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10

IMPORTANT

The construction of a canopy or shade is necessary 

because of an ambient limit control set to 122°F (50°C)

to protect the electronics. If the outdoor unit is placed in 

direct sunlight it is possible that the limit may activate 

and shut down the unit. 

•  Place unit away from overhanging roof lines which 

would allow water or ice to drop on, or in front of, coil 

or into unit. Construct a canopy as illustrated in “Fig­

ure 18. Outdoor Unit on Pedestal and Protective Can

­

opy”.

Buried Refrigerant Pipe Protection

•  All refrigerant lines must be insulated regardless of if 

it is buried.

•  In addition to insulating each line of piping, buried 

lines must rest inside a 

sealed, watertight

 conduit.

•  The conduit must be designed so it cannot collect and 

retain water.

Securing the Outdoor Unit

Slab or Roof Mounting

Install the unit a minimum of 4 inches (102 mm) above 

the roof or ground surface to avoid debris build­up around 

the unit. Place the unit above a load bearing wall or area 

of the roof that can adequately support the unit. Consult 

local codes for rooftop applications.

CAUTION

Roof Damage!
This system contains both refrigerant and oil. Some 

rubber roofing material may absorb oil. This will cause 

the rubber to swell when it comes into contact with oil. 

The rubber will then bubble and could cause leaks. 

Protect the roof surface to avoid exposure to refrigerant 

and oil during service and installation. Failure to follow 

this notice could result in damage to roof surface.

Securing Outdoor Unit to Slab, Frame, or Rails

If the outdoor unit is installed on a field-provided slab or 

frame, use lag bolts or equivalent to secure the outdoor 

unit to the slab or frame.

Four Field-provided Anchor Bolts

Figure 20. Securing Outdoor Unit to Slab

Four Field-Provided 

Anchor Bolts

Figure 21. Securing Outdoor Unit to Rails

Securing Outdoor Unit to Hanging Brackets

If  the  outdoor  unit  is  installed  on  field-provided  wall 

mounting brackets, use lag bolts or equivalent to secure 

the outdoor unit to the bracket. Minimum rear clearance 

can be reduced to 6 inches (152 mm) when mounted 

on brackets and with no obstructions on the other three 

sides. Allow for moisture disposal when placing units 

above one another.

Air Outlet

Air Inlet

6 in

152 mm

Figure 22. Securing Outdoor Unit to Brackets

Refrigerant Piping Connections

Field piping consists of two copper lines connecting the 

outdoor unit to the indoor unit. “Table 3. Refrigerant Piping 

and Indoor Unit Connection Sizes” on page 11 lists 

the connection sizes. The connections are made using 

the provided brass flare nuts at the end of the refrigerant 

piping connections. 

1.  Choose the correct pipe sizes for your application 

using  “Table 3. Refrigerant Piping and Indoor Unit 

Connection Sizes” on page 11.

2. 

Confirm that you are using the correct diameter piping.

3.  Determine the necessary piping length required for 

the application.

4.  Cut the selected pipes with a pipe cutter. Make the 

cuts  flat  and  smooth  as  illustrated  in  “Figure  23. 

Cutting Piping”.

Summary of Contents for MCA Series

Page 1: ...ll unit assembly must be thoroughly cleaned following final construction clean up All mini split operating conditions must be verified ac cording to these installation instructions MCA Series Units SINGLE ZONE MINI SPLIT SYSTEM 115V and 208 230V 507879 01 6 2019 Supersedes 11 2018 Table of Contents General 1 Use of Mini Split System During Construction 1 Included Parts 2 Model Number Identificatio...

Page 2: ...nting of refrigerant CFCs HCFCs and HFCs as of July 1992 Approved methods of recovery recycling or reclaiming must be followed Fines and or incarceration may be levied for non compliance CAUTION As with any mechanical equipment contact with sharp sheet metal edges can result in personal injury Take care while handling this equipment and wear gloves and protective clothing IMPORTANT All illustratio...

