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Heat RejectionEngineering ManualAir Cooled Condensers and Condensing Unitsfor use with Precision Air Conditioners (60 Hz)

NoticeThis document contains information protected by copyright. All rights are reserved. Theowner of the equipment for which this manual is written may photocopy the contents ofthis manual for internal purposes only. No part of this document may be photocopied,reproduced, or translated into another language for use by anyone other than the owner ofthe equipment for which this manual is written without the prior written consent of STULZAir Technology Systems, Inc. (STULZ).This document contains confidential and proprietary information of STULZ Air TechnologySystems, Inc. Distributing or photocopying this document for external distribution is indirect violation of United States copyright laws and is strictly prohibited without the expresswritten consent of STULZ.Unpublished rights reserved under the copyright laws of the United States and of othercountries. Other brands and trade names are trademarks of their respective owners. 2018 STULZ Air Technology Systems, Inc. Printed in the United States of America.All rights reserved.STULZ Air Technology Systems,Inc. 1572 Tilco DriveFrederick, MD 21704 USAhttps://www.stulz-usa.com

Our MissionOur mission is to be the premier provider of energy efficient temperature and humidity control solutions formission critical applications.We are dedicated to providing innovative solutions for critical temperature and humidity control needs. STULZdesigns and manufactures specialized, energy efficient, environmental control equipment. STULZ serves adiverse marketplace; our customers represent a variety of industries including telecommunications,information technology, medical, financial, educational, industrial process and government.Our world-class island manufacturing processes takes place in a modern, 150,000 ft2 facility located inFrederick, MD USA. STULZ combines a global network of sales and service companies with an extensivefactory engineering staff and highly flexible manufacturing resources dedicated to providing world-classquality, innovation and customer service.This commitment to excellence, along with a standard two-year warranty, fast lead times, and outstandingcustomer service, make STULZ the perfect choice for all your environmental control needs.STULZ offers solutions that help you reach your goals.Precision Air Conditioning Ceiling and Floor Mounted from 1-100 tons Air,Water, Glycol, Chilled Water Free Cooling Alternate Water SourceUltrasonic Humidifiers 4.4 - 39.6 pounds per hour Duct, AHU, Wall Mounted and Stand- aloneClean, Energy Efficient Adiabatic CoolingISO-9001 Quality RegisteredWe are committed to satisfying customer expectations by meeting and exceeding requirements. Our QualityPolicy ensures that every Employee is committed to Customer Satisfaction, Teamwork and using ContinuousProcess Improvement methods to deliver an exceptional product. We continually measure our performanceto improve the effectiveness of our quality management system.Air Cooled Condensers: Common FeaturesAll STULZ Remote Air Cooled Condensers and condensing units are designed to be the most efficient andreliable, heat rejection condensers in the industry. Each unit is self-contained in a light weight, corrosionresistant aluminum cabinet designed for mounting to a horizontal surface. The cabinet houses the condensercoil(s) and fan assembly(s). The electrical controls are in an integrally mounted, weatherproof enclosure whichis isolated from the rest of the equipment. There are several cabinet sizes available depending on the capacityand type of unit.

