The Importance of Clean Coils In Commercial Equipment
|
|
- Jeffery Goodman
- 8 years ago
- Views:
Transcription
1 Article reprinted with permission from RSES Journal, June 2002 The Importance of Clean Coils In Commercial Equipment Keeping coils clean helps equipment operate in nearnew conditions, which keeps customers happy, saves them money and reduces techs' headaches By Mark Stefura
2
3
4 Once again warm weather is upon us and our industry's services are in high demand. Knowing this, it is important to focus attention on one of the most neglected and overlooked aspects of the refrigeration cycle - coil cleanliness. The basic refrigeration cycle is based upon absorbing heat where it is not wanted and transferring it to another place where it is unobjectionable. When coils are dirty this heat transfer process is affected, but it is not the only repercussion. A decrease in system reliability and an increase in power consumption often are the results. A study on a typical 3-ton rooftop unit with a fixed-orifice metering device showed that if the evaporator airflow is restricted by 36 percent, the capacity drop is 19.4 percent. This changes the 3-ton unit to a 21/2-ton unit. On the other hand, when the condenser coils are 56 percent restricted, the capacity drops 10.9 percent. It should be noted that although capacity drop is not as great with dirty condenser coils as it is with dirty evaporator coils, the coefficient of performance (COP) or energy efficiency is severely affected. Simply stated, the unit has to work harder and longer to remove the heat and, therefore, will use more power. In these times of greater electricity demand, and with power companies trying to meet these demands, this should prompt both technician and customer alike to demand that equipment operate efficiently. Again, reliability also is an issue. A decrease in compressor life expectancy often is a result of liquid refrigerant returning into it. This may be due to improper airflow across the evaporator coil because of partial blockage or overcharging. Compressors
5 are designed for vapor compression and the introduction of a liquid into that equation sometimes can be catastrophic. This is just one example on the low side of the refrigerant cycle. On the high side, the compressor also is affected. The increased condensing temperature resulting from the dirty coils causes an increase in head pressure, which also increases the oil temperature. When oil reaches its critical point it no longer serves the purpose for which it is intended. Worse yet, oil breaks down into acidforming compounds when it reaches its critical point, which will destroy the system. Is a coil cleaning in order? Now that we know why coil cleanliness is important, it's time to focus on how to properly clean coils. When approaching a unit, especially for the very first time, the first thing to check for is a dirty coil. If the above-mentioned 3-ton unit was to move 400 cfm/ton across the evaporator, the same unit would move approximately 1,000 cfm/ton across the condenser coil. This is because the condenser not only removes the heat absorbed by the evaporator, it removes all the heat generated by the power input to the compressor. Condenser coils are good targets for thorough cleaning because they typically do not use any means of air filtration. The fastest and simplest way to determine if coils need to be cleaned is by measuring condenser?t. This is the temperature split between the air entering the condenser coil and the air leaving the condenser coil. Simply take your pocket thermometer and measure the temperatures. If a condenser?t of 30º F or higher is measured, a coil cleaning would be in order. Record this reading along with the other standard measurements a technician would check for proper system operation. Document all these readings because you are going to use them in future calculations. Once the coils are cleaned you will gather and document more information. You often may find that by cleaning the coils a system that may have had the appearance of being fully charged will show that the charge was altered to compensate for the reduction of heat transfer ability of the coils. If the condenser coils were dirty, the charge may have been reduced to bring the head pressure down without regard to subcooling. If the evaporator was partially blocked, the charge may have been removed to bring the reduced superheat back up to better reflect the amount called for on the equipment's charging chart.
