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External supplies – Alliance Laundry Systems CHM1772C User Manual

Page 56

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Installation

F8208301

54

© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT

External Supplies

For proper communication between the washer-

extractor and an external chemical supply system, it is

important for the low-voltage signal power to be

connected properly. The included wiring diagram

(F8133502) 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.
Basically, wash-cycle signals are provided to the

external chemical supply equipment and a “wait for

the next step” signal can be received from the supply

equipment. 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.

1. Use the Internal 24VAC 300 Control

Transformer (Recommended by Alliance

Laundry Systems)
There are 3 terminals necessary for this

connection option. Terminal “24VAC COM” is

used to connect 1 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”. Do not use the transformer

terminals if an external power supply is used.

2. Use an External AC Power Source (Not

Provided by Alliance Laundry Systems)

NOTE: Power for external supplies must not be

derived from the high-voltage main power

connection point.

The external power must supply power of

240VAC or less and be protected at 3 Amps or

less. Remove the red jumper wire installed by the

factory between “24VAC” and “RELAY COM”.

Connect 1 side of the external power to the

“RELAY COM” and the other to the external

dispenser input signals common.

CHM2336N

1

Relay Com

2

Red Jumper Wire

3

24 VAC

4

Transformer

Figure 30

EXTERNAL DISPENSER CONNECTIONS

RELAY COM

RELAY

COM

Supply 1

External
Dispensing
System

Internal

Supply

300mA Max

24VAC COM

24VAC COM

JUMPER FOR INTERNAL

24 VAC SUPPLY

CONNECTED TO RELAY

COM. (REMOVE IF NOT

WIRING TO INTERNAL

24 VAC SUPPLY

STEP 1: Insert screwdriver & press down

to open cage clamp.

STEP 2: Insert Wire

8.5mm

Strip Length

Wire Size 28-16AWG

0.08-1.5mm

24VAC

RED

ES 1

ES 2

ES 3

ES 4

EXAMPLE FOR EXTERNAL
DISPENSER CONNECTION

CHM2336N

2

4

1

3