Maytag Commercial MYR20, Installation Instructions Manual, Page: 15 / 24

15
ELECTRICAL CONNECTION
Multiple Single-Phase Machines in Line
When installing multiple single-phase washers into an existing
3-phase power supply, alternating the phases used as the hot
leg is recommended to evenly distribute power on the system.
See illustration.
Instructions For Grounding
This appliance must be connected to an equipment grounding
conductor that must run with the circuit conductors and
connected to the aluminum ground lug inside the rear electric
panel.
Connect the terminal strip and check that the connections
correspond to the operating voltage. Fit a 300 mA, type A,
immediate response differential protection.
The machine must be grounded. See the illustration on the
previous page.
Equipotential Bonding
In addition to the equipment-grounding conductor discussed
earlier that runs with the circuit conductor's and is connected
to the equipment grounding terminal, all washers or appliances
in the vicinity must be permanently interconnected with a
equipotential bonding conductor.
The external connection points marked on the back of the
washer serve for this purpose. See illustration below.
The cross-sectional area of the conductor must be at least
electrically equivalent to the cross-sectional area of the copper
conductor used to power the washer.
1. Protective grounding structure
2. External protective conductor connection point
3. Protective conductor
4. Grounding identification
Electrical connection of the liquid soap supply
system, if supplied (Optional on vended machines)
The power supplied to the liquid soap system must come from
an external electric source. Do not connect the system in the
washer. All work must be performed by a qualified technician in
compliance with all applicable local codes. Refer to the wiring
diagram found inside the washer attached to the side panel.
There is a labeled terminal block on the rear of the washer for
control signal connections. There is a corresponding strip of LED
lights to show when each signal is active. Refer to the wiring
diagram found inside the washer attached to the side panel.
Supply pump control signals are 24 VAC, maximum current is
10 mA. Wiring from the liquid soap system must be UL
Recognized (AVLV2 and AVLV8) and rated for 300 V minimum.
Route all wires through the supplied plastic bushing, making
sure to secure them with the cable clamp. Affix the cover to
the terminal block access before applying electric power to the
washer. See the Programming Guide for details on programming
the liquid soap system.
C2
C
H
F1
F2
LED
Lights
External Liquid Soap
Connection Cover
1
2
10
9
8
5
7
3
4
6
PE L1 L2 L3
L1
L2
L3
PE L1 L2 L3 PE L1 L2 L3
C2
C
H
F1
F2
C2
C
H
F1
F2
C2
C
H
F1
F2
2
3
1
3
2
3
4
1 Detergent signal
2 Bleach signal
3 Softener signal
4 Programmable signal 1
5 Programmable signal 2
6 Programmable signal 3
7 Programmable signal 4
8 Programmable signal 5
9 No output (do not use)
10 Neutral (common)