Carrier 37MGHAQ Installation Instruction

Outdoor multi zone ductless system sizes 18k-55k

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37MGHAQ

Outdoor Multi Zone Ductless System

Sizes 18K-55K

Fig. 1 - Single Fan (Sizes 18K - 36K

Fig. 2 - Dual Fan (Sizes 48K - 55K)

NOTE: Read the entire instruction manual before starting the

installation.

NOTE: Images are for illustration purposes only. Actual models

may differ slightly.

Installation Instruction

Specifications subject to change without notice.

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

PRIOR TO INSTALLATION ..........................................................10

ACCESSORIES................................................................................11

MODELS..........................................................................................11

DIMENSIONS..................................................................................11

CLEARANCES ................................................................................16

INSTALLATION SUMMARY........................................................18

A. INSTALLATION INSTRUCTION.............................................19

Step 1 - Select the Installation Location ...........................................20

Step 2 - Install the Drain Joint ..........................................................20

Step 3 - Anchor the Outdoor Unit.....................................................21

B. REFRIGERANT CONNECTION INSTRUCTION ...................22

C. PIPE LENGTH AND DROP HEIGHT .......................................24

D. WIRING INSTRUCTION...........................................................25

E. AIR EVACUATION....................................................................29

F. TEST RUN ...................................................................................32

TROUBLESHOOTING ...................................................................34

DUCTLESS START-UP CHECKLIST - Multi Zone.....................37

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Summary of Contents for Carrier 37MGHAQ

