hanep.. nag double post kahit 1 time ko lang pindot yung post quick reply.. pasensya po..
hanep.. nag double post kahit 1 time ko lang pindot yung post quick reply.. pasensya po..
Last edited by knicks1204; June 21st, 2008 at 01:56 AM.
Don't worry, sir, this duplicate posting issue has been manifesting itself ever since the vBulletin upgrade of tsikot. :-(
Anyway, re:LPG conversion, yes, I've thought about it, but maybe next year pa. Siyempre, ayaw kong mauna't maging Guinea Pig sa mga naka-Avanza. hehehehe.
Avanza is not designed to fit 9 people in, since pag ginawa mo facing each other seat configuration 4 passengers (sardine like) na agad 3rd row palang. This may void your warranty.
Madali lang mag series ka lang ng switch sa thermostat.... nahirapan ako maghanap ng switch.
Thanks sir lenuj
For me I dont want that conversion, kasi kakain sya ng space, IMO dangerous coz subjected ka sa high pressure so prone sa leak and explosion not like gas tank wala pressure, baka dumating ang araw pag most cars naka LPG na tataas naman ang LPG, parang diesel nung una mura lang nung dumami na diesel powered vehicle tumaas na, the same with bunker fuel. Besides para sakin matipid na Avanza ko kasi dati ko 10 kpl, masaya na ko nun, honda city 7speed CVT, e avanza ko 12 to 13 kpl
ACPers, have a question:
I usually drive alone or with my wife. Is there any effect if we dont open the aircon at the back?
My friend advised me kasi na kahit daw walang naka-upo sa 2nd and 3rd row, you need to open the A/C para hindi raw hirap compressor.
Help please. Thanks.
-bondz22-
Here's something from myavanza.net, specifically this page.
HTH...[SIZE=2]We need to understand how our aircond works.
1. Freon a.k.a. the cooling agent travels in the aluminium piping from the compressor to the cooling coil. The compressor compress the freon. When we compress any gas, it becomes cold liquid. This unstable cold liquid will absorb heat and try to turn into gas.
2. This compressed freon reaches the cooling coil and a fan will blow our cabin air across the cooling coil that consist of many fins (to increase the luas permukaan) for the freon to absorb heat. After passing by the fin, air become cool, what happen to the heat, absorb by the freon..
3. Then freon travels back to the compressor using a return pipe which is smaller in diameter compare to the one from compressor to cooling coil. This is to create a bottle neck on the returning pipe so freon spend more time in the cooling coil working (absorbing heat).
4. Before the heated freon reaches the compressor, it goes through the aircond coil in front of the radiator to let on-coming air cool down the freon first before sending the freon to the compressor.
So compressor don't have to work so hard..
5. There is a termostat under the dashboard near the blower where air goes in. This termostat will control whether the compressor magnet to be turn on or not. When on, the magnet will activate a clutch in the compressor to start the compression process. Otherwise, there will not be compression activity even though the belt is running.. Smart yeah..
Now I am pretty sure there is only one thermostat in Avanza because its not possible using two termostat to control one compressor. Not logical..
So, if one termostat, then it has to be under the front dashboard that controls the temperature inside the car.
By activating two blowers, then the overall temperature in the car can be more even. It will oso mean apart from the front cooling coil, the mid cooling coil oso feeds heated freon to the compressor, so, the compressor has to work harder. Higher FC, shorter life !!
If we only activate the front blower, only the front cooling coil feeding the heated freon to compressor, so compressor works less. Better FC, longer life. Set back will be the uneveness of the air temperature in the cabin. Front will definately be colder than back. Does that matter when there nobody sitting at the back
Now back to the smelly question. This is more biological then physic.. Even the mid blower is off, the freon still goes there and still water will condense at the cooling fin. That's where the bacteria start to party. If we on it often, the bacteria will have less chance to grow up because air blow, more water to condense, excess water get drain out, bring along with them the bacteria. I guess young bacteria smell better than old bacteria.. (hehe)
If we do not switch on mid blower, it should not be damaging to the piping system because the pressure in the piping system with or without the blower working is the same and that is the pressure created by the compressor. Infact, if we on the second blower, more hot air to be circulated to the front causing the compressor to work harder and longer. Then pressure to the piping system should be more or longer than with the mid blower off..
Summary..
When got no passenger at the back, no need to turn on 2nd blower. Why, read above...
