INVENTOR U4MRS-12 User manual

• SERVICE MANUAL
ENGLISH
AIR CONDITIONING SYSTEMS
LCAC

Contents
Contents i
Part 1 General Information .................................................................................................... 1
Part 2 Indoor Units ................................................................................................................. 7
Part 3 Outdoor Units .......................................................................................................... 119
Part 4 Installation ............................................................................................................... 132
Part 5 Electrical Control System....................................................................................... 171
※The specifications, designs, and information in this book are subject to change without notice for
product improvement.
MODELS:
U4MRS-12/V4MDI-12, U4MRS-12B/V4MDI-12B,
U4MRS-18/V4MCRI-18, U4MRS-18/V4MDI-18UR,
U4MRS-24/V4MCI-24UR, U4MRS-24/V4MKI-24UR,
U4MRS-24/V4MDI-24UR, U4MRS-36/V4MCI-36UR,
U4MRS-36/V4MKI-36UR, U4MRS-36/V4MDI-36UR,
U4MRT-42/V4MCI-42, U4MRT-42/V4MDI-42,
U4MRT-50/V4MCI-50UR, U4MRT-50/V4MDI-50,
U4MRT-60/V4MCI-60UR, U4MRT-60/V4MDI-60,
V4MFO-50/V4MFI-50, V4MFO-66B/V4MFI-66B

General Information
General Information 1
Part 1
General Information
1. Model Lists...........................................................................................2
2. External Appearance...........................................................................4
2.1 Indoor Units............................................................................................................... 4
2.2 Outdoor Units............................................................................................................ 5

Model Lists
General Information 2
1. Model Lists
1.1 Indoor Units
R410A (capacity multiplied by 1000Btu/h)
Type
Function
12
16
18
24
30
36
42
48
55
Super slim cassette
Cooling and heating
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A5 Duct
Cooling and heating
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A6 Duct
Cooling and heating
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Ceiling-floor
Cooling and heating
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Four-way
cassette(compact)
Cooling and heating
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Console
Cooling and heating
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Floor-standing
Cooling and heating
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Floor-standing
Cooling and heating
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1.2 Outdoor Units
Universal Outdoor unit Model Compressor type Compressor Brand Matched indoor units
Rotary GMCC V4MDI-12
U4MRS-12B Rotary GMCC
Rotary GMCC
Rotary GMCC
V4MDI-12B
V4MCRI-18
V4MDI-18UR
V4MCI-24UR
V4MKI-24UR
V4MDI-24UR
Rotary GMCC
V4MCI-36UR
V4MKI-36UR
V4MDI-36UR
U4MRS-24
U4MRS-18
U4MRS-36
Rotary GMCC V4MCI-42
V4MDI-42
U4MRT-42
Rotary GMCC V4MCI-50UR
V4MDI-50
U4MRT-50
Rotary GMCC V4MCI-60UR
V4MDI-60
U4MRT-60
Rotary GMCC V4MFI-50
V4MFO-50
Rotary GMCC V4MFI-66B
V4MFO-66B

Model Lists
General Information 3

External Appearance
General Information 4
2. External Appearance
2.1 Indoor Units
Super slim cassette Duct
Ceiling-Floor Compact Four-way cassette
Console Floor-standing
Floor-standing

External Appearance
General Information 5
2.2 Outdoor Units
Single fan outdoor unit
Double fan outdoor unit

Indoor Units
Indoor Units 7
Part 2
Indoor Units
Super Slim Cassette Type...................................................8
A5 Duct Type......................................................................23
A6 Duct Type......................................................................39
Ceiling & Floor Type ..........................................................57
Four-way Cassette Type (Compact).................................73
Console Type .....................................................................83
Floor-standing Type..........................................................96
Floor-standing Type .......................................................108

Super Slim Cassette Type
Indoor Units 8
Super Slim Cassette Type
1. Features ...........................................................................9
2. Dimensions ....................................................................12
3. Service Space ................................................................13
4. Wiring Diagrams ............................................................14
5. Air Velocity Distributions (Reference Data).................15
6. Electric Characteristics.................................................18
7. Sound Levels .................................................................19
8. Accessories....................................................................20
9. The Specification of Power...........................................21
10. Field Wiring ..................................................................22