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Date of last update: Aug-22
This technical information provides instructions for the replacement of the changeover valve on Copeland CO
refrigeration units. These instructions are valid only for Copeland CO
PRV's connected to the liquid receiver through the changeover valve. If the pressure relief valves (PRV's) cannot be
disassembled from the changeover valve, it is necessary to replace the complete assembly (changeover valve +
PRV's). The PRV version with metric thread M24x1.5 cannot be used anymore. The PRV on the high-pressure side
is not affected by this change.
The service kit N°3290262 includes the components shown in the table below.
Components
Valve-Change-Over 1/2"NPT
Valve-Safety assm 90 bar
User manual - CV Kit
Table 1: BOM of changeover valve service kit
When replacing the changeover valve including PRV's, the instructions in this technical information must be carefully
followed. Use the recommended torque at each step.
Only qualified and authorized HVAC or refrigeration personnel are permitted to conduct the changes described in
this technical information. All appropriate safety measures must be considered.
Replacement of changeover valve:
▪ Release all the pressure/refrigerant from the unit (Figure 1).
▪ Disassemble the changeover valve from the liquid receiver (Figure 2).
▪ Connect a nitrogen hose to the liquid receiver so that no thread debris can fall into it (Figure 3).
▪ Clean the liquid receiver thread (Figure 3).
Figure 1
Figure 2
TI_Unit_CO2_Stream_04_EN_Rev00
C
™ CO
OPELAND
C
HANGEOVER
Description
Changeover valve
Pressure relief valve (PRV)
Instruction
Ident number 3293976 (P/N 900-0010-00/Rev00)
R
EFRIGERATION
2
V
S
ALVE
ERVICE
refrigeration units with M24x1.5 thread on the
2
Quantity
1
2
1
Figure 3
Ref: TI_Unit_CO2_Stream_04_EN_Rev00
Application Engineering Europe
U
NITS
K
IT
Ident & Part
number
3290262
510-1018-00
3288776
(510-0902-01)
3293976
(900-0010-00)
2
1/3
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Summary of Contents for Emerson Copeland 3290262
- Page 1 Date of last update: Aug-22 Ref: TI_Unit_CO2_Stream_04_EN_Rev00 Application Engineering Europe ™ CO OPELAND EFRIGERATION NITS HANGEOVER ALVE ERVICE This technical information provides instructions for the replacement of the changeover valve on Copeland CO refrigeration units. These instructions are valid only for Copeland CO refrigeration units with M24x1.5 thread on the PRV’s connected to the liquid receiver through the changeover valve.
- Page 2 ▪ Apply teflon sealing tape (0.1x12 mm) to the changeover valve by 5 to 6 turns clockwise (Figure 4). ▪ Mount the changeover valve onto the liquid receiver; torque to 50 Nm (Figure 5). ▪ Apply teflon sealing tape (0.1x12 mm) to both NPT PRV‘s by 5 to 6 turns clockwise (Figure 6). Figure 4 Figure 5 Figure 6...
- Page 3 - Emerson does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson product remains solely with the purchaser or end user.