IMI 550 SERIES User manual

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TECHNICAL MANUAL
for 550 SERIES CONDENSING UNITS
and 542 SERIES DUCTED CONDENSING UNITS
from IMI AIR CONDITIONING LTD
This manual provides technical and installation information for 550 series condensing units and 542 series ducted
condensing units.
INDEX PAGE
GENERAL
Specification details 2
Features and options 3
Part numbers 3
Dimensions and weights 4
SELECTION MCU / MCU+ performance data 5
DCUE performancedata 6
INSTALLATION MCU/ MCU+ 550 series 7
DCUE 542 series 9
Application, pipe sizing 11
Pipe connections 12
Electrical connections 12
Evacuating and charging 13
WIRING MCU14
DIAGRAMSMCU+ 15
DCUE 16
KITSPTC:1 phase units 17
CSR:1 phase MCU/ MCU+ 550 series 18
CSR: 1 phase DCUE 542 series 19
Head pressure control - 550 series MCUonly 20
Compressor jacket: MCU/ MCU+ 550 series 22
HP pressure switchesMCU / MCU+ 23
Isolator: DCUE 542 series 25
3 minute timer: 550 series MCUonly 27
Wall mounting MCU/ MCU+ 550 series 28
Wall mounting: DCUE 542 series 30
Overload: MCU/ MCU+ 1 phase 550 series 31
Overload: DCUE 1 phase 542 series 32
Volt free relay 33
Duct: DCUE 542 series 34
Plenum: DCUE 542 series 34
Grille: DCUE 542 series 36
COMPONENT Exploded views of units with 37
IDENTIFICATIONcomponent identification
IMI Air Conditioning Ltd.
Armytage Road, Brighouse,
West Yorkshire. HD6 1QF
Tel: [phone]
Fax: [phone] Asubsidiarycompany of IMI plc
55008275-03
Heronhill - for all your IMI requirements
Tel: [phone]
www.heronhill.co.uk
Fax: [phone]

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IMI AIR CONDITIONING LIMITED - CONDENSING UNITS
SPECIFICATION DETAILS
MCU(+) SIZE 15 20 30 40 50 60 80 90 100 130 150 165 180 200
Nominal cooling capacity ¶ kW 2.5 2.8 3.7 4.2 5.8 7.0 7.4 8.2 10.9 12.4 13.9 14.7 17.1 19.9
R22 Compressor - 1 Ph (230V 50Hz)
Power(nominal) kW0.71.01.21.41.92.32.94.0------
StartingcurrentLRA A21243232586176114------
NominalcurrentFLA A4.15.25.978.59.91116.2------
R22 Compressor - 3 Ph (400V 50Hz)
Power (nominal) kW - - 1.6 2.0 1.9 2.3 2.8 4.0 4.0 4.3 5.2 5.8 6.8 8.9
StartingcurrentLRA A/Ph- - 182226324048516268717198
Nominal current FLA A/Ph - - 3.9 5.1 4.0 4.1 4.5 7.0 7.1 7.6 8.6 9.5 11.6 16.1
R22 charge supplied g 630 980 950 1180 1610 1900 1800 1960 2400 3970 3970 4320 4420 5220
Operating weight kg 1Ph45(39*)46(40*)48(41*)53(45*)64656676------
3 Ph - - 48 53 62 63 64 73 81 101 103 103 118 173
*Obsolete units fitted with a rotary compressor
R407C Compressor - 1 Ph (230V 50Hz)
Power(nominal) kW1.11.61.62.12.02.43.04.2------
StartingcurrentLRA A23283650586176114------
NominalcurrentFLA A5.96.98.110.28.99.811.516.9------
R407C Compressor - 3 Ph (400V 50Hz)
Power (nominal) kW - - 1.6 2.0 1.9 2.4 3.0 4.1 4.3 4.4 5.3 6.0 7.0 9.4
StartingcurrentLRA A/Ph- - 182226324048516268717198