If scared got smell from the 2nd blower, then turn on the 2nd blower all the time. Why, read the above...[/SIZE]
We need to understand how our aircond works.
1. Freon a.k.a. the cooling agent travels in the aluminium piping from the compressor to the cooling coil. The compressor compress the freon. When we compress any gas, it becomes cold liquid. This unstable cold liquid will absorb heat and try to turn into gas.
2. This compressed freon reaches the cooling coil and a fan will blow our cabin air across the cooling coil that consist of many fins (to increase the luas permukaan) for the freon to absorb heat. After passing by the fin, air become cool, what happen to the heat, absorb by the freon..
3. Then freon travels back to the compressor using a return pipe which is smaller in diameter compare to the one from compressor to cooling coil. This is to create a bottle neck on the returning pipe so freon spend more time in the cooling coil working (absorbing heat).
4. Before the heated freon reaches the compressor, it goes through the aircond coil in front of the radiator to let on-coming air cool down the freon first before sending the freon to the compressor.
So compressor don't have to work so hard..
5. There is a termostat under the dashboard near the blower where air goes in. This termostat will control whether the compressor magnet to be turn on or not. When on, the magnet will activate a clutch in the compressor to start the compression process. Otherwise, there will not be compression activity even though the belt is running.. Smart yeah..
Now I am pretty sure there is only one thermostat in Avanza because its not possible using two termostat to control one compressor. Not logical..
So, if one termostat, then it has to be under the front dashboard that controls the temperature inside the car.
By activating two blowers, then the overall temperature in the car can be more even. It will oso mean apart from the front cooling coil, the mid cooling coil oso feeds heated freon to the compressor, so, the compressor has to work harder. Higher FC, shorter life !!
If we only activate the front blower, only the front cooling coil feeding the heated freon to compressor, so compressor works less. Better FC, longer life. Set back will be the uneveness of the air temperature in the cabin. Front will definately be colder than back. Does that matter when there nobody sitting at the back
Now back to the smelly question. This is more biological then physic.. Even the mid blower is off, the freon still goes there and still water will condense at the cooling fin. That's where the bacteria start to party. If we on it often, the bacteria will have less chance to grow up because air blow, more water to condense, excess water get drain out, bring along with them the bacteria. I guess young bacteria smell better than old bacteria.. (hehe)
If we do not switch on mid blower, it should not be damaging to the piping system because the pressure in the piping system with or without the blower working is the same and that is the pressure created by the compressor. Infact, if we on the second blower, more hot air to be circulated to the front causing the compressor to work harder and longer. Then pressure to the piping system should be more or longer than with the mid blower off..
Summary..
When got no passenger at the back, no need to turn on 2nd blower. Why, read above...
If scared got smell from the 2nd blower, then turn on the 2nd blower all the time. Why, read the above...
Ay toto, sa tingin ko, baliktad yang theory mo. di ko alam kung sa-an ito nakuha but this is the reverse of the refrigeration cycle.
1. Yes the compressor will compress the refrigerant or Freon as the laymen knew it, hence it will become a high pressure gas. It will not become liquid.
2. The high pressure gas will pass to the condenser ( not the cooling fin or evaporator) to be condensed, or heat rejection, thus another change of state, from liquid to gas.
3.The high pressure liquid will pass thru the expansion device, to convert the high pressure liquid to low pressure.
4. This low pressure liquid freon will now pass thru the evaporator. Dito, ang freon will flash or turn into gas to absorb heat.
5. From the evaporator, pabalik na iyan sa compressor. at ang tubo dito ay malaki, hindi maliit, para hindi masakal ang gas. as a guide, discharge is small tube, suction is large tube.
Now, going to that question, I advise na kelangan pa-andarin and aircon sa likod kahit wala pasahero sa likod. The main reason?
Mga kaibigan, pag hindi mo pina-andar ang fan sa likod while you are using the front aircon, the refrigerant passing thru the evaporator will not be changed from liquid to gas. Bakit? kasi walang medium of heat ransfer,i.e. the fan. so ano ang effect nito? Wala naman solenoid valve to isolate the front and the rear air con system. Naka-split lang ang linya nito. Pag liquid ang bumalik sa copmpressor, inakupo. Todas ang compressor nyo. How? liquid is incompressible. the duty of the compressor is to compress the gas. pag liquid ang pumasok sa kanya, pipilitin niyan i-compress. the result? COMPRESSOR SLUGGING, WHICH WILL WRECK THE COMPRESSOR VALVES.
