Carrier 45MUAA Installation Instructions Manual

Crossover air handler

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45MUAA

Crossover Air Handler

Sizes 18K - 60K

Fig. 1 — Sizes 18K - 60K

NOTES: Read the entire instruction manual before starting the

installation. Images are for illustration purposes only.

Actual models may differ slightly.

Installation Instructions

Specifications subject to change without notice.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS........................................................2

PRODUCT INSTALLATION WARNINGS ...................................9

ACCESSORIES................................................................................12

MODEL NUMBERS........................................................................12

DIMENSIONS..................................................................................13

ELECTRICAL DATA......................................................................14

INSTALLATION .............................................................................15

Step 1 - Check Equipment ................................................................15

Step 2 - Mount Unit ..........................................................................15

Step 3 - Mount Positions...................................................................15

Step 4 - Select Installation Location.................................................16

Step 5 - Preparation and Precaution for Installation.........................17

WIRING PRECAUTIONS...............................................................19

INDOOR UNIT WIRING ................................................................20

INSTALLATION GUIDE FOR AHU 115V POWER SUPPLY.....21

Dip Switch Definitions .....................................................................30

Step 6 - Down Flow and Horizontal Right Installations...................38

Down Flow and Horizontal Right Steps...........................................38

Step 7 - Refrigerant Piping ...............................................................43

REFRIGERANT PIPING CONNECTION......................................45

NOTE ON ADDING REFRIGERANT............................................46

TEST RUN .......................................................................................46

AIR-HANDLER REFRIGERANT PIPING CONNECTION..........48

WIRING DIAGRAM .......................................................................52

WIRELESS REMOTE CONTROLLER INSTALLATION............54

OPTIONAL WIRED WALL-MOUNTED REMOTE CONTROL IN-

STALLATION .................................................................................55

SETTING UP AIRFLOW AND STATIC PRESSURE...................55

FAN PERFORMANCE....................................................................56

TROUBLESHOOTING ...................................................................66

PAGE

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Summary of Contents for Carrier 45MUAA

