Panasonic S-160PE1R5A, Technical Data And Service Manual

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1-70
1 1
Ensure to fi ll only with liquid refrigerant when refi lling.
If gas refrigerant is fi lled, the refrigerant composition will
not be balanced and will cause abnormal operation.
Cylinder with
a siphon tube
Liquid refrigerant
Siphon tube
Cylinder
Cylinder
Gas refrigerant
Possible
(For refi lling due to a leak)
Not possible
1-14. REGARDING REFRIGERANT FILLING
Precautions during refrigerant fi lling
Charging with refrigerant
If using cylinders as shown in the bottom left diagram; without
a siphon tube inside, turn it upside down and use it.
(It is recommended to use the manifold with the side glass.)
Use tools that are designed specifi cally for R410A, for pressure resistance and to prevent mixing impurities.
Fill the refrigerant from the 3-way valve’s service port on the liquid-side.
For fi lling and replacing all refrigerant
For refi lling refrigerant, fi rst collect all residual refrigerant and after vacuum dehydration using the vacuum pump. Refi ll the
refrigerant according to the prescribed amount stated on the placard affi xed to this unit.
Precautions after the pipes’ connection have completed
Ensure to open the 3-way valve after completing the piping installation, leak test and vacuuming. If it is closed during operation,
it can lead to compressor failure.
At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe length of 30m.
If the equivalent pipe length used will be 30m or less, no additional charging will be necessary.
If the equivalent pipe length will be between 30 and 50m, charge with additional refrigerant according to the equivalent length
given in the table below.
For standard type
Pump down operation
Please refer to the service manual for pump down method.
Liquid refrigerant
Model name Add. gas amount Equivalent length Minimum length
m 5 m 0 5 m /
g
0 5
m 5 m 0 5 m / g 0 8 A 8 R 2 E P 4 2 2 / A 8 R 2 E P 0 0 2 - U
U-160PE2R8A/180PE2R8A
1-13. VACUUM PURGING
Keep 3-way valve fully closed and pressurize through 3-way valve service port.
Do not pressurize to the default value at once. Pressurize gradually.
1 Pressurize to 0.5MPa (5k g f/cm²G) and then leave it for 5 minutes
to ensure that the pressure does not drop.
2 Pressurize to 1.5MPa (15k g f/cm²G) and leave it for 5 minutes
to ensure that the pressure does not drop.
3 For the test, pressurize to 4.15MPa and leave it for about 1 day
to ensure that the pressure does not drop.
Leak Tightness Test Method
Vacuum Purging
Use a vacuum pump (with back-fl ow prevention device) to vacuum
through the 3-way valve service port to achieve the pressure below
-101kPa (5 Toor).
Air and moisture remaining in the refrigerant system due to poor
vacuum drying can cause performance decrement and malfunction
of the compressor.
Outdoor unit
3-way
valve
Indoor unit
Use nitrogen gas for the leak tightness test.
Using fl ammable gas can cause an explosion.
Pressure
meter
Nitrogen Refrigerant
meter
Vacuum
pump
3. Insulating th e R efrigerant Tub ing
Tub ing Insulation
Thermal insulation must b e applied to all units tub ing,
including distrib ution j oint (f ield supply) .
* F or gas tub ing, the insulation material must b e heat
resistant to 120° C or ab ove .
F or other tub ing, it must b e heat resistant to 80° C or ab ove .
Insulation material thickn ess must b e 10 mm or greater.
If the conditions inside the ceiling exceed D B 30° C and
R H 70% , increase the thickn ess of the gas tub ing
insulation material b y 1 step.
Tw o tub es arranged togeth er
Liq uid tub ing
G as tub ing
Insulation
Fig. 1- 28
If th e exterior of th e outdoor unit v alv es h as b een
finish ed w ith a sq uare duct cov ering, mak e sure you
allow sufficient space to access th e v alv es and to
allow th e panels to b e attach ed and remov ed.
T
W ind the w hite insulation tape around the f lare nuts at the
gas tub e connections.
Then cove r up the tub ing connections w ith the f lare insulator,
and f ill the gap at the union w ith the supplied b lack insulation
tape.
F inally, f asten the insulator at b oth ends w ith the supplied vi nyl
clamps. (F ig. 1- 29)
C A U TIO N
< Type E1>
< Type E3>
C A U TIO N
F lare insulator (supplied)
Insulation tape
(w hite)(supplied)
Tub e insulator (not supplied)
Heat resistant 120° C or ab ov e
Tub e insulator (not supplied)
Heat resistant 120° C or ab ov e
F lare union
F lare nut
U nit side
Fig. 1- 29
Insulation material
The material used f or insulation must have good insulation
characteristics, b e easy to use, b e age resistant, and must not
easily ab sorb moisture.
A fter a tub e h as b een insulated, nev er try to b end it into a narrow curv e b ecause
it can cause th e tub e to b reak or crack .
N ev er grasp th e drain or refrigerant connecting outlets w h en mov ing th e unit.
4. Taping th e Tub es
(1) At this time, the ref rigerant tub es (and electrical w iring
if local codes permit) should b e taped together w ith
armoring tape in 1 b undle. To preve nt condensation
f rom ove rf low ing the drain pan, ke ep the drain hose
separate f rom the ref rigerant tub ing.
(2) W rap the armoring tape f rom the b ottom of the outdoor
unit to the top of the tub ing w here it enters the w all.
As yo u w rap the tub ing, ove rlap half of each previ ous
tape turn.
(3) Clamp the tub ing b undle to the w all, using 1 clamp
approx. each meter. (F ig. 1- 30)
Fig. 1- 30 N O T E
D o not w ind the armoring tape too tightly since this w ill
decrease the heat insulation ef f ect.
Also ensure that the condensation drain hose splits aw ay
f rom the b undle and drips clear of the unit and the tub ing.
5. Finish ing th e Installation
Af ter f inishing insulating and taping ove r the tub ing, use sealing putty to seal
of f the hole in the w all to preve nt rain and draf t f rom entering. (F ig. 1- 31)
Apply putty here
Tub ing
Fig. 1- 31
Insulated tub es
D rain hose
Clamp
F lare insulator (supplied)
F lare union
F lare nut
U nit side
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