System Components
8
311592Z
System Components
F
IG
. 1 illustrates a typical North American system instal-
lation, showing the major system components. Also see
the wiring schematic in F
IG
. 2 and F
IG
. 3.
Hazardous Area
See F
IG
. 1. The following system components are
approved for use in a hazardous area:
•
E-Flo Electric Circulation Pump
•
Explosion-Proof Electric Motor
•
Local Control Box (accessory)
•
Pneumatic Back Pressure Regulator (accessory)
•
Sensor Control Circuit (option). See intrinsic safety
installation requirements below.
Schedule of Limitations
ATEX:
1.
After the installation of the Electric Circulation
Pump Control into an enclosure the creepage
and clearance distances shall meet the require-
ments of 6.4 (Table 4) of EN50020.
2.
After the installation of the Electric Circulation
Pump Control into an enclosure the assembly
shall be capable of withstanding an r.m.s. a.c.
test voltage of twice the voltage of the intrinsi-
cally safe circuit or 500 V, whichever is the
greater.
Sensor Circuit Wetted Parts
Pressure transducer: 17-4 PH stainless steel
NOTE:
All other components shown in F
IG
. 1
must
be
installed in a
non-hazardous area
.
Non-Hazardous Area
See F
IG
. 1. Install the following components in a
non-hazardous area:
•
System Power Disconnect Switch
•
Electrical Noise Filter (accessory)
•
Variable Frequency Drive (accessory)
•
Power Module (accessory)
•
3-Way Pneumatic Solenoid Valve (accessory)
Do not install equipment approved only for non-haz-
ardous locations in a hazardous area.
293140l
Содержание E-Flo
Страница 4: ...Models 4 311592Z...