Page 1 45MUAA Crossover Air Handler Sizes 18K - 60K Installation Instructions TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS............2 PRODUCT INSTALLATION WARNINGS ........9 ACCESSORIES................12 MODEL NUMBERS................12 DIMENSIONS..................13 ELECTRICAL DATA..............14 INSTALLATION ................15 Step 1 - Check Equipment ..............15 Step 2 - Mount Unit ................15 Step 3 - Mount Positions..............15...
Page 2 45MUAA: Installation Instructions SAFETY CONSIDERATIONS CAUTION Installing, starting up, and servicing air- conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.). EQUIPMENT DAMAGE HAZARD Only trained, qualified installers and service mechanics should install, Failure to follow this caution may result in equipment damage or start- up, and service this equipment.
Page 3 45MUAA: Installation Instructions WARNING WARNING Turn off the air conditioner and disconnect the power before PERSONAL INJURY AND PROPERTY DAMAGE HAZARD performing any installation or repairing. Failure to do so can cause electric shock. For continued performance, reliability, and safety, the only approved accessories and replacement parts are those specified by Installation must be performed by an authorized dealer or specialist.
Page 4 45MUAA: Installation Instructions For Class B Digital Device This device complies with part 15 of the FCC Rules. Operation is subject NOTE: This equipment has been tested and found to comply with the to the following two conditions: (1) This device may not cause harmful limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
Page 5 45MUAA: Installation Instructions Table 2 — A (min) HO, RELEASE HEIGHT FT (M) Mc or Mrel (lbs (kgs) ≤ 7.2 (2.2) 7.5 (2.3) 7.9 (2.4) 8.5 (2.6) 9.2 (2.8) 9.8 (3.0) ≤ 3.91 (1.776) 12 (1.10) 4.0 (1.8) 60 (5.53) 57 (5.29)
Page 6 45MUAA: Installation Instructions 1. Installation (where refrigerant pipes are allowed) the minimum floor area of the room shall be mentioned in the form Any person who is involved with working on or breaking into a of a table or a single figure without reference to a formula; after...
Page 7 45MUAA: Installation Instructions 8. Presence of fire extinguisher 14. Detection of flammable refrigerants If any hot work is to be conducted on the refrigeration equipment or Under no circumstances shall potential sources of ignition be used in the any associated parts, appropriate fire extinguishing equipment shall searching for or detection of refrigerant leaks.
Page 8 45MUAA: Installation Instructions Cylinders shall be kept upright. The recovery equipment shall be in good working order with a set of Ensure that the refrigeration system is earthed prior to charging the instructions concerning the equipment that is at hand and shall be suitable for system with refrigerant.
Page 9 45MUAA: Installation Instructions PRODUCT INSTALLATION WARNINGS For appliances using FLAMMABLE REFRIGERANTS with safety features that depend upon the proper function of a leak detection system used for leak mitigation, the instructions and unit markings shall contain • Turn off the air conditioner and disconnect the power before the substance of the following: LEAK DETECTION SYSTEM installed.
Page 10 45MUAA: Installation Instructions FLAMMABLE REFRIGERANT USE WARNINGS The allowed static pressure range of the air conditioner on site is 0-0.80 in.wc.(0-200 Pa). The data below represents the static pressures at full required air flow used for AHRI testing. 1. Installation (Space) - That the installation of pipe-work shall be kept to a minimum.
Page 11 45MUAA: Installation Instructions • The space shall have appropriate openings according to Sec.2. • The minimum opening area for natural ventilation Anvmin shall not be less than listed in Table 5. Table 5 — Opening Area HEIGHT OF MC, LB...
Page 12 45MUAA: Installation Instructions ACCESSORIES The system is shipped with the following accessories. Use all of the installation parts and accessories to install the system. Improper installation may result in water leakage, electrical shock and fire, or cause the equipment to fail. Keep the installation manual in a safe place and do not discard any other accessories until the installation has been completed.
Page 13 45MUAA: Installation Instructions DIMENSIONS Table 11 — Dimensions MODEL (BTU/H) 18K/24K 30K/36K 48K/60K DIMENSIONS inch 1143 1245 1346 inch inch 17-1/2 21-1/50 24-1/2 inch 15-3/4 19-5/16 22-27/32 inch 10-1/4 10-1/4 10-1/4 Fig. 3 — Dimensions Unit: Inch/mm) Recommended filter size...