Nominal current FLA A/Ph - - 3.6 4.8 4.2 4.2 4.9 7.1 7.2 7.7 8.7 9.5 11.9 16.9
R407C charge supplied g 660 1030 1000 1240 1690 2000 1880 2060 2520 4170 4170 4540 4640 5480
Operating weight kg 1Ph4546485364656676------
3 Ph - - 48 53 62 63 64 73 81 101 103 103 118 173
Connection sizes
Suction ins odf 3/8 3/8 1/2 1/2 1/2 5/8 5/8 5/8 3/4 3/4 3/4 3/4 7/8 7/8
Liquid ins odf 3/8 3/8 3/8 3/8 3/8 3/8 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2
Sound Pressure Levels (SPL) at 3m distance in free field conditions. (Reference 2 x 10-5 N/m²)
Fan speed min dBA4546475051515153545656575656
NC 40 41 42 47 47 46 45 47 48 49 49 51 50 50
Fan speed max dBA5050515354545856606056606161
NC 46 47 48 50 50 50 56 53 56 54 49 55 60 60
MCU(+) SIZE 15 20 30 40 50 60 80 90 100 130 150 165 180 200
Condenser fan (1Ph 230V 50Hz)
Airflow (max speed) m³/s 0.813 0.813 0.813 0.723 0.783 0.783 0.783 1.140 1.140 1.740 1.740 1.740 2.407 2.407
Fan motor rating kW 0.13 0.13 0.13 0.13 0.13 0.13 0.13 0.24 0.24 2 x 0.13 2 x 0.13 2 x 0.13 2 x 0.24 2 x 0.24
Nominal current FLA A 0.6 0.6 0.6 0.6 0.6 0.6 0.6 1.0 1.0 2 x 0.60 2 x 0.60 2 x 0.60 2 x 1.00 2 x 1.00
Fans:- No. x diameter # x mm 1 x 457 1 x 457 1 x 457 1 x 457 1 x 457 1 x 457 1 x 457 1 x 508 2 x 457 2 x 457 2 457 2 x 457 2 x 508 2 x 508
Fans:- max speed r.p.m. 760 760 760 760 910 910 910 950 950 910 910 910 950 950
DCUE SIZE10(Obs)15203040506080
Nominal cooling capacity ¶ kW 2.0 2.6 2.8 3.7 4.6 5.8 6.3 6.9
Compressor - 1 Ph (230V 50Hz)
Power (nominal) kW 0.75 1.00 1.16 1.46 1.87 2.20 2.56 2.95
Starting current LRA A 16 23 28 36 50 51 60 71
Nominal current FLA A 3.4 5.2 5.9 7.2 9.3 10.0 12.0 14.1
Compressor - 3 Ph (400V 50Hz)
Power (nominal) kW - - - 1.45 1.90 2.12 2.52 2.80
Starting current LRA A/Ph - - - 18 22 24 24 27
Nominal current FLA A/Ph - - - 2.7 3.9 4.0 4.2 4.8
Crankcase heater A 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25
R22 charge supplied g 540 570 880 930 990 1250 1140 1400
R407C charge supplied g 570 600 930 990 1050 1240 1190 1480
Connection sizes
Suction ins odf 3/8 3/8 3/8 1/2 1/2 1/2 5/8 5/8
Liquid ins odf 3/8 3/8 3/8 3/8 3/8 3/8 3/8 1/2
DCUE SIZE10(Obs)15203040506080
Condenser fan (1 Ph 230V 50Hz)
Airflow (max speed) m³/s 0.44 0.44 0.44 0.42 0.38 0.53 0.53 0.48
Max external resistance Pa 100 100 100 100 100 100 100 100
Fan motor rating kW 0.34 0.34 0.34 0.34 0.34 0.34 0.34 0.34
Starting current A 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0
Nominal current FLA A 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.6
Operating weight kg 66 69 70 70 72 81 81 84
Sound Pressure Levels (SPL) at 3m distance from unit in ceiling void. (Reference 2 x 10-5 N/m²)
Fan speed min dBA3535353535444444
NC 28 28 28 28 28 31 31 31
Fan speed max dBA5252525252545454
NC 46 46 46 46 46 48 48 48
¶ Nominal capacities quoted at 7.5/C saturated suction temperature and 35/C air onto the condenser.