Page 3: ... 1 ton 018 1 5 tons 024 2 tons Refrigerant Type 4 HFC 410A Minor Design Sequence 1 1st Revision M C A 009 S 4 S 1 P Series Type M Mini Split OUTDOOR SINGLE ZONE AIR CONDITIONER UNITS Cooling Efficiency S Standard Efficiency Major Design Sequence A First Generation Nominal Cooling Capacity 009 0 75 ton 012 1 ton 018 1 5 tons 024 2 tons Refrigerant Type 4 HFC 410A Refrigerant Circuits S Single Circu...

Page 4: ... Shown System Dimensions Outdoor Units 19 1 8 486 2 3 4 70 11 7 8 302 21 7 8 556 30 3 8 772 30 5 8 778 2 1 2 64 1 2 13 1 2 13 MCA009S4S MCA012S4S MCA081S4S BOTTOM VIEW FRONT VIEW SIDE VIEW SIDE VIEW 12 5 8 322 11 1 4 286 2 3 8 60 3 5 8 92 DRAIN HOLE bottom of unit 11 3 4 298 Figure 2 09 12K and 18K Outdoor Unit Dimen sions Inches mm MCA024S4S 27 5 8 702 BOTTOM VIEW FRONT VIEW SIDE VIEW SIDE VIEW 1...

Page 5: ...4 425 9 1 8 232 5 127 31 5 8 803 7 1 2 191 11 3 4 298 1 3 4 44 Figure 6 12K Indoor Unit Wall Plate Dimensions Inches mm MWCA018S4 Left Rear Hole 2 1 2 in 64 mm diameter Right Rear Hole 2 1 2 in 64 mm diameter 20 3 8 518 5 5 8 143 Wall Mount Unit Outline 2 1 4 57 38 965 12 1 2 318 2 1 4 57 5 3 8 137 6 3 4 171 2 3 8 60 Figure 7 18K Indoor Unit Wall Plate Dimensions Inches mm MWCA024S4 Left Rear Hole...

Page 6: ... is less than the height of the wall C the distance from the unit to the wall B must be a minimum of 12 inches 305 mm If the height of the wall C is greater than the height of the unit A the distance from the unit to the wall B must be a minimum of 20 inches 508 mm Figure 10 Multiple Outdoor Unit Clearances Inches mm Indoor Unit FRONT VIEW Wall Vertical Clearance Clearance to Floor 72 inches 1829 ...

Page 7: ...fficient space around unit for proper operation and maintenance Install unit a minimum of 3 feet 1m away from any antenna power cord line radio telephone security system or intercom Electrical interference and radio frequencies from any of these sources may affect op eration Be sure to instruct customers how to properly operate the unit especially maintenance of air filter and oper ation procedure...

Page 8: ...ided refrigerant piping connections and field provided flexible condensate piping are long enough to enable final field connections after unit is installed on wall mounting plate use field provided tape to bundle them together 3 The utility bundle may be routed out of the back of the unit or out either side If the bundle is to be routed out the back through an external wall feed the utility bundle...

Page 9: ...ht and vibration of the unit where the operation noise will not be amplified Choose a location where the hot air discharged from the unit or the operation noise will not be a nuisance to neighbors Avoid installing the outdoor unit near a bedroom or other places where noise may cause a problem There must be sufficient space to carry the unit into and out of the site There must be unobstructed air f...

Page 10: ...d installation Failure to follow this notice could result in damage to roof surface Securing Outdoor Unit to Slab Frame or Rails If the outdoor unit is installed on a field provided slab or frame use lag bolts or equivalent to secure the outdoor unit to the slab or frame Four Field provided Anchor Bolts Figure 20 Securing Outdoor Unit to Slab Four Field Provided Anchor Bolts Figure 21 Securing Out...

Page 11: ...e threaded connections with the flared refrigerant lines Tighten the flare nuts lightly at first to obtain a smooth match as illustrated in Figure 24 Making Connections Male to Female Connection Table 3 Refrigerant Piping and Indoor Unit Connection Sizes Size Btuh Liquid Line in Suction Line in 9K 1 4 3 8 12K 1 4 1 2 18K 1 4 1 2 24K 3 8 5 8 A B CANT ON THE OUTSIDE OF THE FLARE MALE FLARE CONNECTIO...