Page 14 45MUAA: Installation Instructions ELECTRICAL DATA Table 13 — Electrical Data INDOOR UNIT V-Ph-Hz 115V/208/230-1-60 Minimum Circuit Ampacity (MCA) 115V 14.5 14.5 Minimum Circuit Ampacity (MCA) 208/230V Maximum Overcurrent Protection Ampacity (MOP) Voltage - Phase - Frequency 115V/208/230-1-60 Max – Min Voltage Range...
Page 15 45MUAA: Installation Instructions INSTALLATION WARNING Prior to Installation Before installing the indoor unit, ensure the compatibility with the outdoor unit using the product data as a reference. It is also necessary to confirm the proper application of the equipment and to perform a heat load calculation for proper sizing.
Page 16 45MUAA: Installation Instructions Step 4 - Select Installation Location CAUTION Install the indoor and outdoor units, cables and wires at least 3-1/5ft (1m) from televisions or radios to prevent static or image distortion. Depending on the appliances, a 3-1/5ft (1m) distance may not be sufficient.
Page 17 45MUAA: Installation Instructions Step 5 - Preparation and Precaution for Recommended Distances Between the Indoor Unit Installation The distance between the mounted indoor unit should meet the specifications illustrated in Figure 10. WARNING Horizontal Installation There must be an airtight seal between the bottom of the air handler and the return air plenum.
Page 18 45MUAA: Installation Instructions Indoor Unit Parts Installation Site NOTE FOR DUCT CONNECTIONS: The duct should be The duct should be insulated The duct should be a The duct should be assembled according to using a Vapor Barrier. Flexible suspension fabricated/installed in the instructions.
Page 19 45MUAA: Installation Instructions WIRING PRECAUTIONS • Only connect the unit to an individual branch circuit. Do not connect another appliance to that Circuit. • Make sure to properly ground the air conditioner. WARNING • Every wire must be firmly connected. Loose wiring can cause the terminal to overheat, resulting in product malfunction and possible fire.
Page 20 45MUAA: Installation Instructions INDOOR UNIT WIRING WARNING CAUTION Isolate the power supply leads and communication leads by the strain relief and keep the power supply leads away from the While connecting the wires, please strictly follow the wiring communication leads.
Page 21 45MUAA: Installation Instructions INSTALLATION GUIDE FOR AHU 115V POWER SUPPLY CN11 (Power wire) CN15 (Fan Motor) NOTE: Electric Heat cannot be used with 115 volt applications. All CN34 (Fan Motor) control wiring methods referring to electric heat as well as airflow settings for electric heat in this manual should not be considered for 115 volt applications.
Page 22 45MUAA: Installation Instructions Fig. 20 — Step 4 4. A connection wire is used to connect the 24V transformer to the main control board. The default connection wire used for 230V power has a red connector connecting to the 24V transformer.
Page 23 45MUAA: Installation Instructions CN12 CN11 Remove the two screws Fig. 22 — Step 6 6. Reinstall the electronic control box with the entire unit, fix it with screws, and insert the wire body properly. Plug temperature sensors T1, T2, T2A, T2B refrigerant detection sensor and electronic expansion valve (EEV), and fan motor power pair plug (CN11) from the control board.
Page 24 45MUAA: Installation Instructions Specific Wiring Methods SCENARIO 3: This allows a 24 volt thermostat to be used with 24 volt communication between the indoor and outdoor units. Some communication features will WARNING not be available with this method. NOTE: This equipment energizes the reversing valve in heat. Ensure that the B terminal is configured at the thermostat for heat.
Page 25 45MUAA: Installation Instructions Y/Y2 COM OY2 OB/O S4-2 Default on, DH function off. S4-4 Default on, W1 and W2 Turn switch off to activate DH shorted for single stage Aux heat function. operation. Turn off to separate stages Y/Y2 COM OY2 OB/O S4-2 Default on, DH function off.
Page 26 45MUAA: Installation Instructions Optional Function Wiring Condensate Overflow Switch The unit will accommodate a remote condensate overflow switch. To enable, remove jumper J7, and connect the installer provided condensate overflow device to CN23 per image below. When an overflow condition is present, the device should open connection signaling the unit to turn off the system.
Page 27 45MUAA: Installation Instructions Alarm Output Indoor and Outdoor Unit Communication Alarm Output: An alarm output (CN33) can be utilized if actions are required when a fault is present. This is a dry contact connection, so you will need to input a voltage signal.