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STANDARD FEATURES AND OPTIONS
MCU = standard condensing unit MCU+ = standard condensing unit + head pressure control + low pressure switch
DCUE = electronic controlled ducted condensing unit + head pressure control + HP and LP switches
CONDENSING UNIT MODEL MCU MCU+ DCUE
Easy access for installation and service 99 9
Suction and liquid service valves 99 9
Expansion device (orifice type) 99 9
Pre-charged with refrigerant (R22 or R407C) 99 9
Heat pump version available 99 9
Ducted air inlet and/or discharge -- -- 9
Ceiling suspendable -- -- 9
Capacitor start relay (1phase) (MCU(+) 15 - 40, ALL DCUE) * * *
PTC resistor (1 phase) * * *
Head pressure control * 99
LP cut-out * 99
HP cut-out auto (DCUE has manual backup) * 99
Isolator * * *
3 minute start time delay * 99
Wall mounting brackets * * *
Contactor 99 9
Overload (standard on 3ph) * -- *
Low ambient start -- -- 9
9= Standard Feature, * = Option
PART NUMBERS
MCU/MCU+ CONDENSING UNITS
MCU 1Ph
Rotary (Obs) MCU 15 MCU 20 MCU 30 MCU 40 MCU 1Ph Recip MCU 15 MCU 20 MCU 30 MCU 40
R407C -- -- -- -- R407C 55022045 55022046 55022047 55022048
R22 55099066 55099067 55099068 55099069 R22 55022151 55022152 55022153 55022154
MCU 1Ph
Scroll MCU 50 MCU 60 MCU 80 MCU 90 MCU 3Ph Recip MCU 30 MCU 40
R407C 55099049 55099050 55099051 55099052 R407C 55022053 55022054
R22 55022070 55022071 55022072 55022073 R22 55022074 55022075
MCU 3Ph
Scroll MCU 50 MCU 60 MCU 80 MCU 90 MCU 100 MCU 130 MCU 150 MCU 165 MCU 180 MCU 200
R407C 55022055 55022056 55022057 55022058 55022059 55022060 55022061 55022062 55022063 55022064
R22 55022076 55022077 55022078 55022079 55022080 55022081 55022082 55022083 55022084 55022085
MCU+ 1Ph
Rotary (Obs) MCU+ 15 MCU+ 20 MCU+ 30 MCU+ 40 MCU+ 1Ph Recip MCU+ 15 MCU+ 20 MCU+ 30 MCU+ 40
R407C -- -- -- -- R407C 55022002 55022003 55022004 55022005
R22 55099024 55099025 55099026 55099027 R22 55022155 55022156 55022157 55022158
MCU+ 1Ph
Scroll MCU+ 50 MCU+ 60 MCU+ 80 MCU+ 90 MCU+ 3Ph Recip MCU+ 30 MCU+ 40
R407C 55022006 55022007 55022008 55022009 R407C 55022011 55022012
R22 55022028 55022029 55022030 55022031 R22 55022032 55022033
MCU+ 3Ph
Scroll MCU+ 50 MCU+ 60 MCU+ 80 MCU+ 90 MCU+ 100 MCU+ 130 MCU+ 150 MCU+ 165 MCU+ 180 MCU+ 200
R407C 55022013 55022014 55022015 55022016 55022017 55022018 55022019 55022020 55022021 55022022
R22 55022034 55022035 55022036 55022037 55022038 55022039 55022040 55022041 55022042 55022043
Part numbers shown in underlined italics eg 55099066 are obsolete models, shown in this manual for reference only
