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Thread: Perfection
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04-08-2013, 04:30 PM #1
Perfection
Gents & the Monkeys [Install & Spanner]
question
what would be the optimal pipe run ?
Looking at installing Daikin RSX35J to FTXS35J
Read through http://www.refrigeration-engineer.co...em-1-meter-run
Chewed the fat with my split persona
Dont like no reciever [over condensing [oops Mad Fridgie may shoot me for that term] or liquid slugging depending on conditions/mode]
So am looking for the perfect pipe length for perfect running conditions with a 24*c - 32*c ambient
???
R's xChillerman
If the World did not Suck, We would all fall off !
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04-08-2013, 05:02 PM #2
Re: Perfection
all splits req a minimum 1-1.5mtr run- ive done units back to back and had to cut off the flare nuts on the indoor and braze 300mm of pipe to go straight on the condenser- any piperun over a few mtrs will affect performance, bends,restrictions, oil return- and knowing you if you flogged one of them fizzers and actually bought a 3.5 wall mount youd be ringing up daikin technical complaining about mass flow issues, heatloss thru lagging and inefficiency of an inverter compressor at low frequencies
also dont remove any of the pre charged gas if u have a short piperun- it doesnt say it in the destructions !!!
daikin suggest u sit in the lounge in the nack and sweat!Last edited by install monkey; 04-08-2013 at 05:06 PM.
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04-08-2013, 05:14 PM #3
Re: Perfection
haha Thanx for the personal reference mate
I'm just looking to get max life out of the pot
If they say minimum pipe run of 3m & max 10m
Then me thinking I best have nearer the 10m run than 3m
As with no reciever to store the excess refrigerant
Either subcooling needs to be high enough to allow the volume of the mass to be able to fit in the condenser/liquid line or excessive amount of refrigerant will be in the low side
the second would surely cause however small over charge symptons
its a bit hit n miss with this run length lark annit
or is it just me
R's xChillermanIf the World did not Suck, We would all fall off !
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04-08-2013, 05:24 PM #4
Re: Perfection
condenser acts as a reciever and lev is controlled to maintain ur 6 deg superheat. compressor frequency (loading - in a chillermans terminology) is regulated via discharge temp,compressor current and outdoor ambient,indoor freeze protection
http://www.mediafire.com/download/dl.../ftyn35c_d.pdf
have a flick thorugh
cheaper option is feed ur cats to the dogs and sleep in the log cabin in ur garden!!!
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04-08-2013, 05:26 PM #5
Re: Perfection
haha
cheers thought there must be more to this than stoneage
R's xChillermanIf the World did not Suck, We would all fall off !
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04-08-2013, 05:29 PM #6
Re: Perfection
Hey theres 246 pages !!!
Will be back in quite a while
R's xChillermanIf the World did not Suck, We would all fall off !
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04-08-2013, 05:35 PM #7
Re: Perfection
if you do part with money to purchase a unit, remember to a chiller dude- splits are work of the devil and black mans magic- so no sight glasses- i know you were tempted- no driers,isolation valves,oil traps,solonoids,and no widgets!
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04-08-2013, 05:44 PM #8
Re: Perfection
http://www.daikin.co.uk/domestic/nee...tion/index.jsp
before you comment on true air conditioning principals of heating/cooling and humidity control and air changes
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04-08-2013, 05:45 PM #9
Re: Perfection
well you got my number with the drier , why cant I have one ?
they certainly are work of the devil !
frequency is varied only on load which is derived from room temp to set point
it dont control subcooling and allow for the hit n miss scenario of pre charging for 3m-10m
think I will be removing n adding charge once installed to find the perfect amount
as a head start what is the amount you add for every metre over 10
I can start by removing this for every metre under 10
R's xChillermanIf the World did not Suck, We would all fall off !
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04-08-2013, 05:57 PM #10
Re: Perfection
4 meters is the optimal run.
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04-08-2013, 06:00 PM #11
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04-08-2013, 06:05 PM #12
Re: Perfection
In order to obtain the dependability of the compressor, the compressor must be stopped
according to the conditions of the temperature of the outdoor air and outdoor heat exchanger.
Detail Operation stop depending on the outdoor air temperature
Compressor operation turns OFF under the conditions that the system is in cooling operation
and outdoor air temperature is below –10°C (0°C for (A)RK(X)H, R(Y)N models).
- hang on i'll stop here- better start checking of a 3.5kw chiller and a fan coil with 4 port actuator to control within .1deg
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04-08-2013, 06:11 PM #13
Re: Perfection
Don't think you will have any problems with factory charge and 3-3.5m pipe run, accumulator will protect compressor from slugs imho.
Got a panasonic inverter thats been ok for 8 years with 2m pipe run!Mostly found in Oxfordshire, UK :)
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04-08-2013, 06:16 PM #14
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04-08-2013, 06:19 PM #15
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04-08-2013, 06:21 PM #16
Re: Perfection
floodback prevention during low ambient conditions
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04-08-2013, 06:28 PM #17
Re: Perfection
oh I see cheers
damn they made these things too compicated
could run ok with relay, contactor n bulb thermostat with the correct charge
huh can see this system being a experimental rig when that invertor board pops
R's xChillermanIf the World did not Suck, We would all fall off !