Page 28 45MUAA: Installation Instructions Humidifier Control Control Logic Table 15 — Indoor Unit Connector CONNECTOR PURPOSE 24V Power Connector Common Fan Control Low Demand Y/Y2 High Demand Heating Reverse Valve Conventional Heat Control Fig. 27 —Humidistat Stage 1 Electric Housing Stage 2 Electric Housing To connect a humidifier, utilize the dry contact “WORK”...
Page 29 45MUAA: Installation Instructions Black Button Instructions (For Scenario 2 Only) • Press the Black button to enter the forced automatic mode, press the Black button again to enter the forced cooling mode (LED display FC), and press the Black button again to shut down.
Page 30 45MUAA: Installation Instructions Dip Switch Definitions Function Rotary switch Function DIP switch Electric Heater Airflow DIP switch Black Button Function DIP switch display Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Page 31 45MUAA: Installation Instructions Function DIP switch settings: Function combination table of SW1-1 and SW1-4: The 24V thermostat mode needs to refer Control type Stand alone or full system to the following settings: Free match Free match 000 is the default 000/001/010/ 011/100/101/110/111.
Page 32 45MUAA: Installation Instructions Indoor Unit Dial Code Table 17 — Indoor Unit Dial Code DIAL CONTROL FUNCTION NOTE CODE SCENARIO SW1-2 1,2,3 Anti-cold blow protection option [Default] YES Single cooling / heating and SW1-3 1,2,3 Cooling [Default] Cooling & Heating...
Page 33 45MUAA: Installation Instructions DIAL CONTROL FUNCTION NOTE CODE SCENARIO Compressor Running (demand [Default] Faster Only affects SW3-3 working with heat pump+ Electric Compressor slower speed Compressor compressor and W2 heat) Temperature differential to activate second stage auxiliary heating (the GAP of T1 and ...
Page 34 45MUAA: Installation Instructions Table 20 — Determined by dial code SW8 1-10K 2-5.1K Dial Code Selection NET Address S1 + 48 Fig. 29 — Dip Switch S1 + 32 Address DIP Switch: S1 + 16 Address dialing S1+SW8: When the user uses the centralized controller, the address dialing is required.
Page 35 45MUAA: Installation Instructions Table 22 — Air Volume WIRED 24V THERMOSTAT EXTERNAL CONTROLLER ELECTRIC STATIC AIRFLOW CAPACITY FAN SPEED AUXILIARY HEAT PRESSURE VOLUME (CFM) MODULE DIP SWITCH TERMINAL MODE RANGE SWITCH ENGAGED Cooling Turbo — SW3-4=ON Y2/Y — Cool Cooling High —...
Page 36 45MUAA: Installation Instructions WIRED EXTERNAL 24V THERMOSTAT ELECTRIC CONTROLLER STATIC AIRFLOW CAPACITY FAN SPEED AUXILIARY HEAT PRESSURE VOLUME (CFM) MODULE DIP SWITCH TERMINAL MODE RANGE SWITCH ENGAGED Cooling Turbo — SW3-4=ON Y2/Y — Cool Cooling High — SW3-4=OFF Y2/Y —...
Page 37 45MUAA: Installation Instructions Table 23 — Air Volume ELECTRIC AIRFLOW VOLUME FAN SPEED AUXILIARY HEAT 24V THERMOSTAT WIRED CONTROLLER EXTERNAL (CFM) MODULE STATIC CAPACITY PRESSURE RANGE DIP SWITCH TERMINAL DIP SWITCH MODE ENGAGED Cooling Turbo — SW3-4=ON Y2/Y — Cool...
Page 38 45MUAA: Installation Instructions Step 6 - Down Flow and Horizontal Right Installations Follow these steps to perform installation and vertical down installation. horizontal right 1. Open the upper cover. 2. Open the cover of the electronic control box. 3. Connect the wire according to the wiring diagram.
Page 39 45MUAA: Installation Instructions Step 4 Step 5 Indication of the position of each Unplug temperature sensors T1, T2, T2A, T2B, temperature sensor of the evaporator: refrigerant detection sensor and electronic expansion valve (EEV) from the control board. T1: IDU room temp. sensor(T1) T2: IDU coil temp.
Page 40 45MUAA: Installation Instructions Step 7 Remove the evaporator and drain pan and rotate 180° Step 10 (when your equipment need to be vertical downed Reinstall T1, T2, T2A, T2B configuration). sensor plugs and electronic expansion valve (EEV) and tie up the sensor wires.
Page 41 45MUAA: Installation Instructions Step 13 Step 11 Reinstall the evaporator cover plate. The evaporator is assembled in place. Step 12 Use cable ties to attach the room temperature sensor. Step 14 cable Connect the wire according to the wiring diagram.
Page 42 45MUAA: Installation Instructions Vertical Installations CAUTION These units operate with a negative pressure at the drain connections and a drain trap is required. The trap needs to be installed as close to the unit as possible. Make sure the top of the trap is below the connection to FOR ALL PIPES INSTALLATION the drain pan to allow complete drainage of the pan.
