Mitsubishi Electric Lossnay series Technical Manual
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Mitsubishi Electric Lossnay series Technical Manual

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TECHNICAL MANUAL FOR NORTH AMERICA
Models
Lossnay Unit
LGH-F300RX
LGH-F470RX
5
LGH-F600RX
LGH-F1200RX
Lossnay Remote Controller
PZ-60DR-E
PZ-41SLB-E
PZ-52SF-E
June.2012
-E
5
-E
-E
5
-E
5
Table of Contents
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Summary of Contents for Mitsubishi Electric Lossnay series

  • Page 1 June.2012 TECHNICAL MANUAL FOR NORTH AMERICA Models Lossnay Unit LGH-F300RX LGH-F470RX LGH-F600RX LGH-F1200RX Lossnay Remote Controller PZ-60DR-E PZ-41SLB-E PZ-52SF-E...
  • Page 2 Y11-001 Jun.2012 ...

  • Page 3: Table Of Contents

    CONTENTS Lossnay Unit CHAPTER 1 Ventilation for Healthy Living Necessity of Ventilation ............................ Ventilation Standards ............................Ventilation Method ............................Ventilation Performance ............................ Ventilation Load ..............................CHAPTER 2 Lossnay Construction and Technology Construction and Features ..........................U-16 Lossnay Core Construction and Technology ..................... U-16 Total Energy Recovery Efficiency Calculation ....................
  • Page 4 CHAPTER 6 Examples of Lossnay Applications Large Office Building ............................U-60 Small-Scale Urban Building ..........................U-64 Hospitals ................................U-65 Schools ................................U-67 Convention Halls, Wedding Halls in Hotels ....................... U-68 Public Halls (Facilities such as Day-care Centers) ..................... U-69 CHAPTER 7 Installation Considerations Series) ..............
  • Page 5 5.11 When using the remote/local switching and the ON/OFF input (level signal) ..........C-29 5.12 When connecting to the City Multi, Lossnay remote controller (PZ-52SF-E) or Mitsubishi Electric Air-Conditioner Network System (MELANS) ..C-30 6. Precautions When Designing M-NET Systems M-NET Transmission Cable Power Supply .....................
  • Page 6 9. Automatic Ventilation Switching Effect of Automatic Ventilation Mode ......................C-40 Ventilation mode control ..........................C-40 10. Troubleshooting 10.1 Service Flow ..............................C-44 10.2 Checklist ................................. C-45 11. Installation method 11.1 Electrical installation ............................C-64 11.2 Connecting the power supply cable ........................ C-66 11.3 System configuration ............................
  • Page 8 Lossnay Unit...

  • Page 10: Chapter 1 Ventilation For Healthy Living

    CHAPTER 1 Ventilation for Healthy Living...

  • Page 11: Necessity Of Ventilation

    • CHAPTER 1 Ventilation for Healthy Living Ventilation air must be introduced constantly at a set ratio in an air-conditioning system. The ventilation air introduced is to be mixed with the return air to adjust the temperature and humidity, supply oxygen, reduce odors, remove tobacco smoke, and to increase the air cleanliness.
  • Page 12 • CHAPTER 1 Ventilation for Healthy Living In Japan, an Instruction Guideline based on these regulations has been issued, and unified guidance is followed. Part of the Instruction Guideline regarding ventilation is shown below. • The ventilation air intake must be 33ft (10m) or higher from ground level, and be located at an appropriate distance from the exhaust air outlet.

  • Page 13: Ventilation Standards

    • CHAPTER 1 Ventilation for Healthy Living Effect of Carbon Dioxide (CO Concentration (%) Effect of Concentration Changes 0.03 (0.04) Standard atmosphere. 0.04 - 0.06 City air. 0.07 Tolerable concentration when many occupants stay in the space for long time. There is no toxic level in alone.