6 Cleaning methods By now the necessary data has been gathered and it has been determined that the coils are dirty and need to be cleaned. What's the next step? Depending upon coil design and the size of the unit, different approaches can be used to do the cleaning. A successful method of cleaning commercial coils is the use of a pressure washer and the correct type of coil cleaner. Self-rinsing, detergent-style cleaners for evaporator coils and condensate pans are popular. The air usually is filtered and a stronger solution usually isn't required. For condenser coils, use an alkaline-type cleaner. Both acids and alkaline cleaners will burn your skin. Acid burns are much more difficult to treat, which leads to safety issues. When handling chemicals, wearing gloves and safety glasses is a must. Long sleeves and pants are better options than shorts and short sleeves. Also, wearing a full-face shield is a good idea, especially if there is a breeze that may cause the foam to become airborne. Read the labels and inquire at your wholesaler for Material Safety Data Sheets (MSDS). Maintaining safety and respect for chemicals is highly recommended. Take the necessary precautions to protect people and property. Plastic tarps and duct tape may be required to deal with overspray. Take the time to look over the equipment. Sometimes the condenser fans are so close to the coils that water penetrates the air ports. If this occurs, cover the ports with duct tape until the cleaning is completed. The same holds true for the evaporator coil cleaning procedure. The fan motor may need to be protected. The procedure itself is pretty simple: wet, wash, rinse, and repeat. This sounds like a trip to a hair salon, but this is how to battle dirt. Wet the coils down with a pressure washer. This gets the cleaning solution in deeper on multiple-pass coils. Wash the coils with the cleaner using the built-in chemical feeder on the pressure washer while following the manufacturer's instructions. Let the cleaner do its job by letting it set for the recommended time. Most condenser cleaners will foam out the dirt. Rinse thoroughly. This probably is a good time to point out that the phrase "more is better" doesn't apply. A chemical reaction takes place when the cleaner is applied. Condenser cleaners, when applied at higher-thanrecommended strength, can cause premature failure of coil fins. At times, one application is enough and at other times multiple applications will be required. Experience with different manufacturers' equipment is the best teacher. Some units require more attention than others. For instance, thick coils may need to be cleaned from both sides. Also, some manufacturers use condenser coils that are sandwiched together. This can be determined by looking at the return-bend end of the coil. Metal
7 clips usually hold each pass together. The manifold-end tube sheet is one solid piece so it can't be separated at this point. Be creative on how to support the top panel while opening the coil passes to clean each pass. Dirt that makes it past the first pass gets trapped on the face of the second, which then looks like a clothes dryer lint trap. Sometimes brushing the coils is required to remove big clumps of dirt. A nylon brush works well, and remember to brush in the direction of the fins. Don't flatten them. Cut off the end of an ice scraper and use the snowbrush portion for this task and to clean the condensate pan. Final tasks Once you have cleaned the coils and condensate pan, flushed the trap and drain line and put the unit back together, add some means of condensate pan treatment. Another time-saving method when working on rooftop units is to dry-fit one of the pvc fittings. Purposely leave one fitting unglued to allow easy removal of the trap during a maintenance inspection for cleaning. This comes in handy when at a site with multiple rooftop units. When dealing with split systems and chilled-water air handlers, install some form of cleanout, usually a T-fitting to flush water through to keep the trap and drain clean. If the T-fitting is installed between the trap and the air handler, it must be capped or the trap will not maintain a water seal. Remember that keeping the trap clean helps to keep the pan clean. It only makes sense to protect the customer's investment. Installing clean air filters also is a must. It would be an injustice to reinstall the same dirty filters. Once everything is back together it is time to gather more data. Record the outdoor ambient temperature and all the readings as stated earlier and compare what the system is doing now vs. before the coils were cleaned. Make necessary adjustments and document final readings. Knowing that you helped restore the equipment to its original operating conditions should have a positive effect on you and your customer. And remember, a contracting company is only as good as the tech it puts on the job.
8 Mark Stefura, CM, is a member of ASHRAE with 18 years of experience as a commercial hvac service technician.
Troubleshooting HVAC/R systems using refrigerant superheat and subcooling
Troubleshooting HVAC/R systems using refrigerant superheat and subcooling Application Note Troubleshooting and servicing refrigeration and air conditioning systems can be a challenging process for both
More informationHow much do you know about HVAC? Try testing yourself with the following questions and then take a look at the answers on the following page.
Demystifying HVAC Test Your HVAC Knowledge By Ron Prager How much do you know about HVAC? Try testing yourself with the following questions and then take a look at the answers on the following page. 1)
More informationHeating Ventilation and Air Conditioning Diagnostics for Single Family Homes
Heating Ventilation and Air Conditioning Diagnostics for Single Family Homes Vincent Pedalino FSL Home Improvements Phoenix, AZ 1 HVAC Basics Ways to improve the performance of existing air conditioning
More informationTroubleshooting an Air Conditioning system. R D Holder Eng. Roger D Holder MSME
Troubleshooting an Air Conditioning system R D Holder Eng. Roger D Holder MSME Troubleshooting of an air conditioning system is a step by step procedure. I have found that a 4 step procedure is the best
More informationIt will be available soon as an 8.5 X 11 paperback. For easier navigation through the e book, use the table of contents.
The System Evaluation Manual and Chiller Evaluation Manual have been revised and combined into this new book; the Air Conditioning and Refrigeration System Evaluation Guide. It will be available soon as
More informationAir Conditioning 101. STN Presentation AC101
Air Conditioning 101 What is Refrigeration? Refrigeration is Cooling by the Removal of Heat Heat is Measured In BTU s A BTU is a British Thermal Unit It is the Amount of Heat to Raise One Pound of Water,
More informationSECTION 5 COMMERCIAL REFRIGERATION UNIT 22 CONDENSERS
SECTION 5 COMMERCIAL REFRIGERATION UNIT 22 CONDENSERS UNIT OBJECTIVES After studying this unit, the reader should be able to explain the purpose of the condenser in a refrigeration system. describe differences
More informationHow to Maintain an Air Conditioner
How to Maintain an Air Conditioner by Fix-It Club How to Troubleshoot a Central Air Conditioning System Publications International, Ltd. Central air conditioners are made up of two separate components:
More informationAny Service Technician Can Fix It A Good Service Technician Can Figure Out What s Wrong With It.
