Tool For Installing / Servicing Refrigerant Piping - Panasonic CS-PW9GKX Service Manual

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d. R410A refrigerating machine oil
Conventionally, mineral oil or a syntheti c oil suc h as alkylbenzen e has been used for R22 refrigerating ma chin e
oil . Becaus e of the poo r compatibili ty betwe en R410 A and conve ntional oils l ike mineral oil, however, ther e is a
tenden cy f or the refrigerat ing machine oil to collect in the refri gera ting cycle. For t his reas on, poly este r an d
other synth etic oils which have a hig h co mpa tibil ity w ith R410 A are us ed as re frigerating m ach ine oil.
Because of the hig h hygro scop ic p roperty of synthetic oil, more ca re must be t aken in its handling tha n was
necess ary with conventional refrig erat ing mac hine oils . Al so, t hese sy nthe tic oils will degrade if mixed wi th
mi neral oil or alkyl ben zene , ca usin g cl oggi ng i n capillary t ubes or com pres sor mal func tion . Do not mix the m
under any circu mst ances.
Safety Measure When Installing / Receiving Refrigerant Piping
10.1.2
Cause the gas pressure of R4 10A is a pproxim ately 1.6 tim es as hi gh as that o f R22, a mistake in installat ion or
servici ng could result in a maj or accident. It is es sent ial t hat you use R410a tool s an d materials, and that you
observe the fol lowi ng preca utions to ensure safety.
1. Do not u se any refrigerant other than R410A in Acs that have been used with R410A .
2. If any refrigerant gas leaks while you are working, ventilate the room. Toxic gas may be generated if r efrigerant
gas is exposed to a direct flame.
When instal ling or transferring an AC, do not allow any air or sub stance other than R410A to mix into the
3.
refri geration cycle. I f it doe s, the p ressure in the r efrigeration cycle can become abnormally high, possibly
causing an explosion and/or injury.
4. Afte r finishing the installation, check t o make sure there is no refrigerant gas leaking.
5.
When install ing or transf erring an AC, follow the instruct ions in the i nsta llation instructions caref ully. Incorrect
installation can resul t in an abnormal refri geration cycl e or wat er leakage, elect ric s hock, fire, et c.
6.
Do not perform any alterations on the AC unit under any ci rcumstances. Have all repair work done by a specialist.
Incorrect repairs can result in an water leakage, el ectric shock, fire, etc.
10.2.

TOOL FOR INSTALLING / SERVICING REFRIGERANT PIPING

10.2.1 Necessary Tools
In ord er to pre ven t an R41 0A A C from mistaken ly being charged with any other re frige ran t, the dia met er of the 3-w ay
v alve serv ice port on t he o utdo or u nit h as b een cha nged . Als o, t o inc reas e its abi lity t o wi thsta nd p res sure , the
o ppo sing dim ensi ons have been changed f or the refrigerant pipe flaring size and flare nu t. Ac cord ingl y, wh en
in stal ling or s ervic ing refri gera nt p iping, yo u must have both the R41 0A a nd o rdin ary tool s list ed b elow.
Type of work
Flaring
Bending, connecting pipes
Air purging
Gas leak inspection
*1 ) Yo u ca n use th e co nventional (R 22) flaring t ool. If you ne ed t o buy a n ew t ool, buy the R41 0A type.
*2 ) Us e w hen it is necessa ry to det ect smal l gas lea ks.
*F or o the r ins talla tion wor k, yo u sh ould have th e usual t ools, su ch as screwdrivers (+ ,-), a me tal-c uttin g sa w, a n
e lectr ical drill , a h ole c ore drill (65 or 70 dia .), a tape measu re, a leve l, a thermom eter, a c lam p me ter, an in sula tion
te ster, a v oltm eter, etc .
Type of work
Refrigerant charging
Brazing (Replacing refrigerating
cycle part*1)
*1 ) Al way s rep lace the dry er of the outdoor unit at the same time. The rep lace me nt dr yer i s wr app ed in a vacuum
p ack. Rep lace it la st a mon g th e ref rige rating cycle parts. St art brazin g as soo n as you have opene d th e va cuu m pa ck,
a nd b egin the vac uum ing
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Table 3 Tools for installation, transferring or replacement
Ordinary tools
Fl aring t ool (cl utch ty pe), p ipe cut ter, re amer
To rque wrenc h (no minal diam eter 1/4,
3/ 8,1/2) Fixed spann er (op posin g side s 12
m m, 17 mm, 19 mm ) Adj ustabl e wre nch,
Sp ring b ender
Va cuum pump Hexag onal wrench
(o pposin g side s 4 mm )
Ga s leak inspec tion fl uid or soapy water
Table 4 Tool for serving
Ordinary tools
Nitr ogen blow s et (be sure to use n itroge n
blo wing fo r all b razing ), and brazin g), an d
bra zing m achin e
R410A tools
Cop per pip e gau ge for cleara nce
Adju stmen t, flari ng too l (clutc h type )*1)
Mani fold ga uge, c hargin g hos e, vac uum
pump adap tor
Electric gas leak detector for HFC
refrigera nt*2)
Elec tronic scale for refrigerant char ging
Refr igeran t cylin der Charging orific e and
packing fo r refrig erant cylinder
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R410A tools