  • Page 14: Ventilation Method

    • CHAPTER 1 Ventilation for Healthy Living 3. Ventilation Method 3.1 Comparing of Ventilation Methods There are two main types of ventilation methods. Centralized Ventilation Method Mainly used in large buildings, with the ventilation air intake being installed in one machine room. For this method, primary treatment of the ventilation air, such as energy recovery to the intake air and dust removal, is performed via distribution to the building by ducts.
  • Page 15 • CHAPTER 1 Ventilation for Healthy Living Comparing Centralized Ventilation and Independent Zoned Ventilation Methods Centralized Ventilation Method Independent Zoned Ventilation Method The air transfer distance is long, thus requiring As the air transfer distance is short, the fan power is Fan Power much fan power.

  • Page 16: Ventilation Performance

    • CHAPTER 1 Ventilation for Healthy Living 4. Ventilation Performance The ventilation performance is largely affected by the installation conditions. Optimum performance may not be achieved unless the model and usage methods are selected according to the conditions. Generally, the ventilation performance is expressed by “air volume” and “wind pressure (static pressure)” . 4.1 Air Volume Air volume equals the volume of air exhausted (or supplied) by the unit in a given period, and is expressed in CFM or m /hr (hour).
  • Page 17 Ventilation for Healthy Living 4.3 Measuring the Air Volume and Static Pressure Mitsubishi Electric measures the Lossnay’s air volume and static pressure with a device as shown below according to Japan Industrial Standards (JIS B 8628). Measuring Device Using Orifice (JIS B 8628 Standards)
  • Page 18 • CHAPTER 1 Ventilation for Healthy Living 5. Outdoor Air (ventilation) Load 5.1 How to Calculate Each Approximate Load 5.1 A (US unit) The ventilation air load can be calculated with the following formula if the required ventilation intake volume “Q CFM” is known: (Ventilation air load) = γ...
  • Page 19 • CHAPTER 1 Ventilation for Healthy Living 5.1 B (SI unit) The ventilation air load can be calculated with the following formula if the required ventilation intake volume “Q m /h” is known: (Ventilation air load) = γ · Q ·...

  • Page 20: Ventilation Load

    • CHAPTER 1 Ventilation for Healthy Living See below for Calculation examples of determining ventilation load during both cooling and heating. 5.2 Ventilation Load During Cooling (In an Office Building) • Cooling Load Classifications Office Building Department Store, Shop Heat generated from walls (q from direct sunlight (q Indoor penetration heat Heat generated from glass...
  • Page 21 • CHAPTER 1 Ventilation for Healthy Living • Determining Internal Heat Gain When classifying loads, the internal heat gain (indoor generated heat + indoor penetration heat) is the ventilation air load subtracted from the approximate cooling load when it is assumed that there is no reheating load. (Internal heat gain) = 14.6 W/ft (157.0 W/m...
  • Page 22 • CHAPTER 1 Ventilation for Healthy Living 5.3 Ventilation Load During Heating • Classification of Heating Load Class Heat Load Heat escaping from walls (q Indoor heat Heat escaping from glass (q loss Heat loss from conduction and convection (q Accumulated heat load in walls (q Ventilation Sensible heat (q...

  • Page 24: Chapter 2 Lossnay Construction And Technology

    CHAPTER 2 Lossnay Construction and Technology...

  • Page 25: Construction And Features

    • CHAPTER 2 Lossnay Construction and Technology 1. Construction and Features • Construction Lossnay Core Lossnay is constructed so that the exhaust air passage from the SA (Supply air diffuser) EA (Exhaust air) indoor side to the outdoor side (RA → EA) and the ventilation air passage from the outdoor side to the indoor side (OA →...
  • Page 26 • CHAPTER 2 Lossnay Construction and Technology • Total Energy Recovery Mechanism Sensible Heat and Latent Heat The heat that enters and leaves in accordance with rising or falling temperatures is called sensible heat. The direct movement of water vapor molecules or due to the changes in the matter’s physical properties (evaporation, condensation) is called latent heat. (1) Temperature (Sensible Heat) Recovery 1) Heat conduction and heat passage is performed through a partition plate from the high temperature to low temperature...

