Grasso RC6 - Starting after a Long Standstill Period of Time; Stopping the Compressor; Starting after a Seasonal Standstill or Maintenance Operations; Installation and Preparation for Use

c) Slowly open suction stop valve and watch suction
pressure [Psuc], which may not exceed the max.
value as given for each refrigerant in §A2.5.2.
Refrigerant liquid hammer, will damage
the compressor;
Superheat is always necessary! [dTo]≥5 K
d) More cylinders will be energized.
Watch maximum allowable motor current
[Imot] (refer to motor type plate).
e) Adjust pressure gauge stop valves, in order to avoid
vibration of the pointers (if present).
f) Open the stop valve in the oil return line from the
oil separator (if present).
Retighten the coupling bolts or check or
correct the tension of the V-belts and
retighten the foundation bolts (with
due respect to the torque settings given
by the supplier of the fasteners!) after
50 hours of operation.
A2.10.2 Restart (not within 2 minutes after a
stop, respectively starting after a short
standstill period of time [les than 1
month]). If Monitron Controlled, refer to
the Monitron Instruction manual)
• Proceed to the starting procedure of §A2.10.1
point a), b) and d).
A2.10.3 Starting after a seasonal standstill (1 till
6 months) or maintenance operations
• Check settings of control and safety equipment
(refer to §A2.5).
• Proceed to the complete starting procedure of
§A2.10.1, items a) through f).
A2.10.4 Starting after a long standstill period of
time (more than 6 months)
Consult your supplier. Monitron "standby" status
(ready to operate during this long period of time)
is not allowed! It is recommended to
proceed with the "Initial start-up" procedure of
§A2.10.1.
A2.10.5 Stopping the compressor
The compressor can be stopped at any moment,
however, consult the supplier if further actions are
required.
Refrigeration Division
Grasso
A: INSTALLATION AND PREPARATIONS FOR USE
v001.99.01.en Installation and Maintenance Manual RC(U)6 A2.5