4.2
TECHNICAL DATA
COMPRESSOR TYPE
Grasso VHS series
700
1100
1400
1800
Total number of cylinders
4
6
8
10
Cylinder bore (mm)
160
Piston stroke (mm)
110
Total swept volume at full-load in (m
3
/h)
speed
1500 min
-1
HP
796
1193
1592
1991
Standard direction of rotation
clockwise when facing shaft
end
Mass of bare compressor (without flywheel and other accessories) (kg)
794
1054
1495
1725
Shipping volume (m
3
)
1.2
1.4
1.8
2.1
Oil charge in crankcase and oil circuit (centre line / max. of sight glass),
approx. (dm
3
)
19.0
22.4
28.0
31.9
40.0
45.6
48.0
55.1
Mass moment of inertia of crank mechanism (without flywheel) (kg.m
2
)
0.342
0.474
0.840
0.730
4.3
GENERAL LIMITS OF OPERATION GRASSO VHS
When operating the compressor, none of the limits of operation as stated in the
table below must be exceeded. *
The diagram Figure 17, Page 53 represent the overall fields of application in
which the individual operation limits are taken into account.
General limits and fields of operation
REFRIGERANT
NH
3
Speed
n
max.
1500 min
-1
in combination with speed
controlled electric motor
min.
500 min
-1
Suction pressure = evaporating
pressure =crankcase pressure
p
o
/t
o
min.
0.3 bar(a)
-55 °C
max.
7.0 bar(a)
13 °C
Suction superheat
delta-t
min.
>0 °C
Actual suction temperature
t
a
min.
-50 °C
Discharge pressure = condensing
pressure
tc = saturated condensing temperature
*
10
*
11
P
s
*
12
/
t
c
max.
24.0 bar(a)
56 °C
Discharge pressure = condensing
pressure *
13
*
14
10
This pressure is also the maximum allowable pre-set value of the HP safety switch.
11
CAUTION!: When adjusting the HP and/or LP safety switch, care should be taken that the pressure
difference Δp=(p
C
-p
o
) never exceeds 26.0 bar(g).
12
“Ps“ is mentioned on type plate of the compressor
13
This pressure is also the maximum allowable pre-set value of the HP safety switch.
14
CAUTION!: When adjusting the HP and/or LP safety switch, care should be taken that the pressure
difference Δp=(p
C
-p
o
) never exceeds 19.0 bar (g).
APPENDIX; Product Information (PI)
TECHNICAL DATA
P-NL-094_imm_VHS_English_13
26.07.2021
51
