120
to the water outlet joint to discharge condensation water from the ODU during heating.
7. Connection of Connecting Pipe
7.1 Length and level difference requirements for the pipe connections of IDU and ODU
Product Model
Maximum length(m)
Maximum level difference(m)
Maximum number of bends(m)
ICHD009(12)J0A-DMG026(35)
15
10
5
ICHD018(24)J0A-DMG053(71)
25
15
15
ICHD031(36,42)J0A-DMG090(105,120)
30
20
15
ICHD048(60)J0A-DMG140(160)
50
25
15
Notes:
If the height difference is greater than the allowed level difference, it is recommended to place ODU above the IDU.
Caution:
• Do not let air, dust, or other particles invade the pipeline system during installation of the connecting pipes.
• Install the connecting pipes only when the indoor and outdoor units are secured.
• Make sure to keep the connecting pipes dry during installation so that no water will enter the piping system.
• Connecting copper pipes must be wrapped with insulation materials (thicker than 10mm, the thickness
should be increased if the unit is installed in a closed humid place).
7.2 Steps of pipe connection
Measure the required length of the connecting pipe. Make the connecting pipe using the following method (see
the column Pipe Connection for details).
1. Connect the IDUs before the ODU.
• Bend and arrange pipes carefully without damaging the pipes and their insulating layers.
• Before tightening the flare nut, apply refrigerant oil on the outer surface at the pipe flaring position and the
conical surface of the connecting nut (the refrigerant oil used must be compatible with the refrigerant of this
model), and screw it 3 to 4 turns with your hand to tighten it as shown in the figure below.
• When connecting or removing a pipe, use two wrenches at the same time.
• Do not put the weight of the connecting pipe on the connector of the IDU. Otherwise, the heavy weight will
deform the connector and affect the cooling (heating) effect.
2. The check valve of the ODU should be completely closed (e.g. the ex-factory condition). Unscrew nuts from
the check valve in each connection, and connect the flared tube immediately (within 5 minutes). When the nut
at the check valve is removed and placed for too long, dust and other sundries may enter the pipeline system
and cause failures at a later time.
Seal ring
Water outlet joint
ODU chassis
Water outlet
hole of ODU
chassis
Water
outlet joint
Seal ring
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...
