18
3.7 Icon Definitions
Symbol
Publication
Description
IEC 417, No.5019
Protective Conductor Terminal
|
IEC 417, No. 5007
On (Supply)
O
IEC 417, No. 5008
Off (Supply)
ISO 3864, No. B.3.6
Caution, risk of electric shock
ISO 3864, No. B.3.1
Caution
3.8 Electrical installation
The various standard wiring options are shown in figure 1, below. Your controller will arrive from the factory pre
-
wired or ready for hardwiring. Depending on your configuration of controller options, you may be required to hard
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wire some or all of the input/output devices. Refer to figures 6 through 18 for circuit board layout and wiring.
Note: when wiring the optional flow meter contactor input, the 4-20 mA outputs or a remote flow switch, it is advis
-
able to use stranded, twisted, shielded pair wire between 22-26 AWG. Shield should be terminated at the controller at
the most convenient shield terminal.
CAUTION
1.
There are live circuits inside the controller even when the power switch on the front panel is in the OFF posi-
tion! The front panel must never be opened before power to the controller is REMOVED!
If your controller is prewired, it is supplied with an 8 foot, 18 AWG power cord with USA style plug. A tool
(#1 Phillips driver) is required to open the front panel.
2.
When mounting the controller, make sure there is clear access to the disconnecting device!
3.
The electrical installation of the controller must be done by trained personnel only and conform to all applica-
ble National, State and Local codes!
4.
Proper grounding of this product is required. Any attempt to bypass the grounding will compromise the safety
of persons and property.
5.
Operating this product in a manner not specified by Walchem may impair the protection provided by the equip
-
ment.