  • Page 27: Total Energy Recovery Efficiency Calculation

    • CHAPTER 2 Lossnay Construction and Technology 3. Total Energy Recovery Efficiency Calculation The Lossnay Core’s energy recovery efficiency can be considered using the following three transfer rates: Indoors Outdoors Exhaust air Fresh air exhaust (Stale air) (1) Temperature (sensible heat) recovery efficiency (Fresh heating/cooling air) (2) Humidity (latent heat) recovery efficiency (3) Enthalpy (total heat) recovery efficiency...

  • Page 28: What Is A Psychrometric Chart

    • CHAPTER 2 Lossnay Construction and Technology 4. What is a Psychrometric Chart? A chart that shows the properties of humid air is called a psychrometric chart. The psychrometric chart can be used to find the (1) Dry bulb temperature, (2) Wet bulb temperature, (3) Absolute humidity, (4) Relative humidity, (5) Dew point and (6) Enthalpy (total heat) of a certain air condition.

  • Page 29: Lossnay Energy Recovery Calculation

    • CHAPTER 2 Lossnay Construction and Technology 5. Lossnay Energy Recovery Calculation The following diagram shows the various air conditions when ventilation air is introduced through the Lossnay Core. If a conventional sensible energy recovery unit is used alone and is assumed to have the same energy recovery efficiency as Lossnay, the condition of the air supplied to the room is expressed by Point A in the figure.

  • Page 30: Chapter 3 General Technical Considerations

    CHAPTER 3 General Technical Considerations...

  • Page 31: Lossnay Energy Recovery Effect

    • CHAPTER 3 General Technical Considerations 1. Lossnay Energy Recovery Effect 1.1 Comparing Ventilation Load of Various Ventilators Examples of formulas that compare the energy recovered and ventilation load when ventilating with the Lossnay (total energy recovery unit), a sensible energy recovery ventilation unit (sensible HRV), and a conventional ventilator unit are shown below. (1) Cooling During Summer Conditions •...
  • Page 32 • CHAPTER 3 General Technical Considerations (2) Heating During Winter Conditions: • • Model LGH-F600RX Energy recovery efficiency table (%) (at 60Hz, high speed) (For winter) • Ventilation rate: 600 CFM Lossnay Sensible HRV Conventional (Specific gravity of air ρ = 0.0749 Ib/ft Unit Unit Ventilator Unit...

  • Page 33: Calculating Lossnay Cost Savings

    • CHAPTER 3 General Technical Considerations 2. Calculating Lossnay Cost Savings Use the following pages to assess the economical benefits of using the Lossnay in particular applications. (1) Conditions • Return air volume (RA) CFM (m /hr) • Outdoor air volume (OA) = CFM (m /hr) •...
  • Page 34 • CHAPTER 3 General Technical Considerations (4) Ventilation Load and Energy Recovery Heating Cooling Air specific gravity × ventilation volume Air specific gravity × ventilation volume Ventilation load without × (indoor enthalpy – outdoor air enthalpy) × (outdoor air enthalpy – indoor enthalpy) Lossnay (q Ventilation load (q Ventilation load (q...

  • Page 35: Psychrometric Chart

    • CHAPTER 3 General Technical Considerations 3. Psychrometric Chart AEX-120-99—page 2 3.1 U-26...
  • Page 36 • CHAPTER 3 General Technical Considerations 3.2 U-27...

  • Page 37: Determining Lossnay Core Resistance To Bacterial Cross-Contamination And Molds

    (1) Object To verify that there is no bacterial cross-contamination from the outlet air to the inlet air of the Lossnay Core. (2) Client MITSUBISHI ELECTRIC CO. NAKATSUGAWA WORKS. (3) Test Period April 26, 1999 - May 28, 1999 (4) Test Method The test bacteria suspension is sprayed in the outlet duct at a pressure of 1.5 kg/cm...
  • Page 38 • CHAPTER 3 General Technical Considerations Bacillus Subtilis Table 1 Test Results with (CFU/30L air) 5.4 × 10 5.6 × 10 < 10 < 10 8.5 × 10 7.5 × 10 < 10 < 10 7.5 × 10 < 10 <...

