lrla @
T LL TY T9, 12, 23 30
FUNCTION
This controller ensures the efficient cleaning of the
filter mattress on initiation of a cleaning rycle after
each dutycycle of the Unimaster dust control unit.
To protect the Unimaster filter fabric, the controller
is interlocked so.that the fan motor cannot be
restarted during the operation of the cleaner motor.
SPECIFICATION
The equipment is housed in a rigid H/C box designed
to lP65 protection, with cable entries at top and
bottom. Functioning as a dual direct-on-line starter,
it comprises (1) a double-wound transformer with a
selection of input tappings for the incoming supply,
gMng an output of 24Y AC; (2)two contactors labelled
K1 and K2 (electrically interlocked to prevent
simultaneous operation) to control the fan and cleaner
motors; (3) a thermal overload relay with single
phase protection for the fan motor (no protection
being supplied for the cleaner motor except where
required by national regulations, as in France); (4) a
pre-set electronic timer module controlling the 'fan
rundown' and'cleaning' periods. These components
are all mounted on a baseplate within the box.
Timer ambient temperature range is -5"C to +40'C.
For temperatures outside these limits please refer
to DCE.
!NSTALI.ATION
Mount the controller independently of the Unimaster
dust control unit on a vertical surface free of vibration.
Bring the incoming mains via a switch-fuse unit
(preferably 'on-load' typelto the terminal block, {see
Table 1 for the fuse rating). Seal all joints at conduit
entry holes to prevent dust entering the box.
Publication 16244 (GB)
OVERLOAD SETIING
IMPORTANT Before start-up, the overload relay
calibration lever must be set at the value given by
motor full load current in Table 2.
OPERANNG RANGE
The controlldr is.suitable for use on a range of
3-phase, 50 - 60 Hz operating voltages, with fan
motors rated up to and including some at 11 kW. A
stardelta (Y/A) controller, type ECT SD, is available
for other 11 kW fans. S6e Table 2.
A variance of t10o/o is allowable on transformer
input tappings.
OPERATION
1. START (average operating period for fan, 4 hours)
Press 'START' button:
o Fan contactor K1 is energized; timer module sets
and fan motor runs.
2. CLEAN Press'CLEAN' button:
o Fan contactor K1 is de+nergized and the timer
energized.
O After approximately 90 seconds cleaner motor
contactor K2 is energized; cleaner motor now
runs for approximately 45 seconds.
o Cleaner motor contactor is decnergized and the
timer resumes inactive state.
Before a cleaning cycle can be initiated by pressing
the 'CLEAN' button, thefan contactor K1 must have
remained energized for at least 30 seconds.
A 'fail-safe'feature ensures that if the power supply
fails while the timer is performing a cycle, then re-
applying the power will not cause the cycle to be
completed. I nstead, the controller will automatically
re-set ready for the fan to be restarted.
KW
0.18
0.50
0.55
0.75
1.10
1,50
2.20
3.00
4.00
5.50
7.50
11.00
1.28
1.65
2.30
3.22
4.32
5.70
7.40
9.80
13.80
19.30
'1.26
1.60
2.20
3.15
4.20
5.40
7.00
9.20
13.00
18.20
Single Phase
110v 220v 240v
4.4
7.4
9.7
14.0
20.0
Table2-MotorCurtents
Three Phase
200v 220v 380v 415v 440v
1.40 1.20 0.75 0.69 0.65
2.2 2.2
3.3 3.3
4.t 4.7
6.5 6.5
,r_ r: 2.50 2.40 1.40
3.30 3.10 1.80
4.60 4.30 2.50
6.47 6.05 3.50
8.70 8.13 4.70
11.7810.72 6.20
15.4014.00 8.10
20.3018.5010.70
28.50 25.90 15.00
39.90 36.30 21.00
Figwes in-amps lor motds o,
otlrcrSrlcY-
Spaces marted le, not suitablo to. application
FLC Amps
0.00 -
0.45 -
0.95 -
1.51 -
4.00 -
Tablel-FuseRadng
HRC'Amp
Rating Fuse Wire
Amp Rating
6
8
'12
16
30
o.M
0.94
1.50
3.90
6.25
2
4
6
10
16
20
25
32
40
50
63
6.26
7.76
10.01
12.21
17.2'.1
21.61
7.75
10.00
12.20
17.20
21.60
29.00
T
Fuse \Nire
not recommended
'HRC. High rupturing capacity.
HRC Fusas: BS 88 Pan 2 1975 Class 0l l.E.C. 21 69:2
Fuse wiro sire basod upon sir times full load curent
