose, using the insulation set (G) –see Figures 8 and 9.
Figure 8 Figure 9
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