As stated above, Is it not the question of the same pressure passing thru the refrigerant pipes. It is the question of its state, either gas or liquid.
another thing, pag hindi mo i-switch ang air con mo sa likod, it weill take time to cool the compartment, requiring the compressor to work harder.
Hope this will clarify and help you yunderstand the principle or air conditioning system
Regards
Thank you po sa lahat ng contributors ng avanza forum, very helpful. Congratulations!
Last week, I had to jumpstart my Avanza G after not using it for 5 days. Yesterday, pinatulak ko nanaman po para makauwi from office. Looks like my battery is busted. Mukhang nag chcharge nman ang alternator kc nawawala nman yung battery lamp indicator kapag nka start na. Nevertheless, dalin ko sa Toyota Pasong Tamo sa monday para ma-check ang electrical. Sakto nman 15Km Chang oil na din.
Has anyone here experienced this? Or is this an isolated Avanza issue?
Baka may advice din kayo mga guru...I'm all ears.
Cheers!
Excellent, another bright discussion dagdag kaalaman na naman dami talaga natututunan sa thread na to... so I really have to keep my rear blower on.
Btw, may comment lang konti sa last part mo, pag front blower lang nakasindi mas less ang operation ng compressor, afaik depende sa location ng temp sensor yan, since sa front evaporator nakalagay ang sensor mas madali sya maka sense ng lamig pag front blower lang ang umaandar lalo na pag naka low ang fan setting, pag front and rear blower umaandar maghahati sila ng lamig so mas matagal mamaintain ang desired temp setting so mas magwowork ang compressor.
Kung nakalagay ang sensor sa cabin or sa rear evaporator at patay ang rear blower eh lagi umaandar compressor hanggat di nasesense ng sensor ang tamang temp. Kaya nga pinapatay ko rear blower para makatipid sa gas pero ngayon pirme ko na paandarin.... I take your advice...![]()
I included the link where I got the information, which turned out to be quite inaccurate, like you said. For that, I apologize. Kaya lang, the link will not be accessible to non-members pala (ngayon ko lang na-try, while logged out).
This is correct, sir. Hindi ko napansin iyung mali dun sa pinost ko.
1. Yes the compressor will compress the refrigerant or Freon as the laymen knew it, hence it will become a high pressure gas. It will not become liquid.
Oops, wait a minute... you lost me there...2. The high pressure gas will pass to the condenser ( not the cooling fin or evaporator) to be condensed, or heat rejection, thus another change of state, from liquid to gas."The high pressure gas..." will "... be condensed" -- doesn't that tell us that the GAS will become LIQUID, and not the other way around?
You'll have to forgive me if I don't agree with this. If what you stated is true, then Toyota wouldn't have put an OFF position on the rear A/C vent, so that this DAMAGE you mentioned would not happen.(snipped)...
Now, going to that question, I advise na kelangan pa-andarin and aircon sa likod kahit wala pasahero sa likod. The main reason?
Mga kaibigan, pag hindi mo pina-andar ang fan sa likod while you are using the front aircon, the refrigerant passing thru the evaporator will not be changed from liquid to gas. Bakit? kasi walang medium of heat ransfer,i.e. the fan. so ano ang effect nito? Wala naman solenoid valve to isolate the front and the rear air con system. Naka-split lang ang linya nito. Pag liquid ang bumalik sa copmpressor, inakupo. Todas ang compressor nyo. How? liquid is incompressible. the duty of the compressor is to compress the gas. pag liquid ang pumasok sa kanya, pipilitin niyan i-compress. the result? COMPRESSOR SLUGGING, WHICH WILL WRECK THE COMPRESSOR VALVES.
Here, I still am not convinced who is right and who is wrong. I'll probably have to experiment with this myself, although I believe I should turn on the rear vents just to prevent the sour smell from getting any worse.another thing, pag hindi mo i-switch ang air con mo sa likod, it weill take time to cool the compartment, requiring the compressor to work harder.
Just to give a clearer picture for our readers, I'll just post this entry from a refutable web site this time, instead of my original quote:
![]()
All current vehicle air-conditioning systems work on a loop system with refrigerant being recirculated around it. The compressor is belt driven from the engine and compresses the refrigerant to a high pressure in gas form.