  • Page 39: Lossnay Core Fire : Retardant Property

    • CHAPTER 3 General Technical Considerations 5. Lossnay Core Fire : retardant property The Lossnay Core was also tested at General Building Research Corporation of Japan according to the fire retardancy test methods of thin materials for construction as set forth by JIS A 1322. The material was evaluated as a Class 2 flame retardant.

  • Page 40: Lossnay Core Sound Reducing Properties Test

    Test method was determined according to JIS A 1416 : 1994 Test number IVA-01-06 "Method for laboratory measurement of sound transmission loss" and Architectural Institute of Japan Standard Mitsubishi Electric Corporation Name "Measurement method on sound transmission loss of small 1-3, Komaba-cho, Nakatsugawa-shi, building elements".

  • Page 41: Changes In The Lossnay Core

    • CHAPTER 3 General Technical Considerations 7. Changes in the Lossnay Core An example of a building with Lossnay units installed, that has been used as a case study to assess the changes in the units. 7.1 Building Where Lossnay is Installed (1) Building : Meiji Seimei, Nagoya Office/shop building 1-1 Shinsakae-machi Naka-ku, Nagoya...
  • Page 42 • CHAPTER 3 General Technical Considerations 7.3 Lossnay Operation (1) Unit Operation Began : September 1972 Daily Operation Began : 7:00 Average daily operation: 11 hours Daily Operation Stops : 18:00 (2) Inspection Date : November 1983 (3) Months When Units are in Bypass Operation : Three months of April, May, June (4) Total Operation Time : (134 –...

  • Page 43: Comparing Energy Recovery Techniques

    • CHAPTER 3 General Technical Considerations 8. Comparing Energy Recovery Techniques Basic Methods of Total Energy Exchangers Country of Type Method Air flow development Static Conductive Cross-flow Japan Energy recovery (Mitsubishi Lossnay) transmission type principle Rotary type Heat accumulation/ Counterflow Sweden humidity accumulation type...
  • Page 44 • CHAPTER 3 General Technical Considerations 8.2 Comparing Static-type and Rotary-type Energy Recovery Units Specification. Static-type Rotary-type Conductive transmission-type: cross-flow Heat accumulation/humidity accumulation- Static-type transmission total energy recovery unit with type: counterflow orthogonally layered honeycomb-shaped treated plates The rotor core has honeycomb-shaped kraft paper, formed into multiple layers.

  • Page 46: Chapter 4 Characteristics

    • CHAPTER 4 Characteristics CHAPTER 4 Characteristics U-37...

  • Page 47: How To Read The Characteristic Curves

    • CHAPTER 4 Characteristics 1. How to Read the Characteristic Curves 1.1 Obtaining Characteristics from Static Pressure Loss (1) Static pressure loss from a straight pipe duct length (at required air volume) (2) Static pressure loss at a curved section (at required air volume) (3) Static pressure loss of related parts (at required air volume) Total static pressure loss Estimated static pressure loss curve...
  • Page 48 • CHAPTER 4 Characteristics Reference Reference Pressure loss caused Pressure loss caused by outdoor air wind velocity (inH by outdoor air wind velocity (Pa) = 0.003019 × r × V × V × (velocity) Air weight 0.0749 Ib/ft Velocity (ft/s) Air weight 1.2 kg/m 2 4 6 8 101214 16 18 10 20 30 40 50 60...
  • Page 49 • CHAPTER 4 Characteristics 2.2 Calculating of Duct Pressure Loss (1) How to Calculate Curved Sections in Ductwork Table 6. Pressure Losses in Each Duct Area Length of Length of Duct Duct Equivalent Equivalent Outline Diagram Conditions Outline Diagram Conditions Area Value Area...

