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38MVRA
Ductless Split Unit System
Sizes 9, 12, 18 and 24
Fig. 1 - Outdoor Unit
NOTE: Read the entire instruction manual before starting the
installation.
Installation Instructions
Specifications subject to change without notice.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS........................................................2
INTRODUCTION ............................................................................3
PARTS LIST ....................................................................................3
DIMENSIONS..................................................................................4
CLEARANCES ................................................................................7
SYSTEM REQUIREMENTS...........................................................8
SYSTEMS PERFORMANCE..........................................................8
OUTDOOR UNIT INSTALLATION ..............................................9
Step 1 - Select Installation Location.................................................9
Step 2 - Install the Drain Joint (Heat Pump Unit Only) ...................9
Step 3 - Anchor the Outdoor Unit.....................................................10
Step 4 - Connect the Signal and Power Cables.................................10
Step 5 - Refrigerant Piping ...............................................................11
Step 6 - Evacuate Coil and Tubing System ......................................13
WIRING ...........................................................................................14
Step 7 - Electrical And Gas Leak Checks.........................................14
TEST RUN .......................................................................................15
ELECTRICAL DATA......................................................................15
CONNECTION DIAGRAMS ..........................................................16
START-UP .......................................................................................17
CARE AND MAINTENANCE........................................................17
TROUBLESHOOTING ...................................................................17
OUTDOOR UNIT DIAGNOSTIC GUIDES ...................................18
DUCTLESS START-UP CHECKLIST - SINGLE ZONE..............19
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Related Manuals for Carrier Midea 38MVRA
Summary of Contents for Carrier Midea 38MVRA
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Page 1: Table Of Contents
38MVRA Ductless Split Unit System Sizes 9, 12, 18 and 24 Installation Instructions TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS............2 INTRODUCTION ................3 PARTS LIST ..................3 DIMENSIONS..................4 CLEARANCES ................7 SYSTEM REQUIREMENTS............8 SYSTEMS PERFORMANCE............8 OUTDOOR UNIT INSTALLATION ..........9 Step 1 - Select Installation Location..........9 Step 2 - Install the Drain Joint (Heat Pump Unit Only) ....9 Step 3 - Anchor the Outdoor Unit.............10 Step 4 - Connect the Signal and Power Cables.........10... -
Page 2: Safety Considerations
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.). ELECTRICAL SHOCK HAZARD Only trained, qualified installers and service mechanics should install, Failure to follow this warning could result in personal injury or start- up, and service this equipment. -
Page 3: Introduction
INTRODUCTION NOTE: - If the outdoor unit is higher than the indoor unit, prevent rain from The outdoor units are R-410A condensing units designed with flowing into the indoor unit along the connection pipe by making a application flexibility in mind. These units have a max total piping downward arc in the connection pipe before it enters the wall to the length up to 164 ft (50 m) and a maximum piping lift of up to 82 ft indoor unit. -
Page 4: Dimensions
DIMENSIONS Table 3 — Dimensions System Size 9K (115V) 12K (115V) 9K (208/230V) 12K (208/230V) 18K (208/230V) 24K (208/230V) Unit Height (H) in (mm) 19.49 (495) 19.49 (495) 19.49 (495) 19.49 (495) 21.85 (555) 26.50 (673) Width (W) in (mm) 28.35 (720) 28.35 (720) 28.35 (720) - Page 5 DIMENSIONS (CONT) Fig. 4 — Dimensions 18K 38MVRA-01SI Specifications subject to change without notice.
- Page 6 DIMENSIONS (CONT) Fig. 5 — Dimensions 24K Specifications subject to change without notice. 38MVRA-01SI...
