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Unico IS18G050, Installation Instructions Manual, Page: 19 / 48

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Unico IS18G050 Installation Instructions Manual Download Page 19

Bulletin 30-121.019 

19 

Copyright © 2015 Unico, Inc. 

(SAC 37.4255.109.02) 

 

 

 

 

 
 

 

Field wire, cable, shielded, 18 AWG(min.)

Disconnect or circuit breaker

Fuse or circuit breaker

Field wire, line voltage

Field wire, line voltage, ground

Field wire, low voltage

Field wire, low voltage, ground

1 INDOOR UNIT

IS12MPA
IS24MPB

1 INDOOR UNIT

U1218L-1EA2AX
M2430BL1-EA2 + M2430CL-A
M3036BL1-EA2 + M3036CL-A

POWER SUPPLY
AC 208-240V
1PHASE50/60 Hz

CAUTION

SDHVFAN-COIL UNITSMUSTHAVESEPARATE
POWERSUPPLYFROM OUTDOOR UNIT.

L2

POWER SUPPLY
AC 208-240V
1PHASE50/60 Hz

L1
GND

L2

POWER SUPPLY
AC 208-240V
1PHASE50/60 Hz

L1
GND

SYSTEM WIRING DIAGRAM

 

Be sure to ground 
one or both sides of 
the shielded 
communication 
cable. The shield 
ground wire is 
always uninsulated 
and is wrapped 
around the other 
wires. Sometimes 
the shield is 
braided.  

Summary of Contents for IS18G050

Page 1: ...r Indoor unit combination table Power Supply 208 230V 1 ph 60 Hz 1 2 3 4 the refrigerant circuit connections on the outdoor unit A B C D indoor unit size as shown in the following table Size Indoor Un...

Page 2: ...nection points and a possible fire hazard Do not allow wiring to touch the refrigerant tubing compressor or any moving parts of the fan Do not use multi core cable when wiring the power supply and con...

Page 3: ...g location to support the weight of the unit Select a location where tubing and drain hose have the shortest run to the outside Allow access for operation and maintenance as well as unrestricted air f...

Page 4: ...copper tube for refrigerant tubing connecting the units of the system it has to be insulated with insulation minimum thickness 5 16 inch 8 mm Minimum tubing thickness should be 0 031 inch 0 8 mm Tabl...

Page 5: ...15 m 40 ft 12 m 100 ft 30 m 80 ft 25 m IS24G065 SINGLE SPLIT 65 ft 20 m 115 ft 35 m DUAL SPLIT 100 ft 30 m 80 ft 25 m 150 ft 45 m 100 ft 30 m TRI SPLIT 100 ft 30 m 65 ft 20 m 150 ft 45 m 80 ft 25 m I...

Page 6: ...4255 109 02 Single Split 1 Indoor Unit For single split applications always connect the indoor unit to Circuit 1 of the outdoor unit IS18G050 IS24G065 IS30G080 2 1 EMIX PORT SEE EMIX UNIT OR EMIX TAN...

Page 7: ...Copyright 2015 Unico Inc SAC 37 4255 109 02 Single Split 1 Indoor Unit Continued IS36G110 1 2 3 4 1 2 3 4 ADAPTER SPLITTER 1 2F X 3 8F X 5 8M INCL WITH INDOOR UNIT ADAPTER REDUCER FLARE 1 4F X 3 8M I...

Page 8: ...Bulletin 30 121 019 8 Copyright 2015 Unico Inc SAC 37 4255 109 02 Dual Split 2 Indoor Units IS18G050 IS24G065 2 1 2 1 1 2 3 1 2 3...

Page 9: ...Bulletin 30 121 019 9 Copyright 2015 Unico Inc SAC 37 4255 109 02 Dual Split 2 Indoor Units Continued IS24G065 IS30G080 and IS36G110 1 2 3 1 2 3 4 1 2 3 4 1 2 3 4...

Page 10: ...Bulletin 30 121 019 10 Copyright 2015 Unico Inc SAC 37 4255 109 02 Dual Split 2 Indoor Units Continued IS30G080 IS36G110 IS36G110 1 2 3 4 1 2 3 4...

Page 11: ...Bulletin 30 121 019 11 Copyright 2015 Unico Inc SAC 37 4255 109 02 Tri Split 3 Indoor Units IS24G065 IS30G080 IS36G110 1 2 3 1 2 3 1 2 3 4 1 2 3 4...