I Dave s Statement If the thermostat calls for cooling, and the furnace fan is running properly, and the coil airflow is adequate, and the condenser fan is running properly, and the condenser airflow is
More informationBPI Air Conditioning & Heat Pump Professional Training Sample Slides ( ) Agenda
BPI Air Conditioning & Heat Pump Professional Training Sample Slides ( ) Photo of scott at AC with guages 1 Agenda Day I Refrigerants Introductions Verifying Charge Super Heat Paperwork & Sign-In Subcooling
More informationRefrigeration Basics 101. By: Eric Nelson
Refrigeration Basics 101 By: Eric Nelson Basics Refrigeration is the removal of heat from a material or space, so that it s temperature is lower than that of it s surroundings. When refrigerant absorbs
More informationTerms of Reference Air Handling Unit (HVAC System) Cleaning
Terms of Reference Air Handling Unit (HVAC System) Cleaning Introduction General cleaning of the air handling units is currently undertaken by the Mechanical Division staff composing of 3 personnel. Cleaning
More informationTransport Air Conditioning TRANSPORT AIR CONDITIONING OPERATOR S MANUAL. for SPLIT SYSTEM. Bus Air Conditioning Units.
R Transport Air Conditioning TRANSPORT AIR CONDITIONING OPERATOR S MANUAL for SPLIT SYSTEM Bus Air Conditioning Units T--326 Rev -- OPERATOR S MANUAL BUS AIR CONDITIONING UNITS GEN IV & GEN V CONTENTS
More informationCoil Cleaning Program
Coil Cleaning Program Procedures and Calculations that Affect your Bottom Line Fact: Did you know that annually cleaning HVAC coils reduces energy consumption in most cases enough to pay for the cleaning
More information123 street Salt Lake City, Utah 84092
Salt Lake City, Utah 84092 Prepared for: Sample AC inspection Prepared by: Page 1 of 8 Table of Contents Definitions 2 General Information 2 Air Conditioning 3 Heating System 6 Summary 8 Page 2 of 8 Definitions
More informationService Guide. Evaporator Coil Cleaning and Condensate Drain Maintenance Guidelines. ORDER No: UN-SVG001A-EN DATE: October 9, 2007
Service Guide Evaporator Coil Cleaning and Condensate Drain Maintenance Guidelines ORDER No: UN-SVG001A-EN DATE: October 9, 2007 Introduction This document defines American Standard and Trane s recommendations
More informationAir Conditioner Maintenance
Central air conditioning systems are wonderful features of many homes in the US. In hot and humid climates it s hard to imagine living without AC, although this convenience has been common in only the
More informationCharacteristics of Evaporators
Characteristics of Evaporators Roger D. Holder, CM, MSME 10-28-2003 Heat or Energy In this paper, we will discuss the characteristics of an evaporator coil. The variance of the operational condenses of
More informationCentral Air Conditioner
Central Air Conditioner USER S INFORMATION MANUAL FOR THE OPERATION AND MAINTENANCE OF YOUR NEW RESIDENTIAL AIR CONDITIONER NOTE TO INSTALLER: THIS MANUAL MUST BE LEFT WITH THE EQUIPMENT USER. WELCOME
More information1932 Lexington Houston, Texas 77098-4220 (713) 524-4877. Recommendations for installation of cooling systems
1932 Lexington Houston, Texas 77098-4220 (713) 524-4877 The purpose for this information is to provide a better understanding of the HVAC equipment, components, designs, and installations, of HVAC system
More informationHVAC Claims: Repair vs. Replacement
HVAC Claims: Repair vs. Replacement Curtis M. VanNess Field Operations Manager Outline Brief history of HVAC How do HVAC systems work? Types of systems and equipment Causes of failure Repair vs. Replace
More informationINSTALLATION INSTRUCTIONS Fan Coil Replacement Coil Kit EBX & EBXX
Fan Coil Replacement Coil Kit EBX & EBXX These instructions must be read and understood completely before attempting installation. These instructions covers the installation of replacement coil kit into
More informationPREVENTATIVE MAINTENANCE
PREVENTATIVE MAINTENANCE PREVENTIVE MAINTENANCE Sandwich Unit: Proper Operation Turn on at least 45 minutes before loading Load only pre-chilled food 34-37 F Move quickly from walk-in to sandwich unit
More informationGlossary of Heating, Ventilation and Air Conditioning Terms
Glossary of Heating, Ventilation and Air Conditioning Terms Air Change: Unlike re-circulated air, this is the total air required to completely replace the air in a room or building. Air Conditioner: Equipment
More informationPTAC Preventive Maintenance Guide. Step-by-step instructions and information to keep your units operating in peak condition
PTAC Preventive Maintenance Guide Step-by-step instructions and information to keep your units operating in peak condition The Importance of Proper PTAC Maintenance Welcome to the PTAC Preventive Maintenance
More informationWhy is my air conditioner dripping on my customers?