HeatTable of ContentsSCS-MC Micro-Channel Outdoor AirCooled Condensers .8Performance Data — AA, SA & EC Models . 1LN Models. 1Technical Data .2Altitude Correction . 2Dimensions and Weights . 2Technical Data — A/C Models Used With . 3Technical Data . 5Electrical Data — SCS-MC Condensers WithoutOutdoor Receiver- Single and Dual Circuit . 7Electrical Data — SCS-MC Condensers WithIntegral Receiver- Single Circuit . 8SAA Models . 8SSA Models . 8SEC and SLN Models . 8Electrical Data — SCS-MC Condensers withIntegral Receiver - Dual Circuit . 9DAA Models . 9DSA Models . 9DEC and DLN Models . 9Dimensional Data — SCS-MC Micro-Channel AirCooled Condensers – 015/018/031/035 S - SingleCircuit . 10Dimensional Data — SCS-MC Micro-Channel AirCooled Condensers - 056/071/111-S - SingleCircuit . 11Dimensional Data — SCS-MC Micro-Channel AirCooled Condensers - Dual Circuit . 12Dimensional Data — SCS-MC Micro-Channel AirCooled Condensers 071/111-D - Dual Circuit . 13Dimensional Data — SCS-MC Micro-Channel AirCooled Condensers – 128/142-D - Dual Circuit . 14Dimensional Data — SCS-MC Micro-Channel AirCooled Condensers 223-D (2x2/1x4) - Dual Circuit. 15Dimensional Data — SCS-MC Micro-Channel AirCooled Condensers – 264/334-D - Dual Circuit . 16Product Guide Specifications . 17Model SCS-MC 54-1, 211 MBH . 17Micro-Channel Air Cooled Condenser . 17Summary . 17Design Requirements . 17(AA) 0 F Fan Cycling (OHS only) . 17(SA) -20 F Variable Fan Speed Control . 17(EC) -20 F Intelligent Control . 17(LN) -20 F Low Noise Intelligent Control . 17-30 F Flooded Head Pressure Control withReceiver. 17Refrigerant . 18Quality Assurance . 18Cabinet . 18Mechanical Components . 18AC And EC Axial Fans . 18Micro-Channel Coil . 18Air Filter (Optional) . 18Electrical System . 18Main Power Service Switch . 18Code Conformance . 19SCS Outdoor Air Cooled Condensers. 20Performance Data — AA, SA & EC Models . 22Altitude Correction . 22Technical Data — SCS Condenser. 23Dimensions and Weights . 23A/C Models Used With . 23Technical Data — A/C Models Used With . 24Technical Data — SCS Outdoor Air CooledCondensers- Single Circuit . 25Technical Data — SCS Outdoor Air CooledCondensers- Dual Circuit . 26Technical Data — SCS Outdoor Air CooledCondensers- Dual Circuit . 27Electrical Data — SCS Condensers withoutReceiver Skid- Single and Dual Circuit . 28AA Models . 28SA Models . 28Electrical Data — SCS Condensers withoutReceiver Skid- Single and Dual Circuit . 29Electrical Data — SCS Condensers with ReceiverSkid- Single Circuit . 30SAA Models . 30SSA Models . 30SEC Models . 30Electrical Data — SCS Condensers with ReceiverSkid- Dual Circuit. 31DAA Models . 31DSA Models . 31Electrical Data — SCS Condensers with ReceiverSkid- Dual Circuit. 32DEC Models . 32Dimensional Data — SCS 912 to SCS 144 Outdoor Air Cooled Condensers . 33Dimensional Data — SCS - 102 to SCS - 683Outdoor Air Cooled Condensers . 34Dimensional Data — SCS 940 - Outdoor Air CooledCondensers . 35Dimensional Data — SCS – 1366 - Outdoor AirCooled Condensers. 36Dimensional Data — Receiver Skids - For -30 FApplications . 37Dimensional Data — Receiver Skids - For -30 FApplications . 38Product Guide Specifications . 39Model SCS 17 – 1,288 MBH . 39Air Cooled Condenser. 39Summary . 39Design Requirements . 39

