Liquid
Level Controllers, Electronic Type
1.
NATIONAL Liquid Level Controller
Standard type, 220/380V 50Hz
With: Control Unit 21F-G
Probe Fitting PS-3R (with 10K ohms resistor)
3 Pcs Electrodes (probe rods)
Available Separately:
Control Unit 21F-G
Fitting PS-3R
Probe/Electrode
2.
NATIONAL Liquid Level Controller
For High Temperature (150
C)
and high pressure upto 10 kgf/cm
With 3 Pcs Hi Temp fitting
High Temp. fitting AF6121 separately available
APPLICATION:
Automatic
Level Control of Elevated Tank or Drain Reservoir
Suitable for Control of:
Single Phase 220V 50Hz Motor (Pump-Motor) OR
Three Phase 380/415V 50Hz Motor (Pump-Motor)
SPECIFICATIONS:
•
Control Capacity : 5A 250VAC
• Electrical Life : More than 0.5 Million operations
• Tolerance of rated voltage : ± 15%
• Built-in surge arrester circuit
• Controller with GOLDEN Bridge Circuit.
INSTRUCTIONS:
-
The Standard controller is to be used as 2-wire type, therefore
connect the given 10K ohms resistor between the E1 and E2 terminals
inside Probe Fitting PS-3R. Then make two wire connections,
one each from E1 and E3 Electrode terminals in PS-3R to the
control unit 21F-G.
-
The High Temperature & High Pressure type Controller is
to be used as 3-wire type, hence make three wire connections,
one from each high T/P Probe fitting AF6121 to the control unit
21F-G.
-
For using above controller for control of 3-phase motor please
refer to the wiring diagram inside the cover of the control
unit 21F-G.
-
Use supply terminals S0 & S1
for 220VAC or S0 & S2
for 380/415V 50Hz inside control unit 21F-G.
-
For mounting Probe Fitting PS-3R make a hole of 54mm dia in
tank or use a coupling of 54mm dia.
-
Cut the Electrode E1 as per your upper level control requirement
before fitting.
-
Electrode E2 controls the lower level and the size may be cut
if required.
-
Electrode E3 should always be longer than or equal to the Electrode
E2.