DCUE DUCTED CONDENSING UNITS (542 Series, reciprocating compressors)
Electronic DCUE DCUE 10 (Obs) DCUE 15 DCUE 20 DCUE 30 DCUE 40 DCUE 50 DCUE 60 DCUE 80
R22 54200001 542000 542000 542000 542000 542000 542000 542000
R407C 54200026 542000 542000 542000 542000 542000 542000 542000
Electronic DCUE 3Ph -- -- -- DCUE 30 DCUE 40 DCUE 50 DCUE 60 DCUE 80
R22 -- -- -- 542000 542000 542000 542000 542000
R407C -- -- -- 542000 542000 542000 542000 542000
Heronhill - for all your IMI requirements
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UNPACKED DIMENSIONS and WEIGHTS
MCU / MCU+ CONDENSING UNITS
Model 15 20 30 40 50 60 80 90 100 130 150 165 180 200
HEIGHT mm 620 620 620 620 720 720 720 820 820 1080 1080 1080 1275 1275
WIDTH mm 900 900 900 900 1000 1000 1000 1000 1000 1000 1000 1000 1100 1100
DEPTH mm 300 300 300 300 300 300 300 350 350 425 425 425 425 425
1 Ph kg 45(39*)46(40*)48(41*)53(45*)64656676------
3 Ph kg - - 48 53 62 63 64 73 81 101 103 103 118 173
* Obsolete R407C Models and R22 models fitted with a rotary compressor
DCUE DUCTED CONDENSING UNITS
Model DCUE 10 (Obs) DCUE 15 DCUE 20 DCUE 30 DCUE 40 DCUE 50 DCUE 60 DCUE 80
HEIGHT mm 560 560 560 560 560 625 625 625
WIDTH mm 1075 1075 1075 1075 1075 1245 1245 1245
DEPTH mm 565 565 565 565 565 565 565 565
WEIGHT kg 66 69 70 70 72 81 81 84
PACKED DIMENSIONS and WEIGHTS
MCU / MCU+ CONDENSING UNITS
Model 15 20 30 40 50 60 80 90 100 130 150 165 180 200
HEIGHT mm 620 620 620 620 720 720 720 820 820 1080 1080 1080 1280 1280
WIDTH mm 980 980 980 980 1080 1080 1080 1090 1090 1090 1090 1090 1215 1215
DEPTH mm 340 340 340 340 340 340 340 390 390 465 465 465 465 465
1 Ph kg 47(41*)48(42*)50(43*)55(47*)66676878------
3 Ph kg - - 50 55 64 65 66 75 83 105 107 107 123 178
* Obsolete R407C Models and R22 models fitted with a rotary compressor
DCUE DUCTED CONDENSING UNITS
Model DCUE 10 (Obs) DCUE 15 DCUE 20 DCUE 30 DCUE 40 DCUE 50 DCUE 60 DCUE 80
HEIGHT mm 580 580 580 580 580 650 650 650
WIDTH mm 1090 1090 1090 1090 1090 1270 1270 1270
DEPTH mm 610 610 610 610 610 610 610 610
WEIGHT kg 71 74 75 76 76 86 86 90
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MCU(+) 15 - 200 CONDENSING UNIT CAPACITIES
MODEL
Air on to
Condenser
/C
Saturated Suction Temperature /C
-2.502.557.510
Cooling capacity and power input kW
Cap. Power Cap. Power Cap. Power Cap. Power Cap. Power Cap. Power
MCU(+) 15
25 1.93 0.69 2.14 0.70 2.35 0.70 2.55 0.71 2.76 0.72 2.96 0.72
30 1.81 0.74 2.01 0.75 2.21 0.76 2.41 0.77 2.61 0.78 2.81 0.79
35 1.69 0.79 1.89 0.80 2.08 0.81 2.27 0.83 2.46 0.84 2.65 0.86
40 1.58 0.84 1.76 0.86 1.95 0.88 2.13 0.90 2.32 0.91 2.50 0.93
