123
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
Refrigerant charging amount
Remarks
Φ6.4
11.5g(L-5)
L is the one-way pipe length
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.
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.
Pipe size
Tightening torque N.m
Φ6.4
14.2~17.2 N.m (144~176 kgf.cm)
Φ9.5
32.7~39.9 N.m (333~407 kgf.cm)
Φ12.7
49.5~60.3 N.m (504~616 kgf.cm)
Φ15.9
61.8~75.4 N.m (630~770 kgf.cm)
Φ19.1
97.2~118.6 N.m (990~1210 kgf.cm)
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
-755mmHg
Manifold valve
Multimeter Pressure gauge
Lo handle
Hi handle
Charging hose
Charging hose
Vacuum pump
Low pressure valve
B
A
D
C
IDU check point
Electric box cover
ODU check point
Summary of Contents for OTEC IEMP-D Series
Page 1: ...IEMP D Series Ducted Fan Coil Technical Manual...
Page 4: ...2 Part 1 General information 1 Model Names of Indoor Outdoor Units 3 2 External Appearance 4...
Page 17: ...17 ICHD031J0A DMG090...
Page 18: ...18 ICHD036J0A DMG105 ICHD042J0A DMG120 ICHD048J0A DMG140...
Page 19: ...19 ICHD060J0A DMG160...
Page 29: ...36 IEMP031J3A DCG090 IEMP060J3A DCG160...
Page 30: ...37 IEMP036J3A DCG105 IEMP042J3A DCG120 IEMP048J3A DCG140...
Page 86: ...126 IEMP031 36 42 48 60 J3A DCG090 105 120 140 160...