De-Mystifying HVAC Why is my air conditioner dripping on my customers? By Ron Prager One of the most frequent emergency service requests is a call for an air conditioner leaking water into the store. These
More informationUse & Care Guide AIR CONDITIONERS ACM052 ACM062 ACM072
Use & Care Guide X AIR CONDITIONERS ACM052 ACM062 ACM072 Contents Page Important Safety Instructions....2 Operating Your Air Conditioner....3 Starting your air conditioner......3 Changing air direction....3
More informationIntroducing an All New Line of Cleaning Chemicals
www.alltemp.ca Introducing an All New Line of Cleaning Chemicals Coil Cleaners & Brighteners Metal Cleaning Detergents Ice Machine Cleaners Scale Removers Electronic Cell Cleaner Degreasing Solvent Leak
More informationNADCA GENERAL SPECIFICATIONS FOR THE CLEANING OF COMMERCIAL HEATING, VENTILATING AND AIR CONDITIONING SYSTEMS
NADCA GENERAL SPECIFICATIONS FOR THE CLEANING OF COMMERCIAL HEATING, VENTILATING AND AIR CONDITIONING SYSTEMS National Air Duct Cleaners Association 1518 K Street, N.W. Suite 503 Washington, DC 20005 (202)
More informationSPILLS & SPILL KITS. Spills -General Guidelines:
Spills -General Guidelines: If handled properly, a spill may be nothing more than a nuisance. If handled improperly, a spill can seriously disrupt your activities and the work of your colleagues. At worst,
More informationAIR CONDITIONING EFFICIENCY F8 Energy eco-efficiency opportunities in Queensland Foundries
AIR CONDITIONING EFFICIENCY F8 Energy eco-efficiency opportunities in Queensland Foundries Hot tips and cool ideas to save energy and money! Air conditioning units or systems are often used by foundries
More informationHeat Pump USER S INFORMATION MANUAL FOR THE OPERATION AND MAINTENANCE OF YOUR NEW RESIDENTIAL HEAT PUMP
Heat Pump USER S INFORMATION MANUAL FOR THE OPERATION AND MAINTENANCE OF YOUR NEW RESIDENTIAL HEAT PUMP NOTE TO INSTALLER: THIS MANUAL MUST BE LEFT WITH THE EQUIPMENT USER. WELCOME TO EFFICIENT YEAR-ROUND
More informationTable Z. Troubleshooting Chart for Air Conditioners. Cause
Troubleshooting Chart for Air Conditioners Type of Unit Complaint Cause With open-type compressor Electric motor will not start Power failure Check circuit for power source Compressor stuck Locate cause
More informationCENTRAL HEAT PUMP AND AIR CONDITIONER INSTALLATION
Technology Fact Sheet CENTRAL HEAT PUMP AND AIR CONDITIONER INSTALLATION Buildings for the 21st Century Buildings that are more energy-efficient, comfortable, and affordable that s the goal of DOE s Office
More informationThe Embassy of the United States of America invites you to submit an offer for supply and install the following A/Cs:
RFQ number PR4877728 The Embassy of the United States of America invites you to submit an offer for supply and install the following A/Cs: A- Supplying and installing 30 high wall A/C split unit 3HP- 24,000
More informationGUIDELINES ON AIRFLOW AND REFRIGERANT CHARGE VERIFICATION AND DIAGNOSTICS
GUIDELINES ON AIRFLOW AND REFRIGERANT CHARGE VERIFICATION AND DIAGNOSTICS Alliance for Residential Building Innovation David Springer, Davis Energy Group Context Airflow and refrigerant charge defects
More informationwww.inspection-for-industry.com
Quality Control Form (TEST RUNNING RECORD FOR AIR HANDLING UNIT) SUB POWER SUPPLY: MAIN POWER V, Hz, CONTROL V, Blower 1 kw, Blower 2 kw, Compressor: (1) kw (2) kw (3) kw (4) kw Heating Element: kw 1.
More informationAir Conditioning System
Owner s Information Manual Air Conditioning ystem NOTE TO EQUIPMENT OWNER: For your convenience, please record the model and serial numbers of your new equipment in the space provided. This information,
More informationPreventive Maintenance. State Energy Assessment Workshop By: DTE Energy Partnership & Services
Preventive Maintenance State Energy Assessment Workshop By: DTE Energy Partnership & Services Do you know? World wide research has shown that one of the reasons causing 80% of the accidents is deficient
More information4AC13/14 SPLIT SYSTEM AIR CONDITIONER INSTALLATION / START-UP INSTRUCTIONS /HOMEOWNERS INFORMATION MANUAL
4AC13/14 SPLIT SYSTEM AIR CONDITIONER INSTALLATION / START-UP INSTRUCTIONS /HOMEOWNERS INFORMATION MANUAL These instructions must be read and understood completely before attempting installation. TABLE
More informationCENTRAL AIR CONDITIONER A GUIDE TO OPERATING AND MAINTAINING YOUR RESIDENTIAL AIR CONDITIONING UNIT.