45 1.46 0.90 1.64 0.92 1.82 0.94 2.00 0.97 2.18 0.99 2.36 1.01
MCU(+) 20
25 2.25 0.80 2.49 0.81 2.71 0.81 2.96 0.82 3.22 0.84 3.49 0.85
30 2.08 0.84 2.31 0.86 2.54 0.87 2.78 0.89 3.01 0.90 3.26 0.92
35 1.94 0.90 2.16 0.92 2.38 0.93 2.61 0.95 2.84 0.97 3.05 0.98
40 1.83 0.98 2.04 0.99 2.25 1.01 2.46 1.03 2.66 1.05 2.86 1.06
45 1.73 1.07 1.92 1.08 2.11 1.09 2.30 1.11 2.49 1.13 2.68 1.15
MCU(+) 30
25 2.87 1.02 3.22 1.05 3.53 1.06 3.74 1.04 4.12 1.07 4.49 1.10
30 2.71 1.10 3.06 1.13 3.27 1.12 3.51 1.12 3.84 1.15 4.19 1.18
35 2.59 1.20 2.82 1.20 3.03 1.19 3.36 1.23 3.68 1.26 3.79 1.22
40 2.38 1.27 2.71 1.32 2.80 1.26 3.12 1.31 3.32 1.31 3.62 1.35
45 2.11 1.30 2.43 1.36 2.53 1.31 2.84 1.37
MCU(+) 40
25 3.38 1.13 3.70 1.15 4.02 1.16 4.35 1.18 4.67 1.19 5.00 1.21
30 3.19 1.22 3.50 1.24 3.81 1.26 4.11 1.28 4.42 1.30 4.73 1.32
35 3.01 1.31 3.30 1.33 3.59 1.36 3.88 1.38 4.17 1.41 4.46 1.43
40 2.84 1.40 3.11 1.43 3.37 1.47 3.63 1.50 3.89 1.53 4.15 1.56
45 2.68 1.51 2.91 1.55 3.15 1.58 3.38 1.62 3.61 1.66 3.85 1.70
MCU(+) 50
25 4.57 1.87 5.09 2.03 5.51 2.14 5.97 2.25 6.41 2.38 6.79 2.51
30 4.34 1.95 4.75 2.09 5.25 2.19 5.63 2.32 6.04 2.45 6.49 2.58
35 3.94 2.00 4.42 2.13 4.91 2.24 5.29 2.36 5.75 2.49 6.09 2.65
40 3.76 2.05 4.22 2.18 4.58 2.29 5.04 2.41 5.39 2.58 5.69 2.74
45 3.50 2.12 3.93 2.22 4.37 2.35 4.69 2.48
MCU(+) 60
25 5.43 2.22 6.02 2.27 6.61 2.31 7.21 2.37 7.80 2.42 8.39 2.47
30 5.06 2.46 5.64 2.51 6.22 2.56 6.80 2.62 7.39 2.67 7.97 2.73
35 4.77 2.72 5.33 2.78 5.89 2.83 6.45 2.89 7.01 2.95 7.57 3.01
40 4.39 3.01 4.91 3.07 5.43 3.13 5.95 3.19 6.47 3.26 6.99 3.32
45 4.02 3.32 4.49 3.40 4.97 3.46 5.45 3.53 5.93 3.60
MCU(+) 80
25 6.07 2.26 6.64 2.31 7.21 2.37 7.79 2.42 8.36 2.47 8.93 2.53
30 5.68 2.49 6.23 2.54 6.77 2.60 7.32 2.66 7.87 2.71 8.42 2.77
35 5.28 2.72 5.81 2.78 6.33 2.83 6.86 2.89 7.38 2.95 7.91 3.01
40 4.90 3.03 5.39 3.10 5.88 3.16 6.37 3.23 6.86 3.29 7.35 3.36
45 4.52 3.35 4.97 3.42 5.43 3.49 5.88 3.56 6.33 3.63
MCU(+) 90
25 7.16 2.89 7.71 2.95 8.26 3.01 8.81 3.06 9.36 3.12 9.91 3.18
30 6.69 3.17 7.21 3.24 7.74 3.30 8.27 3.36 8.79 3.42 9.32 3.48
35 6.22 3.46 6.72 3.52 7.22 3.59 7.72 3.65 8.23 3.72 8.73 3.78
40 5.80 3.79 6.27 3.86 6.74 3.93 7.22 4.00 7.69 4.07 8.17 4.14
45 5.38 4.12 5.82 4.20 6.27 4.27 6.71 4.34 7.16 4.42 7.60 4.49
MCU(+) 100
25 7.87 3.18 9.10 3.42 10.40 3.66 11.52 3.87 12.61 3.87 13.83 3.86
30 7.60 3.23 8.73 3.88 9.68 3.81 10.71 4.05 11.66 4.18 12.71 4.29
35 7.00 3.24 8.06 3.56 9.03 3.87 9.92 4.13 10.91 4.31 11.89 4.52
40 6.17 3.16 7.12 3.54 8.14 3.86 8.91 4.17 9.86 4.47 10.80 4.75
