Panasonic S-36PU1E5A Service Manual

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Panasonic S-36PU1E5A Service Manual Manual pdf 4 page image

iiiRoHS· This product does not contain any hazardoussubstances prohibited by the RoHS Directive.WARNING· You are requested to use RoHS compliant formaintenance or repair.2. The standards for minimum room volume are as follows.(1) No partition (shaded portion)(2) When there is an effective opening with the adjacent roomfor ventilation of leaking refrigerant gas (opening withouta door, or an opening 0.15% or larger than the respectivefloor spaces at the top or bottom of the door).(3) If an indoor unit is installed in each partitioned room andthe refrigerant tubing is interconnected, the smallest roomof course becomes the object. But when mechanicalventilation is installed interlocked with a gas leakagedetector in the smallest room where the density limit isexceeded, the volume of the next smallest room becomesthe object.3. The minimum indoor floor space compared with theamount of refrigerant is roughly as follows (for room with2.7 m high ceiling):4035302520151050 10 20 30m 2Check of Density LimitThe room in which the air conditioner is to be installedrequires a design that in the event of refrigerant gasleaking out, its density will not exceed a set limit.The refrigerant (R410A), which is used in the air conditioner,is safe, without the toxicity or combustibility of ammonia, andis not restricted by laws imposed to protect the ozone layer.However, since it contains more than air, it poses the risk ofsuffocation if its density should rise excessively. Suffocationfrom leakage of refrigerant is almost non-existent. With therecent increase in the number of high density buildings,however, the installation of multi air conditioner systems ison the increase because of the need for effective use of floorspace, individual control, and energy conservation by curtailingheat and carrying power, etc.Most importantly, the multi air conditioner system is ableto replenish a large amount of refrigerant compared toconventional individual air conditioners. If a single unit of themulti air conditioner system is to be installed in a small room,select a suitable model and installation procedure so that if therefrigerant accidentally leaks out, its density does not reach thelimit (and in the event of an emergency, measures can be madebefore injury can occur).In a room where the density may exceed the limit, create anopening with adjacent rooms, or install mechanical ventilationcombined with a gas leak detection device. The density is asgiven below.Total amount of refrigerant (kg)Min. volume of the indoor unit installed room (m3 )< Density limit (kg/m3)The density limit of refrigerant which is used in multi airconditioners is 0.3 kg/m 3 (ISO 5149).NOTE1. If there are 2 or more refrigerating systems in a singlerefrigerating device, the amount of refrigerant should be ascharged in each independent device.For the amount of charge in this example:The possible amount of leaked refrigerant gas in rooms A,B and C is 10 kg.The possible amount of leaked refrigerant gas in rooms D,E and F is 15 kg.e.g., chargedamount (10 kg)Indoor unitOutdoor unite.g., chargedamount (15 kg)Room A Room B Room C Room D Room E Room FOutdoor unitRefrigerant tubingIndoor unitMechanical ventilation device – Gas leak detectorRefrigerant tubingOutdoor unitIndoor unitVerysmallroomSmallroomMediumroomLarge roomTotal amount of refrigerantMin. indoor floor spaceRange above thedensity limit of 0.3 kg/m3(countermeasures needed)kgRange below thedensity limit of 0.3 kg/m3(countermeasures notneeded)