Table of Contents
Advertisement
APPENDIX; Product Information (PI)
GENERAL LIMITS OF OPERATION GRASSO V
The diagrams overleaf represent the overall fields of application in which the
individual operation limits are taken into account.
General limits and fields of operation
Suction pressure = evaporating
pressure =crankcase pressure
Actual suction temperature
10
11
12
13
14
15
16
52
REFRIGERANT
Compressor speed
Suction superheat
Superheat LP suction
Discharge pressure =
condensing pressure
tc = saturated condensing
11
temperature *
12
*
Discharge pressure =
14
condensing pressure *
15
*
Design pressure
In practice, it is not so much the individual operation limits as combinations of them that are
decisive for the conditions under which a compressor may operate. To check the various
possibilities in this respect, use should be made of the "fields of application" ).
This pressure is also the maximum allowable pre-set value of the HP safety switch.
CAUTION!: When adjusting the HP and/or LP safety switch, care should be taken that the pressure
difference Δp=(p
-p
) never exceeds 26.0 bar(g).
C
o
"Ps" is mentioned on type plate of the compressor
This pressure is also the maximum allowable pre-set value of the HP safety switch.
CAUTION!: When adjusting the HP and/or LP safety switch, care should be taken that the pressure
difference Δp=(p
-p
) never exceeds 19.0 bar (g).
C
o
"PSs" is mentioned on type plate of the compressor (Possibly "Pd" is mentioned for compressors
delivered before 1-Mar-2013)
Grasso V
300(T) .. 600(T)
Grasso V
700(T) ..
1800(T)
n
Grasso V
300(T) .. 600(T)
Grasso V
700(T) ..
1800(T)
Grasso V
Grasso V
p
/t
300(T) .. 600(T)
o
o
Grasso V
700(T) ..
1800(T)
Grasso V
delta-t
Grasso VT
t
Grasso V(T)
a
Grasso V
300(T) .. 600(T)
13
P
*
/
s
t
c
Grasso V
700(T) ..
1800(T)
16
PS
*
Grasso V(T)
s
NH
3
-1
500 min
for direct drive
-1
600 min
for V-belt drive
min.
-1
500 min
for direct drive
-1
700 min
for V-belt drive
1500 min
max.
1200 min
0.3 bar(a)
min.
-55 °C
8.5 bar(a)
19 °C
max.
7.0 bar(a)
13 °C
min.
>0 °C
min.
-50 °C
26.0 bar(a)
60 °C
max.
24.0 bar(a)
56 °C
26.5 bar(a)
This pressure deviates from the so
called max. discharge
-
pressure=condensing pressure
(allowed during operation) as stated
in the table.
0089288_imm_v_english_19
-1
-1
07.04.2021
Advertisement
Table of Contents
Troubleshooting
