Electric Connection - Omega OTEC IEMP-D Series Technical Manual

Adding Refrigerant
• If the one-way pipe length is less than 5m (including 5m), the refrigerant charging amount is determined
according to the nameplate.
• If the one-way pipe length exceeds 5m, it is necessary to calculate the refrigerant charging amount according
to the pipe diameter and length of the liquid-side pipes of the IDU and ODU. See the table below for details.
• Record the amount of refrigerant charged and retain the record for use during future maintenance.
Diameter of liquid-side pipe
Φ6.4
7.7 Leak detection
Use soapy water or a leak detector to check whether air leaks at each joint.
The low pressure check valve is indicated by A in the figure.
B indicates the high pressure side check valve.
C and D indicate IDU connecting pipe ports.
IDU check point
Electric box cover
ODU check point
7.8 Check Valve Instructions
• Open the valve plug until it touches the limit block. Do not
attempt to continue opening it.
• Use a wrench or similar tool to fasten the valve cap.
• See the torque table for the valve cap fastening torque.
7.9 Heat insulation
• The exposed flared tube connection portion and the refrigerant tube portion of the liquid pipe and the gas
pipe must be wrapped with the heat insulation material with no gap in between.
• Insufficient insulation may cause condensation and water dripping.

8. Electric Connection

8.1 Caution
◼ Before the installation, check whether the power supply of the user meets the electrical installation
Multimeter Pressure gauge
-755mmHg
Lo handle
Charging hose
Refrigerant charging amount
D
C
B A
Pipe size
Φ6.4
Φ9.5
Φ12.7
Φ15.9
Φ19.1
Manifold valve
Hi handle
Charging hose
Vacuum pump
Low pressure valve
11.5g(L-5)
14.2~17.2 N.m (144~176 kgf.cm)
32.7~39.9 N.m (333~407 kgf.cm)
49.5~60.3 N.m (504~616 kgf.cm)
61.8~75.4 N.m (630~770 kgf.cm)
97.2~118.6 N.m (990~1210 kgf.cm)
123
Remarks
L is the one-way pipe length
Tightening torque N.m