Page 43 45MUAA: Installation Instructions Step 7 - Refrigerant Piping Table 24 — Refrigerant Piping ADAPTER AIR HANDLER UNIT REQUIRED AT ADAPTER REQUIRED AT OUTDOOR OUTDOOR UNIT HANDLER CONNECTION AIR HANDLER OUTDOOR UNIT (IN.FLARE TO MODEL CONNECTION (IN.FLARE) UNIT MODEL (IN.FLARE) UNIT(IN.FLARE TO...
Page 44 45MUAA: Installation Instructions NOTE: Use both a backup wrench and a torque wrench when connecting or disconnecting pipes to or from the unit. Flare nut Copper pipe Fig. 35 — Copper pipe and flare nut d. Remove the PVC tape from ends of pipe when ready to perform the flaring work.
Page 45 45MUAA: Installation Instructions Use appropriate tool >2in(50mm) >2in(50mm) >2in(50mm) min-radius 3.9in(100mm) Fig. 39 — Minimum Bend Radius Fig. 41 — Drain Trap After connecting the copper pipes to the indoor unit, wrap the NOTE: Horizontal runs must also have an anti-siphon air vent...
Page 46 45MUAA: Installation Instructions Pipe Length and Elevation TEST RUN CAUTION Table 27 — Maximum Length and Drop Height Based on Models (Unit: ft./m) CAPACITY Failure to perform the test run may result in unit damage, property MAXIMUM PIPING LENGTH MAXIMUM DROP HEIGHT (BTU/H) damage, or personal injury.
Page 47 45MUAA: Installation Instructions 24V Signal Chart Table 30 — 24V Signal Chart 24V INPUT TERMINAL Priority Y/Y2 Fan speed Display Mode Cooling stage 1 High Cooling stage 2 Dehumidification 1 Dehumidification 2 Heat pump stage 1 High Heat pump stage 2...
Page 48 45MUAA: Installation Instructions AIR-HANDLER REFRIGERANT PIPING CONNECTION Flare Connection Insulation sleeve After the unit is installed, wrap the piping and brass fitting with foam tape. Fig. 42 — Correct Refrigerant piping Connecting Installation Methods Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Page 49 45MUAA: Installation Instructions Installation of Electric Auxiliary Heat Module (Only For Heat Function Models) NOTE: 115 Volt applications cannot use electric heat. NOTE: Installation must be performed by an licensed contractor. Make necessary precaution when performing the installation operation. Table 31 — Accessories...
Page 50 45MUAA: Installation Instructions Installation Preparation Before installation, please confirm the electric auxiliary heat module and Step 3 supplied accessories are complete and free of any damage. Do not Remove the terminal block and power wires, attempt to install if damage is present.
Page 51 45MUAA: Installation Instructions Indoor Unit Confirmation Step 5 NOTE: Electric auxiliary heating wiring diagram packed with the accessories. If the branch circuit wire length exceeds 100 ft, Tighten the mounting screws. consult NEC 210-19a to determine maximum wire length. Use 2% voltage drop.
Page 52 45MUAA: Installation Instructions WIRING DIAGRAM WIRING DIAGRAM NOTE1: 1.This symbol indicates the element is optional,the actual shape shall prevail. CODE PART NAME 2.Remove the short connector of JR1 when using the "ON-OFF" function. FAN1 INDOOR ECM 3.Remove the short connector of J7 when using the "WATER LEVEL SWITCH" function.
Page 53 45MUAA: Installation Instructions WIRING DIAGRAM NOTE1: 1.This symbol indicates the element is optional,the actual shape shall prevail. CODE PART NAME 2.Remove the short connector of JR1 when using the "ON-OFF" function. FAN1 INDOOR ECM 3.Remove the short connector of J7 when using the "WATER LEVEL SWITCH" function.
Page 54 45MUAA: Installation Instructions INSTALL ALL POWER, INTERCONNECTING WIRELESS REMOTE CONTROLLER WIRING, AND PIPING TO THE INDOOR UNIT INSTALLATION 1. Run interconnecting piping and wiring from the outdoor unit to the indoor unit. 2. Run an interconnecting cable through the hole in wall (outside to inside).
Page 55 45MUAA: Installation Instructions OPTIONAL WIRED WALL-MOUNTED Simultaneously press ON/OFF and FAN SPEED for 8 seconds: The remote is now in the INQUIRY mode. REMOTE CONTROL INSTALLATION The remote control remains in the INQUIRY mode for 1 The wired remote controller comes with the following items: minute if no other button is pressed.
Page 56 45MUAA: Installation Instructions FAN PERFORMANCE Vertical, Horizontal Right, Horizontal Left Setting of air volume through service mode: • See “Remote Controller Service Mode Set Up on page 55. to access the SERVICE mode through the INQUIRY mode. • Use the UP and DOWN arrow buttons on the remote, scroll to CODE 23-Maximum Cooling Fan Speed for Cooling fan speed changes and CODE 25-Maximum Heating Fan Speed for Heating Fan Speed changes.