CENTRAL AIR CONDITIONER A GUIDE TO OPERATING AND MAINTAINING YOUR RESIDENTIAL AIR CONDITIONING UNIT. NOTE TO INSTALLER: THIS MANUAL SHOULD BE LEFT WITH THE EQUIPMENT USER. WELCOME TO EFFICIENT HOME COOLING
More informationHEAT PUMP FREQUENTLY ASKED QUESTIONS HEAT PUMP OUTDOOR UNIT ICED-UP DURING COLD WEATHER:
HEAT PUMP FREQUENTLY ASKED QUESTIONS HEAT PUMP OUTDOOR UNIT ICED-UP DURING COLD WEATHER: It is normal for a heat pump to have a build up of white frost on the outside coil during cold damp weather. The
More informationHow To Design A Refrigeration System
AIRAH Refrigeration (in HVAC) Back to Basics For the First Time Terms of Reference What this session is NOT about Detailed Refrigeration Design Detailed analysis of various Refrigants properties Comparison
More informationTable V. Troubleshooting Checklist for Refrigeration Systems. Air or non-condensable gas in system. Inlet water warm.
Table V Troubleshooting Checklist for Refrigeration Systems TROUBLE POSSIBLE CAUSE CORRECTIVE MEASURE High condensing pressure. Low condensing pressure. Air or non-condensable gas in system. Inlet water
More informationTHE CASE FOR A REFRIGERATION PREVENTATIVE MAINTENACE PROGRAM
THE CASE FOR A REFRIGERATION PREVENTATIVE MAINTENACE PROGRAM Prepared and Presented By: Don Langston President & CEO, Aire Rite Air Conditioning & Refrigeration Inc Setting the Foundation The Refrigeration
More informationA brief explanation on how air conditioning works and what terms mean
A brief explanation on how air conditioning works and what terms mean -presented by- Before we begin, let s explain the air conditioning process. In the most basic of terms, air conditioning simply takes
More informationInstallation Instructions
CNPVU CNRVU Uncased Coils Upflow - Downflow Heating - Cooling Installation Instructions NOTE: Read the entire instruction manual before starting the installation. TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS...
More informationHow does solar air conditioning work?
How does solar air conditioning work? In a conventional air conditioning system; The working fluid arrives at the compressor as a cool, low-pressure gas. The compressor is powered by electricity to squeeze
More informationChilled Water HVAC Systems
Chilled Water HVAC Systems By Ron Prager, Brinco Mechanical Services, Inc. Types of water based systems: There are three types of HVAC systems that utilize water as a heat transfer medium. The first system,
More informationQUESTIONS TO ASK WHEN REPLACING YOUR HVAC TOGETHERWESAVE.COM
QUESTIONS TO ASK WHEN REPLACING YOUR HVAC TOGETHERWESAVE.COM TOGETHERWESAVE.COM IS IT TIME TO REPLACE YOUR HVAC SYSTEM? If your heating and cooling system is 15 to 20 years old and is experiencing problems,
More informationCENTRAL AIR CONDITIONER with PURON REFRIGERANT
USER S INFORMATION MANUAL CENTRAL AIR CONDITIONER with PURON REFRIGERANT NOTE TO INSTALLER: This manual must be left with the equipment user. WELCOME TO EFFICIENT HOME COOLING COMFORT Congratulations on
More informationB. ASTM C 533 Calcium Silicate Block and Pipe Thermal Insulation. C. ASTM C 547 Mineral Fiber Preformed Insulation
PART 1: GENERAL 1.01 Purpose: A. This standard is intended to provide useful information to the Professional Service Provider (PSP) to establish a basis of design. The responsibility of the engineer is
More informationApplying improper cleaning solutions and techniques for
Carefully Choosing Proper selection of chemicals and cleaning techniques are critical in A/C coil cleaning. BY JAMES BOWMAN Images courtesy of RectorSeal Corp. Applying improper cleaning solutions and
More informationCircuit breaker panel. Power supply for condensing unit. Power supply for furnace. Air handler (Furnace)
UNIT OBJECTIVES Describe the concept of year-round air conditioning List three typical year-round air conditioning system types List the five ways to condition the air Determine airflow for a cooling system
