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Literature Part No: LIT-WMMS-II-0103-20100814

INSTALLATION & SERVICE MANUAL

Wall Mount Mini Split Systems

Single-Zone

Cooling and Heat Pump W or W/O Heater

Literature Part No: Lit-WMMS-0103-20100814

For WMMS Series of Product 09 to 60K Btu/h Single-Zone (Cooling, Heat Pump W or W/O Ele. Heater)

Subject to Continuous Engineering Improvement without Prior Notice.

YMGI, A COMFORT MAKER, A JOY COMPANION, A SATISFACTION GUARANTOR...

(This Installation Instruction is Good for Mini Split Wall Mount Product Line of Different Brands

Made by YMGI Group-YMGI, YMGI Products, and Others Claimed by YMGI Group,

POB 1559, O'Fallon, MO, USA-Check with info@ymgigroup.com or sales@ymgigroup.com)

This product is designed and manufactured free from defects in material and workmanship under the normal use and

maintenance. Installation, operation, maintenance and service shall follow professional practices for regular cooling and

heating equipment, NEC, State, City or Local Codes and related manuals from us. Otherwise, damage to equipment or

property even injury to people may occur.

Installer: Currently licensed HVAC installer only, Read this manual before installation. Sign on the warranty registration card.

User: Keep this manual for future maintenance and service use.

Servicer: Use this manual for service reference.

Summary of content (18 pages)