Page 57 45MUAA: Installation Instructions COOLING Default TURBO HIGH MIDDLE COOLING Default -19~-40 TURBO HIGH MIDDLE COOLING Default +9~+20 TURBO HIGH MIDDLE HEATING Default TURBO HIGH MIDDLE HEATING Default -17~-40 TURBO HIGH MIDDLE HEATING Default +14~+20 TURBO HIGH MIDDLE Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Page 58 45MUAA: Installation Instructions 1000 0.1 0.148 0.2 External sta c pressure (in.w.c.) COOLING Default TURBO HIGH MIDDLE COOLING Default TURBO HIGH MIDDLE COOLING Default TURBO 1008 1028 1048 1068 1071 1071 HIGH 1014 MIDDLE COOLING Default +17~+20 TURBO 1071 1071...
Page 59 45MUAA: Installation Instructions 30K (CONT) HEATING Default TURBO HIGH MIDDLE HEATING Default TURBO HIGH MIDDLE HEATING Default -24~-40 TURBO 1018 1038 HIGH MIDDLE HEATING Default +14~+20 TURBO 1058 1071 1071 1071 1071 1071 1071 1071 HIGH 1016 1036 1053 1053...
Page 60 45MUAA: Installation Instructions 1200 1000 0.148 External sta c pressure (in.w.c.) COOLING Default TURBO 1188 1168 1148 1128 1108 1088 1068 1048 1028 1008 HIGH 1082 1062 1042 1022 1002 MIDDLE COOLING Default TURBO 1188 HIGH 1082 MIDDLE COOLING Default...
Page 61 45MUAA: Installation Instructions 36K CONT HEATING Default TURBO 1112 1092 1072 1052 1032 1012 HIGH 1059 1039 1019 MIDDLE HEATING Default TURBO 1112 HIGH 1059 MIDDLE HEATING Default -33~-40 TURBO 1112 HIGH 1059 MIDDLE HEATING Default TURBO 1112 1132 1152...
Page 62 45MUAA: Installation Instructions 1600 1400 1200 1000 0.15 External sta c pressure (in.w.c.) COOLING Default TURBO 1600 1566 1532 1498 1464 1430 1396 1362 1328 1294 1260 HIGH 1471 1437 1403 1369 1335 1301 1267 1233 1199 1165 1131 MIDDLE...
Page 63 45MUAA: Installation Instructions 45K CONT HEATING Default TURBO 1600 1566 1532 1498 1464 1430 1396 1362 1328 1294 1260 HIGH 1382 1348 1314 1280 1246 1212 1178 1144 1110 1076 1042 MIDDLE 1141 1107 1073 1039 1005 HEATING Default TURBO...
Page 64 45MUAA: Installation Instructions 1800 1600 1400 1200 1000 0.148 External sta c pressure (in.w.c.) COOLING Default TURBO 1806 1786 1766 1746 1726 1706 1686 1666 1646 1626 1606 HIGH 1582 1562 1542 1522 1502 1482 1462 1442 1422 1402 1382...
Page 65 45MUAA: Installation Instructions 60K CONT HEATING Default TURBO 1659 1639 1619 1599 1579 1559 1539 1519 1499 1479 1459 HIGH 1582 1562 1542 1522 1502 1482 1462 1442 1422 1402 1382 MIDDLE 1247 1227 1207 1187 1167 1147 1127 1107...
Page 66 45MUAA: Installation Instructions TROUBLESHOOTING Table 36 — Error Codes DISPLAY MALFUNCTION AND PROTECTION INDICATION EC07 ODU fan speed out of control ODU malfunction EC0d ODU EEPROM parameter error EC51 ODU coil temp sensor error EC52 ODU ambient temp sensor error...
Page 67 45MUAA: Installation Instructions COMMON ISSUES Table 38 — Common Issues ISSUE POSSIBLE CAUSE The Unit has a 3-minute protection feature that prevents the unit from overloading. The unit can- Unit does not turn on when pressing ON/OFF. not be restarted within three minutes of being turned off.
Page 68 45MUAA: Installation Instructions Table 39 — Common Issues PROBLEM POSSIBLE CAUSES SOLUTION Temperature setting may be higher than ambient Lower the temperature setting room temperature The heat exchanger on the indoor or outdoor unit is Use Clean function by remote control to...
Page 69 45MUAA: Installation Instructions START-UP CHECKLIST - Single Zone Installation Data Site Address:_______________________________________________________________________________________________________ City:________________________________________________________ State:___________ Zip Code:__________________ Installing Contractor:______________________________________________________ Contractor Contact #: ( ) _____-___________ Job Name:_______________________________________________________________ Start-up Date:_____________________________ Distributor:_______________________________________________________________ System Details UNITS MODEL NO. SERIAL NO. CONTROLLER OUTDOOR UNIT INDOOR UNIT A...
Page 70 45MUAA: Installation Instructions Start-Up Checklist (CONT) Piping Leak Check: System held 500 psig (max. 550psi) for a minimum of 30 minutes using dry nitrogen. YES:______ NO:______ Evacuation Method: • YES:______ NO:______ Was the Triple Evacuation Method used as outlined in the installation manual? •...
Page 71 45MUAA: Installation Instructions Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Page 72 45MUAA: Installation Instructions © 2024 Carrier. All rights reserved. Edition Date: 10/24 Catalog No: 45MUAA-01SI Replaces: NEW Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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