More informationMAXIMUM HEAT LOAD TEMPERATURE TESTING ( Differential Temperature Testing )
MAXIMUM HEAT LOAD TEMPERATURE TESTING ( Differential Temperature Testing ) The Concept Maximum Heat Load Temperature Testing is a powerful air-conditioning diagnostic and evaluation technique. It is also
More informationCustomized Assessment Blueprint
Customized Assessment Blueprint HVAC Installer Basic - Test Codes: 7906 and 7796 Measuring What Matters Competencies and Skills Tested in this Assessment: HVAC Theory Heat Theory and Refrigeration HVAC
More informationCOMMERCIAL HVAC CHILLER EQUIPMENT. Air-Cooled Chillers
COMMERCIAL HVAC CHILLER EQUIPMENT Air-Cooled Chillers Technical Development Programs (TDP) are modules of technical training on HVAC theory, system design, equipment selection and application topics. They
More informationSECTION 23 01 30.51 HVAC AIR-DISTRIBUTION SYSTEM CLEANING
SECTION 23 01 30.51 HVAC AIR-DISTRIBUTION PART 1 - GENERAL 1.1 SUMMARY A. Section includes cleaning of interior surfaces of HVAC equipment. The HVAC equipment cleaning work includes the following: 1. Air
More informationUSER S, MAINTENANCE and SERVICE INFORMATION MANUAL
CONTENTS SAFETY INFORMATION................ 2 FOR YOUR SAFETY....................... 2 SYSTEM OPERATION.................. 2 THERMOSTATS........................... 2 INTERMITTENT IGNITION DEVICE...........
More informationDehumidification Frequently Asked Questions
Dehumidification Basics Why do you want to keep indoor Rh between 30-60%? ASHRAE recommends keeping the relative humidity in a home between 30-60% to limit the effects of many unwanted conditions and harmful
More informationSECTION 23 81 03 - PACKAGED ROOFTOP AIR CONDITIONING UNITS NON-CUSTOM
SECTION 23 81 03 - PACKAGED ROOFTOP AIR CONDITIONING UNITS NON-CUSTOM PART 1 - GENERAL 1.1 SUMMARY A. Section Includes: 1. Packaged rooftop air conditioning unit (5 tons and smaller). 2. Roof curb. 1.2
More informationSERVICE GUIDELINES HCFC R22 TO HFC REFRIGERANT BLENDS
SERVICE GUIDELINES HCFC R22 TO HFC REFRIGERANT BLENDS 2009 Tecumseh Products Company. All rights reserved. Page 1 of 8 Refrigerant R22 is widely used for residential and commercial air conditioning, as
More informationHow Ground/Water Source Heat Pumps Work
How Ground/Water Source s Work Steve Kavanaugh, Professor Emeritus of Mechanical Engineering, University of Alabama Ground Source s (a.k.a. Geothermal s) are becoming more common as the costs of energy
More information3/29/2012 INTRODUCTION HVAC BASICS
INTRODUCTION HVAC BASICS AND HVAC SYSTEM EFFICIENCY IMPROVEMENT SECTION O HVAC systems or Heating, Ventilating and Air-Conditioning systems control the environment for people and equipment in our facilities.
More informationUSER S INFORMATION MANUAL
CONTENTS HOW YOUR SYSTEM WORKS......... 2 COOLING CYCLE....................... 2 HEATING CYCLE (HEAT PUMPS).......... 2 SYSTEM OPERATION................... 2 SETTING THE THERMOSTATS............ 2 THERMOSTATS.....................
More informationHeat Trace Fundamentals. Monte Vander Velde, P.E. President, Interstates Instrumentation
Heat Trace Fundamentals Monte Vander Velde, P.E. President, Interstates Instrumentation Contents Introduction... 3 Purpose of Heat Trace... 3 Types of Heat Trace... 4 Steam Trace vs. Electric Trace...
More informationAttachment J-C18.1. HVAC Work Instructions
. RFP: Attachment J-C18.1 HVAC Work Instructions NNC13ZFD017J SOW Item No. Title Page C18-02 Control Air Systems Annual PM 2 C18-03 Split System AC Indoor Section Annual PM 3 C18-04 Condensing Unit Semi-Annual
More information1. Certification: Employ an ASCS certified by NADCA on a full-time basis. 2. Supervisor Qualifications: Certified as an ASCS by NADCA.
PART 1 - GENERAL 1.01 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.