  • Page 50: How To Obtain Efficiency From Characteristic Curves

    • CHAPTER 4 Characteristics 3. How to Obtain Efficiency from Characteristic Curves How to Read Characteristic Curve Recovery Static pressure efficiency outside unit Recovery efficiency Enthalpy recovery efficiency (heating) Enthalpy recovery efficiency (cooling) Total static pressure loss (or total straight pipe equivalent length) Static pressure loss related parts (straight pipe equivalent length total) Static pressure outside unit...

  • Page 51: Sound

    • CHAPTER 4 Characteristics 4. Sound Sound is vibration transmitted through an object. The object that vibrates is called the sound source, and energy that is generated at the source is transmitted through the air to the human ear at certain frequencies. 4.1 Sound Levels and Auditory Perception Sound level is the sound wave energy that passes through a unit ISO Audio Perception Curve...
  • Page 52 • CHAPTER 4 Characteristics 4.3 Sound Frequency Analysis The human ear detects sound differently according to the frequency; however, the sound generated from vibrations is not limited to one frequency, but instead, various frequencies are generated at different levels. NC curve will show how the various frequencies are generated at different levels, which is determined according to the difficulty of detecting conversations.
  • Page 53 • CHAPTER 4 Characteristics * Approximate values of sound levels using practical examples The following diagram shows typical everyday sounds. Approximate degree of sound levels can be seen. * Sound levels and perception (dB) Boiler making Painful to ears Forging, riveting, Near a airplane engine drilling Slight pain to ears...
  • Page 54 • CHAPTER 4 Characteristics 4.4 Indoor Sounds (1) Indoor Sounds Principles 1) Power Levels The Power level of the sound source (PWL) must be Fig. 1. understood when considering the effects of sound. See formula below to obtain PWL from the measured sound Unit pressure data in an anechoic chamber.
  • Page 55 • CHAPTER 4 Characteristics • Transmission Loss in Ceiling Material (dB) Example For the supply air diffuser (and return grille) in Fig. 2, PWL must be corrected for the sound transmission loss from the Material Plaster Board Plaster Board Lauan Plywood duct work (TL) such that: ( ) indicates 1/4 inch...
  • Page 56 • CHAPTER 4 Characteristics 2) When supply air diffuser (and return grille) is the source of the sound Part 1 Fig. 6 Sound from Supply Air Diffuser (A) If the main unit is separated from the supply air diffuser (and return grille) as shown in Fig. 6, installing an a) silencer box, b) silence duct or c) silence grille is recommended.

  • Page 57: Nc Curves

    • CHAPTER 4 Characteristics 5. NC Curves LGH-F300RX Background noise : 25 dB or less (A range) Background noise : 25 dB or less (A range) Measurement site : Anechoic chamber Measurement site : Anechoic chamber Operation conditions : Lossnay ventilation Operation conditions : Lossnay ventilation Power supply : 208 V 60 Hz...
  • Page 58 • CHAPTER 4 Characteristics LGH-F1200RX Background noise : 25 dB or less (A range) Background noise : 25 dB or less (A range) Measurement site : Anechoic chamber Measurement site : Anechoic chamber Operation conditions : Lossnay ventilation Operation conditions : Lossnay ventilation Power supply : 208 V 60 Hz Power supply...

  • Page 60: Chapter 5 System Design Recommendations

    CHAPTER 5 System Design Recommendations...

  • Page 61: Lossnay Operating Environment

    • CHAPTER 5 System Design Recommendations 1. Lossnay Unit Operating Environment Main Unit Installation Conditions OA ( Outdoor Air ) conditions RA ( Return Air ) conditions 14°F to 104°F 5°F to 104°F 14°F to 104°F Commercial use -10°C to 40°C -15°C to 40°C -10°C to 40°C Lossnay...

  • Page 62: Sound Levels Of Lossnay Units With Built-In Fans

    • CHAPTER 5 System Design Recommendations 2. Sound Levels of Lossnay Units with Built-in Fans The sound levels specified for Lossnay units are generated from tests conducted in an anechoic chamber. The sound levels may increase by 8 to 11 dB according to the installation construction material and room contents. When using Lossnay units in a quiet room, it is recommended silencer duct, silencer intake/exhaust grill or silencer box be installed.