Page 12: ...l refrigerant Failure to do so may result in reduced performance Leak Test and Evacuation Air and moisture remaining in the refrigerant system will have undesirable effects as indicated below Pressure in the system rises Operating current rises Cooling or heating efficiency drops Moisture in the refrigerant circuit may freeze Water may lead to corrosion of parts in the refrigera tion system The li...

Page 13: ...es CAUTION All terminal connections must be made as illustrated in the following diagrams Improperly connected wiring could damage unit or cause communication errors between indoor and outdoor units Outdoor Unit Refer to unit nameplate for minimum circuit ampacity and maximum over current protection size Make all electrical power wiring connections at the outdoor unit Be sure to reattach all elect...

Page 14: ...Systems and Terminal Designations System Capacity System Voltage Number of Conductors Wire Type Wire Gauge MCA Indoor to Outdoor Wiring Communication Power 1 2 3 and GND 12K 115VAC 4 Stranded and unshielded 16AWG Outdoor to Main Power L N and GND 12K 115VAC 3 14AWG 15A Indoor to Outdoor Wiring Communication Power 1 2 3 and GND 09K 208 230VAC 4 16AWG 10A Indoor to Outdoor Wiring Communication Power...

Page 15: ...8 230VAC Outdoor Unit Wiring Diagram COMPRESSOR Y G DC FAN CN 7 3 BLUE BROW N BLACK 3 2 L N RED BLUE Y G 1 Y G AMBIENT TEMP SENSOR DIS CHAR GE T E MP S E NS OR CN 21 Y G Y G Y G CN4_1 CN4_2 CN4_3 CN4_4 REACTOR CAPACITOR BROWN BROWN BLACK BLACK BLACK W V RED BLUE U CN 1A CN 3 CN 1 CN 2 CN 16 CN 50 CN 30 CN 29 CN 28 OUTDOOR MAIN PCB T5 T3 T4 Figure 30 12K 115VAC Outdoor Unit Wiring Diagram ...

Page 16: ...1 2 ON 0 8 4 1 2 3 5 6 7 C 9 A B D E F 1 2 ON 0 8 4 1 2 3 5 6 7 C 9 A B D E F 1 2 ON ENC2 S1 0 F 0 F 0 F 0 F NETADDRESS CODE 0 15 16 31 32 47 48 63 FORSETTINGNETADDRESS CN10A DISPL AYBOAR D 8 Wired Controller OPTIONAL ADAPTER BOARD CN3 CN301 CN501 CN40 3 X Y E To LVM Comm Bus YELLOW BROWN RED 5 5 Programmable Wired Controller OPTIONAL 4 Note The programmable wired controller and LVM use the same p...

Page 17: ...ER CN5 INDOOR MOTOR INDOOR UNIT TO OUTDOOR UNIT CN_TIN Y G BLUE 5 WAY TERMINAL MAIN BOARD WIRING DIAGRAM 2 1 1 2 3 4 1 2 3 4 2 4 2 1 2 1 2 1 2 1 2 1 CN_L1 M 2 WHITE CN_N1 CN_S FAN CAPACITOR BOARD PC1_1 PC2_1 1 2 3 4 5 SWING MOTOR M 5 1 2 3 4 5 CN10 T1_room T2_pipe CN4 3 WHITE WHITE 3 1 2 1 2 3 0 8 4 1 2 3 5 6 7 C 9 A B D E F 1 2 ON 0 8 4 1 2 3 5 6 7 C 9 A B D E F 1 2 ON 0 8 4 1 2 3 5 6 7 C 9 A B D...

Page 18: ...rt circuit F4 Outdoor unit EEPROM parameter error F5 The outdoor fan speed is operating outside of the normal range p0 IPM malfunction or IGBT over strong current protection p1 Over voltage or over low voltage protection p2 High temperature protection of IPM module P3 Outdoor ambient temperature too low Table 8 Indoor Unit Error Codes Display Error Information p4 Inverter compressor drive error Te...

Page 19: ... is below 63 F 17 C In this instance you can use the MANUAL CONTROL button on the indoor unit to test the COOL function 1 Lift the front panel of the indoor unit and raise it until it clicks in place 2 The MANUAL CONTROL button is located on the right hand side of the unit Press it two times to select the COOL function See Figure 35 Manual Control Button 3 Perform Test Run as normal Terminal Block...

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