American Magnetics 135 & 136 Liquid Helium Level Instruments (CE-Marked) - Manual (Page 24)

12 Rev. 3
Installation
Installing a Fill Valve
2.4 Installing the Optional Solenoid-Operated Fill Valve
Install the solenoid-operated fill valve by connecting the valve power cable
to the AC controller output receptacle on the rear panel of the instrument.
The standard AMI supplied valve has a 9/32 inch orifice and the input and
output are tapped for 3/8 NPT.
Caution
When using a solenoid-operated control valve with the Model 136,
ensure the valve is configured for the operating voltage of the Model
136. Failure to do so will result in faulty operation and may also
result in valve damage.
Warning
Before touching any of the controller output receptacle terminals or
touching the wiring connected to these terminals, remove power to
the instrument by unplugging it or turning the power switch to the
off position.
The controller output receptacle conducts hazardous AC line voltage
potentials. It is for use with equipment which has no live parts
which are accessible. Conductors connected to its terminals must be
insulated from user contact by reinforced or double insulation
capable of withstanding 4250 V (impulse) for a 230 VAC Category II
installation, or 2550 V (impulse) for a 120 VAC Category II
installation.
This instrument is designed for operation from a single-phase power
source for maximum safety. The controller output receptacle
circuitry only switches the “line” (“hot”) connection to the AC mains.
If two-phase power is applied, any equipment connected to the
controller output receptacle conducts hazardous AC voltage even
when the controller output receptacle is not energized.
2.5 Connecting any Communications Option
If a communication option has been installed in the instrument, prepare
the mating end of the connector and plug it into the communication
connector on the rear panel. Refer to the applicable section of this manual
for a description of the communications connector wiring.
0RGHO