GA 12.107/5.02 - 12/97
Description
5
Safety equipment
Indication at the compressor unit
1
Pressure switch (PSL1): Pressure differential between low-
LOW PRESSURE LED lights
pressure helium and atmospheric pressure < 1,5
±0,5
bar (22 psi)
2
Thermal switch (TSH1): helium temperature following
TEMPERATURE LED lights
the heat exchanger > 38
°
C (100
°
F)
3
Thermal switch (TSH 2): helium temperature before the
TEMPERATURE LED lights
heat exchanger > 150
°
C (302
°
F)
4
Thermal switch (Klixon) inside the compressor capsule
No indication
5
Thermal switch in the power module: power module temperature > 65
°
C (149
°
F)
No indication
6
Motor protection switch (master switch)
Switch is tripped
7
2 circuit breakers for the cold head (240 V AC)
Circuit breaker tripped
8
Circuit breaker for control voltage (24 V DC).
Circuit breaker tripped
9
Bypass valve: opens a shunt between the high- and low-pressure
No indication
helium circuits if the pressure differential exceeds 19
+1,5
bar (276 psi)
10
Safety valve: opens the helium circuit to the atmosphere if the
No indication
high-pressure segment exceeds 31
±1,5
bar (435 psig)
11
Check valve in the low-pressure helium line: keeps oil from
No indication
flowing back to the cold head
If any of the safety features from 1 through 8 opens, this will cause the compressor unit to shut down.
Safety Equipment
1.2 Standard Equipment
The compressor units are shipped from the factory filled
with helium and oil and ready for immediate operation.
They are equipped with
– mains power cord (2.2 m long), and
– a master switch.
The self-sealing couplings are closed off with protective
caps.
Also supplied with the unit are:
– 1 electrical wiring diagram,
– 3 certificates of compliance with section 9 of the
pressurized vessels code,
– 1 adapter (6 mm Swagelock
1
/
4
” self-sealing
coupling),
– 2 clamping rings (spare parts for water connection).
– 1 open-end wrench 1”,
– 1 open-end wrench 1
3
/
16
”.
Summary of Contents for RW 6000-1
Page 23: ...GA 12 107 5 02 12 97 Notes 23...