  • Page 63: Solubility Of Odors And Toxic Gases, Etc., In Water And The Effect On The Lossnay Core

    • CHAPTER 5 System Design Recommendations 8. Solubility of Odors and Toxic Gases, etc., in Water and the Effect on the Lossnay Core Solubility in Water Main Max. Molecular Hazardous Useability US unit SI unit Generation Workplace Formula Type level of Lossnay Site Concentration...

  • Page 64: Automatic Ventilation Switching

    • CHAPTER 5 System Design Recommendations 9. Automatic Ventilation Switching (Refer to technical manual (Control) page C-40) Effect of Automatic Ventilation Mode The automatic damper mode automatically provides the correct ventilation for the conditions in the room. It eliminates the need for manual switch operations when setting the Lossnay ventilator to “bypass”...

  • Page 65: Alternate Installation For Lossnay

    • CHAPTER 5 System Design Recommendations 10. Alternate Installation for Lossnay 10.1 Top/bottom Reverse Installation All LGH-RX models can be installed in top/bottom reverse. Bottom Bottom 10.2 Vertical and Slanted Installation All LGH-RX models should not be used in both vertical and slanted installation to avoid any problems (motor noise, water incoming etc).

  • Page 66: Installing Supplementary Fan Devices

    • CHAPTER 5 System Design Recommendations 11. Installing Supplementary Fan Devices On occasions it may be necessary to install additional fans in the ductwork following LGH-type Lossnay units because of the addition of extra components such as control dampers, high-efficiency filters, sound attenuators, etc. which create a significant extra static pressure to the airflow.

  • Page 68: Chapter 6 Examples Of Lossnay Applications

    CHAPTER 6 Examples of Lossnay Applications...

  • Page 69: Large Office Building

    • CHAPTER 6 Examples of Lossnay Applications This chapter proposes Lossnay ventilation systems for eight types of applications. These systems were planned for use in Japan, and actual systems will differ according to each country - the ventilation systems listed here should be used only as reference.
  • Page 70 • CHAPTER 6 Examples of Lossnay Applications (2) Ventilation • For general offices, a ceiling embedded-type Lossnay unit would be installed. The inside of the ceiling would be used as a return chamber for exhaust, and the air from the Lossnay unit would be supplied to the air-conditioning return duct and mixed with the air in the air conditioning passage.
  • Page 71 • CHAPTER 6 Examples of Lossnay Applications • A gallery for the exhaust air outlets would be constructed on the outside wall to allow for blending in with the exterior. Reference floor indoor units of air conditioner system layout = Lossnay Air-cooling heat pump air conditioner Air-cooling heat pump air conditioner Additional room...
  • Page 72 • CHAPTER 6 Examples of Lossnay Applications (3) Humidification If the load fluctuation of the required humidification amount was proportional to the ventilation volume, it was ideal to add a humidifier with the ventilation system. For this application, the humidifier was installed on with the air supply side of the Lossnay unit.

  • Page 73: Small-Scale Urban Building

    • CHAPTER 6 Examples of Lossnay Applications 2. Small-Scale Urban Building 2.1 System Design Challenges The system was designed effectively using limited available air conditioner and ventilator installation space. For this application, air flow must be considered for the entire floor and the ventilator was installed in the ceiling plenum. System Design •...

  • Page 74: Hospitals

    • CHAPTER 6 Examples of Lossnay Applications 2.4 Outcome (1) Appropriate ventilation was possible with forced simultaneous air intake/exhaust using Lossnay units. (2) Outdoor air to the toilet and kitchenette was possible with Lossnay units, and appropriate ventilation was possible even in highly sealed buildings.
  • Page 75 • CHAPTER 6 Examples of Lossnay Applications 3.3 Details GF Layout (1) Air Conditioning • Centralized heat-source control using a fan coil for the Medicine general system allowed efficient operation timer control and supply storage energy conservation. • Machine Gastro A 24-hour system using a package air conditioner for room X-ray...