Page 1: Table Of Contents
37MGHAQ Outdoor Multi Zone Ductless System Sizes 18K-55K Installation Instruction TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS............2 PRIOR TO INSTALLATION ............10 ACCESSORIES................11 MODELS..................11 DIMENSIONS..................11 CLEARANCES ................16 INSTALLATION SUMMARY............18 A. INSTALLATION INSTRUCTION..........19 Step 1 - Select the Installation Location ...........20 Step 2 - Install the Drain Joint ............20 Step 3 - Anchor the Outdoor Unit.............21...
Page 2: Safety Considerations
37MGHAQ: Installation Instructions SAFETY CONSIDERATIONS WARNING Installing, starting up, and servicing air- conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.). PERSONAL INJURY AND PROPERTY DAMAGE HAZARD Only trained, qualified installers and service mechanics should install, For continued performance, reliability, and safety, the only start- up, and service this equipment.
Page 3 37MGHAQ: Installation Instructions WARNING WARNING Turn off the air conditioner and disconnect the power before FOR FLAMMABLE REFRIGERANTS performing any installation or repairing. Failure to do so can cause Do not use means to accelerate the defrosting process or to clean, electric shock.
Page 4 37MGHAQ: Installation Instructions LEAK DETECTION SYSTEM installed. Unit must be powered 3. Qualification of Workers except for service. For the unit with refrigerant sensor, when the Any maintenance, service and repair operations must be required refrigerant sensor detects refrigerant leakage, the indoor unit will qualification of the working personnel.
Page 5 37MGHAQ: Installation Instructions 8. Checks to the refrigeration equipment If a leak is suspected, all naked flames shall be removed/extin- guished. Where electrical components are being changed, they shall be fit for If a leakage of refrigerant is found which requires brazing, all of the the purpose and to the correct specification.
Page 6 37MGHAQ: Installation Instructions 16. Decommissioning The recovered refrigerant shall be processed according to local legislation in the correct recovery cylinder, and the relevant waste transfer note Before carrying out this procedure, it is essential that the technician is arranged. Do not mix refrigerants in recovery units and especially not in completely familiar with the equipment and all its detail.
Page 7 37MGHAQ: Installation Instructions For R454B refrigerant charge amount and mini- mum room area Requirements for room area limits using R454B refrigerant in unventilat- ed areas: Our multiple systems are all confirmed to meet the requirement of Enhanced Tightness Refrigerating Systems. Units installed at a height not exceeding 1.8m above the ground are usually equipped with refriger-...
Page 8 37MGHAQ: Installation Instructions Table 1 — A (min) HO, RELEASE HEIGHT FT (M) MC OR MREL ≤ 7.2 (2.2) 7.5 (2.3) 7.9 (2.4) 8.5 (2.6) 9.2 (2.8) 9.8 (3.0) LBS (KG) ≤ 3.91 (1.776) 12 (1.10) 4.0 (1.8) 60 (5.53) 57 (5.29)
Page 9 37MGHAQ: Installation Instructions For releasable charge limited system: SAFETY SHUT-OFF VALVES are used in some multiple outdoor units, as shown in the following table, for the purposes of limiting the releasable charge, which are activated by a leak detection system.
Page 10: Prior To Installation
37MGHAQ: Installation Instructions PRIOR TO INSTALLATION Before installing the indoor unit, ensure 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 calcu- lation for proper sizing.
Page 11: Accessories
37MGHAQ: Installation Instructions ACCESSORIES The system is shipped with the following accessories. Use all of the installation parts and accessories needed 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 work has been completed.
Page 12 Fig. 3 — Size 18K...
Page 13 Fig. 4 — Size 24K...
Page 14 Fig. 5 — Sizes 30K and 36K...
Page 15 Fig. 6 — Sizes 48K and 55K...
Page 16: Dimensions And Clearances
37MGHAQ: Installation Instructions DIMENSIONS AND CLEARANCES If you install the unit on the ground or on a concrete mounting platform, perform the following steps. 1. Mark the positions for four expansion bolts based on the dimensions NOTE: Drilling the Hole in the Wall chart.
Page 17 37MGHAQ: Installation Instructions Fig. 8 — Clearances - Single Fan Units 19in (48cm) or more on a multiple parallel unit arrangement 4in (10cm) or more on a single 9.8in (25cm) or more for parallel unit arrangement proper airflow 24in(61cm) or more is...
Page 18: Installation Summary
37MGHAQ: Installation Instructions INSTALLATION SUMMARY Install the outdoor unit Connect the refrigerant pipes Connect the wires Evacuate the Perform a test run refrigeration system Fig. 10 — Installation Sequence Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Page 19: Installation Instruction
37MGHAQ: Installation Instructions A. INSTALLATION INSTRUCTION IMPORTANT: Both refrigerant lines must be insulated separately. Use refrigeration grade tubing ONLY. No other • A location which is convenient to installation and not exposed to type of tubing may be used. Use of other types of tubing will strong winds.
Page 20: Step 1 - Select The Installation Location
37MGHAQ: Installation Instructions Step 1 - Select the Installation Location Before Installing the Outdoor Unit The following are standards that will help choose an appropriate location for the unit. Proper installation locations meet the following standards: 20in(500mm) or more when front...
Page 21: Step 3 - Anchor The Outdoor Unit