45 5.12 2.95 6.18 3.47 7.07 3.89 7.98 4.25
MCU(+) 130
25 9.69 3.14 10.71 3.46 11.72 3.73 12.76 4.01 13.71 4.28 14.56 4.54
30 9.09 3.16 10.07 3.46 11.11 3.74 12.12 4.08 13.05 4.36 13.93 4.68
35 8.27 3.27 9.32 3.61 10.27 3.91 11.34 4.25 12.41 4.56 13.29 4.91
40 7.61 3.29 8.58 3.65 9.54 4.01 10.44 4.31 11.46 4.68
45 6.89 3.34 7.63 3.68 8.68 4.09
MCU(+) 150
25 11.06 3.73 12.26 4.13 13.26 4.46 14.30 4.82 15.24 5.15 16.19 5.47
30 10.42 3.75 11.52 4.14 12.56 4.48 13.57 4.88 14.56 5.24 15.48 5.63
35 9.46 3.89 10.59 4.32 11.61 4.68 12.69 5.08 13.77 5.47 14.77 5.90
40 8.70 3.90 9.79 4.35 10.76 4.78 11.67 5.15
45 7.90 3.98 8.89 4.40
MCU(+) 165
25 11.97 4.13 13.30 4.57 14.29 4.95 15.32 5.36 16.26 5.73 17.28 6.09
30 11.31 4.15 12.49 4.59 13.52 4.98 14.54 5.42 15.57 5.82 16.51 6.26
35 10.26 4.30 11.44 4.79 12.51 5.19 13.59 5.64 14.67 6.08 15.75 6.56
40 9.43 4.31 10.60 4.81 11.58 5.29 12.49 5.71
45 8.57 4.41
MCU(+) 180
25 13.42 4.71 14.97 5.12 16.28 5.45 17.63 5.79 18.86 6.13 20.27 6.47
30 12.74 4.75 14.13 5.16 15.39 5.51 16.76 5.90 18.08 6.26 19.34 6.64
35 11.52 4.94 12.94 5.38 14.34 5.76 15.67 6.16 17.12 6.56 18.51 6.98
40 10.63 4.96 11.97 5.44 13.28 5.89 14.43 6.26 15.95 6.74 17.31 7.18
45 9.72 5.10 10.95 5.61 12.17 6.09 13.31 6.49 14.63 6.98
MCU(+) 200
25 15.28 5.37 16.96 5.90 18.96 6.47 21.12 6.87 22.34 7.28 23.48 7.65
30 14.42 5.41 16.01 5.92 17.73 6.41 19.75 6.96 21.18 7.40 22.52 7.88
35 13.13 5.51 14.68 6.17 16.49 6.68 18.30 7.23 19.88 7.74 21.48 8.27
40 12.03 5.62 13.59 6.24 15.13 6.82 16.58 7.31 18.33 7.92
45 10.99 5.78 12.36 6.42 13.80 7.03
Note: Operation in the shaded areas of the tables will result in unacceptably high condensing temperatures and should be avoided.
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DCUE 15 - 80 CONDENSING UNIT CAPACITIES
MODEL
Air on to
Condenser
/C
Saturated Suction Temperature /C
-2.5 0 2.5 5 7.5 10
Cooling capacity and power input kW
Cap. Power Cap. Power Cap. Power Cap. Power Cap. Power Cap. Power
DCUE 15
25 1.88 0.97 2.12 1.03 2.35 1.08 2.61 1.13 2.87 1.16 3.21 1.19
30 1.71 1.00 1.94 1.07 2.17 1.11 2.43 1.17 2.74 1.21 2.98 1.25
35 1.67 1.05 1.88 1.12 2.02 1.17 2.33 1.23 2.55 1.27 2.68 1.32
40 1.47 1.07 1.74 1.16 1.87 1.21 2.17 1.26 2.37 1.32 2.57 1.35
45 1.45 1.10 1.63 1.19 1.83 1.27 2.01 1.32 2.29 1.35 2.38 1.41
DCUE 20
25 2.25 1.19 2.49 1.26 2.71 1.30 2.96 1.35 3.22 1.41 3.49 1.46
30 2.08 1.22 2.31 1.28 2.54 1.34 2.78 1.40 3.01 1.45 3.26 1.51
35 1.94 1.26 2.16 1.33 2.38 1.40 2.61 1.46 2.84 1.52 3.05 1.58
40 1.83 1.30 2.04 1.37 2.25 1.44 2.46 1.50 2.66 1.56 2.86 1.63