More informationDuctless Heat Pumps. Gary Nordeen January 2009. www.nwbuildings.org/dhp.aspx info@nwbuildings.org
Ductless Heat Pumps Gary Nordeen January 2009 www.nwbuildings.org/dhp.aspx info@nwbuildings.org Outline Heat Pump Basics Ductless Heat Pumps Efficiency Advantages Commercial installations Planning (applications,
More informationHeating, Ventilation, Air Conditioning and Refrigeration (HVACR)
Heating, Ventilation, Air Conditioning and Refrigeration (HVACR) I. Demonstrate safety skills in typical HVACR work situations to NATE Core Installer Knowledge Areas for Technician Excellence for Safety
More informationWARNING: FAILURE TO FOLLOW THESE RULES MAY RESULT IN SERIOUS PERSONAL INJURY CAUTION: INSTALLATION LOCATION:
Revision Level: 01 Revision Date: 07/07/2011 Please read all instructions carefully to help ensure a correct and SAFE installation of your Second Wind Ultraviolet Germicidal Air Purifier. Failure to do
More informationRefrigerant Changeover Guidelines R-22 to R-407C. Leading the Industry with Environmentally Responsible Refrigerant Solutions
Refrigerant Changeover Guidelines R-22 to R-407C Leading the Industry with Environmentally Responsible Refrigerant Solutions Copeland does not CFC advocate the wholesale changeover of HCFC HCFC refrigerants
More informationPreventive Maintenance. Learning Objectives: Howdy! Learning Objectives Cont:
Preventive Maintenance Fountain of Youth for HVAC Successful Learning Environment Bonus Strategies James D. McClure, P.E. Action Planning Guide As you listen to this presentation, use the chart in your
More informationHEAT PUMPS with Puron Refrigerant Single Speed, Two-Speed
USER S INFORMATION MANUAL HEAT PUMPS with Puron Refrigerant Single Speed, Two-Speed TWO-SPEED NOTE TO INSTALLER: This manual must be left with the equipment user. WELCOME TO EFFICIENT YEAR- ROUND COMFORT
More informationSECTION 15750 PACKAGED ROOFTOP AIR CONDITIONING UNITS
SECTION 15750 PART 1 - GENERAL 1.01 DESCRIPTION A. Section includes requirements for roof mounted, self-contained units, with electric cooling, and electric or reverse refrigeration cycle (heat pump) heating
More informationWet Bulb Temperature and Its Impact on Building Performance
Wet Bulb Temperature and Its Impact on Building Performance By: Kurmit Rockwell, PE, CEM, LEED AP and Justin Lee, PE, LEED, AP BD+C Energy Solution Services, AtSite, Inc. 1 What is Wet Bulb Temperature?
More informationPENNY IN A CUP: DEMONSTRATING THE LAW OF INERTIA
PENNY IN A CUP: DEMONSTRATING THE LAW OF INERTIA Introduction Newton s (Sir Isaac Newton, English physicist, 1642 1727) First Law of Motion states that: An object at rest tends to stay at rest, and an
More informationCODE NOTES. Insulation Requirements in Commercial Buildings for Mechanical and Service Hot-Water Piping
BUILDING TECHNOLOGIES PROGRAM Insulation Requirements in Commercial Buildings for Mechanical and Service Hot-Water Piping The intent of the pipe insulation requirements is to reduce temperature changes
More informationSunChill Power ltd RUSSELL INTERNATIONAL CONTROLS
Refrigeration Energy Technologies ltd : RUSSELL INTERNATIONAL CONTROLS 1) 2) 3) EPA/VOC 4) (Biodegradable) 5) 6) HVACR HVACR. " ".,, fan coils.. 30..! GASKET and THREAD SEALANTS NYLOG! Nylog. Nylog.. CARBONEX
More informationair conditioners how to choose a cooling system
air conditioners how to choose a cooling system taking responsibility As an individual, your efficient use of energy brings benefits such as lower bills, improved comfort levels in your home and a reduced
More informationAutomobile Air Conditioning Primer
Automobile Air Conditioning Primer An air conditioner is basically a refrigerator without the insulated box. It uses the evaporation of a refrigerant, like Freon, to provide cooling. The mechanics of the
More informationMisconception #1: You should wait as long as possible before cleaning your carpet.