Heat(AA) 0 F Fan Cycling (OHS only) . 39(SA) -20 F Variable Fan Speed Control . 39(EC) -20 F Intelligent Control . 39(AA) -30 F Flooded Head Pressure Control WithReceiver . 39CeilAir (OHS) Models:. 39CyberAir (CFU/CFD, CRS, VFS, COS, MCS, and(FCS) Models . 39Refrigerant . 40Quality Assurance . 40Cabinet . 40Mechanical Components . 40AC And EC Axial Fans . 40Coil . 40Electrical Systems . 40Main Power Service Switch . 40Code Conformance . 40Technical Data — Model OHS-RCU. 54A/C Models Used With . 54Technical Data — OHS-RCU . 55Outdoor Condensing Units . 55Indoor Condensing Unites . 55Electrical Data . 56Outdoor Condensing Units . 56Indoor Condensing Units . 56Dimensional Data — OHS-012 to 060Outdoor RCU. 57Dimensional Data –OHS-012 to 060 Indoor RCU . 58Dimensional Data — OHS-048D to120D Indoor RCU . 59HES Indoor Air Cooled Condensers. 40 Product Guide Specifications . 60Features . 42Performance/Technical Data — HES Indoor AirCooled Condensers . 43Altitude Correction . 43Dimensions and Weights . 43Technical Data — HES Indoor Air CooledCondensers . 44Electrical Data — HES Indoor Air CooledCondensers . 45Dimensional Data HES – 012 to 060-CAA Indoor AirCooled Condenser Single Circuit . 46. 46Dimensional Data — HES 048D to 120D-CAAIndoor Air Cooled Condenser Dual Circuit. 47Product Guide Specifications . 48Model HES 18 – 153 MBH . 48Summary . 48Design Requirements . 480 F Fan Cycling . 48-30 F Flooded Control . 48Refrigerant . 48Quality Assurance . 48Cabinet . 48Electrical System . 48Code Conformance . 49OHS-RCU — Indoor/Outdoor Air CooledCondensing Units . 50Features . 51Performance Data — OHS-RCU Indoor/Outdoor AirCooled Condensing Units . 52OHS RCU Outdoor Models . 52OHS RCU Indoor Models . 52Altitude Correction . 52Technical Data — OHS-RCU Indoor/Outdoor AirCooled Condensing . 53Units Dimensions and Weights- Outdoor Models. 53Dimensions and Weights- Indoor Models . 53Model OHS-RCU 18 to 153 MBH . 60Condensing Unit . 60Design Requirements . 60Outdoor Remote Condensing Units . 60(Models OHS-( )-RCU-O). 600 F Fan Cycling . 60-30 F Flooded Control. 60Indoor Remote Condensing Units . 60(Models OHS-( )-RCU-I) . 60-30 F Flooded Control. 60Refrigerant . 60Quality Assurance . 61Cabinet . 61Electrical System . 61Code Conformance . 61

HeatSCS MC Offers Outstanding AdvantagesChoosing an Outdoor Air Cooled CondenserSTULZ offers a standard Air Cooled condenser and aMicro- Channel based design. Capacity, environment,and other application specific requirements may dictatethe use of a particular unit. When possible, choose thelatest Micro-Channel Condenser.Heat Rejection Engineering ManualMicro-Channel Design Micro-Channel condenser coil technologyAll aluminum brazed fin constructionFins located between flat micro-channel tubesTwo refrigerant manifoldsA Micro-Channel Air Cooled condenser provides thesame heat rejection as the standard unit with thefollowing increased efficiencies: 20% less refrigerant 40% smaller footprint 50% lighter weightMicro-Channel DesignMicro-Channel CoilMicro-Channel Condenser FeaturesMicro-Channel Condensers are high efficiency state-of-the-art condensers with high total heat rejection, reducedweight, a smaller footprint, and improved Standard Coefficient of Performance (SCOP).Thermal Performance Improved heat rejection compared to astandard 3-row, Al/Cu coil Low ambient temperature control options(-30 F)- Factory installed and piped receiverEfficiency Uses highly efficient axial fans with AC & ECmotor configurations Integrated control box with main disconnectand motor protection Various fan speed control options basedon refrigerant pressureBuild Quality Structurally Robust - more durable, evenwith significant weight reduction Superior corrosion resistance due to allaluminum construction (cabinet and fins) Aluminum brazed fin construction superior to Al/ Cu(2- metal) coilsEnvironmentally Friendly R-410A and R-407C refrigerant Smaller volume, up to 20% less refrigerant useServiceability Easily cleaned and field repaired Optional pre-filters for easy maintenance

Heat Rejection Engineering ManualSCS-MC Micro-Channel Outdoor Air Cooled CondensersModel SCS-MC-142-D ShownSee Model Nomenclatures on next page.