Page 12: ...Bulletin 30 121 019 12 Copyright 2015 Unico Inc SAC 37 4255 109 02 Tri Split 3 Indoor Units Continued IS30G080 IS36G110 IS36G110 1 2 3 4 1 2 3 4...

Page 13: ...Bulletin 30 121 019 13 Copyright 2015 Unico Inc SAC 37 4255 109 02 Quad Split 4 Indoor Units IS30G080 IS36G110 1 2 3 4 1 2 3 4...

Page 14: ...end Use 3 4 inch 18 mm plastic tubing Plug the other hole with the plastic cap Remove the side cover to connect the refrigerant lines and wiring Connect the refrigerant lines first Then connect the p...

Page 15: ...ng Tighten connections using a wrench and a torque wrench Yellow Jacket 60650 or equal apply specified torque see table TUBE DIA TIGHTENING TORQUE Approx 1 4 6 35 mm 10 15 lb ft 150 200 kg cm or 14 20...

Page 16: ...ir and moisture have undesirable effects on the refrigerant system Evacuate the line set and indoor to 500 microns The time required will vary with vacuum pump capacity The time shown below is only fo...

Page 17: ...fter 10 seconds Check tightness of all joints using liquid soap Turn the service valves stem in counterclockwise to fully open the valves At this point vacuum pump flexible hose can be disconnected Re...

Page 18: ...and support tubes with brackets Seal hole in the wall if necessary valve 3 way Action Narrow tube service valve 2 way As shipped from factory Valve is front seated closed Normal operation Valves are b...

Page 19: ...INDOOR UNIT U1218L 1EA2AX M2430BL1 EA2 M2430CL A M3036BL1 EA2 M3036CL A POWERSU PPL Y AC208 240V 1PHASE50 60 Hz CAUTION SDHVFAN C OIL U NITSMUSTHAVESEPARATE POWERSUPPL YFROM OUTDOORUNIT L2 POWERSU PP...

Page 20: ...VESEPARATE POWERSU PPL YFROM OUTDOORUNIT 2 INDOOR UNITS POWERSUPPLY AC208 240V 1PHASE50 60 Hz Field wire cable shielded 18 AWG min Disconnect or circuit breaker Fuseor circuit breaker Field wire line...

Page 21: ...STHAVESEPARATE POWERSUPPLYFROM OUTDOORUNIT POWERSUPPLY AC208 240V 1PHASE50 60 Hz 3 INDOOR UNITS L2 Field wire cable shielded 18 AWG min Disconnect or circuit breaker Fuseor circuit breaker Field wire...

Page 22: ...6CL A CAUTION SDHVFAN COILUNITS MUSTHAVESEP ARA TE POWERSUPPL YFR OM OUTDOORU NIT POWERSUPPLY AC208 240V 1PHASE50 60 Hz 4 INDOOR UNITS POWER SUPPLY AC 208 240V 1PHASE 50 60 Hz Field wire cable shielde...

Page 23: ...into the outdoor unit without losing gas Pump down is used when the unit is to be moved or before servicing the refrigerant circuit Connect a valve manifold to the charge port on a wide tube service v...

Page 24: ...t 4 Insert the batteries in the remote control unit 5 Set the channel of the indoor unit to match the remote control channel see table CHANNEL REMOTE CONTROLLER SETTINGS INDOOR UNIT SETTINGS WALL MOUN...

Page 25: ...oint the system will operate with the new address OUTDOOR UNIT CIRCUIT PORT INDOOR UNIT WALL MOUNT UNIT CONTROL BOARD SDHV FAN COIL UNIT INDOORB CONTROL BOARD 1 FACTORY DEFAULT SW1 1 OFF 2 OFF SW2 1 O...

Page 26: ...ches and the remote setting must be set to Circuit 1 which is the factory default ALWAYS POWER OFF THE UNIT BEFORE CHANGING THE DIP SWITCHES After the wiring and piping is complete verify that the sys...

Page 27: ...isplayed on the remote can be either positive or negative but the sign is not shown To discern whether you are on the positive or negative side of the number line press the button once in the Special...

Page 28: ...ress the GREEN button to turn ON the remote 3 Next press and hold the Filter Shift button for 7 seconds to enter the Special Functions mode You will see the word Filter appear on the remote control di...