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Page 7: Clearances
CLEARANCES Air inlet Air outlet Fig. 6 — Clearances Table 4 — Clearance Dimensions UNIT MINIMUM VALUE IN. (MM) 24 (610) 24 (610) 24 (610) 4 (101) 4 (101) NOTE: The outdoor unit must be mounted at least 2in (50mm) above the maximum anticipated snow depth. 19in (48cm) or more on a multiple parallel unit arrangement 4in (10cm) -
Page 8: System Requirements
SYSTEM REQUIREMENTS Piping IMPORTANT: Both refrigerant lines must be insulated Allow sufficient space for airflow and service of the unit. See Fig. 8 separately. — on page 9 for the required minimum distances between the unit, Table 5 contains piping information for the product covered within walls or ceilings. -
Page 9: Outdoor Unit Installation
OUTDOOR UNIT INSTALLATION Step 2 - Install the Drain Joint (Heat Pump Unit Only) Install the unit by following local codes and regulations. Before bolting the outdoor unit in place, you must install the drain joint at the bottom of the unit. Note that there are two different types of drain joints depending on the type of outdoor unit. -
Page 10: Step 3 - Anchor The Outdoor Unit
Step 3 - Anchor the Outdoor Unit The outdoor unit can be anchored to the ground or to a wall-mounted 1. Mark the position of the bracket holes based on the dimensions bracket with bolt (M10). Table 7 provides a list of different outdoor chart. -
Page 11: Step 5 - Refrigerant Piping
Step 5 - Refrigerant Piping When connecting refrigerant piping, do not allow substances or gases Cover other than the specified refrigerant to enter the unit. The presence of other gases or substances will lower the unit’s capacity, and can cause abnormally high pressure in the refrigeration cycle. -
Page 12: Valve Cover
Connect Piping to the Outdoor Unit Handle 1. Unscrew the cover from the packed valve on the side of the outdoor Yoke unit. Cone 2. Remove the protective caps from the valve ends. 3. Align the flared pipe end with each valve, and tighten the flare nut Copper pipe as tightly as possible by hand. -
Page 13: Step 6 - Evacuate Coil And Tubing System
Step 6 - Evacuate Coil and Tubing System Evacuation Evacuation of the system will remove air or nitrogen (non-condensables) as well as moisture. A proper vacuum will assure a tight, dry system CAUTION before charging with refrigerant. The two methods used to evacuate a system are the deep vacuum method and the triple vacuum method. -
Page 14: Wiring
WIRING Step 7 - Electrical And Gas Leak Checks Size all wires per the NEC (National Electrical Code) or CEC Before Test Run (Canadian Electrical Code) and local codes. Use the electrical data Only perform a test run after you have completed the following. from the outdoor unit (MCA - minimum circuit amps and MOCP - maximum over current protection), to correctly size the wires and the •... -
Page 15: Test Run
TEST RUN Double Check Pipe Connections During operation, the pressure of the refrigerant circuit increases. This Instructions may reveal leaks that were not present during your initial leak check. Take time during the Test Run to double-check that all refrigerant pipe You should perform the Test Run for at least 30 minutes. -
Page 16: Connection Diagrams
CONNECTION DIAGRAMS Fig. 24 — Connection Diagram 115V Fig. 25 — Connection Diagram 230V Specifications subject to change without notice. 38MVRA-01SI... -
Page 17: Start-Up
START-UP CARE AND MAINTENANCE Test Operation To help ensure high performance and minimize possible equipment failure, periodic maintenance must be performed on this equipment. Perform a test operation after completing a gas leak and electrical Maintenance frequency may vary depending upon geographic areas. safety check. -
Page 18: Outdoor Unit Diagnostic Guides
OUTDOOR UNIT DIAGNOSTIC GUIDES For ease of service, the systems are equipped with diagnostic code display LEDs on both the indoor and outdoor units. The outdoor diagnostic is displayed on the outdoor unit microprocessor board. There may be a few error codes displayed in the indoor unit that might relate to the outdoor unit's problems. -
Page 19: Ductless Start-Up Checklist - Single Zone
DUCTLESS 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 Are the outdoor unit and indoor unit compatible? YES:______ NO:______ Wiring Electrical... -
Page 20: Performance Check
Ductless 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? •...
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