Chapter 1. Commissioning
PELLERIN MILNOR CORPORATION
1.4.1.
Pump Signal Connections
The microprocessor controller used on C_E models closes certain relay contacts when chemicals
are desired. These signals are alternating current at the control voltage and cannot be made
potential-free. Any device driven by this signal can draw up to 37 milliamperes.
CAUTION 20 : Component Damage Hazard
—Board components will burn out and
require board replacement if devices driven by inject signals do not meet the above electrical
specifications. Pumps usually draw a higher current than specified above, and will cause board
damage.
This machine provides signals for three chemicals. Table 2 contains the connection details for
these signals. All chemical signal connections are available on terminal strip TBS, as shown in
Figure 8. This terminal strip is located in the electrical enclosure on the left rear of the machine,
where the machine power connections are made.
Table 2: Chemical Injection Signals
Signal
Component
Chemical
Relay
Processor Board
Connection
TBS Terminal
Number
Chemical 1
Detergent
K10
MTA6-3, 4
1
Chemical 2
Bleach
K09
MTA6-7, 8
2
Chemical 3
Fabric softener
K08
MTA6-9, 10
3
Figure 8: Pump Signal Connections
Electrical Connections Enclosure
Legend
.
A.
Detergent signal
B.
Bleach signal
C.
Sour and starch/softener
signal
D.
Manifold flush signal (not
used on C_E coin
models)
E.
Chemical signal common
F.
Machine power
connections