  • Page 76: Schools

    • CHAPTER 6 Examples of Lossnay Applications 4. Schools 4.1 System Design Challenges A comfortable classroom environment was necessary to improve the students’ desires to study. Schools near airports, railroads and highways had sealed structures to soundproof the building, and thus air conditioning and ventilation facilities were required.

  • Page 77: Convention Halls, Wedding Halls In Hotels

    • CHAPTER 6 Examples of Lossnay Applications 5. Convention Halls, Wedding Halls in Hotels 5.1 System Design Challenges Hotels often included conference, wedding, and banquet halls. Air conditioning systems in these spaces had to have a ventilation treatment system that could handle extremely large fluctuations in loads, any generated tobacco smoke, and odor removal.

  • Page 78: Public Halls (Facilities Such As Day-Care Centers

    • CHAPTER 6 Examples of Lossnay Applications 6. Public Halls (Facilities Such as Day-care Centers) 6.1 System Design Challenges For buildings located near airports and military bases, etc., that required soundproofing, air conditioning and ventilation facilities had conventionally been of the centralized type. However, independent dispersed air conditioning and ventilation systems had been necessary due to the need for zone control, as well as for energy conservation purposes.

  • Page 80: Chapter 7 Installation Considerations

    CHAPTER 7 Installation Considerations...

  • Page 81: Lgh-Series Lossnay Ceiling Embedded-Type (Lgh-Rx Series

    • CHAPTER 7 Installation Considerations 1. LGH-Series Lossnay Ceiling Embedded-Type (LGH-RX Series) LGH- F300 · F470 · F600RX Installation diagram • Always leave inspection holes ( 18 or 24) on the air filter and Lossnay Core removal side. • Always insulate the two ducts outside the room (intake Exhaust air grille Suspension bolt position air and exhaust air ducts) to prevent condensation.
  • Page 82 • CHAPTER 7 Installation Considerations 1.1 Choosing the Duct Attachment Choose between two directions for the outside duct (OA, EA) piping direction for alternative installation. Standard Installation Alternative Installation It is possible To avoid obstructing *A space is to set the unit the supply and necessary to close to a...

  • Page 84: Chapter 8 Filters

    CHAPTER 8 Filters...

  • Page 85: Importance Of Filters

    • CHAPTER 8 Filters 1. Importance of Filters Clean air is necessary for comfort and health. Besides atmospheric pollution that has been generated with the development of modern industries, the increased use of automobiles, air pollution in air-tight room has progressed to the point where it has an adverse effect on occupants.

  • Page 86: Calculation Table For Dust Collection Efficiency For Each Lossnay Filter

    • CHAPTER 8 Filters 3. Calculation Table for Dust Collection Efficiency of Each Lossnay Filter Measurement ASHRAE method Gravitational Colorimetric Applicable method method Tested Application model dust Compound Atomspheric Filter type dust dust Commercial Lossnay Pre-filter NP/400 8% - 12% Protection of heat recovery element (LGH) 3.1 Pressure Loss...

  • Page 87: Comparing Dust Collection Efficiency Measurement Methods

    • CHAPTER 8 Filters 4. Comparing Dust Collection Efficiency Measurement Methods The gravitational, colorimetric, and counting methods used for measuring dust collection efficiency each have different features and must be used according to filter application. Inward Flow Dust Outward Flow Dust Efficiency Type of Applicable Test Method...
  • Page 88 • CHAPTER 8 Filters Gravitational Method This method is used for air filters that remove coarse dust (0.39 mil (10 µm) or more). The measurement method is determined by the gravitational ratio of the dust amount on the in-flow and out-flow sides. In-flow side dust amount –...

  • Page 89: Calculating Dust Concentration Levels

    • CHAPTER 8 Filters 5. Calculating Dust Concentration Levels An air conditioning system using Lossnay units is shown below. Dust concentration levels can be easily determined using this diagram. Dust Concentration Study Diagram High-efficiency filter ηo Indoor unit of air conditioner Lossnay unit Indoor unit filter ηi η...