Hi! My name is Whitney. I'm grateful for the opportunity to provide you with information about carpet cleaning and help you choose a carpet cleaning company. I am certified by the I.I.C.R.C. in several
More informationA Guideline for Cleaning Up After Flood or Sewer Back-up
A Guideline for Cleaning Up After Flood or Sewer Back-up Revised 2010-03 INDEX PAGE Index 2 Personal Protection 3 Procedure for Cleaning Up 3 Safety 4 Initial Clean-up 5 Clean-up and Disinfection 5 Disinfectants
More informationMINNESOTA WEST COMMUNITY & TECHNICAL COLLEGE COURSE OUTLINE
MINNESOTA WEST COMMUNITY & TECHNICAL COLLEGE COURSE OUTLINE Faculty are required to have the outline submitted to the Academic Affairs Office. The course outline is the form used for approval of new courses
More informationHVAC Systems: Overview
HVAC Systems: Overview Michael J. Brandemuehl, Ph.D, P.E. University of Colorado Boulder, CO, USA Overview System Description Secondary HVAC Systems Air distribution Room diffusers and air terminals Duct
More informationGet the FACTS about SEER and Deliver Better Customer Value
What is SEER? SEER stands for Seasonal Energy Efficiency Ratio. It s a number that describes how well air-conditioning equipment works. A higher SEER means better efficiency and lower energy bills. SEER
More informationRULE 1102. DRY CLEANERS USING SOLVENT OTHER THAN PERCHLOROETHYLENE
(Adopted January 6, 1978)(Amended August 3, 1979)(Amended July 11, 1980) (Amended August 3, 1990)(Amended December 7, 1990) (Amended November 17, 2000) RULE 1102. DRY CLEANERS USING SOLVENT OTHER THAN
More informationSWIMMING POOL HEAT PUMP
SWIMMING POOL HEAT PUMP Installation & User Manual Model HP40B HP50B HP65B Hayward Pool Products Canada, Inc. T: 1-888-238-7665 www.haywardpool.ca CONTENT I. Application 4 II. Features 4 III. Technical
More information543-0032-00, 943-0032-00. User s Manual
543-0032-00, 943-0032-00 User s Manual 1 Comfort Alert Diagnostics Faster Service And Improved Accuracy The Comfort Alert diagnostics module is a breakthrough innovation for troubleshooting heat pump and
More informationPortable Air Conditioner. OWNER S MANUAL Read these instructions before use. Model: MF08CESWW. Voltage rating: 115V~60Hz Power rating : 800W
MODE ALARM Portable Air Conditioner OWNER S MANUAL Read these instructions before use 8 Model: MF08CESWW Voltage rating: 115V~60Hz Power rating : 800W Customer Support : 1-800-474-2147 For product inquiries
More informationThe Blakeslee Checklist of Air Conditioning Maintenance Tips. Get in your COMFORT ZONE
The Blakeslee Checklist of Air Conditioning Maintenance Tips Get in your COMFORT ZONE Michigan is cold, but then Michigan gets hot! At Blakeslee & Son, Inc. we ve spent more than 60 years helping our customers
More informationHVAC Efficiency Definitions
HVAC Efficiency Definitions Term page EER - 2 SEER - 3 COP - 4 HSPF - 5 IPLV - 6 John Mix May 2006 Carrier Corporation 1 Energy Efficiency Ratio (EER) The energy efficiency ratio is used to evaluate the
More informationCEILING CASSETTE FAN COIL UNIT
CEILING CASSETTE FAN COIL UNIT Operation and Installation Manual MHCFC4W-04, 08, 12, 16 Four way ceiling cassette fan coil unit Please read this manual before using the fan coil unit. Installation and
More informationICE AIR. Console Water Source Heat Pump (WSHP) OPERATING & MAINTENANCE MANUAL. Wo r l d C l a s s C o m f o r t. www.ice-air.com
80 Hartford Avenue Mount Vernon New York 10553 Tel: 914-668-4700 EXT. 203 Fax: 914-668-5643 www.ice-air.com Wo r l d C l a s s C o m f o r t Console Water Source Heat Pump (WSHP) OPERATING & MAINTENANCE
More informationSupport Cleaning Apparatus. Operation, Cleaning, & Safety Manual
Support Cleaning Apparatus Operation, Cleaning, & Safety Manual Revision 1.1 31 May 2014 WARNING: The instructions and precautionary statements contained herein are intended for the Support Cleaning Apparatus
More informationON-VEHICLE INSPECTION
Sight Glass I11244 ONVEHICLE INSPECTION 1. INSPECT REFRIGERANT VOLUME Observe the sight glass on the liquid tube. AC3 AC22F05 Test conditions: Running engine at 1,500 rpm Blower speed control switch: HI
More informationEvaluate, Clean, and Tune Guidance
Evaluate, Clean, and Tune Guidance The Evaluate, Clean and Tune (ECT) process serves three essential purposes in the Weatherization Assistance Program (WAP). The first is to evaluate the existing system
More informationCOMPETENCY ANALYSIS PROFILE Refrigeration and Air Conditioning Systems Mechanic - Branch 1 313A
COMPETENCY ANALYSIS PROFILE Refrigeration and Air Conditioning Systems Mechanic - Branch 1 313A (All unshaded skill sets must be demonstrated/completed) PROTECT SELF AND OTHERS Identify, interpret, and
More informationA discussion of condensate removal systems for clarifier and thickener drives for water and wastewater facilities.
A discussion of condensate removal systems for clarifier and thickener drives for water and wastewater facilities. Richard L. Dornfeld, BSME, P.E. Staff Engineer September 25, 2014 Moisture can be a problem
More informationSECTION 23 81 43 HEAT PUMPS
SECTION 23 81 43 HEAT PUMPS PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Packaged rooftop heat pumps. 1.2 REFERENCES A. American Society of Heating, Refrigerating and Air-Conditioning Engineers:
More information