Panasonic S-36PU1E5 Technical Data & Service Manual

Also see for S-100PF1E5: Operating instructions Operating instructions Technical data & service manual Technical data & service manual Operating instructions

Contents

Panasonic S-36PU1E5 Technical Data & Service Manual Manual pdf 170 page image

11-1641-9. Intaking Fresh Air of 4 Way cassette TypePrecautions Regarding External Air Intake(1) Ventilation LoadEnsure that the design of the air-conditioner takes air-conditioning loads into consideration when external airintake is involved.(2) Restrictions on External Air IntakeEnsure that the design conforms to the restrictions on air intake volume stipulated in accordance with the modelof the indoor unit and the intake method. Consideration must also be taken to mixed air content listed in (3)below without fail.* If the air intake volume does not satisfy the required ventilation volume, air must be fed into the roomseparately with the use of a total heat exchanger or a fresh air processing air-conditioner, etc.(3) Mixed AirThe amount of external air intake must be set within the scope of the unit’s usage conditions when external air andinternal air is mixed together. This is especially important in the following cases, in which it is necessary to eitherfeed external air into the room after it has been processed or reduce the amount of external air that is fed in.1 When the external dew-point temperature is greater than the dry-bulb temperature of the air sucked into theunit.Ensure that processing is performed so that the external dew-point temperature is lower than the temperatureof the air sucked into the unit to prevent the risk of condensation building up.2 In the case of low external temperatures.There are cases in which the temperature of mixed air is lower than the operating range of the unit ifexcessive amounts of external air intake are used when the external temperature is low. This problem is tobe solved by either feeding external air into the room after it has been processed or reducing the amount ofexternal air that is fed in.3 When used in combination with humidifiersExternal air must always be processed when the external air temperature reaches freezing point to preventthe risk of the humidifier freezing.(4) Arranging Ducts and Filters in the FieldExternal air intake ducting must be arranged in the field. Externalair filters must also be installed without fail in order to prevent theintake of dust and grit.(5) Thermal Insulation for DuctsEnsure that all external air intake ducting is heat-insulatedwithout fail. Failure to observe this may result in the build-up ofcondensation.(6) External Air Intake CouplingEnsure that the design for external air intake is coupled with thefan blower operations of the indoor unit. There are cases in whichthe dust that accumulates in the filter is blown into the room if theexternal air is fed from the filter. There are also cases in which thenoise of external air being fed into the room can be heard fromthe indoor unit if external air is forcibly fed when the booster fan orother components on the indoor unit are not operating.(7) Booster Fan SelectionSelect the booster fan in accordance with the resistance ofthe external air intake duct (diagram on the pressure losscharacteristics of the air flow volume for flexible cylindrical ducts)and the resistance prevalent inside the unit (volume of external airfed and the resistance within the unit).(8) Attaching the External Air Intake Flangeo100o125300.10.20.40.60.8102030124650 100 200 300 500400Flexible Cylindrical DuctPressure Loss (Pa)/MeterAirflow (m3 /h)Air Flow Volume for Flexible CylindricalDuct-Pressure Loss