AEC Self Cleaning Continuous Filters - Manual (Page 20)

Self Cleaning Continuous Filter Chapter 3: Installation 19
3-3 Electrical Connections
Our Self Cleaning Continuous Filter systems come pre-wired and are ready to operate. They
are configured for 115/1/60 voltage and require a suitable grounded plug for use with a
grounded duplex receptacle.
Refer to the electrical diagrams enclosed in the Operation and Installation packet included
with your unit for specific wiring instructions.
Connecting Solid State Timer Control Panel
1. The timer is a completely solid state switching unit manufactured to rigid
specifications. The timer is capable of switching up to 10 outputs at 1 amp each with
115 volts line input. Each output is capable of handling one solenoid on each air
header and can handle up to six headers for a total of sixty solenoids, i.e. sixty rows
of filter bags per timer.
2. The timing range is fully adjustable for optimum collector performance. The “ON
TIME” (pulse duration) is adjustable from 0.05 seconds to 0.5 seconds. The “OFF
TIME” (interval between pulses) can be varied from 1.5 to 30 seconds. An indicator
light for “power on” is prominently located on the board as well as lights which
indicate which row of bags is being cleaned. If desired, the timer can be activated by
an external differential pressure switch. In this arrangement the cleaning cycle would
be used only when it is necessary, as determined by a preset pressure drop across the
tubesheet.
3. The standard timer is shipped in a NEMA 4, weatherproof enclosure for mounting by
the customer. Other enclosures are available for hazardous applications.
4. If the timer is to be mounted on the collector, vibration mounts should be provided.
It is more desirable to mount the timer away from the collector in an accessible
location that is free from vibration. The timer should not be exposed to temperatures
over 120°F.
5. Install an “ON-OFF” switch in the power supply to the timer. Connect 115 volt,
single phase, 60 Hz, 10 amperes input through this switch to timer terminals marked
“Line L1” and “L2.” In grounded systems connect neutral of line to “L2.”
6. Connect wiring between the timer and solenoid valves; one side of each solenoid to
the timer common terminal marked “SOL COM.”, and the other side of the first
solenoid to the timer output marked “Solenoids 1”, the second solenoid to “Solenoids
2”, etc.
7. The black program wire in the timer should be connected to the “COMPARTMENT
USED” socket number which is the same number as the highest numbered
“Solenoids” terminal which is used. For example: if eight solenoids are connected to
the timer, the program wire should be connected to the number 8 “COMPARTMENT
USED” socket.