45 1.73 1.34 1.92 1.43 2.11 1.50 2.30 1.56 2.49 1.62 2.68 1.69
DCUE 30
25 2.87 1.44 3.22 1.52 3.53 1.59 3.74 1.65 4.12 1.72 4.49 1.75
30 2.71 1.48 3.06 1.57 3.27 1.63 3.51 1.70 3.84 1.77 4.19 1.82
35 2.59 1.55 2.82 1.62 3.03 1.70 3.36 1.77 3.68 1.85 3.79 1.92
40 2.38 1.59 2.71 1.67 2.80 1.75 3.12 1.82 3.32 1.90 3.62 1.97
45 2.11 1.65 2.43 1.73 2.53 1.83 2.84 1.91
DCUE 40
25 3.81 1.80 4.23 1.91 4.46 2.01 4.75 2.07 5.09 2.17 5.47 2.26
30 3.56 1.87 3.97 1.97 4.27 2.04 4.57 2.13 4.79 2.23 5.16 2.32
35 3.27 1.91 3.63 2.00 3.93 2.09 4.32 2.17 4.59 2.27 4.83 2.37
40 3.17 1.96 3.41 2.05 3.31 2.13 4.03 2.22 4.28 2.34
45 2.98 2.02 3.20 2.09
DCUE 50
25 4.57 1.87 5.09 2.03 5.51 2.14 5.97 2.25 6.41 2.38 6.79 2.51
30 4.34 1.95 4.75 2.09 5.25 2.19 5.63 2.32 6.04 2.45 6.49 2.58
35 3.94 2.00 4.42 2.13 4.91 2.24 5.29 2.36 5.75 2.49 6.09 5.65
40 3.76 2.05 4.22 2.18 4.58 2.29 5.04 2.41 5.39 2.58 5.69 2.74
45 3.50 2.12 3.93 2.22 4.37 2.35 4.69 2.48
DCUE 60
25 4.96 2.28 5.48 2.44 5.99 2.58 6.45 2.72 6.97 2.84 7.46 2.96
30 4.62 2.37 5.10 2.52 5.64 2.64 6.11 2.78 6.62 2.91 7.07 3.04
35 4.33 2.42 4.81 2.56 5.30 2.70 5.79 2.84 6.25 2.97 6.67 3.12
40 4.06 2.48 4.52 2.62 4.98 2.76 5.44 2.89 5.88 3.07
45 3.81 2.56 4.24 2.67
DCUE 80
25 5.90 2.68 6.44 2.88 6.84 3.05 7.31 3.18 7.73 3.33 8.21 3.47
30 5.49 2.78 6.01 2.97 6.51 3.10 6.99 3.26 7.38 3.41 7.82 3.56
35 5.09 2.85 5.60 3.02 6.09 3.17 6.57 3.32 6.93 3.47 7.35 3.64
40 4.76 2.92 5.32 3.08 5.68 3.23 6.15 3.38
45 4.54 3.00
Note: Operation in the shaded areas of the tables will result in unacceptably high condensing temperatures and should be avoided.
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-7-
INSTALLATION of 550 Series CONDENSING UNITS
These outdoor units are supplied fitted with an expansion device which contains a restrictor to control
refrigerant flow.
For use in systems which have their own refrigerant control at the indoor unit (eg. a capillary), remove
and discard the expansion device connected to the condensing unit prior to installation.
Note: It is easier to fit kits prior to mounting the unit.
These units are designed to stand on a flat surface. If the unit is to be wall mounted the
following kits are available.
(IMI Air Conditioning cannot accept liability for installers own mounting arrangements).
Model MCU(+) 15 - 80 MCU(+) 90 - 200
Mounting Bracket Kit 55021100 55021101
Whether floor or wall mounted, it is essential that the mounting surface is capable of
supporting the unit weight. Leave space around the unit for air circulation and access for installation and maintenance.
MOUNTING: MCU(+) 15 - 100
Dimensions in mm.