  • Page 90: Chapter 9 Service Life And Maintenance

    CHAPTER 9 Service Life and Maintenance...

  • Page 91: Service Life

    • CHAPTER 9 Service Life and Maintenance 1. Service Life The Lossnay Core has no moving parts, which eliminates vibration problems and permits greater installation flexibility. In addition, chemicals are not used in the energy recovery system. Performance characteristics remain constant throughout the period of service.
  • Page 92 • CHAPTER 9 Service Life and Maintenance 2.2 Cleaning the parts 1) Air filters Vacuum cleaner Use a vacuum cleaner to remove light dust. To remove stubborn dirt wash in a mild solution of detergent and lukewarm water. (under 104 F (40 C)) Air filter CAUTION Never wash the filters in very hot water and never wash them...

  • Page 94: Ventilation Standards In Each Country

    CHAPTER 10 Ventilation Standards in Each Country...

  • Page 95: Summary

    • CHAPTER 10 Ventilation Standards in Each Country 1. Ventilation Standards in Each Country 1.1 Japan Summary of Laws Related to Ventilation Item Acceptable Range Room Environment Standard Values Remarks Related Laws If a central air quality management system or mechanical Applicable buildings are ventilation equipment is installed, comply with the standard those designed to serve a...

  • Page 96: United States Of America

    • CHAPTER 10 Ventilation Standards in Each Country 2. United States of America ASHRAE Standard 62 - 2010 Table 6-1 Minimum ventilation rate in breathing zone Default Values People Outdoor Area Outdoor Occupant Air Rate Air Rate Combined Outdoor Air Occupancy Density Notes...
  • Page 97 • CHAPTER 10 Ventilation Standards in Each Country Default Values People Outdoor Area Outdoor Occupant Air Rate Air Rate Combined Outdoor Air Occupancy Density Notes Rate (see Note 5) Category (see Note 4) Class #/1000 ft cfm/person L/s·person cfm/ft L/s∙m cfm/person L/s·person or #/100 m...

  • Page 98: United Kingdom

    • CHAPTER 10 Ventilation Standards in Each Country 3. United Kingdom CIBSE Outdoor air Application Recommended Minimum Smoking Per person Per person Per m Factories 8 l/s /person 5 l/s /person 0.8 l/s / m None Offices (open plan) 8 l/s /person 5 l/s /person 1.3 l/s / m Some...

  • Page 100: Chapter 11 Lossnay Q And A

    CHAPTER 11 Lossnay Q and A...
  • Page 101 • CHAPTER 11 Lossnay Q and A Question Answer Remarks Depending on Lossnay plate is used for The core will last an adequate amount of time unless it is intentionally conditions, the core the material, but does it damaged, placed in water or in direct sunlight (ultra-violet rays). material can be stored have an adequate life span? The life is longer than metal as it does not rust.
  • Page 102 • CHAPTER 11 Lossnay Q and A Question Answer Remarks There are also Between 55 to 60% of the heat energy that escapes with ventilation is “savings in recovered by Lossnay unit, so the cooling/heating cost can be reduced by maintenance costs”...
  • Page 103 • CHAPTER 11 Lossnay Q and A Question Answer Remarks According to the results from a test performed by the Tokyo University Hospital (Inspection Center, Prof. Kihachiro Shimizu), as the supply air and exhaust air pass through different passages, bacteria transmission from Can Lossnay units be used exhaust side to supply side is low.
  • Page 104 • CHAPTER 11 Lossnay Q and A Question Answer Remarks Ample filtering will not Tobacco smoke tends to adhere to dust, and when it passes through the be possible with a net Lossnay Core, most of the nicotine and tar will be filtered by the air filter. Will tobacco and tar affect air filter.
  • Page 105 • CHAPTER 11 Lossnay Q and A Question Answer Remarks Is total operation possible Several units can be operated with the optional control switch. via the switches? Refer to “Chapter 3, Section 8 Comparing Energy Recovery Techniques.” What is the difference between the rotary-type and static-type? For the ceiling-embedded-type, the unit is installed in the false ceiling, so an...

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