Myron L CTCIITD - Manual (Page 23)

B. SETUP PROCEDURES
These Setup procedures cover (1) checking out your new CTCII
Chemical Treatment Controller, (2) setting the control set point,
and (3) adjusting the hysteresis.
NOTE: A small screwdriver or tweaker will be required for some of
the following operations.
1. CHECK-OUT PROCEDURES
The following check-out procedures are used to verify that the
CTCII Controller is operating properly. Refer to figure V.A.1. for
the locations of the components referred to in this section.
a. Assumed that the clear cover and the front panel are removed,
the power is ON.
b. Assumes above PLUS that the controller is connected to an
appropriate Sensor, and that the Sensor is immersed in water
within the range that the Controller will be required to operate.
c. Limit Timer check out procedure.
a. Sensor OUT of water.
1. While pressing the Electronic Calibration Switch (EC),
rotate the Set Point Control toward “EC” on the dial.
Listen for the control relays to click ‘ON and OFF’ as the
set point moves past the EC location. The indicator light
(LED) will change from RED to GREEN.
If equipped with a display, verify that the display
is indicating a reading of approx. 2.50. If not, see
Calibration, section V.B.
2. Adjust the Set Point Control to the desired set point
value.
3. Reassemble.
b. Sensor IN water.
1. Rotate the Set Point Control on the front panel.
The relays will click and the indicator light (LED) will
change from RED to GREEN and GREEN to RED as the
knob is rotated. As the relays click and the LED changes
from RED to GREEN this is the value of the water.
Make a note of the reading on the display if so equipped.
It will be very close to the value indicated by the set point
control knob.
2. Set the Set Point Control to the desired set point value.
3. Reassemble.
c. Limit Timer Check Out Procedure
If the Limit Timer is installed, a YELLOW LED located above the
timer knob will also be ON. To test:
1. Rotate the Limit Timer Control on the front panel from
its highest position to its lowest position. Only the FEED
PUMP relay will click OFF (the YELLOW indicator light
will turn OFF).
2. Adjust the Limit Timer to the desired time.
2. SET POINT ADJUSTMENT
The set point setting is based upon the user’s particular water
purity specifications or requirements. Remove clear cover and
adjust control knob to desired set point value.
3. HYSTERESIS (DEAD BAND) ADJUSTMENT
The hysteresis or dead band is approximately ±6% of the set
point at full scale as it leaves the factory. Under normal (most)
conditions it will not be necessary to adjust.
However, if you desire to make an adjustment please keep the
following in mind.
The adjustment is very simple and is based on set point location.
If the set point is in the upper 75-100% of the scale, the hysteresis
control pot should be turned fully to the right.
If the set point is in the lower portion of the scale, i.e. 5-25% of
scale, the control pot may be turned fully to the left.
If you are operating in the center, 25-75% of scale, the control pot
may be adjusted in the center.
Or the hysteresis or dead band may be adjusted to tighten the
control of a particular process.
CAUTION: Adjusting the hysteresis too narrow may cause the
controller to fluctuate (on-off) due to flow, chemical mixing or
bubbles causing the relay to chatter. This condition is to be
avoided, it could damage your valves, pumps, etc. and will
eventually damage the relay.
The following is assuming the front panel is already removed and
the set point has been set, if not see “Set Point Adjustment”.
1. Turn power ON.
2. Locate the Hysteresis Control (HYST) - it is a single turn
pot. See figure V.A.1.
3. Adjust as described in “Hysteresis (Dead Band)
Adjustment” or as desired.
4. Rotate set point control on the front panel to verify
Hysteresis is set as desired.
5. Turn power OFF.
4. “FEED PUMP” LIMIT TIMER
If installed, adjust timer control knob as desired, to limit the ON
time of the feed pump.
REASSEMBLY
1. Carefully reinstall the front panel.
2. Reinstall the clear cover.
3. Reinstall the four (4) screws and tighten.
4. To operate, turn power ON.
! CAUTION - READ FOLLOWING CAREFULLY
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