Alliance Laundry Systems PHM802N - Manual (Page 42)

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Specifications and Dimensions
F8138601 40
External Supplies
For proper communication between the washer-
extractor and an external chemical supply system, it is
important for the 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 washer-
extractor is to use the 300mA power of the washer-
extractor’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.
There are 3 terminals necessary for this
connection option.
• Terminal “24VAC COM” is used to connect one
side of the internal control transformer to the
external dispenser input signals common.
• The second 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 26.
IMPORTANT: Do not use the transformer
terminals if an external power supply is used.
PHM821N
1 External Supply Power 5 Red Jumper Wire
2 Internal Control Transformer 6 24VAC Terminal
3 RELAY COM Terminal 7 24VAC COM Terminal
4 External Supply Common
Figure 26
= Power
= Neutral
3
4
1
2
7
6
5