Heat pump and heat recovery outdoor vrf condensing units (132 pages)
Summary of Contents for LG MULTI F Series
Page 1
MULTI MULTI HEAT PUMP SYSTEM ENGINEERING MANUAL Multi-Zone Heat Pump Systems 1.5 to 4.5 Tons Dual and Tri-Zone Quad-Zone Eight-Zone Multi F Multi F Multi F MAX...
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PRODUCT INTRODUCTION “Unit Nomenclature” on page 6 “Outdoor Unit Overview” on page 7 “Indoor Unit Overview” on page 8 “Controls and Options Overview” on page 9...
MULTI F OUTDOOR UNIT DATA “Product Features and Benefits” on page 16 “Mechanical Specifications” on page 17 “General Data” on page 18 “Dimensions” on page 20 “Rated Cooling Combination Tables” on page 23 “Rated Heating Combination Tables” on page 31 “Cooling Capacity Tables”...
MULTI F MAX OUTDOOR UNIT DATA “Product Features and Benefits” on page 288 “Mechanical Specifications” on page 289 “General Data” on page 290 “Dimensions” on page 292 “Rated Cooling Combination Tables” on page 293 “Rated Heating Combination Tables” on page 296 “Cooling Capacity Tables ”...
MULTI F MAX BD UNIT DATA “Features and Benefits” on page 332 “Mechanical Specifications” on page 333 “General Data” on page 334 “Dimensions” on page 335 “Refrigerant Flow Diagram” on page 336 “Wiring Diagram” on page 337 “Y-Branch Accessory” on page 338 “Branch Distribution Unit Orientation”...
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In some designs, oversized indoor units may be unavoidable in the case where the smallest size indoor unit available from LG is larger than what is necessary to satisfy the zone load. This scenario may also occur when an indoor unit selection one size down from the selected unit is slightly short of fulfilling the design load requirements, and the designer must choose the next largest size unit.
LG Electronics, U.S.A., Inc., In all cases, the designer, installer, and contractor should understand if the suggested method is used, it is used at their own risk. LG Electronics U.S.A., Inc., takes no responsibility and offers no warranty, expressed or implied, of merchantability or fitness of purpose if this method fails to perform as stated or intended.
“Design Guideline Summary” on page 360 “Creating a Balanced / Quality Piping System” on page 362 “Manual Layout Procedure” on page 362 “LG Engineered Multi F MAX Y-Branch Kits” on page 363 “Refrigerant Charge” on page 364 “Selecting Field-Supplied Copper Tubing” on page 366 “Refrigerant Piping System Layout”...
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Multi F order. Following the installation, if any changes or variations to the design were necessary, an “as-built” LATS piping design software report must be provided to LG prior to system commissioning. User should always check the LATS report actual pipe layout versus pipe limits.
Field-Provided Isolation Ball Valves LG recommends installing field-supplied ball valves with Schrader ports at each indoor unit. Full-port isolation ball valves with Schrader ports (positioned between valve and indoor unit) rated for use with R410A refrigerant should be used on both the liquid and vapor lines.
Check the fit of the insulation jacket after the header fitting and all run-out pipes are installed. Mark all pipes at the point where the insulation jacket ends. Remove the jacket. Install field provided insulation on the run-out and main trunk pipes first. Install the LG-pro- vided insulation plugs on the ends of all unused header ports.
WIRING CONNECTIONS “General Information” on page 382 “Power Wiring (208-230V) and Communications Cable Details” on page 365 “Indoor Unit Group Control” on page 390...
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20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics Products Support EM-MultiFODU-01-15 1-888-865-3026 USA LG Electronics, U.S.A., Inc. Supersedes EM-MultiFODU-06-14 Follow the prompts for HVAC products. Commercial Air Conditioning Division Supersedes DFS-EM-AJ-001-US 014C25 11405 Old Roswell Road Supersedes DFS-EM-AJ-001-US 014A03...