© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Specifications and Dimensions
37
F8410701 (EN)
External Supplies
For proper communication between the machine and
an external chemical supply system, it is important for
the low-voltage signal power to be connected properly.
The included wiring diagram shows several different
options for safe and correct wiring of this interface.
The preferred method for connecting the wiring from
the external chemical supply system to the machine is
to use the 300mA power of the machine’s 24VAC
control transformer, which is intended strictly for this
purpose. Other voltage and current options are
available, but require some wiring changes and must
be provided with an external power source. Under no
circumstances should the high-voltage machine supply
connections or source be used for the communication
wiring.
Communication wiring connections, which include a
single row of identified terminal blocks, can be found
under a service panel at the upper back of the machine.
Chemical Injection Using Internal 24VAC
Control Transformer
NOTE: Using the Internal 24VAC 300 Milliamp
Control Transformer is recommended by Alliance
Laundry Systems.
IMPORTANT: DO NOT remove the red jumper
wire from the terminal strip.
• Terminal “24VAC COM” is used to connect one
side of the internal control transformer to the
external dispenser input signals common.
• The other terminal is used to connect the other
side of the control transformer to the washer-
extractor output signals common through a red
jumper wire between “24VAC” and “RELAY
COM”. Refer to Figure 24.
IMPORTANT: Do not use the transformer
terminals if an external power supply is used.
PHM821N
1 External Supply Power Output 5 Red Jumper Wire
2 Internal Control Transformer 6 24VAC Terminal
3 RELAY COM Terminal 7 24VAC COM Terminal
4 External Dispenser Input Signal Common
Figure 24
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