It is then piped to the condenser situated in front or beside the radiator, where fan assisted air cools the gas which condenses to a warm liquid - still under high pressure.
Some systems use a receiver drier and expansion valve, in these types of system the liquid refrigerant passes through the receiver to remove moisture, impurities and to separate gas bubbles from the flow. It then passes to the expansion valve which restricts the flow creating a cooling effect in the evaporator as the liquid evaporates due to the reduction in pressure. The expansion valve closes at about 2 deg C to stop ice formation inside the heater box restricting the airflow as moisture collects from the rapidly cooled air. The gas is then returned to the compressor via the larger of the two pipes for another cycle.
On other systems the cooling effect is achieved by restricting the flow of liquid in the inlet pipe to the evaporator, the resultant drop in pressure giving the cooling as the liquid vapourises absorbing heat from its surroundings in the evaporator. The gas is then passed through an accumulator to prevent liquid refrigerant returning to the compressor and causing damage. This type of system is regulated by a pressure switch on the return line switching the compressor off if the pressure goes below a pre set point.
Warm air can hold much more moisture than cold air so as the air is rapidly cooled moisture is released and collects in the bottom of the heater box. This drains out through a small pipe to exit under the vehicle. Becase the heater box is often damp, mould growth can become a problem, causing bad smells - for more information on this click here.
Various controls are added to the systems and differ from each manufacturer, to prevent pressures from being to high or low, the evaporator freezing etc, and to operate fans to cool the condenser.
Most problems occur when the refrigerant leaks out and the pressure drops below a pre set level, the system will shut down to prevent the compressor failing. This can be rectified by recharging the system with refrigerant. Loss of cooling efficiency may be noticed as the refrigerant level drops. If the system requires topping up at frequent intervals the leak should be traced and repaired. The most common location of leaks is the condenser due to it’s exposed location and constant heat/pressure changes.
If the system becomes completely empty the a vacuum must be applied before it is recharged as a tiny amount of air or moisture in the system will cause early failure.
A small amount of oil is added to the refrigerant to lubricate the compressor and seals.
This is not intended as a repair manual but merely to give an overview of how it works!!.
Thanks.
SIrs woohoo and Burjegol,
Thanks for the technical posts.
Clarification lang. Parehas lang ba ang Air conditioning System (Car, room, etc) sa refrigeration system (Refrigerator). As a layman, Aircon system talks about the "air" inside the room. The ref system talks not about the "air" ? inside an enclosed?/ a pressurized? area.
Recommendation: Pwede siguro either of you two starts a new thread sa subforum for the following reasons: (Tama ba Mr Prez?)
1. Maiinit talaga sa Pilipinas (Tropical, Equator, etc)
2. Mahal ang maintenance ng Car Aircon System
3. Maraming matu toto sa mga discusion. Especially newbies and non-techies members.
Standing by lang kami, sirs. TIA
Hmm... this reminds me... I need to install a "DIE HARD" battery charge monitor on my Avanza. This is a useful device lalo na sa mga A/T... Merong ganito ang pickup ko, at kapag nag-a-undercharge na nang madalas ang indicator, pinapalitan ko na ang battery ng sasakyan...
Thanks. Na-remind tuloy ako. Hehehe.
Ayon sa howstuffworks, "An air conditioner is basically a refrigerator without the insulated box. It uses the evaporation of a refrigerant, like Freon, to provide cooling."
Siguro sa Avanza Aircon Concerns thread na lang... what say you?Recommendation: Pwede siguro either of you two starts a new thread sa subforum for the following reasons: (Tama ba Mr Prez?)
1. Maiinit talaga sa Pilipinas (Tropical, Equator, etc)
2. Mahal ang maintenance ng Car Aircon System
3. Maraming matu toto sa mga discusion. Especially newbies and non-techies members.
Standing by lang kami, sirs. TIA
wala na ata yung display na yun ng autogas..mukhang napa raffle na.
woohoo & burgegol,
nice inputbuti na lang aircon ang topic malamig
malamig din ang paliwanagan
pwede nga sa avanza aircon concern thread na lang i-post![]()
Last edited by jaspi11; June 22nd, 2008 at 12:42 AM.
Fellow ACP members,
Let us brace for Typhoon Frank. Mukhang dadaanan ang Metro Manila.
Sa forecast dadaanan na naman ng Pangasinan. Mararamdaman din dito sa Baguio and Ilocos Region.
Ingat and be safe always....