37MGHAQ: Installation Instructions Step 3 - Anchor the Outdoor Unit WARNING When drilling into concrete, eye protection is recommended at all times. • The outdoor unit can be anchored to the ground or to a wall-mounted bracket with bolt (M10). Prepare the installation base of the unit according to Figure 13.
Page 22: Refrigerant Connection Instruction
37MGHAQ: Installation Instructions B. REFRIGERANT CONNECTION c. Place factory flare nut on pipe facing the proper direction. Make sure they are facing the right direction. Once the ends are flared, it INSTRUCTION is impossible to put them on or change their direction.
Page 23 37MGHAQ: Installation Instructions CAUTION Wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite. Ensure the pipe is properly connected. Over tightening may damage the bell mouth and under tightening may lead to leakage.
Page 24: Pipe Length And Drop Height
37MGHAQ: Installation Instructions C. PIPE LENGTH AND DROP HEIGHT Ensure the length of the refrigerant pipe and the drop height between the indoor and outdoor units meets the requirements shown in Table 12. Table 12 — Refrigerant Piping 37MGHAQ30EA3 37MGHAQ48FA3...
Page 25: Wiring Instruction
37MGHAQ: Installation Instructions D. WIRING INSTRUCTION CAUTION All wires must be sized per NEC (National Electrical Code) or CEC (Canadian Electrical Code) and local codes. Use Electrical Data table MCA (minimum EQUIPMENT DAMAGE HAZARD circuit amps) and MOCP (maximum over current protection) to correctly size Failure to follow this caution may result in equipment damage or the wires and the disconnect fuse or breakers respectively.
Page 26: Wiring Precautions
37MGHAQ: Installation Instructions WIRING PRECAUTIONS NOTE: Choose the cable type according to the local electrical codes WARNING and regulations. CHOOSE THE RIGHT CABLE SIZE Before performing any electrical work, read these warnings. The size of the power supply cable, signal cable, fuse, and switch needed is determined by the maximum current of the unit.
Page 27: Terminal Connections
37MGHAQ: Installation Instructions TERMINAL CONNECTIONS 3 Port 1(C) 2(C) 3(C) L1 L2 1(A) 2(A) 3(A) 1(B) 2(B) 3(B) TO A TO B TO C Fig. 24 —Terminal Connections 4 Port L1 L2 1(B) 2(B) 3(B) 1(C) 2(C) 3(C) 1(A) 2(A) 3(A) 1(D) 2(D) 3(D) Fig.
Page 28 37MGHAQ: Installation Instructions 5 Port L1 L2 1(B) 2(B) 3(B) 1(C) 2(C) 3(C) 1(A) 2(A) 3(A) 1(D) 2(D) 3(D) 1(E) 2(E) 3(E) 30 and 36K Fig. 26 — Terminal Connections 6 Port L1 L2 TO A TO B TO C...
Page 29: Evacuation Instructions
37MGHAQ: Installation Instructions EVACUATION INSTRUCTIONS CAUTION 1. You can choose to evacuate all indoor unit systems directly through the main valve, which requires opening all branch valves of connected in- door units, or evacuate each indoor unit system sequentially through...
Page 30 37MGHAQ: Installation Instructions Flare nut A22026 valve body Fig. 32 — Triple Evacuation Method valve stem Fig. 29 —Evacuation Instructions NOTE ON ADDING REFRIGERANT Fig. 30 — Service Port CAUTION 13. Using a hexagonal wrench, fully open both the high pressure and low pressure valves.
Page 31 37MGHAQ: Installation Instructions Table 17 — Additional Refrigerant Per Pipe Length AIR PURGING CONNECTIVE PIPE LENGTH (M) ADDITIONAL REFRIGERANT METHOD Less than standard pipe length * N Vacuum Pump Liquid Side: Ø 1/4 in (Ø 6.35) R-454B Greater than standard pipe length * N (Total pipe length - standard length * N) x0.16oz / ft (15g / m)
Page 32: Safety And Leakage Check
37MGHAQ: Installation Instructions SAFETY AND LEAKAGE CHECK Ensure the manual buttons on the indoor unit works properly. Check to see that the drainage system is unimpeded and Electrical Safety Check draining smoothly. Perform the electrical safety check after completing installation. Cover...
Page 33: Operating Conditions
37MGHAQ: Installation Instructions Operating Conditions When your air conditioner is used outside of the following temperature ranges, certain safety protection features may activate and cause the unit to disable. Table 18 — Operating Temperature COOL MODE HEAT MODE DRY MODE ROOM TEMP.
Page 34: Troubleshooting
37MGHAQ: Installation Instructions TROUBLESHOOTING CAUTION If any of the following conditions occurs, turn off your unit immediately! • The power cord is damaged or abnormally warm • You smell a burning odor • The unit emits loud or abnormal sounds •...
Page 35 37MGHAQ: Installation Instructions When troubles occur, please check the following points before contacting a repair company. PROBLEM POSSIBLE CAUSES SOLUTION Temperature setting may be higher than ambient room Lower the temperature setting temperature The heat exchanger on the indoor or outdoor unit is...
Page 36: Error Codes
37MGHAQ: Installation Instructions ERROR CODES Table 20 — Error Codes For ease of service, the systems are equipped with diagnostic code DISPLAY MALFUNCTION AND PROTECTION INDICATION display LEDs on both the indoor and outdoor units. The outdoor EC07 ODU fan speed out of control...
Page 37: Ductless Start-Up Checklist - Multi Zone
DUCTLESS START-UP CHECKLIST - Multi 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 INDOOR UNIT B INDOOR UNIT C INDOOR UNIT D...
Page 38: Performance Check
Wall Controller: 24V Interface: Comments: __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ © 2024 Carrier. All rights reserved. Edition Date: 10/24 Catalog No: 37MGHAQ-01SI A Carrier company Replaces: NEW Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Carrier 37MGHAQ Installation Instruction

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