PAGE 1
YMGI, A COMFORT MAKER, A JOY COMPANION, A SATISFACTION GUARANTOR... INSTALLATION & SERVICE MANUAL Wall Mount Mini Split Systems M3 Single-Zone Cooling and Heat Pump W or W/O Heater (This Installation Instruction is Good for Mini Split Wall Mount Product Line of Different Brands Made by YMGI Group-YMGI, YMGI Products, and Others Claimed by YMGI Group, POB 1559, O'Fallon, MO, USA-Check with info@ymgigroup.com or sales@ymgigroup.
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VERY IMPORTANT NOTES FOR END USERS (CUSTOMERS) AND INSTALLATION CONTENTS VERY IMPORTANT NOTES FOR END USERS (CUSTOMERS) AND INSTALLATION BEFORE INSTALLATION IDENTIFY COMPONENTS CONNECTION OF WIRES-SINGLE ZONE CONNECTION OF WIRES GET READY FOR INSTALLATION OPERATING TEMPERATURE RANGES INDOOR UNIT-MAJOR COMPONENTS REMOTE CONTROL ATTENTIONS-MUST READ AND FOLLOW THE FOLLOWING, PRIOR TO CONNECTING REFRIGERANT LINES BRIEF INTRODUCTION TO MINI SPLIT WALL MOUNT SYSTEM IMPORTANT NOTES IMPORTANT NOTES FOR UNIT OPERA
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BEFORE INSTALLATION IDENTIFY COMPONENTS CONNECTION OF WIRES-SINGLE ZONE WIRING AT INDOOR UNIT AND OUTDOOR UNITS INDOOR UNIT * Open the front cover panel. * Remove screws from electrical box cover and put screws in secured position. * Remove screws from fastener and put screws in secured position. * Prepare wires of right size and grade. * Recommend to use factory-provided wire/cables. * Connected to the terminals following wiring diagrams (terminal or color matches).
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CONNECTION OF WIRES GET READY FOR INSTALLATION PIPING AND WIRING SIZES Model LIST OF RECOMMENDED TOOL Power Wire Min/Max.
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OPERATING TEMPERATURE RANGES INDOOR UNIT-MAJOR COMPONENTS These units are designed for general T-1 weather conditions as outlined in the following table: Recommended Temperature Recommended Temperature Ranges-Indoor Side Ranges-Outdoor Side Mode Dry Bulb Wet Bulb Mode Dry Bulb Cooling 61 to 1050F (16 to 40.50C) NA Cooling 45 to 115oF (7 to 46.
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ATTENTIONS-MUST READ AND FOLLOW THE FOLLOWING, PRIOR TO CONNECTING REFRIGERANT LINES REMOTE CONTROL 1. Metering device is installed in this outdoor condensing unit, no other metering device needs to be field-installed anywhere else. 2. One refrigerant filter/strainer is installed in the outdoor unit, no other filter/strainer needs to be field-installed anywhere else, otherwise it may cause extra pressure drop and even system under-performance or other problems. 3.
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BRIEF INTRODUCTION TO MINI SPLIT WALL MOUNT SYSTEM Mini Split Wall Mount Systems are designed for high performance, easy installation and service. Each system consists of one or several indoor units and one outdoor unit, which are connected by one set or several multiple sets of interconnection refrigerant pipes and electric wires. As shown in the following sample picture of outdoor unit, air is drawn through the coil from the rear side and then discharged from the front side.
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IMPORTANT NOTES IMPORTANT NOTES * Good unit may not work properly or correctly. as designed or manufactured, if not installed properly or correctly. * Customer do-it-yourself (DIY) installation caused and/or will cause trouble to the unit and your property and yourself. * YMGI doesn’t allow nor recommend nor honor warranty for DIY installation. Customers take full responsibility for DIY installation. * DIY installation may save money at the front, but cost you more down the road, money and other headache.
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IMPORTANT NOTES FOR UNIT OPERATION ABMIENT & SIZING DRY MODE OPTIONS AT MANUFACTURE OR AFTER SALES: * Advanced Health Kits (HEPA/Enzyme/ Cold Catalyst Filter, Light Wave, Or, Anion Generator) * Treated Coil * Plug & Connect Copper Line Set * Rust-free Cabinet * Plug & Connect Valves * Low Ambient Control * Wall Mount Line Control * Cabled Defrost Control System Model COOLING ONLY WMMS-18K-31B WMMS-12E-31A WMMS-18E-31B WMMS-24E-31B Outdoor Unit WMMS-09C-31A WMMS-12C-31A WMMS-18C-31B WMMS-24C-31B
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INTRODUCTION INTRODUCTION INSTALLATION LOCATIONS CLEARANCE REQUIRED AROUND UNITS-SINGLE ZONE The location and structure shall also be convenient for both installation and service. The location shall NOT be where discharge air and noise could bother your neighbor. The location shall NOT be somewhere drain may cause any damage to property or bother the neighbor. The location shall NOT be somewhere soldering or torching work may cause fire or smoke to the materials around.
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INSTALLATION POSITIONS FOR OUTDOOR UNIT DURING INSTALLATION-INDOOR UNIT * To be installed at the position where the air delivered from the unit can reach every comer of the room. * To avoid being affected by the outdoor air. * To avoid blockage to the air inlet or outlet of the unit. * To avoid too much oil smoke or steam. * To avoid possible generation, inflow, lingering or leakage of flammable gases. * To avoid high-frequency facilities (such as high frequency arc welders, etc.).
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DURING INSTALLATION-INDOOR UNIT DURING INSTALLATION-INDOOR UNIT REFIT DRAIN HOSE FROM THE RIGHT TO THE LEFT SIDE PREPARE INDOOR UNIT- COPPER LINE SET/DRAIN HOSE If pipes need to be rerouted to a different direction from the one preset at factory (towards left side, if facing the front cover of indoor unit), lay down the indoor unit on soft cushion or foam. Don't rub the plastic casing.
PAGE 13
INSTALLATION-OUTDOOR UNIT WIRING OUTDOOR UNIT INSTALL OUTDOOR UNIT CONNECT WIRING BETWEEN OUTDOOR UNIT AND INDOOR UNIT Strongly suggest to install the outdoor unit above the ground either on platform or brackets as shown below. Heat pump unit must be lift up from ground level, since condensate must be drained out of the drain pan in condensing unit; othewise, condensate may be iced up to damage the condensing unit. Suggest to use YMGI-provided brackets and condensate drainage fitting accessories.
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CONNECT REFRIGERANT PIPES BETWEEN INDOOR AND OUTDOOR UNITS CONNECT REFRIGERANT PIPES BETWEEN INDOOR AND OUTDOOR UNITS Firstly, connect copper tubes at indoor unit. Bend pipes by tools but not by hands. Extra length is needed for future service. Seal Copper Line Set/Wire Cable/Drain Hose Line Combination REFRIGERANT PIPES: For distance other than 25' between indoor and horizontal venting condensing units, refer to the following table for copper sizes.
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INSTALLATION ACCESSORIES VACUUM AND LEAKAGE CHECK CONNECT REFRIGERANT PIPES VACUUM REFRIGERANT PIPES Seal Copper Line Set/Wire Cable/Drain Hose Line Combination: Evacuate the pipes between indoor and outdoor units, using vacuum pump and manifold/gauge set, to a minimum of 500 microns (service valves remain front seated). Hold for 30 minutes to check if the vacuum level is maintained. Using dry nitrogen or other leakage detection tool for leak checking.
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CHECK AFTERNOTES INSTALLATION AND TEST OPERATION USER AND SERVICE LOG DURING INSTALLATION RELEASE REFRIGERANT FROM OUTDOOR TO THE INDOOR UNIT CHECK AFTER INSTALLATION Items to be checked Possible malfunction Has the been unit positioned firmly? The unit may drop, shake or emit noise. Have you done the refrigerant leakage test? It may cause insufficient cooling(heating) capacity. Is heat insulation sufficient? It may cause unexpected condensate and dripping.
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NOTES AND SERVICE LOG LIMITEDUSER PRODUCT WARRANTY POLICIES LIMITED PRODUCT WARRANTY REGISTRATION CARD LIMITED PRODUCT WARRANTY -STANDARD POLICIES YMGI Group (YMGI) products are designed and manufactured free from defects in workmanship and materials for normal use and maintenance. YMGI products are designed and manufactured to the qualities to keep installer(s) and user(s) from any trouble and to bring total comfort to unit(s) owner(s) and end user(s).
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WARRANTY AND TECH. SUPPORT USER NOTES AND SERVICE LOG YMGI warrants to the purchaser/owner(s) that YMGI products be free from defects in material and workmanship under the normal use and maintenance, with the standard Limited Product Warranty Policies that comes with the unit or sales package. USER NOTES Put down whatever questions you have or problems you have seen as a unit history: No.