English
7
Tab. E -- Additional charge of R22 refrigerant ev-
ery metre of additional distance (be -
tween 5 and 15 m)
liquid line diameter
R22 refrigerant
charge (g/m)
8 mm (outer side of the line) 30
10 mm (outer side of the line) 53
12 mm (outer side of the line) 70
Va lues applying with condensation T = 50
°
C
NOTE: Under distance is meant the length of the liquid line, in-
cluding the bends, between the internal and the external units
(do not sum inlet and outlet).
6 . 3 --- O i l c h a r g e
The oil to be used when topping up is SUNI SO3GS; if SUNISO
3GS is unavailable use an oil with the same characteristi cs (see
Tab. F).
NEVER MIX DIFFERENT OILS TOGETHER. CLEAN THE PIP-
ING COMPLETELY BEFORE CHANGING THE TYPE OF OIL
USED.
Tab. F -- Suniso 3GS oil (standard)
approx. specific weight (at 15_C)
flash point (C.O.C.)
pour point
ENGLER viscosity at 50 _C
viscosity index
copper corrosion (100 _C, 3 hours) ASTM D130
neutralization value
conradson carbon residue
dielectric strength
:
:
:
:
:
:
:
:
:
0.91 kg/l
170 _C
--- 4 0 _C
2.7 E
0
1
0.03 max.
0%
>30kV
7 --- R407C units refrigerant
charge
CAUTION: THESE OPERATIONS MUST BE PERFORMED BY
AN EXPERT TECHNICIAN.
THE UNIT, AS SUPPLIED, IS PRECHARGED WITH
NITRO-
GEN.
7.1 --- Charac te risti cs of the refri g erant
fluid R407C
At standard temperature and pressure it is a colourless gas
with low toxicity, non---flammable, and it has an allowed expo-
sure limit value (AEL/TLV) corresponding to 1000 ppm (aver-
age value measured on 8 hours per day). In the event of leak-
age, air the room before use.
7.2 --- Refrigerant charge R407C
WHEN REPAIRING THE REFRIGERATION CIRCUIT,
PLEASE COLLECT ALL REFRIGERANT IN A CONTAINER:
DO NOT DISPOSE OF IT IN THE ENVIRONMENT.
1) After connecting the refrigerating lines to the main paths of
the valves, placed on the evaporating and motor condens-
ing units, discharge the precharged nitrogen by operating
on the ¼” SAE tap, with needle valve, of the motor con-
densing unit.
2) Empty the circuit with the special (quality) vacuum pump,
applying a vacuum of 0.3 absolute mbar.
3) After 3 hours check not to have exceeded 1.3 absolute
mbar. If the vacuum is not kept there are leaks. Repair the
circuit and repeat the operations from point 2. .
4) Connect the charge cylinder to the liquid line of the motor
condensing and start charging the amount of refrigerant
R407C as shown in Tab. G.
Tab. G -- Refrigerating charge R407C for a 5 m dis-
tance between the evaporating and mo-
tor condensing units.
MODEL Refrigerating charge R407C (kg)
Hisp SE+SC05 2.2
Hisp SE+SC06 2.5
Hisp SE+SC08 4.3
Hisp SE+SC10 4.4
Hisp SE+SC13 4.4
Hisp SE+SC14 4.4
5) In case it is impossible to complete charging shift the cylin-
der mode to compressor intake and complete charging or
however, after charging, operate as follows:
6) Start up the unit as shown in par. 3.2.
7) Start the compressor manually.
8) Guarantee a constant condensation temperature (prefer-
ably 50°C); if necessary, partially obstruct the condenser
exchange surface to obtain these conditions .
9) Wait until the operating conditions of the wholerefrigeration
circuit are normal.
10) Make sure, while the system is in standard operation, that
the superheating complies with following values (Tab. H:
manometric temperatures are shown).
Tab. H -- R407C: Superheating table
Internal temperature °C 24 27
Internal relative humidity %RH 50 50
Compresor superheating °C 8 12
Va lues applying with condensation T = 50
°
C
For refrigerating line distances between 5 and 10 m, increase
the charge of the circuit as shown in the following Tab. I.
Tab. I -- Additional charge of R407C refrigerant
every metre of additional distance (be-
tween 5 and 10 m)
liquid line diameter
R407C refrigerant
charge (g/m)
8 mm (outer side of the line) 30
10 mm (outer side of the line) 53
12 mm (outer side of the line) 70
Va lues applying with condensation T = 50
°
C
NOTE: Under distance is meant the length of the liquid line, in-
cluding the bends, between the internal and the external units
(do not sum inlet and outlet).
7 . 3 --- O i l c h a r g e
The oil to be used when topping up is MOBIL EAL ARCTIC
22CC; if MOBIL EAL ARCTIC 22CC is unavailable use an oil
with the same characteristics (see Tab. J).
NEVER MIX DIFFERENT OILS TOGETHER. CLEAN THE PIP-
ING COMPLETELY BEFORE CHANGING THE TYPE OF OIL
USED.
Tab. J -- Mobil Eal Arctic 22CC oil (standard)
approx. specific weight (at 15_C)
flash point (C.O.C.)
pour point
viscosity index
viscosity at 40_C
viscosity at 100_C
:
:
:
:
:
:
0.99 kg/l
245 _C
< --- 5 4 _C
116
23.6 cST
4.7 cST
It is therefore obvious that the taps of the compressor mustonly
be turned after the whole plant has been subjected to a vac-
uum and partial filling.
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