Page 29: ...l display The remote display is temperature in Fahrenheit units 7 Press the or button until the number displayed is the setpoint value you want 8 Point the remote towards the MMI board Press and hold...

Page 30: ...AT S3 STAGE 3 AUXILIARY HEAT AUX FUTURE USE PLUGS P6 THERMOSTAT OUTPUT TO INDOORB P7 AUXILIARY INPUT FROM INDOORB P4 POWER 24VAC TERMINAL BLOCK THERMOSTAT CONNECTIONS R POWER 24V B REV VALVE ENERGIZE...

Page 31: ...on which thermostat is being used If using iSERIES Wireless Remote Thermostat If using Standard Heat Pump Thermostat 1 Be sure there is no jumper on the terminals labeled STD T STAT 2 Connect the Infr...

Page 32: ...e Damper Systems only when using standard heat pump thermostat Setup the system as if using standard 24V thermostats with a zone damper system The zone damper controller appears to the iSeries control...

Page 33: ...Bulletin 30 121 019 33 Copyright 2015 Unico Inc SAC 37 4255 109 02 Model IS18G050 OUTDOOR UNIT WIRING SCHEMATICS...

Page 34: ...Bulletin 30 121 019 34 Copyright 2015 Unico Inc SAC 37 4255 109 02 Model ISG65...

Page 35: ...Bulletin 30 121 019 35 Copyright 2015 Unico Inc SAC 37 4255 109 02 Model IS30G080...

Page 36: ...RV Reversing Valve 4 way EEV 1 2 3 4 Electronic Expansion Valve indoor unit RY Relay EEV BP Electronic Expansion Valve outdoor coil SR Starting relay EMI Filter Electromagnetic Interference filter SSR...

Page 37: ...er board The outdoor unit includes two circuit boards the main board and the electronic expansion valve driver board The EEV driver board controls the expansion valves EEV driver board for the IS18G05...

Page 38: ...K A01928 G01 For use with standard thermostat not included REMOTE IR RECEIVER REMOTE CONTROL A01926 001 REMOTE IR RECEIVER KIT A01861 K01 1 2 3 4 5 6 7 8 Cable 30 FT 10m A01927 001 For use with iSERIE...

Page 39: ...d output J14 Return air temperature RAT sensor mounted in coil section J15 Indoor coil temperature ICT sensor mounted on coil J16 Communication cable to motor connected to VLB motor adapter board J17...

Page 40: ...e damper systems Also allows the control box to receive signals from the remote control when using a standard thermostat P6 P7 P4 Thermostat Adapter Relay Board A01837 G01 LEGEND LED LIGHTS INPUTS FRO...

Page 41: ...e an overflow of condensate will cause damage install a float or wet switch to stop the operation of the unit Condensate Pump The system allows for a condensate pump if in cooling mode or if the float...

Page 42: ...llation of an external switch to shut down the system For example a hotel application might link the operation of the system to a key lock so that the unit turns off when the room is not occupied Inst...

Page 43: ...ico Inc SAC 37 4255 109 02 IS18G050 IS24G065 14 17 360 11 22 285 13 27 337 0 59 15 21 18 538 35 24 895 32 68 830 All dimensions in inches mm 15 75 400 13 39 340 25 98 660 37 09 942 40 55 1030 15 75 40...

Page 44: ...44 Copyright 2015 Unico Inc SAC 37 4255 109 02 IS30G080 IS36G110 13 39 340 31 89 810 46 85 1190 15 75 400 5 51 140 All dimensions in inches mm 13 39 340 31 89 810 46 85 1190 5 51 140 15 75 400 All dim...

Page 45: ...Bulletin 30 121 019 45 Copyright 2015 Unico Inc SAC 37 4255 109 02 IS18G050 IS24G065 REFRIGERANT CIRCUITING...

Page 46: ...Bulletin 30 121 019 46 Copyright 2015 Unico Inc SAC 37 4255 109 02 IS30G080 IS36G110...

Page 47: ...apor lines to the indoor unit In heating it is the same as the compressor discharge In cooling it is the suction pressure LED lights Both the indoor and outdoor unit display error codes when the unit...

Page 48: ...TT B probe sensor fault 14 NTT B probe sensor fault 15 WTT C probe sensor fault 16 NTT C probe sensor fault 17 WTT D probe sensor fault 18 NTT D probe sensor fault 19 CTS Compressor Top Shell probe se...

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