MANUAL
CT
Controllers
INSTALLATION
Page 13
INSTALLATION MUST FOLLOW
ALL APPLICABLE ELECTRICAL CODES.
ELECTRICAL
Electrical Codes
The controller is available in either hard-wiring or plug-in
configurations. Make sure to use the proper type of wiring
according to the local electrical code, usually the same as for
the chemical feeders.
The internal wiring of the controller is standard US, i.e.:
BLACK
HOT
WHITE
COMMON
GREEN
GROUND
Grounding (GFI)
A grounding lug is provided on the left side of the cabinet. It is
important to connect it to a proper earth ground to prevent
dangerous current leakage and electrical shock. Ground Fault
Interruption (GFI) protection is also strongly recommended for
all installations.
AC Power Input
The
CHEMTROL®
CT
Controller
is
a
dual-voltage
controller with a voltage selector switch located inside the
cabinet on the Power Board (see next page). Before
connecting the unit to an external power supply, make
sure that the voltage selector switch is set to the proper AC
power input: 115 V or 230 V.
CAUTION: Damage resulting from improper voltage
selection is not covered by manufacturer warranty.
Main Power Interlock
To prevent accidental chemical feeding, the controller and the
chemical feeders should always be interlocked - i.e. wired in
parallel - with the manual switch for the main pump so that
there is no danger of feeding the chemicals if there is no water
flow in the recirculation line.
Panel Interlock
For safety of operation, a panel interlock switch is mounted
inside the cabinet to shut off all internal power when the control
panel is open.
DO NOT ATTEMPT TO DEFEAT ITS PURPOSE !!!
PC Boards
There are two PC boards inside each controller cabinet: a
Power Board (Figure 5,
o
r Figure 10) and a Mother Board
(Figure 11). They contain all the electrical and electronic
components for the controller. The two boards are connected
together with a flexible ribbon cable.
The schematics for the two boards show the location of the key
components. In addition, all components are also labeled on
the PC boards themselves.
The PC boards are protected with a 1 A fuse that is mounted
on the upper right of the Power Board. If the fuse has to be
replaced, make sure to use a one (1) Amp fuse only. The use
of a larger fuse may cause irreparable damage to the
electronic boards.
Power Board
The Power Board (Figure 5, or Figure 10) is mounted on
the back panel of the controller cabinet. As shown on the
schematic, it contains all the high voltage (115 or 230 V)
circuits and components for inputs and outputs.
115V/230V Power Transformer
The CHEMTROL®
CT
Controller
is equipped with a
switchable, dual voltage power transformer that is mounted on
the Power Board inside the cabinet.
The voltage selector switch is located near the upper right of
the board. Always verify that the switch is set to the correct
voltage, either 115 or 230V. Connecting the controller to
higher voltage may cause damage to the electronics that is not
covered by the manufacturer’s warranty.