MODELABCDEFGHJK
Weight (kg)
1 Ph 3 Ph
MCU(+) 15 900 300 560 525 185 60 333 308 290 260 45 (39*) --
MCU(+) 20 900 300 560 525 185 60 333 308 290 260 46 (40*) --
MCU(+) 30 900 300 560 525 185 60 333 308 290 260 48 (41*) 48
MCU(+) 40 900 300 560 525 185 60 333 308 290 260 53 (45*) 53
MCU(+) 50 1000 300 660 570 213 60 333 308 290 260 64 62
MCU(+) 60 1000 300 660 570 213 60 333 308 290 260 65 63
MCU(+) 80 1000 300 660 570 213 60 333 308 290 260 66 64
MCU(+) 90 1000 350 760 495 250 70 383 358 340 310 76 73
MCU(+) 100 1000 350 760 495 250 70 383 358 340 310 -- 81
*Obsolete R407C and R22 models fitted with a rotary compressor
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-8-
MOUNTING: MCU(+) 130 - 200
Dimensions in mm.
MODEL A B C D E F G H J K Weight (kg)
MCU(+) 130 1000 425 1020 495 251 100 458 433 415 385 101
MCU(+) 150 1000 425 1020 495 251 100 458 433 415 385 103
MCU(+) 165 1000 425 1020 495 251 100 458 433 415 385 103
MCU(+) 180 1100 425 1215 675 211 95 458 433 415 385 118
MCU(+) 200 1100 425 1215 675 211 95 458 433 415 385 173
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-9-
INSTALLING 542 SERIES DUCTED CONDENSING UNITS
MOUNTING
Units are supplied with a polystyrene packing piece supporting the blower assembly, this MUST be removed prior to
commissioning.
Ducted Units are designed to be hung on a wall (kit available), suspended from a ceiling (installer supplied fittings), or to
stand on a flat surface. Whichever method is used it is essential that the mounting surface is capable of supporting the units
weight.
DIMENSIONS
Model A B C D E F G H J K Spigot dia. Weight (kg)
DCUE 10 (Obs) 930 510 495 1004 490 65 65 210 317 717 354 66
DCUE 15 930 510 495 1004 490 65 65 210 317 717 354 69
DCUE 20 930 510 495 1004 490 65 65 210 317 717 354 70
DCUE 30 930 510 495 1004 490 65 65 210 317 717 354 70
DCUE 40 930 510 495 1004 490 65 65 210 317 717 354 72
DCUE 50 1100 510 560 1174 490 65 65 240 392 865 404 81
DCUE 60 1100 510 560 1174 490 65 65 240 392 865 404 81
DCUE 80 1100 510 560 1174 490 65 65 240 392 865 404 84
FLOOR MOUNTING
Using the appropriate side of the packing carton as a
template, (centres marked A), mark out and drill 4 holes
to suit maximum M8 bolts (also see opposite). Secure the
unit to the floor. Discard the stabilizing brackets.
Dimensions in mm.
Model A B
10 to 40 930 510
50 to 80 1100 510
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-10-
SUSPENSION MOUNTING
The installer must supply 4 x M8 threaded rods with 16 nuts and washers to suit.
IMPORTANT: The stabilizing brackets provided MUST be used when suspending a unit.
Fit the stabilizing brackets to the top corners of the backpanel and front face using the No. 10 screws
provided, (2 per bracket).
If these brackets are omitted the unit will be subject to unacceptable movement on compressor start.
Where long drops of M8 rod are used, it is advisable to incorporate
flexible pipes in the suction and expansion lines to absorb any
movement of the unit.
Using the template printed on the side of the packing carton,
(centres marked A), mark out the ceiling and drill 4 holes to suit M8
screwed rod.
Raise the unit to the required height and pass the screwed rods
through the mounting holes in the units feet and stabilizing
brackets.
Secure the unit with a nut and washer on either side of each
stabilizing bracket and two nuts and washers underneath each foot
mounting hole, (as shown).
WALL MOUNTING
Wall mounting brackets are available as an optional kit (53200407).
DUCTWORK
Each unit is supplied with air inlet and discharge spigots:-
Models 10 to 40 - 354mm (14") dia.: Models 50 to 80 - 404mm (16") dia.
These may be used for connecting installers ducting or used with the optional duct, plenum and grille kits.
Refer to the kit instruction for installation methods.
The front face of the units are also fitted with M6 rivnuts to accept installer supplied square ducting, see dimensions below.
Maximum flange width is 25mm and fixing holes should be central within them.
NOTE: It is essential that ducting is adequately insulated to prevent sweating. An insulation thickness of at least 45mm
is recommended.
Dimensions
mm.
Model
10 to 40 50 to 80
A400 450
B300 350
C100 100
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